checkpoint

Make srcmounts readonly

.cirrus.yml

@@ -0,0 +1,512 @@
+freebsd_task:
+  name: "freebsd:11.4"
+  freebsd_instance:
+    image_family: freebsd-11-4
+  env:
+    ASSUME_ALWAYS_YES: yes
+  script:
+    - tools/install-build-pkgs
+    - gmake -j4
+
+freebsd_task:
+  name: "freebsd:12.1"
+  freebsd_instance:
+    image_family: freebsd-12-1
+  env:
+    ASSUME_ALWAYS_YES: yes
+  script:
+    - tools/install-build-pkgs
+    - gmake -j4
+
+freebsd_task:
+  name: "freebsd:12.2"
+  freebsd_instance:
+    image_family: freebsd-12-2
+  env:
+    ASSUME_ALWAYS_YES: yes
+  script:
+    - tools/install-build-pkgs
+    - gmake -j4
+
+freebsd_task:
+  name: "freebsd:13.0"
+  freebsd_instance:
+    image_family: freebsd-13-0
+  env:
+    ASSUME_ALWAYS_YES: yes
+  script:
+    - tools/install-build-pkgs
+    - gmake -j4
+
+
+#macos_task:
+#  osx_instance:
+#    image: catalina-base
+#  script:
+#    - tools/install-build-pkgs
+#    - gmake -j4
+
+linux_task:
+  name: "alpine:3.11"
+  container:
+    image: alpine:3.11
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.12"
+  container:
+    image: alpine:3.12
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.13"
+  container:
+    image: alpine:3.13
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.14"
+  container:
+    image: alpine:3.14
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.15"
+  container:
+    image: alpine:3.15
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.16"
+  container:
+    image: alpine:3.16
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:3.17"
+  container:
+    image: alpine:3.17
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine:latest"
+  container:
+    image: alpine:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "alpine-arm:latest"
+  arm_container:
+    image: alpine:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make STATIC=1 LTO=1
+
+linux_task:
+  name: "centos:7"
+  container:
+    image: centos:7
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "rocky:8"
+  container:
+    image: rocky:8
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:30"
+  container:
+    image: fedora:30
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:31"
+  container:
+    image: fedora:31
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:32"
+  container:
+    image: fedora:32
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:33"
+  container:
+    image: fedora:33
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:34"
+  container:
+    image: fedora:34
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:35"
+  container:
+    image: fedora:35
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:36"
+  container:
+    image: fedora:36
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:37"
+  container:
+    image: fedora:37
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:38"
+  container:
+    image: fedora:38
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora:latest"
+  container:
+    image: fedora:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "fedora-arm:latest"
+  arm_container:
+    image: fedora:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - make
+    - make rpm
+
+linux_task:
+  name: "ubuntu:14.04"
+  container:
+    image: ubuntu:14.04
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu:16.04"
+  container:
+    image: ubuntu:16.04
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu:18.04"
+  container:
+    image: ubuntu:18.04
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu:20.04"
+  container:
+    image: ubuntu:20.04
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu:22.04"
+  container:
+    image: ubuntu:22.04
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu:latest"
+  container:
+    image: ubuntu:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "ubuntu-arm:latest"
+  arm_container:
+    image: ubuntu:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:7"
+  container:
+    image: debian:8
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:8"
+  container:
+    image: debian:8
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:9"
+  container:
+    image: debian:9
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:10"
+  container:
+    image: debian:10
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:11"
+  container:
+    image: debian:11
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian:latest"
+  container:
+    image: debian:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true
+
+linux_task:
+  name: "debian-arm:latest"
+  arm_container:
+    image: debian:latest
+    cpu: 4
+    memory: 4G
+  timeout_in: 15m
+  script:
+    - tools/install-build-pkgs
+    - git fetch
+    - make deb
+    - apt-get -y install fuse
+    - dpkg -i ../*.deb
+    - mergerfs -v || true

.github/FUNDING.yml

@@ -0,0 +1,7 @@
+# These are supported funding model platforms
+
+github: [trapexit]
+patreon: trapexit
+custom: ['https://paypal.me/trapexit','https://buymeacoff.ee/trapexit']
+ko_fi: trapexit
+open_collective: trapexit

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,49 @@
+---
+name: Bug report
+about: For the reporting of behavior not as described
+title: ''
+labels: bug, investigating
+assignees: ''
+
+---
+
+**Describe the bug**
+
+A clear and concise description of the unexpected behavior.
+
+**Please be sure to use latest release of mergerfs to ensure the issue still exists. Not your distro's latest but the latest official release.**
+
+The master branch is **not** to be considered production ready. Feel free to file bug reports but do so indicating clearly that you are testing unreleased code.
+
+
+**To Reproduce**
+
+Steps to reproduce the behavior. List **all** steps to reproduce. **All** settings.
+
+Please simplify the reproduction as much as possible.
+ - Unless it is dependenat on multiple branches, use a single branch
+ - Reproduce with standard tooling if possible (touch,truncate,rm,rmdir,ln,etc.) Having to install 3rd party software will make debugging more difficult.
+
+
+**Expected behavior**
+
+A clear and concise description of the expected behavior.
+
+
+**System information:**
+
+ - OS, kernel version: `uname -a`
+ - mergerfs version: `mergerfs -V`
+ - mergerfs settings
+ - List of drives, filesystems, & sizes:
+   - `df -h`
+   - `lsblk -f`
+ - A strace of the application having a problem:
+   - `strace -fvTtt -s 256 -o /tmp/app.strace.txt <cmd>`
+   - `strace -fvTtt -s 256 -o /tmp/app.strace.txt -p <appPID>`
+ - strace of mergerfs while app tried to do it's thing:
+   - `strace -fvTtt -s 256 -p <mergerfsPID> -o /tmp/mergerfs.strace.txt`
+
+**Additional context**
+
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: feature, investigating
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,10 @@
+---
+name: Question
+about: When you're looking for information or general support
+title: ''
+labels: investigating, question
+assignees: ''
+
+---
+
+For general questions and support please use [GitHub Discussions](https://github.com/trapexit/mergerfs/discussions) or [Discord](https://discord.gg/MpAr69V).

.github/issue_template.md

@@ -1,34 +0,0 @@
-General description
-===================
-
-
-
-Expected behavior
-=================
-
-
-
-Actual behavior
-===============
-
-
-
-**Precise** steps to reproduce the behavior
-===========================================
-
-> Explicitly list **all** steps to reproduce. Preferably create a minimal example of the problem using standard command line tools. The more variables (apps, settings, etc.) that are involved the more difficult it is to debug. Also, **please** be sure to have read all of the README. It contains a lot of information regarding known system and user issues.
-
-
-
-System information
-==================
-Please provide as much of the following information as possible:
-
-* [ ] mergerfs version: `mergerfs -V`
-* [ ] mergerfs settings: `cat /etc/fstab` or the command line arguments
-* [ ] Linux version: `uname -a`
-* [ ] Versions of any additional software being used
-* [ ] List of drives, filesystems, & sizes: `df -h`
-* [ ] strace of application having problem: `strace -f -o /tmp/app.strace.txt <cmd>` or `strace -f -p <appPID> -o /tmp/app.strace.txt`
-* [ ] strace of mergerfs while app tried to do it's thing: `strace -f -p <mergerfsPID> -o /tmp/mergerfs.strace.txt`
-

.github/workflows/codeql.yml

@@ -0,0 +1,42 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: "7 3 * * 6"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ python, cpp ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v2
+        with:
+          languages: ${{ matrix.language }}
+          queries: +security-and-quality
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v2
+        if: ${{ matrix.language == 'python' || matrix.language == 'cpp' }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v2
+        with:
+          category: "/language:${{ matrix.language }}"

.travis.yml

@@ -1,34 +0,0 @@
-language: cpp
-
-matrix:
-  include:
-    - os: linux
-      dist: precise
-      compiler: gcc
-      sudo: required
-    - os: linux
-      dist: precise
-      compiler: clang
-      sudo: required
-    - os: linux
-      dist: trusty
-      compiler: gcc
-      sudo: required
-    - os: linux
-      dist: trusty
-      compiler: clang
-      sudo: required
-    - os: linux
-      dist: xenial
-      compiler: gcc
-      sudo: required
-    - os: linux
-      dist: xenial
-      compiler: clang
-      sudo: required
-
-script:
-  - sudo -E apt-get install fakeroot
-  - sudo -E make install-build-pkgs
-  - make
-  - make deb

LICENSE

@@ -1,7 +1,7 @@
 /*
   ISC License
 
-  Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
+  Copyright (c) 2023, Antonio SJ Musumeci <trapexit@spawn.link>
 
   Permission to use, copy, modify, and/or distribute this software for any
   purpose with or without fee is hereby granted, provided that the above

Makefile

@@ -37,13 +37,12 @@ endif
 endif
 
 USE_XATTR = 1
-
-FUSE_CFLAGS = -D_FILE_OFFSET_BITS=64 -Ilibfuse/include
+UGID_USE_RWLOCK = 0
 
 ifeq ($(DEBUG),1)
-DEBUG_FLAGS := -g
+OPT_FLAGS := -O0 -g -fsanitize=undefined
 else
-DEBUG_FLAGS :=
+OPT_FLAGS := -O2
 endif
 
 ifeq ($(STATIC),1)
@@ -58,29 +57,42 @@ else
 LTO_FLAGS :=
 endif
 
-UGID_USE_RWLOCK = 0
-
-OPTS 	    = -O2
 SRC	    = $(wildcard src/*.cpp)
-OBJS        = $(SRC:src/%.cpp=build/%.o)
-DEPS        = $(SRC:src/%.cpp=build/%.d)
+OBJS        = $(SRC:src/%.cpp=build/.src/%.o)
+DEPS        = $(SRC:src/%.cpp=build/.src/%.d)
+
+TESTS       = $(wildcard tests/*.cpp)
+TESTS_OBJS  = $(filter-out build/.src/mergerfs.o,$(OBJS))
+TESTS_OBJS += $(TESTS:tests/%.cpp=build/.tests/%.o)
+TESTS_DEPS  = $(TESTS:tests/%.cpp=build/.tests/%.d)
+TESTS_DEPS += $(DEPS)
+
 MANPAGE     = mergerfs.1
-CXXFLAGS   += \
-	      $(OPTS) \
-              $(DEBUG_FLAGS) \
+CXXFLAGS    ?= ${OPT_FLAGS}
+CXXFLAGS    := \
+              ${CXXFLAGS} \
+              -std=c++11 \
               $(STATIC_FLAGS) \
               $(LTO_FLAGS) \
               -Wall \
-	      -Wno-unused-result \
-              $(FUSE_CFLAGS) \
-              -DFUSE_USE_VERSION=29 \
-              -MMD \
+              -Wno-unused-result \
+              -MMD
+FUSE_FLAGS = \
+              -Ilibfuse/include \
+              -D_FILE_OFFSET_BITS=64
+MFS_FLAGS  = \
 	      -DUSE_XATTR=$(USE_XATTR) \
 	      -DUGID_USE_RWLOCK=$(UGID_USE_RWLOCK)
-LDFLAGS    += \
-	      -pthread \
-              -lrt
+TESTS_FLAGS = \
+              -Isrc \
+              -DTESTS
 
+LDFLAGS := \
+    ${LDFLAGS} \
+    -pthread \
+    -lrt
+
+DESTDIR       =
 PREFIX        = /usr/local
 EXEC_PREFIX   = $(PREFIX)
 DATAROOTDIR   = $(PREFIX)/share
@@ -107,11 +119,19 @@ help:
 objects: version build/stamp
 	$(MAKE) $(OBJS)
 
+tests-objects:
+	$(MAKE) $(TESTS_OBJS)
+
 build/mergerfs: libfuse objects
-	$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(OBJS) -o $@ libfuse/build/libfuse.a $(LDFLAGS)
+	$(CXX) $(CXXFLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) $(OBJS) -o $@ libfuse/build/libfuse.a $(LDFLAGS)
+
+build/tests: build/mergerfs tests-objects
+	$(CXX) $(CXXFLAGS) $(TESTS_FLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) $(TESTS_OBJS) -o $@ libfuse/build/libfuse.a $(LDFLAGS)
 
 mergerfs: build/mergerfs
 
+tests: build/tests
+
 changelog:
 ifeq ($(GIT_REPO),1)
 	$(GIT2DEBCL) --name mergerfs > ChangeLog
@@ -124,11 +144,15 @@ version:
 	tools/update-version
 
 build/stamp:
-	$(MKDIR) -p build
+	$(MKDIR) -p build/.src build/.tests
 	$(TOUCH) $@
 
-build/%.o: src/%.cpp
-	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $< -o $@
+build/.src/%.o: src/%.cpp
+	$(CXX) $(CXXFLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) -c $< -o $@
+
+build/.tests/%.o: tests/%.cpp
+	$(CXX) $(CXXFLAGS) $(TESTS_FLAGS) $(FUSE_FLAGS) $(MFS_FLAGS) $(CPPFLAGS) -c $< -o $@
+
 
 .PHONY: clean
 clean: rpm-clean
@@ -142,15 +166,15 @@ ifeq ($(GIT_REPO),1)
 endif
 
 .PHONY: install
-install: install-base install-mount.mergerfs install-man
+install: install-base install-mount-tools install-man
 
 install-base: build/mergerfs
 	$(MKDIR) -p "$(INSTALLBINDIR)"
 	$(INSTALL) -v -m 0755 build/mergerfs "$(INSTALLBINDIR)/mergerfs"
 
-install-mount.mergerfs: install-base
+install-mount-tools: install-base
 	$(MKDIR) -p "$(INSTALLBINDIR)"
-	$(LN) -s "mergerfs" "$(INSTALLBINDIR)/mount.mergerfs"
+	$(MAKE) -C libfuse install
 
 install-man: $(MANPAGE)
 	$(MKDIR) -p "$(INSTALLMAN1DIR)"
@@ -230,6 +254,6 @@ install-build-pkgs:
 
 .PHONY: libfuse
 libfuse:
-	$(MAKE) -C libfuse
+	$(MAKE) DEBUG=$(DEBUG) -C libfuse
 
 -include $(DEPS)

debian/mergerfs.postinst

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -e
+
+case "${1}" in
+    configure)
+        chmod 4755 /usr/bin/mergerfs-fusermount
+        ;;
+esac

debian/rules

@@ -2,7 +2,7 @@
 # -*- makefile -*-
 
 # Uncomment this to turn on verbose mode.
-#export DH_VERBOSE=1
+export DH_VERBOSE=1
 
 %:
 	dh $@ --parallel

libfuse/Makefile

@@ -1,50 +1,88 @@
-VERSION = "2.9.7-mergerfs_2.27.0"
-OPT = -O2
+VERSION = 2.9.7-mergerfs_2.30.0
 
-ifeq ($(DEBUG),1)
-DEBUG_FLAGS := -g
+OS := $(shell uname -s)
+ifeq ($(OS),Linux)
+UTILS := utils
+INSTALLUTILS := install-utils
 else
-DEBUG_FLAGS :=
+UTILS :=
+INSTALLUTILS :=
 endif
 
-DESTDIR = "/"
-BINDIR = "/bin"
-SBINDIR = "/sbin"
-SRC   = \
+ifeq ($(DEBUG),1)
+OPT_FLAGS := -O0 -g -fsanitize=undefined
+else
+OPT_FLAGS := -O2
+endif
+
+DESTDIR       =
+PREFIX        = /usr/local
+EXEC_PREFIX   = $(PREFIX)
+DATAROOTDIR   = $(PREFIX)/share
+DATADIR       = $(DATAROOTDIR)
+BINDIR        = $(EXEC_PREFIX)/bin
+SBINDIR       = /sbin
+MANDIR        = $(DATAROOTDIR)/man
+MAN1DIR       = $(MANDIR)/man1
+
+INSTALLBINDIR  = $(DESTDIR)$(BINDIR)
+INSTALLSBINDIR = $(DESTDIR)$(SBINDIR)
+INSTALLMAN1DIR = $(DESTDIR)$(MAN1DIR)
+
+AR ?= ar
+
+SRC_C = \
 	lib/buffer.c \
-	lib/cuse_lowlevel.c \
+	lib/crc32b.c \
+	lib/debug.c \
 	lib/fuse.c \
-	lib/fuse_kern_chan.c \
-	lib/fuse_loop.c \
-	lib/fuse_loop_mt.c \
+	lib/fuse_dirents.c \
 	lib/fuse_lowlevel.c \
 	lib/fuse_mt.c \
+	lib/fuse_node.c \
 	lib/fuse_opt.c \
 	lib/fuse_session.c \
 	lib/fuse_signals.c \
 	lib/helper.c \
 	lib/mount.c
-OBJS = $(SRC:lib/%.c=build/%.o)
-DEPS = $(SRC:lib/%.c=build/%.d)
-
-CFLAGS += \
-	$(OPT) \
-	$(DEBUG_FLAGS) \
+SRC_CPP = \
+	lib/format.cpp \
+	lib/os.cpp \
+	lib/cpu.cpp \
+	lib/fuse_loop_mt.cpp \
+	lib/fuse_msgbuf.cpp
+OBJS_C   = $(SRC_C:lib/%.c=build/%.o)
+OBJS_CPP = $(SRC_CPP:lib/%.cpp=build/%.o)
+DEPS_C   = $(SRC_C:lib/%.c=build/%.d)
+DEPS_CPP = $(SRC_CPP:lib/%.cpp=build/%.d)
+CFLAGS ?= \
+	$(OPT_FLAGS)
+CFLAGS := \
+	${CFLAGS} \
+	-std=gnu99 \
 	-Wall \
 	-pipe \
-	'-D_FILE_OFFSET_BITS=64' \
-	'-D_REENTRANT' \
-	'-DFUSE_USE_VERSION=29' \
-	'-DFUSERMOUNT_DIR="/usr/local/bin"' \
-	'-DPACKAGE_VERSION=$(VERSION)' \
+	-MMD
+CXXFLAGS := \
+	${CXXFLAGS} \
+	-std=c++11 \
+	-Wall \
+	-pipe \
+	-MMD
+FUSERMOUNT_DIR = $(BINDIR)
+FUSE_FLAGS = \
 	-Iinclude \
 	-Ibuild \
-	-MMD
-LDFLAGS += \
+	-D_REENTRANT \
+	-D_FILE_OFFSET_BITS=64 \
+	-DPACKAGE_VERSION=\"$(VERSION)\" \
+	-DFUSERMOUNT_DIR=\"$(FUSERMOUNT_DIR)\"
+LDFLAGS := \
+	${LDFLAGS} \
 	-lrt \
 	-pthread
 
-all: build/libfuse.a
+all: build/libfuse.a $(UTILS)
 
 build/config.h: build/stamp
 	ecfd/build | tee build/config.h
@@ -54,31 +92,46 @@ build/stamp:
 	touch $@
 
 objects: build/config.h
-	$(MAKE) $(OBJS)
+	$(MAKE) $(OBJS_C) $(OBJS_CPP)
 
 build/libfuse.a: objects
-	ar rcs build/libfuse.a $(OBJS)
+	${AR} rcs build/libfuse.a $(OBJS_C) $(OBJS_CPP)
 
-build/mergerfs-mount: build/config.h util/fusermount.c lib/mount_util.c
-	$(CC) $(CFLAGS) -Ilib -o mergerfs-mount util/fusermount.c lib/mount_util.c
+utils: mergerfs-fusermount mount.mergerfs
 
-build/mount.mergerfs: build/libfuse.a util/mount.fuse.c
-	$(CC) $(CFLAGS) -o mount.mergerfs util/mount.fuse.c build/libfuse.a $(LDFLAGS)
+build/mergerfs-fusermount: build/config.h util/fusermount.c lib/mount_util.c
+	$(CC) $(CFLAGS) $(FUSE_FLAGS) -Ilib -o build/mergerfs-fusermount util/fusermount.c lib/mount_util.c
+
+mergerfs-fusermount: build/mergerfs-fusermount
+
+build/mount.mergerfs: build/libfuse.a util/mount.mergerfs.c
+	$(CC) $(CFLAGS) $(FUSE_FLAGS) -o build/mount.mergerfs util/mount.mergerfs.c build/libfuse.a $(LDFLAGS)
+
+mount.mergerfs: build/mount.mergerfs
 
 build/%.o: lib/%.c
-	$(CC) $(CFLAGS) -c $< -o $@
+	$(CC) $(CFLAGS) $(FUSE_FLAGS) -c $< -o $@
+
+build/%.o: lib/%.cpp
+	$(CXX) $(CXXFLAGS) $(FUSE_FLAGS) -c $< -o $@
 
 clean:
 	rm -rf build
 
 distclean: clean
 
-install: build/mergerfs-mount build/mount.mergerfs
-	install -D build/mergerfs-mount "$(DESTDIR)$(BINDIR)/mergerfs-mount"
-	chown root:root "$(DESTDIR)$(BINDIR)/mergerfs-mount"
-	chmod u+s "$(DESTDIR)$(BINDIR)/mergerfs-mount"
-	install -D build/mount.mergerfs "$(DESTDIR)$(SBINDIR)/mount.mergerfs"
+strip:
+	strip --strip-all build/mount.mergerfs
+	strip --strip-all build/mergerfs-fusermount
 
-.PHONY: objects
+install-utils: mergerfs-fusermount mount.mergerfs strip
+	install -D build/mergerfs-fusermount "$(INSTALLBINDIR)/mergerfs-fusermount"
+	install -D build/mount.mergerfs "$(INSTALLSBINDIR)/mount.mergerfs"
+	chown root "$(INSTALLBINDIR)/mergerfs-fusermount"
+	chmod u+s "$(INSTALLBINDIR)/mergerfs-fusermount"
 
--include $(DEPS)
+install: $(INSTALLUTILS)
+
+.PHONY: objects strip utils install install-utils
+
+-include $(DEPS_C) $(DEPS_CPP)

libfuse/ecfd/tests/HAVE_MALLOC_TRIM.c

@@ -0,0 +1,7 @@
+#include <malloc.h>
+
+int
+main()
+{
+  malloc_trim(0);
+}

libfuse/ecfd/tests/HAVE_SPLICE.c

@@ -1,11 +0,0 @@
-#define _GNU_SOURCE
-#include <fcntl.h>
-
-int
-main(int   argc,
-     char *argv[])
-{
-  (void)splice;
-
-  return 0;
-}

libfuse/ecfd/tests/HAVE_VMSPLICE.c

@@ -1,12 +0,0 @@
-#define _GNU_SOURCE
-#include <fcntl.h>
-#include <sys/uio.h>
-
-int
-main(int   argc,
-     char *argv[])
-{
-  (void)vmsplice;
-
-  return 0;
-}

libfuse/fuse.pc.in

@@ -1,11 +0,0 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: fuse
-Description: Filesystem in Userspace
-Version: @VERSION@
-Libs: -L${libdir} -lfuse -pthread
-Libs.private: @libfuse_libs@
-Cflags: -I${includedir}/fuse -D_FILE_OFFSET_BITS=64

libfuse/include/Makefile.am

@@ -1,17 +0,0 @@
-## Process this file with automake to produce Makefile.in
-
-fuseincludedir=$(includedir)/fuse
-
-fuseinclude_HEADERS = \
-	fuse.h			\
-	fuse_compat.h		\
-	fuse_common.h		\
-	fuse_common_compat.h    \
-	fuse_lowlevel.h		\
-	fuse_lowlevel_compat.h	\
-	fuse_opt.h		\
-	cuse_lowlevel.h
-
-include_HEADERS = old/fuse.h ulockmgr.h
-
-noinst_HEADERS = fuse_kernel.h

libfuse/include/cuse_lowlevel.h

@@ -1,87 +0,0 @@
-/*
-  CUSE: Character device in Userspace
-  Copyright (C) 2008-2009  SUSE Linux Products GmbH
-  Copyright (C) 2008-2009  Tejun Heo <tj@kernel.org>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-
-  Read example/cusexmp.c for usages.
-*/
-
-#ifndef _CUSE_LOWLEVEL_H_
-#define _CUSE_LOWLEVEL_H_
-
-#ifndef FUSE_USE_VERSION
-#define FUSE_USE_VERSION 29
-#endif
-
-#include "fuse_lowlevel.h"
-
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define CUSE_UNRESTRICTED_IOCTL		(1 << 0) /* use unrestricted ioctl */
-
-struct fuse_session;
-
-struct cuse_info {
-	unsigned	dev_major;
-	unsigned	dev_minor;
-	unsigned	dev_info_argc;
-	const char	**dev_info_argv;
-	unsigned	flags;
-};
-
-/*
- * Most ops behave almost identically to the matching fuse_lowlevel
- * ops except that they don't take @ino.
- *
- * init_done	: called after initialization is complete
- * read/write	: always direct IO, simultaneous operations allowed
- * ioctl	: might be in unrestricted mode depending on ci->flags
- */
-struct cuse_lowlevel_ops {
-	void (*init) (void *userdata, struct fuse_conn_info *conn);
-	void (*init_done) (void *userdata);
-	void (*destroy) (void *userdata);
-	void (*open) (fuse_req_t req, struct fuse_file_info *fi);
-	void (*read) (fuse_req_t req, size_t size, off_t off,
-		      struct fuse_file_info *fi);
-	void (*write) (fuse_req_t req, const char *buf, size_t size, off_t off,
-		       struct fuse_file_info *fi);
-	void (*flush) (fuse_req_t req, struct fuse_file_info *fi);
-	void (*release) (fuse_req_t req, struct fuse_file_info *fi);
-	void (*fsync) (fuse_req_t req, int datasync, struct fuse_file_info *fi);
-	void (*ioctl) (fuse_req_t req, int cmd, void *arg,
-		       struct fuse_file_info *fi, unsigned int flags,
-		       const void *in_buf, size_t in_bufsz, size_t out_bufsz);
-	void (*poll) (fuse_req_t req, struct fuse_file_info *fi,
-		      struct fuse_pollhandle *ph);
-};
-
-struct fuse_session *cuse_lowlevel_new(struct fuse_args *args,
-				       const struct cuse_info *ci,
-				       const struct cuse_lowlevel_ops *clop,
-				       void *userdata);
-
-struct fuse_session *cuse_lowlevel_setup(int argc, char *argv[],
-					 const struct cuse_info *ci,
-					 const struct cuse_lowlevel_ops *clop,
-					 int *multithreaded, void *userdata);
-
-void cuse_lowlevel_teardown(struct fuse_session *se);
-
-int cuse_lowlevel_main(int argc, char *argv[], const struct cuse_info *ci,
-		       const struct cuse_lowlevel_ops *clop, void *userdata);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _CUSE_LOWLEVEL_H_ */

libfuse/include/extern_c.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#ifdef __cplusplus
+#define EXTERN_C_BEGIN extern "C" {
+#define EXTERN_C_END }
+#else
+#define EXTERN_C_BEGIN
+#define EXTERN_C_END
+#endif

libfuse/include/fuse_attr.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct fuse_attr_s fuse_attr_t;
+struct fuse_attr_s
+{
+  uint64_t ino;
+  uint64_t size;
+  uint64_t blocks;
+  uint64_t atime;
+  uint64_t mtime;
+  uint64_t ctime;
+  uint32_t atimensec;
+  uint32_t mtimensec;
+  uint32_t ctimensec;
+  uint32_t mode;
+  uint32_t nlink;
+  uint32_t uid;
+  uint32_t gid;
+  uint32_t rdev;
+  uint32_t blksize;
+  uint32_t _padding;
+};

libfuse/include/fuse_common.h

@@ -15,7 +15,10 @@
 #ifndef _FUSE_COMMON_H_
 #define _FUSE_COMMON_H_
 
+#include "extern_c.h"
 #include "fuse_opt.h"
+#include "fuse_timeouts.h"
+
 #include <stdint.h>
 #include <sys/types.h>
 
@@ -33,58 +36,60 @@
 #error Please add -D_FILE_OFFSET_BITS=64 to your compile flags!
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
+#define FUSE_MAX_MAX_PAGES 256
+
+EXTERN_C_BEGIN
 
 /**
  * Information about open files
  *
  * Changed in version 2.5
  */
-struct fuse_file_info {
-	/** Open flags.	 Available in open() and release() */
-	int flags;
+typedef struct fuse_file_info_t fuse_file_info_t;
+struct fuse_file_info_t
+{
+  /** Open flags. Available in open() and release() */
+  int flags;
 
-	/** Old file handle, don't use */
-	unsigned long fh_old;
+  /** In case of a write operation indicates if this was caused by a
+      writepage */
+  uint32_t writepage : 1;
 
-	/** In case of a write operation indicates if this was caused by a
-	    writepage */
-	int writepage;
+  /** Can be filled in by open, to use direct I/O on this file.
+      Introduced in version 2.4 */
+  uint32_t direct_io : 1;
 
-	/** Can be filled in by open, to use direct I/O on this file.
-	    Introduced in version 2.4 */
-	unsigned int direct_io : 1;
+  /** Can be filled in by open, to indicate, that cached file data
+      need not be invalidated.  Introduced in version 2.4 */
+  uint32_t keep_cache : 1;
 
-	/** Can be filled in by open, to indicate, that cached file data
-	    need not be invalidated.  Introduced in version 2.4 */
-	unsigned int keep_cache : 1;
+  /** Indicates a flush operation.  Set in flush operation, also
+      maybe set in highlevel lock operation and lowlevel release
+      operation.	Introduced in version 2.6 */
+  uint32_t flush : 1;
 
-	/** Indicates a flush operation.  Set in flush operation, also
-	    maybe set in highlevel lock operation and lowlevel release
-	    operation.	Introduced in version 2.6 */
-	unsigned int flush : 1;
+  /** Can be filled in by open, to indicate that the file is not
+      seekable.  Introduced in version 2.8 */
+  uint32_t nonseekable : 1;
 
-	/** Can be filled in by open, to indicate that the file is not
-	    seekable.  Introduced in version 2.8 */
-	unsigned int nonseekable : 1;
+  /* Indicates that flock locks for this file should be
+     released.  If set, lock_owner shall contain a valid value.
+     May only be set in ->release().  Introduced in version
+     2.9 */
+  uint32_t flock_release : 1;
 
-	/* Indicates that flock locks for this file should be
-	   released.  If set, lock_owner shall contain a valid value.
-	   May only be set in ->release().  Introduced in version
-	   2.9 */
-	unsigned int flock_release : 1;
+  /* Requests the kernel to cache entries returned by readdir */
+  uint32_t cache_readdir : 1;
 
-	/** Padding.  Do not use*/
-	unsigned int padding : 27;
+  uint32_t auto_cache : 1;
 
-	/** File handle.  May be filled in by filesystem in open().
-	    Available in all other file operations */
-	uint64_t fh;
+  /** File handle.  May be filled in by filesystem in open().
+      Available in all other file operations */
+  uint64_t fh;
 
-	/** Lock owner id.  Available in locking operations and flush */
-	uint64_t lock_owner;
+  /** Lock owner id.  Available in locking operations and flush */
+  uint64_t lock_owner;
 };
 
 /**
@@ -96,26 +101,26 @@ struct fuse_file_info {
  * FUSE_CAP_EXPORT_SUPPORT: filesystem handles lookups of "." and ".."
  * FUSE_CAP_BIG_WRITES: filesystem can handle write size larger than 4kB
  * FUSE_CAP_DONT_MASK: don't apply umask to file mode on create operations
- * FUSE_CAP_SPLICE_WRITE: ability to use splice() to write to the fuse device
- * FUSE_CAP_SPLICE_MOVE: ability to move data to the fuse device with splice()
- * FUSE_CAP_SPLICE_READ: ability to use splice() to read from the fuse device
  * FUSE_CAP_IOCTL_DIR: ioctl support on directories
+ * FUSE_CAP_CACHE_SYMLINKS: cache READLINK responses
  */
-#define FUSE_CAP_ASYNC_READ      (1 << 0)
-#define FUSE_CAP_POSIX_LOCKS     (1 << 1)
-#define FUSE_CAP_ATOMIC_O_TRUNC  (1 << 3)
-#define FUSE_CAP_EXPORT_SUPPORT  (1 << 4)
-#define FUSE_CAP_BIG_WRITES      (1 << 5)
-#define FUSE_CAP_DONT_MASK       (1 << 6)
-#define FUSE_CAP_SPLICE_WRITE    (1 << 7)
-#define FUSE_CAP_SPLICE_MOVE     (1 << 8)
-#define FUSE_CAP_SPLICE_READ     (1 << 9)
-#define FUSE_CAP_FLOCK_LOCKS     (1 << 10)
-#define FUSE_CAP_IOCTL_DIR       (1 << 11)
-#define FUSE_CAP_ASYNC_DIO       (1 << 15)
-#define FUSE_CAP_PARALLEL_DIROPS (1 << 18)
-#define FUSE_CAP_POSIX_ACL       (1 << 19)
-
+#define FUSE_CAP_ASYNC_READ        (1 << 0)
+#define FUSE_CAP_POSIX_LOCKS       (1 << 1)
+#define FUSE_CAP_ATOMIC_O_TRUNC    (1 << 3)
+#define FUSE_CAP_EXPORT_SUPPORT    (1 << 4)
+#define FUSE_CAP_BIG_WRITES        (1 << 5)
+#define FUSE_CAP_DONT_MASK         (1 << 6)
+#define FUSE_CAP_FLOCK_LOCKS       (1 << 10)
+#define FUSE_CAP_IOCTL_DIR         (1 << 11)
+#define FUSE_CAP_READDIR_PLUS      (1 << 13)
+#define FUSE_CAP_READDIR_PLUS_AUTO (1 << 14)
+#define FUSE_CAP_ASYNC_DIO         (1 << 15)
+#define FUSE_CAP_WRITEBACK_CACHE   (1 << 16)
+#define FUSE_CAP_PARALLEL_DIROPS   (1 << 18)
+#define FUSE_CAP_POSIX_ACL         (1 << 19)
+#define FUSE_CAP_CACHE_SYMLINKS    (1 << 20)
+#define FUSE_CAP_MAX_PAGES         (1 << 21)
+#define FUSE_CAP_SETXATTR_EXT      (1 << 22)
 
 /**
  * Ioctl flags
@@ -142,60 +147,61 @@ struct fuse_file_info {
  * value must usually be smaller than the indicated value.
  */
 struct fuse_conn_info {
-	/**
-	 * Major version of the protocol (read-only)
-	 */
-	unsigned proto_major;
+  /**
+   * Major version of the protocol (read-only)
+   */
+  unsigned proto_major;
 
-	/**
-	 * Minor version of the protocol (read-only)
-	 */
-	unsigned proto_minor;
+  /**
+   * Minor version of the protocol (read-only)
+   */
+  unsigned proto_minor;
 
-	/**
-	 * Is asynchronous read supported (read-write)
-	 */
-	unsigned async_read;
+  /**
+   * Maximum size of the write buffer
+   */
+  unsigned max_write;
 
-	/**
-	 * Maximum size of the write buffer
-	 */
-	unsigned max_write;
+  /**
+   * Maximum readahead
+   */
+  unsigned max_readahead;
 
-	/**
-	 * Maximum readahead
-	 */
-	unsigned max_readahead;
+  /**
+   * Capability flags, that the kernel supports
+   */
+  unsigned capable;
 
-	/**
-	 * Capability flags, that the kernel supports
-	 */
-	unsigned capable;
+  /**
+   * Capability flags, that the filesystem wants to enable
+   */
+  unsigned want;
 
-	/**
-	 * Capability flags, that the filesystem wants to enable
-	 */
-	unsigned want;
+  /**
+   * Maximum number of backgrounded requests
+   */
+  unsigned max_background;
 
-	/**
-	 * Maximum number of backgrounded requests
-	 */
-	unsigned max_background;
+  /**
+   * Kernel congestion threshold parameter
+   */
+  unsigned congestion_threshold;
 
-	/**
-	 * Kernel congestion threshold parameter
-	 */
-	unsigned congestion_threshold;
+  /**
+   * Max pages
+   */
+  uint16_t max_pages;
 
-	/**
-	 * For future use.
-	 */
-	unsigned reserved[23];
+  /**
+   * For future use.
+   */
+  unsigned reserved[22];
 };
 
 struct fuse_session;
 struct fuse_chan;
-struct fuse_pollhandle;
+struct fuse_pollhandle_t;
+typedef struct fuse_pollhandle_t fuse_pollhandle_t;
 
 /**
  * Create a FUSE mountpoint
@@ -207,7 +213,8 @@ struct fuse_pollhandle;
  * @param args argument vector
  * @return the communication channel on success, NULL on failure
  */
-struct fuse_chan *fuse_mount(const char *mountpoint, struct fuse_args *args);
+struct fuse_chan *fuse_mount(const char       *mountpoint,
+                             struct fuse_args *args);
 
 /**
  * Umount a FUSE mountpoint
@@ -224,7 +231,6 @@ void fuse_unmount(const char *mountpoint, struct fuse_chan *ch);
  *
  *   '-f'	     foreground
  *   '-d' '-odebug'  foreground, but keep the debug option
- *   '-s'	     single threaded
  *   '-h' '--help'   help
  *   '-ho'	     help without header
  *   '-ofsname=..'   file system name, if not present, then set to the program
@@ -234,12 +240,12 @@ void fuse_unmount(const char *mountpoint, struct fuse_chan *ch);
  *
  * @param args argument vector
  * @param mountpoint the returned mountpoint, should be freed after use
- * @param multithreaded set to 1 unless the '-s' option is present
  * @param foreground set to 1 if one of the relevant options is present
  * @return 0 on success, -1 on failure
  */
-int fuse_parse_cmdline(struct fuse_args *args, char **mountpoint,
-		       int *multithreaded, int *foreground);
+int fuse_parse_cmdline(struct fuse_args  *args,
+                       char             **mountpoint,
+                       int               *foreground);
 
 /**
  * Go into the background
@@ -261,7 +267,7 @@ int fuse_version(void);
  *
  * @param ph the poll handle
  */
-void fuse_pollhandle_destroy(struct fuse_pollhandle *ph);
+void fuse_pollhandle_destroy(fuse_pollhandle_t *ph);
 
 /* ----------------------------------------------------------- *
  * Data buffer						       *
@@ -271,73 +277,73 @@ void fuse_pollhandle_destroy(struct fuse_pollhandle *ph);
  * Buffer flags
  */
 enum fuse_buf_flags {
-	/**
-	 * Buffer contains a file descriptor
-	 *
-	 * If this flag is set, the .fd field is valid, otherwise the
-	 * .mem fields is valid.
-	 */
-	FUSE_BUF_IS_FD		= (1 << 1),
+  /**
+   * Buffer contains a file descriptor
+   *
+   * If this flag is set, the .fd field is valid, otherwise the
+   * .mem fields is valid.
+   */
+  FUSE_BUF_IS_FD		= (1 << 1),
 
-	/**
-	 * Seek on the file descriptor
-	 *
-	 * If this flag is set then the .pos field is valid and is
-	 * used to seek to the given offset before performing
-	 * operation on file descriptor.
-	 */
-	FUSE_BUF_FD_SEEK	= (1 << 2),
+  /**
+   * Seek on the file descriptor
+   *
+   * If this flag is set then the .pos field is valid and is
+   * used to seek to the given offset before performing
+   * operation on file descriptor.
+   */
+  FUSE_BUF_FD_SEEK	= (1 << 2),
 
-	/**
-	 * Retry operation on file descriptor
-	 *
-	 * If this flag is set then retry operation on file descriptor
-	 * until .size bytes have been copied or an error or EOF is
-	 * detected.
-	 */
-	FUSE_BUF_FD_RETRY	= (1 << 3),
+  /**
+   * Retry operation on file descriptor
+   *
+   * If this flag is set then retry operation on file descriptor
+   * until .size bytes have been copied or an error or EOF is
+   * detected.
+   */
+  FUSE_BUF_FD_RETRY	= (1 << 3),
 };
 
 /**
  * Buffer copy flags
  */
 enum fuse_buf_copy_flags {
-	/**
-	 * Don't use splice(2)
-	 *
-	 * Always fall back to using read and write instead of
-	 * splice(2) to copy data from one file descriptor to another.
-	 *
-	 * If this flag is not set, then only fall back if splice is
-	 * unavailable.
-	 */
-	FUSE_BUF_NO_SPLICE	= (1 << 1),
+  /**
+   * Don't use splice(2)
+   *
+   * Always fall back to using read and write instead of
+   * splice(2) to copy data from one file descriptor to another.
+   *
+   * If this flag is not set, then only fall back if splice is
+   * unavailable.
+   */
+  FUSE_BUF_NO_SPLICE	= (1 << 1),
 
-	/**
-	 * Force splice
-	 *
-	 * Always use splice(2) to copy data from one file descriptor
-	 * to another.  If splice is not available, return -EINVAL.
-	 */
-	FUSE_BUF_FORCE_SPLICE	= (1 << 2),
+  /**
+   * Force splice
+   *
+   * Always use splice(2) to copy data from one file descriptor
+   * to another.  If splice is not available, return -EINVAL.
+   */
+  FUSE_BUF_FORCE_SPLICE	= (1 << 2),
 
-	/**
-	 * Try to move data with splice.
-	 *
-	 * If splice is used, try to move pages from the source to the
-	 * destination instead of copying.  See documentation of
-	 * SPLICE_F_MOVE in splice(2) man page.
-	 */
-	FUSE_BUF_SPLICE_MOVE	= (1 << 3),
+  /**
+   * Try to move data with splice.
+   *
+   * If splice is used, try to move pages from the source to the
+   * destination instead of copying.  See documentation of
+   * SPLICE_F_MOVE in splice(2) man page.
+   */
+  FUSE_BUF_SPLICE_MOVE	= (1 << 3),
 
-	/**
-	 * Don't block on the pipe when copying data with splice
-	 *
-	 * Makes the operations on the pipe non-blocking (if the pipe
-	 * is full or empty).  See SPLICE_F_NONBLOCK in the splice(2)
-	 * man page.
-	 */
-	FUSE_BUF_SPLICE_NONBLOCK= (1 << 4),
+  /**
+   * Don't block on the pipe when copying data with splice
+   *
+   * Makes the operations on the pipe non-blocking (if the pipe
+   * is full or empty).  See SPLICE_F_NONBLOCK in the splice(2)
+   * man page.
+   */
+  FUSE_BUF_SPLICE_NONBLOCK= (1 << 4),
 };
 
 /**
@@ -347,36 +353,36 @@ enum fuse_buf_copy_flags {
  * be supplied as a memory pointer or as a file descriptor
  */
 struct fuse_buf {
-	/**
-	 * Size of data in bytes
-	 */
-	size_t size;
+  /**
+   * Size of data in bytes
+   */
+  size_t size;
 
-	/**
-	 * Buffer flags
-	 */
-	enum fuse_buf_flags flags;
+  /**
+   * Buffer flags
+   */
+  enum fuse_buf_flags flags;
 
-	/**
-	 * Memory pointer
-	 *
-	 * Used unless FUSE_BUF_IS_FD flag is set.
-	 */
-	void *mem;
+  /**
+   * Memory pointer
+   *
+   * Used unless FUSE_BUF_IS_FD flag is set.
+   */
+  void *mem;
 
-	/**
-	 * File descriptor
-	 *
-	 * Used if FUSE_BUF_IS_FD flag is set.
-	 */
-	int fd;
+  /**
+   * File descriptor
+   *
+   * Used if FUSE_BUF_IS_FD flag is set.
+   */
+  int fd;
 
-	/**
-	 * File position
-	 *
-	 * Used if FUSE_BUF_FD_SEEK flag is set.
-	 */
-	off_t pos;
+  /**
+   * File position
+   *
+   * Used if FUSE_BUF_FD_SEEK flag is set.
+   */
+  off_t pos;
 };
 
 /**
@@ -388,41 +394,41 @@ struct fuse_buf {
  * Allocate dynamically to add more than one buffer.
  */
 struct fuse_bufvec {
-	/**
-	 * Number of buffers in the array
-	 */
-	size_t count;
+  /**
+   * Number of buffers in the array
+   */
+  size_t count;
 
-	/**
-	 * Index of current buffer within the array
-	 */
-	size_t idx;
+  /**
+   * Index of current buffer within the array
+   */
+  size_t idx;
 
-	/**
-	 * Current offset within the current buffer
-	 */
-	size_t off;
+  /**
+   * Current offset within the current buffer
+   */
+  size_t off;
 
-	/**
-	 * Array of buffers
-	 */
-	struct fuse_buf buf[1];
+  /**
+   * Array of buffers
+   */
+  struct fuse_buf buf[1];
 };
 
 /* Initialize bufvec with a single buffer of given size */
-#define FUSE_BUFVEC_INIT(size__) 				\
-	((struct fuse_bufvec) {					\
-		/* .count= */ 1,				\
-		/* .idx =  */ 0,				\
-		/* .off =  */ 0,				\
-		/* .buf =  */ { /* [0] = */ {			\
-			/* .size =  */ (size__),		\
-			/* .flags = */ (enum fuse_buf_flags) 0,	\
-			/* .mem =   */ NULL,			\
-			/* .fd =    */ -1,			\
-			/* .pos =   */ 0,			\
-		} }						\
-	} )
+#define FUSE_BUFVEC_INIT(size__)                        \
+  ((struct fuse_bufvec) {                               \
+    /* .count= */ 1,                                    \
+      /* .idx =  */ 0,                                  \
+      /* .off =  */ 0,                                  \
+      /* .buf =  */ { /* [0] = */ {			\
+        /* .size =  */ (size__),                        \
+          /* .flags = */ (enum fuse_buf_flags) 0,	\
+          /* .mem =   */ NULL,                          \
+          /* .fd =    */ -1,                            \
+          /* .pos =   */ 0,                             \
+          } }						\
+  } )
 
 /**
  * Get total size of data in a fuse buffer vector
@@ -441,7 +447,7 @@ size_t fuse_buf_size(const struct fuse_bufvec *bufv);
  * @return actual number of bytes copied or -errno on error
  */
 ssize_t fuse_buf_copy(struct fuse_bufvec *dst, struct fuse_bufvec *src,
-		      enum fuse_buf_copy_flags flags);
+                      enum fuse_buf_copy_flags flags);
 
 /* ----------------------------------------------------------- *
  * Signal handling					       *
@@ -468,42 +474,6 @@ int fuse_set_signal_handlers(struct fuse_session *se);
  */
 void fuse_remove_signal_handlers(struct fuse_session *se);
 
-/* ----------------------------------------------------------- *
- * Compatibility stuff					       *
- * ----------------------------------------------------------- */
-
-#if FUSE_USE_VERSION < 26
-#    ifdef __FreeBSD__
-#	 if FUSE_USE_VERSION < 25
-#	     error On FreeBSD API version 25 or greater must be used
-#	 endif
-#    endif
-#    include "fuse_common_compat.h"
-#    undef FUSE_MINOR_VERSION
-#    undef fuse_main
-#    define fuse_unmount fuse_unmount_compat22
-#    if FUSE_USE_VERSION == 25
-#	 define FUSE_MINOR_VERSION 5
-#	 define fuse_mount fuse_mount_compat25
-#    elif FUSE_USE_VERSION == 24 || FUSE_USE_VERSION == 22
-#	 define FUSE_MINOR_VERSION 4
-#	 define fuse_mount fuse_mount_compat22
-#    elif FUSE_USE_VERSION == 21
-#	 define FUSE_MINOR_VERSION 1
-#	 define fuse_mount fuse_mount_compat22
-#    elif FUSE_USE_VERSION == 11
-#	 warning Compatibility with API version 11 is deprecated
-#	 undef FUSE_MAJOR_VERSION
-#	 define FUSE_MAJOR_VERSION 1
-#	 define FUSE_MINOR_VERSION 1
-#	 define fuse_mount fuse_mount_compat1
-#    else
-#	 error Compatibility with API version other than 21, 22, 24, 25 and 11 not supported
-#    endif
-#endif
-
-#ifdef __cplusplus
-}
-#endif
+EXTERN_C_END
 
 #endif /* _FUSE_COMMON_H_ */

libfuse/include/fuse_common_compat.h

@@ -1,26 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-/* these definitions provide source compatibility to prior versions.
-   Do not include this file directly! */
-
-struct fuse_file_info_compat {
-	int flags;
-	unsigned long fh;
-	int writepage;
-	unsigned int direct_io : 1;
-	unsigned int keep_cache : 1;
-};
-
-int fuse_mount_compat25(const char *mountpoint, struct fuse_args *args);
-
-int fuse_mount_compat22(const char *mountpoint, const char *opts);
-
-int fuse_mount_compat1(const char *mountpoint, const char *args[]);
-
-void fuse_unmount_compat22(const char *mountpoint);

libfuse/include/fuse_compat.h

@@ -1,201 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-/* these definitions provide source compatibility to prior versions.
-   Do not include this file directly! */
-
-struct fuse_operations_compat25 {
-	int (*getattr) (const char *, struct stat *);
-	int (*readlink) (const char *, char *, size_t);
-	int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t);
-	int (*mknod) (const char *, mode_t, dev_t);
-	int (*mkdir) (const char *, mode_t);
-	int (*unlink) (const char *);
-	int (*rmdir) (const char *);
-	int (*symlink) (const char *, const char *);
-	int (*rename) (const char *, const char *);
-	int (*link) (const char *, const char *);
-	int (*chmod) (const char *, mode_t);
-	int (*chown) (const char *, uid_t, gid_t);
-	int (*truncate) (const char *, off_t);
-	int (*utime) (const char *, struct utimbuf *);
-	int (*open) (const char *, struct fuse_file_info *);
-	int (*read) (const char *, char *, size_t, off_t,
-		     struct fuse_file_info *);
-	int (*write) (const char *, const char *, size_t, off_t,
-		      struct fuse_file_info *);
-	int (*statfs) (const char *, struct statvfs *);
-	int (*flush) (const char *, struct fuse_file_info *);
-	int (*release) (const char *, struct fuse_file_info *);
-	int (*fsync) (const char *, int, struct fuse_file_info *);
-	int (*setxattr) (const char *, const char *, const char *, size_t, int);
-	int (*getxattr) (const char *, const char *, char *, size_t);
-	int (*listxattr) (const char *, char *, size_t);
-	int (*removexattr) (const char *, const char *);
-	int (*opendir) (const char *, struct fuse_file_info *);
-	int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t,
-			struct fuse_file_info *);
-	int (*releasedir) (const char *, struct fuse_file_info *);
-	int (*fsyncdir) (const char *, int, struct fuse_file_info *);
-	void *(*init) (void);
-	void (*destroy) (void *);
-	int (*access) (const char *, int);
-	int (*create) (const char *, mode_t, struct fuse_file_info *);
-	int (*ftruncate) (const char *, off_t, struct fuse_file_info *);
-	int (*fgetattr) (const char *, struct stat *, struct fuse_file_info *);
-};
-
-struct fuse *fuse_new_compat25(int fd, struct fuse_args *args,
-			       const struct fuse_operations_compat25 *op,
-			       size_t op_size);
-
-int fuse_main_real_compat25(int argc, char *argv[],
-			    const struct fuse_operations_compat25 *op,
-			    size_t op_size);
-
-struct fuse *fuse_setup_compat25(int argc, char *argv[],
-				 const struct fuse_operations_compat25 *op,
-				 size_t op_size, char **mountpoint,
-				 int *multithreaded, int *fd);
-
-void fuse_teardown_compat22(struct fuse *fuse, int fd, char *mountpoint);
-
-#if !defined(__FreeBSD__) && !defined(__NetBSD__)
-#include <sys/statfs.h>
-
-struct fuse_operations_compat22 {
-	int (*getattr) (const char *, struct stat *);
-	int (*readlink) (const char *, char *, size_t);
-	int (*getdir) (const char *, fuse_dirh_t, fuse_dirfil_t);
-	int (*mknod) (const char *, mode_t, dev_t);
-	int (*mkdir) (const char *, mode_t);
-	int (*unlink) (const char *);
-	int (*rmdir) (const char *);
-	int (*symlink) (const char *, const char *);
-	int (*rename) (const char *, const char *);
-	int (*link) (const char *, const char *);
-	int (*chmod) (const char *, mode_t);
-	int (*chown) (const char *, uid_t, gid_t);
-	int (*truncate) (const char *, off_t);
-	int (*utime) (const char *, struct utimbuf *);
-	int (*open) (const char *, struct fuse_file_info_compat *);
-	int (*read) (const char *, char *, size_t, off_t,
-		     struct fuse_file_info_compat *);
-	int (*write) (const char *, const char *, size_t, off_t,
-		      struct fuse_file_info_compat *);
-	int (*statfs) (const char *, struct statfs *);
-	int (*flush) (const char *, struct fuse_file_info_compat *);
-	int (*release) (const char *, struct fuse_file_info_compat *);
-	int (*fsync) (const char *, int, struct fuse_file_info_compat *);
-	int (*setxattr) (const char *, const char *, const char *, size_t, int);
-	int (*getxattr) (const char *, const char *, char *, size_t);
-	int (*listxattr) (const char *, char *, size_t);
-	int (*removexattr) (const char *, const char *);
-	int (*opendir) (const char *, struct fuse_file_info_compat *);
-	int (*readdir) (const char *, void *, fuse_fill_dir_t, off_t,
-			struct fuse_file_info_compat *);
-	int (*releasedir) (const char *, struct fuse_file_info_compat *);
-	int (*fsyncdir) (const char *, int, struct fuse_file_info_compat *);
-	void *(*init) (void);
-	void (*destroy) (void *);
-};
-
-struct fuse *fuse_new_compat22(int fd, const char *opts,
-			       const struct fuse_operations_compat22 *op,
-			       size_t op_size);
-
-struct fuse *fuse_setup_compat22(int argc, char *argv[],
-				 const struct fuse_operations_compat22 *op,
-				 size_t op_size, char **mountpoint,
-				 int *multithreaded, int *fd);
-
-int fuse_main_real_compat22(int argc, char *argv[],
-			    const struct fuse_operations_compat22 *op,
-			    size_t op_size);
-
-typedef int (*fuse_dirfil_t_compat) (fuse_dirh_t h, const char *name, int type);
-struct fuse_operations_compat2 {
-	int (*getattr)	   (const char *, struct stat *);
-	int (*readlink)	   (const char *, char *, size_t);
-	int (*getdir)	   (const char *, fuse_dirh_t, fuse_dirfil_t_compat);
-	int (*mknod)	   (const char *, mode_t, dev_t);
-	int (*mkdir)	   (const char *, mode_t);
-	int (*unlink)	   (const char *);
-	int (*rmdir)	   (const char *);
-	int (*symlink)	   (const char *, const char *);
-	int (*rename)	   (const char *, const char *);
-	int (*link)	   (const char *, const char *);
-	int (*chmod)	   (const char *, mode_t);
-	int (*chown)	   (const char *, uid_t, gid_t);
-	int (*truncate)	   (const char *, off_t);
-	int (*utime)	   (const char *, struct utimbuf *);
-	int (*open)	   (const char *, int);
-	int (*read)	   (const char *, char *, size_t, off_t);
-	int (*write)	   (const char *, const char *, size_t, off_t);
-	int (*statfs)	   (const char *, struct statfs *);
-	int (*flush)	   (const char *);
-	int (*release)	   (const char *, int);
-	int (*fsync)	   (const char *, int);
-	int (*setxattr)	   (const char *, const char *, const char *,
-			    size_t, int);
-	int (*getxattr)	   (const char *, const char *, char *, size_t);
-	int (*listxattr)   (const char *, char *, size_t);
-	int (*removexattr) (const char *, const char *);
-};
-
-int fuse_main_compat2(int argc, char *argv[],
-		      const struct fuse_operations_compat2 *op);
-
-struct fuse *fuse_new_compat2(int fd, const char *opts,
-			      const struct fuse_operations_compat2 *op);
-
-struct fuse *fuse_setup_compat2(int argc, char *argv[],
-				const struct fuse_operations_compat2 *op,
-				char **mountpoint, int *multithreaded, int *fd);
-
-struct fuse_statfs_compat1 {
-	long block_size;
-	long blocks;
-	long blocks_free;
-	long files;
-	long files_free;
-	long namelen;
-};
-
-struct fuse_operations_compat1 {
-	int (*getattr)	(const char *, struct stat *);
-	int (*readlink) (const char *, char *, size_t);
-	int (*getdir)	(const char *, fuse_dirh_t, fuse_dirfil_t_compat);
-	int (*mknod)	(const char *, mode_t, dev_t);
-	int (*mkdir)	(const char *, mode_t);
-	int (*unlink)	(const char *);
-	int (*rmdir)	(const char *);
-	int (*symlink)	(const char *, const char *);
-	int (*rename)	(const char *, const char *);
-	int (*link)	(const char *, const char *);
-	int (*chmod)	(const char *, mode_t);
-	int (*chown)	(const char *, uid_t, gid_t);
-	int (*truncate) (const char *, off_t);
-	int (*utime)	(const char *, struct utimbuf *);
-	int (*open)	(const char *, int);
-	int (*read)	(const char *, char *, size_t, off_t);
-	int (*write)	(const char *, const char *, size_t, off_t);
-	int (*statfs)	(struct fuse_statfs_compat1 *);
-	int (*release)	(const char *, int);
-	int (*fsync)	(const char *, int);
-};
-
-#define FUSE_DEBUG_COMPAT1	 (1 << 1)
-
-struct fuse *fuse_new_compat1(int fd, int flags,
-			      const struct fuse_operations_compat1 *op);
-
-void fuse_main_compat1(int argc, char *argv[],
-		       const struct fuse_operations_compat1 *op);
-
-#endif /* __FreeBSD__ || __NetBSD__ */

libfuse/include/fuse_dirent.h

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include <stdint.h>
+
+typedef struct fuse_dirent_s fuse_dirent_t;
+struct fuse_dirent_s
+{
+  uint64_t ino;
+  uint64_t off;
+  uint32_t namelen;
+  uint32_t type;
+  char     name[];
+};

libfuse/include/fuse_direntplus.h

@@ -0,0 +1,31 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "fuse_attr.h"
+#include "fuse_dirent.h"
+#include "fuse_entry.h"
+
+typedef struct fuse_direntplus_s fuse_direntplus_t;
+struct fuse_direntplus_s
+{
+  fuse_entry_t  entry;
+  fuse_attr_t   attr;
+  fuse_dirent_t dirent;
+};

libfuse/include/fuse_dirents.h

@@ -0,0 +1,80 @@
+/*
+  ISC License
+
+  Copyright (c) 2019, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "extern_c.h"
+
+EXTERN_C_BEGIN
+
+#include "kvec.h"
+#include "fuse_dirent.h"
+#include "fuse_direntplus.h"
+#include "fuse_entry.h"
+#include "linux_dirent64.h"
+
+#include <dirent.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+enum fuse_dirents_type_e
+{
+  UNSET = 0,
+  NORMAL,
+  PLUS
+};
+typedef enum fuse_dirents_type_e fuse_dirents_type_t;
+
+typedef struct fuse_dirents_t fuse_dirents_t;
+struct fuse_dirents_t
+{
+  kvec_t(char)        data;
+  kvec_t(uint32_t)    offs;
+  fuse_dirents_type_t type;
+};
+
+int  fuse_dirents_init(fuse_dirents_t *d);
+void fuse_dirents_free(fuse_dirents_t *d);
+void fuse_dirents_reset(fuse_dirents_t *d);
+
+int  fuse_dirents_add(fuse_dirents_t      *d,
+                      const struct dirent *de,
+                      const uint64_t       namelen);
+int  fuse_dirents_add_plus(fuse_dirents_t      *d,
+                           const struct dirent *de,
+                           const uint64_t       namelen,
+                           const fuse_entry_t  *entry,
+                           const struct stat   *st);
+int  fuse_dirents_add_linux(fuse_dirents_t              *d,
+                            const struct linux_dirent64 *de,
+                            const uint64_t               namelen);
+int  fuse_dirents_add_linux_plus(fuse_dirents_t              *d,
+                                 const struct linux_dirent64 *de,
+                                 const uint64_t               namelen,
+                                 const fuse_entry_t          *entry,
+                                 const struct stat           *st);
+
+void *fuse_dirents_find(fuse_dirents_t *d,
+                        const uint64_t  ino);
+
+int fuse_dirents_convert_plus2normal(fuse_dirents_t *d);
+
+EXTERN_C_END

libfuse/include/fuse_entry.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct fuse_entry_s fuse_entry_t;
+struct fuse_entry_s
+{
+  uint64_t nodeid;
+  uint64_t generation;
+  uint64_t entry_valid;
+  uint64_t attr_valid;
+  uint32_t entry_valid_nsec;
+  uint32_t attr_valid_nsec;
+};

libfuse/include/fuse_kernel.h

@@ -38,12 +38,50 @@
  *
  * Protocol changelog:
  *
+ * 7.1:
+ *  - add the following messages:
+ *      FUSE_SETATTR, FUSE_SYMLINK, FUSE_MKNOD, FUSE_MKDIR, FUSE_UNLINK,
+ *      FUSE_RMDIR, FUSE_RENAME, FUSE_LINK, FUSE_OPEN, FUSE_READ, FUSE_WRITE,
+ *      FUSE_RELEASE, FUSE_FSYNC, FUSE_FLUSH, FUSE_SETXATTR, FUSE_GETXATTR,
+ *      FUSE_LISTXATTR, FUSE_REMOVEXATTR, FUSE_OPENDIR, FUSE_READDIR,
+ *      FUSE_RELEASEDIR
+ *  - add padding to messages to accommodate 32-bit servers on 64-bit kernels
+ *
+ * 7.2:
+ *  - add FOPEN_DIRECT_IO and FOPEN_KEEP_CACHE flags
+ *  - add FUSE_FSYNCDIR message
+ *
+ * 7.3:
+ *  - add FUSE_ACCESS message
+ *  - add FUSE_CREATE message
+ *  - add filehandle to fuse_setattr_in
+ *
+ * 7.4:
+ *  - add frsize to fuse_kstatfs
+ *  - clean up request size limit checking
+ *
+ * 7.5:
+ *  - add flags and max_write to fuse_init_out
+ *
+ * 7.6:
+ *  - add max_readahead to fuse_init_in and fuse_init_out
+ *
+ * 7.7:
+ *  - add FUSE_INTERRUPT message
+ *  - add POSIX file lock support
+ *
+ * 7.8:
+ *  - add lock_owner and flags fields to fuse_release_in
+ *  - add FUSE_BMAP message
+ *  - add FUSE_DESTROY message
+ *
  * 7.9:
  *  - new fuse_getattr_in input argument of GETATTR
  *  - add lk_flags in fuse_lk_in
  *  - add lock_owner field to fuse_setattr_in, fuse_read_in and fuse_write_in
  *  - add blksize field to fuse_attr
  *  - add file flags field to fuse_read_in and fuse_write_in
+ *  - Add ATIME_NOW and MTIME_NOW flags to fuse_setattr_in
  *
  * 7.10
  *  - add nonseekable open flag
@@ -54,7 +92,7 @@
  *  - add POLL message and NOTIFY_POLL notification
  *
  * 7.12
- *  - add umask flag to input argument of open, mknod and mkdir
+ *  - add umask flag to input argument of create, mknod and mkdir
  *  - add notification messages for invalidation of inodes and
  *    directory entries
  *
@@ -119,6 +157,46 @@
  *
  *  7.28
  *  - add FUSE_COPY_FILE_RANGE
+ *  - add FOPEN_CACHE_DIR
+ *  - add FUSE_MAX_PAGES, add max_pages to init_out
+ *  - add FUSE_CACHE_SYMLINKS
+ *
+ *  7.29
+ *  - add FUSE_NO_OPENDIR_SUPPORT flag
+ *
+ *  7.30
+ *  - add FUSE_EXPLICIT_INVAL_DATA
+ *  - add FUSE_IOCTL_COMPAT_X32
+ *
+ *  7.31
+ *  - add FUSE_WRITE_KILL_PRIV flag
+ *  - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
+ *  - add map_alignment to fuse_init_out, add FUSE_MAP_ALIGNMENT flag
+ *
+ *  7.32
+ *  - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
+ *
+ *  7.33
+ *  - add FUSE_HANDLE_KILLPRIV_V2, FUSE_WRITE_KILL_SUIDGID, FATTR_KILL_SUIDGID
+ *  - add FUSE_OPEN_KILL_SUIDGID
+ *  - extend fuse_setxattr_in, add FUSE_SETXATTR_EXT
+ *  - add FUSE_SETXATTR_ACL_KILL_SGID
+ *
+ *  7.34
+ *  - add FUSE_SYNCFS
+ *
+ *  7.35
+ *  - add FOPEN_NOFLUSH
+ *
+ *  7.36
+ *  - extend fuse_init_in with reserved fields, add FUSE_INIT_EXT init flag
+ *  - add flags2 to fuse_init_in and fuse_init_out
+ *  - add FUSE_SECURITY_CTX init flag
+ *  - add security context to create, mkdir, symlink, and mknod requests
+ *  - add FUSE_HAS_INODE_DAX, FUSE_ATTR_DAX
+ *
+ *  7.37
+ *  - add FUSE_TMPFILE
  */
 
 #ifndef _LINUX_FUSE_H
@@ -154,7 +232,7 @@
 #define FUSE_KERNEL_VERSION 7
 
 /** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 27
+#define FUSE_KERNEL_MINOR_VERSION 37
 
 /** The node ID of the root inode */
 #define FUSE_ROOT_ID 1
@@ -178,7 +256,7 @@ struct fuse_attr {
 	uint32_t	gid;
 	uint32_t	rdev;
 	uint32_t	blksize;
-	uint32_t	padding;
+	uint32_t	flags;
 };
 
 struct fuse_kstatfs {
@@ -204,17 +282,18 @@ struct fuse_file_lock {
 /**
  * Bitmasks for fuse_setattr_in.valid
  */
-#define FATTR_MODE	(1 << 0)
-#define FATTR_UID	(1 << 1)
-#define FATTR_GID	(1 << 2)
-#define FATTR_SIZE	(1 << 3)
-#define FATTR_ATIME	(1 << 4)
-#define FATTR_MTIME	(1 << 5)
-#define FATTR_FH	(1 << 6)
-#define FATTR_ATIME_NOW	(1 << 7)
-#define FATTR_MTIME_NOW	(1 << 8)
-#define FATTR_LOCKOWNER	(1 << 9)
-#define FATTR_CTIME	(1 << 10)
+#define FATTR_MODE         (1 << 0)
+#define FATTR_UID          (1 << 1)
+#define FATTR_GID          (1 << 2)
+#define FATTR_SIZE         (1 << 3)
+#define FATTR_ATIME        (1 << 4)
+#define FATTR_MTIME        (1 << 5)
+#define FATTR_FH           (1 << 6)
+#define FATTR_ATIME_NOW    (1 << 7)
+#define FATTR_MTIME_NOW    (1 << 8)
+#define FATTR_LOCKOWNER    (1 << 9)
+#define FATTR_CTIME        (1 << 10)
+#define FATTR_KILL_SUIDGID (1 << 11)
 
 /**
  * Flags returned by the OPEN request
@@ -222,10 +301,16 @@ struct fuse_file_lock {
  * FOPEN_DIRECT_IO: bypass page cache for this open file
  * FOPEN_KEEP_CACHE: don't invalidate the data cache on open
  * FOPEN_NONSEEKABLE: the file is not seekable
+ * FOPEN_CACHE_DIR: allow caching this directory
+ * FOPEN_STREAM: the file is stream-like (no file position at all)
+ * FOPEN_NOFLUSH: don't flush data cache on close (unless FUSE_WRITEBACK_CACHE)
  */
 #define FOPEN_DIRECT_IO		(1 << 0)
 #define FOPEN_KEEP_CACHE	(1 << 1)
 #define FOPEN_NONSEEKABLE	(1 << 2)
+#define FOPEN_CACHE_DIR		(1 << 3)
+#define FOPEN_STREAM		(1 << 4)
+#define FOPEN_NOFLUSH		(1 << 5)
 
 /**
  * INIT request/reply flags
@@ -252,6 +337,25 @@ struct fuse_file_lock {
  * FUSE_HANDLE_KILLPRIV: fs handles killing suid/sgid/cap on write/chown/trunc
  * FUSE_POSIX_ACL: filesystem supports posix acls
  * FUSE_ABORT_ERROR: reading the device after abort returns ECONNABORTED
+ * FUSE_MAX_PAGES: init_out.max_pages contains the max number of req pages
+ * FUSE_CACHE_SYMLINKS: cache READLINK responses
+ * FUSE_NO_OPENDIR_SUPPORT: kernel supports zero-message opendir
+ * FUSE_EXPLICIT_INVAL_DATA: only invalidate cached pages on explicit request
+ * FUSE_MAP_ALIGNMENT: init_out.map_alignment contains log2(byte alignment) for
+ *		       foffset and moffset fields in struct
+ *		       fuse_setupmapping_out and fuse_removemapping_one.
+ * FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
+ * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
+ *			Upon write/truncate suid/sgid is only killed if caller
+ *			does not have CAP_FSETID. Additionally upon
+ *			write/truncate sgid is killed only if file has group
+ *			execute permission. (Same as Linux VFS behavior).
+ * FUSE_SETXATTR_EXT:	Server supports extended struct fuse_setxattr_in
+ * FUSE_INIT_EXT: extended fuse_init_in request
+ * FUSE_INIT_RESERVED: reserved, do not use
+ * FUSE_SECURITY_CTX:	add security context to create, mkdir, symlink, and
+ *			mknod
+ * FUSE_HAS_INODE_DAX:  use per inode DAX
  */
 #define FUSE_ASYNC_READ		(1 << 0)
 #define FUSE_POSIX_LOCKS	(1 << 1)
@@ -275,6 +379,19 @@ struct fuse_file_lock {
 #define FUSE_HANDLE_KILLPRIV	(1 << 19)
 #define FUSE_POSIX_ACL		(1 << 20)
 #define FUSE_ABORT_ERROR	(1 << 21)
+#define FUSE_MAX_PAGES		(1 << 22)
+#define FUSE_CACHE_SYMLINKS	(1 << 23)
+#define FUSE_NO_OPENDIR_SUPPORT (1 << 24)
+#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
+#define FUSE_MAP_ALIGNMENT	(1 << 26)
+#define FUSE_SUBMOUNTS		(1 << 27)
+#define FUSE_HANDLE_KILLPRIV_V2	(1 << 28)
+#define FUSE_SETXATTR_EXT	(1 << 29)
+#define FUSE_INIT_EXT		(1 << 30)
+#define FUSE_INIT_RESERVED	(1 << 31)
+/* bits 32..63 get shifted down 32 bits into the flags2 field */
+#define FUSE_SECURITY_CTX	(1ULL << 32)
+#define FUSE_HAS_INODE_DAX	(1ULL << 33)
 
 /**
  * CUSE INIT request/reply flags
@@ -304,9 +421,14 @@ struct fuse_file_lock {
  *
  * FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
  * FUSE_WRITE_LOCKOWNER: lock_owner field is valid
+ * FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
  */
 #define FUSE_WRITE_CACHE	(1 << 0)
 #define FUSE_WRITE_LOCKOWNER	(1 << 1)
+#define FUSE_WRITE_KILL_SUIDGID (1 << 2)
+
+/* Obsolete alias; this flag implies killing suid/sgid only. */
+#define FUSE_WRITE_KILL_PRIV	FUSE_WRITE_KILL_SUIDGID
 
 /**
  * Read flags
@@ -321,6 +443,7 @@ struct fuse_file_lock {
  * FUSE_IOCTL_RETRY: retry with new iovecs
  * FUSE_IOCTL_32BIT: 32bit ioctl
  * FUSE_IOCTL_DIR: is a directory
+ * FUSE_IOCTL_COMPAT_X32: x32 compat ioctl on 64bit machine (64bit time_t)
  *
  * FUSE_IOCTL_MAX_IOV: maximum of in_iovecs + out_iovecs
  */
@@ -329,6 +452,7 @@ struct fuse_file_lock {
 #define FUSE_IOCTL_RETRY	(1 << 2)
 #define FUSE_IOCTL_32BIT	(1 << 3)
 #define FUSE_IOCTL_DIR		(1 << 4)
+#define FUSE_IOCTL_COMPAT_X32	(1 << 5)
 
 #define FUSE_IOCTL_MAX_IOV	256
 
@@ -339,6 +463,34 @@ struct fuse_file_lock {
  */
 #define FUSE_POLL_SCHEDULE_NOTIFY (1 << 0)
 
+/**
+ * Fsync flags
+ *
+ * FUSE_FSYNC_FDATASYNC: Sync data only, not metadata
+ */
+#define FUSE_FSYNC_FDATASYNC	(1 << 0)
+
+/**
+ * fuse_attr flags
+ *
+ * FUSE_ATTR_SUBMOUNT: Object is a submount root
+ * FUSE_ATTR_DAX: Enable DAX for this file in per inode DAX mode
+ */
+#define FUSE_ATTR_SUBMOUNT      (1 << 0)
+#define FUSE_ATTR_DAX		(1 << 1)
+
+/**
+ * Open flags
+ * FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
+ */
+#define FUSE_OPEN_KILL_SUIDGID	(1 << 0)
+
+/**
+ * setxattr flags
+ * FUSE_SETXATTR_ACL_KILL_SGID: Clear SGID when system.posix_acl_access is set
+ */
+#define FUSE_SETXATTR_ACL_KILL_SGID	(1 << 0)
+
 enum fuse_opcode {
 	FUSE_LOOKUP		= 1,
 	FUSE_FORGET		= 2,  /* no reply */
@@ -385,9 +537,17 @@ enum fuse_opcode {
 	FUSE_RENAME2		= 45,
 	FUSE_LSEEK		= 46,
 	FUSE_COPY_FILE_RANGE	= 47,
+	FUSE_SETUPMAPPING	= 48,
+	FUSE_REMOVEMAPPING	= 49,
+	FUSE_SYNCFS		= 50,
+	FUSE_TMPFILE		= 51,
 
 	/* CUSE specific operations */
 	CUSE_INIT		= 4096,
+
+	/* Reserved opcodes: helpful to detect structure endian-ness */
+	CUSE_INIT_BSWAP_RESERVED	= 1048576,	/* CUSE_INIT << 8 */
+	FUSE_INIT_BSWAP_RESERVED	= 436207616,	/* FUSE_INIT << 24 */
 };
 
 enum fuse_notify_code {
@@ -494,14 +654,14 @@ struct fuse_setattr_in {
 
 struct fuse_open_in {
 	uint32_t	flags;
-	uint32_t	unused;
+	uint32_t	open_flags;	/* FUSE_OPEN_... */
 };
 
 struct fuse_create_in {
 	uint32_t	flags;
 	uint32_t	mode;
 	uint32_t	umask;
-	uint32_t	padding;
+	uint32_t	open_flags;	/* FUSE_OPEN_... */
 };
 
 struct fuse_open_out {
@@ -563,9 +723,13 @@ struct fuse_fsync_in {
 	uint32_t	padding;
 };
 
+#define FUSE_COMPAT_SETXATTR_IN_SIZE 8
+
 struct fuse_setxattr_in {
 	uint32_t	size;
 	uint32_t	flags;
+	uint32_t	setxattr_flags;
+	uint32_t	padding;
 };
 
 struct fuse_getxattr_in {
@@ -600,6 +764,8 @@ struct fuse_init_in {
 	uint32_t	minor;
 	uint32_t	max_readahead;
 	uint32_t	flags;
+	uint32_t	flags2;
+	uint32_t	unused[11];
 };
 
 #define FUSE_COMPAT_INIT_OUT_SIZE 8
@@ -614,7 +780,10 @@ struct fuse_init_out {
 	uint16_t	congestion_threshold;
 	uint32_t	max_write;
 	uint32_t	time_gran;
-	uint32_t	unused[9];
+	uint16_t	max_pages;
+	uint16_t	map_alignment;
+	uint32_t	flags2;
+	uint32_t	unused[7];
 };
 
 #define CUSE_INIT_INFO_MAX 4096
@@ -722,9 +891,12 @@ struct fuse_dirent {
 	char name[];
 };
 
-#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
-#define FUSE_DIRENT_ALIGN(x) \
+/* Align variable length records to 64bit boundary */
+#define FUSE_REC_ALIGN(x) \
 	(((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))
+
+#define FUSE_NAME_OFFSET offsetof(struct fuse_dirent, name)
+#define FUSE_DIRENT_ALIGN(x) FUSE_REC_ALIGN(x)
 #define FUSE_DIRENT_SIZE(d) \
 	FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + (d)->namelen)
 
@@ -783,7 +955,8 @@ struct fuse_notify_retrieve_in {
 };
 
 /* Device ioctls: */
-#define FUSE_DEV_IOC_CLONE	_IOR(229, 0, uint32_t)
+#define FUSE_DEV_IOC_MAGIC		229
+#define FUSE_DEV_IOC_CLONE		_IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
 
 struct fuse_lseek_in {
 	uint64_t	fh;
@@ -806,4 +979,60 @@ struct fuse_copy_file_range_in {
 	uint64_t	flags;
 };
 
+#define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
+#define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
+struct fuse_setupmapping_in {
+	/* An already open handle */
+	uint64_t	fh;
+	/* Offset into the file to start the mapping */
+	uint64_t	foffset;
+	/* Length of mapping required */
+	uint64_t	len;
+	/* Flags, FUSE_SETUPMAPPING_FLAG_* */
+	uint64_t	flags;
+	/* Offset in Memory Window */
+	uint64_t	moffset;
+};
+
+struct fuse_removemapping_in {
+	/* number of fuse_removemapping_one follows */
+	uint32_t        count;
+};
+
+struct fuse_removemapping_one {
+	/* Offset into the dax window start the unmapping */
+	uint64_t        moffset;
+	/* Length of mapping required */
+	uint64_t	len;
+};
+
+#define FUSE_REMOVEMAPPING_MAX_ENTRY   \
+		(PAGE_SIZE / sizeof(struct fuse_removemapping_one))
+
+struct fuse_syncfs_in {
+	uint64_t	padding;
+};
+
+/*
+ * For each security context, send fuse_secctx with size of security context
+ * fuse_secctx will be followed by security context name and this in turn
+ * will be followed by actual context label.
+ * fuse_secctx, name, context
+ */
+struct fuse_secctx {
+	uint32_t	size;
+	uint32_t	padding;
+};
+
+/*
+ * Contains the information about how many fuse_secctx structures are being
+ * sent and what's the total size of all security contexts (including
+ * size of fuse_secctx_header).
+ *
+ */
+struct fuse_secctx_header {
+	uint32_t	size;
+	uint32_t	nr_secctx;
+};
+
 #endif /* _LINUX_FUSE_H */

libfuse/include/fuse_lowlevel_compat.h

@@ -1,155 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-/* these definitions provide source compatibility to prior versions.
-   Do not include this file directly! */
-
-struct fuse_lowlevel_ops_compat25 {
-	void (*init) (void *userdata);
-	void (*destroy) (void *userdata);
-	void (*lookup) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*forget) (fuse_req_t req, fuse_ino_t ino, unsigned long nlookup);
-	void (*getattr) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-	void (*setattr) (fuse_req_t req, fuse_ino_t ino, struct stat *attr,
-			 int to_set, struct fuse_file_info *fi);
-	void (*readlink) (fuse_req_t req, fuse_ino_t ino);
-	void (*mknod) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode, dev_t rdev);
-	void (*mkdir) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode);
-	void (*unlink) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*rmdir) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*symlink) (fuse_req_t req, const char *link, fuse_ino_t parent,
-			 const char *name);
-	void (*rename) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			fuse_ino_t newparent, const char *newname);
-	void (*link) (fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
-		      const char *newname);
-	void (*open) (fuse_req_t req, fuse_ino_t ino,
-		      struct fuse_file_info *fi);
-	void (*read) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-		      struct fuse_file_info *fi);
-	void (*write) (fuse_req_t req, fuse_ino_t ino, const char *buf,
-		       size_t size, off_t off, struct fuse_file_info *fi);
-	void (*flush) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info *fi);
-	void (*release) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-	void (*fsync) (fuse_req_t req, fuse_ino_t ino, int datasync,
-		       struct fuse_file_info *fi);
-	void (*opendir) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info *fi);
-	void (*readdir) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-			 struct fuse_file_info *fi);
-	void (*releasedir) (fuse_req_t req, fuse_ino_t ino,
-			    struct fuse_file_info *fi);
-	void (*fsyncdir) (fuse_req_t req, fuse_ino_t ino, int datasync,
-			  struct fuse_file_info *fi);
-	void (*statfs) (fuse_req_t req);
-	void (*setxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  const char *value, size_t size, int flags);
-	void (*getxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  size_t size);
-	void (*listxattr) (fuse_req_t req, fuse_ino_t ino, size_t size);
-	void (*removexattr) (fuse_req_t req, fuse_ino_t ino, const char *name);
-	void (*access) (fuse_req_t req, fuse_ino_t ino, int mask);
-	void (*create) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			mode_t mode, struct fuse_file_info *fi);
-};
-
-struct fuse_session *fuse_lowlevel_new_compat25(struct fuse_args *args,
-				const struct fuse_lowlevel_ops_compat25 *op,
-				size_t op_size, void *userdata);
-
-size_t fuse_dirent_size(size_t namelen);
-
-char *fuse_add_dirent(char *buf, const char *name, const struct stat *stbuf,
-		      off_t off);
-
-#if !defined(__FreeBSD__) && !defined(__NetBSD__)
-
-#include <sys/statfs.h>
-
-struct fuse_lowlevel_ops_compat {
-	void (*init) (void *userdata);
-	void (*destroy) (void *userdata);
-	void (*lookup) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*forget) (fuse_req_t req, fuse_ino_t ino, unsigned long nlookup);
-	void (*getattr) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info_compat *fi);
-	void (*setattr) (fuse_req_t req, fuse_ino_t ino, struct stat *attr,
-			 int to_set, struct fuse_file_info_compat *fi);
-	void (*readlink) (fuse_req_t req, fuse_ino_t ino);
-	void (*mknod) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode, dev_t rdev);
-	void (*mkdir) (fuse_req_t req, fuse_ino_t parent, const char *name,
-		       mode_t mode);
-	void (*unlink) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*rmdir) (fuse_req_t req, fuse_ino_t parent, const char *name);
-	void (*symlink) (fuse_req_t req, const char *link, fuse_ino_t parent,
-			 const char *name);
-	void (*rename) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			fuse_ino_t newparent, const char *newname);
-	void (*link) (fuse_req_t req, fuse_ino_t ino, fuse_ino_t newparent,
-		      const char *newname);
-	void (*open) (fuse_req_t req, fuse_ino_t ino,
-		      struct fuse_file_info_compat *fi);
-	void (*read) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-		      struct fuse_file_info_compat *fi);
-	void (*write) (fuse_req_t req, fuse_ino_t ino, const char *buf,
-		       size_t size, off_t off, struct fuse_file_info_compat *fi);
-	void (*flush) (fuse_req_t req, fuse_ino_t ino,
-		       struct fuse_file_info_compat *fi);
-	void (*release) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info_compat *fi);
-	void (*fsync) (fuse_req_t req, fuse_ino_t ino, int datasync,
-		       struct fuse_file_info_compat *fi);
-	void (*opendir) (fuse_req_t req, fuse_ino_t ino,
-			 struct fuse_file_info_compat *fi);
-	void (*readdir) (fuse_req_t req, fuse_ino_t ino, size_t size, off_t off,
-			 struct fuse_file_info_compat *fi);
-	void (*releasedir) (fuse_req_t req, fuse_ino_t ino,
-			    struct fuse_file_info_compat *fi);
-	void (*fsyncdir) (fuse_req_t req, fuse_ino_t ino, int datasync,
-			  struct fuse_file_info_compat *fi);
-	void (*statfs) (fuse_req_t req);
-	void (*setxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  const char *value, size_t size, int flags);
-	void (*getxattr) (fuse_req_t req, fuse_ino_t ino, const char *name,
-			  size_t size);
-	void (*listxattr) (fuse_req_t req, fuse_ino_t ino, size_t size);
-	void (*removexattr) (fuse_req_t req, fuse_ino_t ino, const char *name);
-	void (*access) (fuse_req_t req, fuse_ino_t ino, int mask);
-	void (*create) (fuse_req_t req, fuse_ino_t parent, const char *name,
-			mode_t mode, struct fuse_file_info_compat *fi);
-};
-
-int fuse_reply_statfs_compat(fuse_req_t req, const struct statfs *stbuf);
-
-int fuse_reply_open_compat(fuse_req_t req,
-			   const struct fuse_file_info_compat *fi);
-
-struct fuse_session *fuse_lowlevel_new_compat(const char *opts,
-				const struct fuse_lowlevel_ops_compat *op,
-				size_t op_size, void *userdata);
-
-#endif /* __FreeBSD__ || __NetBSD__ */
-
-struct fuse_chan_ops_compat24 {
-	int (*receive)(struct fuse_chan *ch, char *buf, size_t size);
-	int (*send)(struct fuse_chan *ch, const struct iovec iov[],
-		    size_t count);
-	void (*destroy)(struct fuse_chan *ch);
-};
-
-struct fuse_chan *fuse_chan_new_compat24(struct fuse_chan_ops_compat24 *op,
-					 int fd, size_t bufsize, void *data);
-
-int fuse_chan_receive(struct fuse_chan *ch, char *buf, size_t size);
-struct fuse_chan *fuse_kern_chan_new(int fd);

libfuse/include/fuse_msgbuf.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct fuse_msgbuf_t fuse_msgbuf_t;
+struct fuse_msgbuf_t
+{
+  char     *mem;
+  uint32_t  size;
+  uint32_t  used;
+};

libfuse/include/fuse_opt.h

@@ -9,14 +9,14 @@
 #ifndef _FUSE_OPT_H_
 #define _FUSE_OPT_H_
 
+#include "extern_c.h"
+
 /** @file
  *
  * This file defines the option parsing interface of FUSE
  */
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+EXTERN_C_BEGIN
 
 /**
  * Option description
@@ -73,21 +73,22 @@ extern "C" {
  * If the format is "%s", memory is allocated for the string unlike
  * with scanf().
  */
-struct fuse_opt {
-	/** Matching template and optional parameter formatting */
-	const char *templ;
+struct fuse_opt
+{
+  /** Matching template and optional parameter formatting */
+  const char *templ;
 
-	/**
-	 * Offset of variable within 'data' parameter of fuse_opt_parse()
-	 * or -1
-	 */
-	unsigned long offset;
+  /**
+   * Offset of variable within 'data' parameter of fuse_opt_parse()
+   * or -1
+   */
+  unsigned long offset;
 
-	/**
-	 * Value to set the variable to, or to be passed as 'key' to the
-	 * processing function.	 Ignored if template has a format
-	 */
-	int value;
+  /**
+   * Value to set the variable to, or to be passed as 'key' to the
+   * processing function.	 Ignored if template has a format
+   */
+  int value;
 };
 
 /**
@@ -105,15 +106,16 @@ struct fuse_opt {
 /**
  * Argument list
  */
-struct fuse_args {
-	/** Argument count */
-	int argc;
+struct fuse_args
+{
+  /** Argument count */
+  int argc;
 
-	/** Argument vector.  NULL terminated */
-	char **argv;
+  /** Argument vector.  NULL terminated */
+  char **argv;
 
-	/** Is 'argv' allocated? */
-	int allocated;
+  /** Is 'argv' allocated? */
+  int allocated;
 };
 
 /**
@@ -177,7 +179,7 @@ struct fuse_args {
  * @return -1 on error, 0 if arg is to be discarded, 1 if arg should be kept
  */
 typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key,
-			       struct fuse_args *outargs);
+                               struct fuse_args *outargs);
 
 /**
  * Option parsing function
@@ -200,7 +202,7 @@ typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key,
  * @return -1 on error, 0 on success
  */
 int fuse_opt_parse(struct fuse_args *args, void *data,
-		   const struct fuse_opt opts[], fuse_opt_proc_t proc);
+                   const struct fuse_opt opts[], fuse_opt_proc_t proc);
 
 /**
  * Add an option to a comma separated option list
@@ -263,8 +265,6 @@ void fuse_opt_free_args(struct fuse_args *args);
  */
 int fuse_opt_match(const struct fuse_opt opts[], const char *opt);
 
-#ifdef __cplusplus
-}
-#endif
+EXTERN_C_END
 
 #endif /* _FUSE_OPT_H_ */

libfuse/include/fuse_pollhandle.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stdint.h>
+
+struct fuse_chan;
+struct fuse_ll;
+
+typedef struct fuse_pollhandle_t fuse_pollhandle_t;
+struct fuse_pollhandle_t
+{
+  uint64_t kh;
+  struct fuse_chan *ch;
+  struct fuse_ll *f;
+};

libfuse/include/fuse_timeouts.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct fuse_timeouts_s fuse_timeouts_t;
+struct fuse_timeouts_s
+{
+  uint64_t entry;
+  uint64_t attr;
+};

libfuse/include/kvec.h

@@ -0,0 +1,94 @@
+/* The MIT License
+
+   Copyright (c) 2008, by Attractive Chaos <attractor@live.co.uk>
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be
+   included in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+   SOFTWARE.
+*/
+
+/*
+  An example:
+
+  #include "kvec.h"
+  int main() {
+  kvec_t(int) array;
+  kv_init(array);
+  kv_push(int, array, 10); // append
+  kv_a(int, array, 20) = 5; // dynamic
+  kv_A(array, 20) = 4; // static
+  kv_destroy(array);
+  return 0;
+  }
+*/
+
+/*
+  2008-09-22 (0.1.0):
+
+  * The initial version.
+
+  */
+
+#ifndef AC_KVEC_H
+#define AC_KVEC_H
+
+#include <stdlib.h>
+
+#define kv_roundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x))
+
+#define kvec_t(type) struct { size_t n, m; type *a; }
+#define kv_init(v) ((v).n = (v).m = 0, (v).a = 0)
+#define kv_destroy(v) free((v).a)
+#define kv_A(v, i) ((v).a[(i)])
+#define kv_pop(v) ((v).a[--(v).n])
+#define kv_size(v) ((v).n)
+#define kv_max(v) ((v).m)
+#define kv_first(v) (kv_A(v,0))
+#define kv_last(v) (kv_A(v,kv_size(v)-1))
+#define kv_end(v) (kv_A(v,kv_size(v)))
+#define kv_delete(v,i) (kv_A(v,i) = kv_pop(v))
+
+#define kv_resize(type, v, s)  ((v).m = (s), (v).a = (type*)realloc((v).a, sizeof(type) * (v).m))
+
+#define kv_copy(type, v1, v0) do {                      \
+    if ((v1).m < (v0).n) kv_resize(type, v1, (v0).n);	\
+    (v1).n = (v0).n;                                    \
+    memcpy((v1).a, (v0).a, sizeof(type) * (v0).n);      \
+  } while (0)                                           \
+
+#define kv_push(type, v, x) do {                                \
+    if ((v).n == (v).m) {                                       \
+      (v).m = (v).m? (v).m<<1 : 2;                              \
+      (v).a = (type*)realloc((v).a, sizeof(type) * (v).m);	\
+    }                                                           \
+    (v).a[(v).n++] = (x);                                       \
+  } while (0)
+
+#define kv_pushp(type, v) (((v).n == (v).m)?                            \
+                           ((v).m = ((v).m? (v).m<<1 : 2),              \
+                            (v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \
+                           : 0), ((v).a + ((v).n++))
+
+#define kv_a(type, v, i) (((v).m <= (size_t)(i)?                        \
+                           ((v).m = (v).n = (i) + 1, kv_roundup32((v).m), \
+                            (v).a = (type*)realloc((v).a, sizeof(type) * (v).m), 0) \
+                           : (v).n <= (size_t)(i)? (v).n = (i) + 1      \
+                           : 0), (v).a[(i)])
+
+#endif

libfuse/include/linux_dirent64.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stdint.h>
+
+struct linux_dirent64
+{
+  uint64_t ino;
+  int64_t  off;
+  uint16_t reclen;
+  uint8_t  type;
+  char     name[];
+};

libfuse/include/old/fuse.h

@@ -1,9 +0,0 @@
-/*
-   This header is for compatibility with older software using FUSE.
-
-   Please use 'pkg-config --cflags fuse' to set include path.  The
-   correct usage is still '#include <fuse.h>', not '#include
-   <fuse/fuse.h>'.
-*/
-
-#include "fuse/fuse.h"

libfuse/include/stat_utils.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "config.h"
+
+#ifdef HAVE_STRUCT_STAT_ST_ATIM
+#define ST_ATIM_NSEC(ST) ((ST)->st_atim.tv_nsec)
+#define ST_CTIM_NSEC(ST) ((ST)->st_ctim.tv_nsec)
+#define ST_MTIM_NSEC(ST) ((ST)->st_mtim.tv_nsec)
+#elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC
+#define ST_ATIM_NSEC(ST) ((ST)->st_atimespec.tv_nsec)
+#define ST_CTIM_NSEC(ST) ((ST)->st_ctimespec.tv_nsec)
+#define ST_MTIM_NSEC(ST) ((ST)->st_mtimespec.tv_nsec)
+#else
+#define ST_ATIM_NSEC(ST) 0
+#define ST_CTIM_NSEC(ST) 0
+#define ST_MTIM_NSEC(ST) 0
+#endif

libfuse/include/ulockmgr.h

@@ -1,24 +0,0 @@
-/*
-  libulockmgr: Userspace Lock Manager Library
-  Copyright (C) 2006  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-#include <stdint.h>
-#include <fcntl.h>
-#include <sys/types.h>
-
-/**
- * Perform POSIX locking operation
- *
- * @param fd the file descriptor
- * @param cmd the locking command (F_GETFL, F_SETLK or F_SETLKW)
- * @param lock the lock parameters
- * @param owner the lock owner ID cookie
- * @param owner_len length of the lock owner ID cookie
- * @return 0 on success -errno on error
- */
-int ulockmgr_op(int fd, int cmd, struct flock *lock, const void *owner,
-		size_t owner_len);

libfuse/lib/Makefile.am

@@ -1,42 +0,0 @@
-## Process this file with automake to produce Makefile.in
-
-AUTOMAKE_OPTIONS = subdir-objects
-AM_CPPFLAGS = -I$(top_srcdir)/include -DFUSERMOUNT_DIR=\"$(bindir)\" \
- -D_FILE_OFFSET_BITS=64 -D_REENTRANT -DFUSE_USE_VERSION=26
-
-lib_LTLIBRARIES = libfuse.la libulockmgr.la
-
-if BSD
-mount_source = mount_bsd.c
-else
-mount_source = mount.c mount_util.c mount_util.h
-endif
-
-libfuse_la_SOURCES = 		\
-	fuse.c			\
-	fuse_i.h		\
-	fuse_kern_chan.c	\
-	fuse_loop.c		\
-	fuse_loop_mt.c		\
-	fuse_lowlevel.c		\
-	fuse_misc.h		\
-	fuse_mt.c		\
-	fuse_opt.c		\
-	fuse_session.c		\
-	fuse_signals.c		\
-	buffer.c		\
-	cuse_lowlevel.c		\
-	helper.c                \
-	$(mount_source)
-
-libfuse_la_LDFLAGS = -pthread @libfuse_libs@ -version-number 2:9:7 \
-	-Wl,--version-script,$(srcdir)/fuse_versionscript
-
-if NETBSD
-libfuse_la_LIBADD = -lperfuse -lpuffs
-endif
-
-libulockmgr_la_SOURCES = ulockmgr.c
-libulockmgr_la_LDFLAGS = -pthread -version-number 1:0:1
-
-EXTRA_DIST = fuse_versionscript

libfuse/lib/bounded_queue.hpp

@@ -0,0 +1,166 @@
+#pragma once
+
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+#include <utility>
+
+
+template<typename T>
+class BoundedQueue
+{
+public:
+  explicit
+  BoundedQueue(std::size_t max_size_,
+               bool        block_ = true)
+    : _block(block_),
+      _max_size(max_size_)
+  {
+  }
+
+  BoundedQueue(const BoundedQueue&) = delete;
+  BoundedQueue(BoundedQueue&&) = default;
+
+  bool
+  push(const T& item_)
+  {
+    {
+      std::unique_lock<std::mutex> guard(_queue_lock);
+
+      _condition_push.wait(guard, [&]() { return _queue.size() < _max_size || !_block; });
+
+      if(_queue.size() == _max_size)
+        return false;
+
+      _queue.push(item_);
+    }
+
+    _condition_pop.notify_one();
+
+    return true;
+  }
+
+  bool
+  push(T&& item_)
+  {
+    {
+      std::unique_lock<std::mutex> guard(_queue_lock);
+
+      _condition_push.wait(guard, [&]() { return _queue.size() < _max_size || !_block; });
+
+      if(_queue.size() == _max_size)
+        return false;
+
+      _queue.push(std::move(item_));
+    }
+    _condition_pop.notify_one();
+    return true;
+  }
+
+  template<typename... Args>
+  bool
+  emplace(Args&&... args_)
+  {
+    {
+      std::unique_lock<std::mutex> guard(_queue_lock);
+
+      _condition_push.wait(guard, [&]() { return _queue.size() < _max_size || !_block; });
+
+      if(_queue.size() == _max_size)
+        return false;
+
+      _queue.emplace(std::forward<Args>(args_)...);
+    }
+
+    _condition_pop.notify_one();
+
+    return true;
+  }
+
+  bool
+  pop(T& item_)
+  {
+    {
+      std::unique_lock<std::mutex> guard(_queue_lock);
+
+      _condition_pop.wait(guard, [&]() { return !_queue.empty() || !_block; });
+      if(_queue.empty())
+        return false;
+
+      item_ = std::move(_queue.front());
+
+      _queue.pop();
+    }
+
+    _condition_push.notify_one();
+
+    return true;
+  }
+
+  std::size_t
+  size() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _queue.size();
+  }
+
+  std::size_t
+  capacity() const
+  {
+    return _max_size;
+  }
+
+  bool
+  empty() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _queue.empty();
+  }
+
+  bool
+  full() const
+  {
+    std::lock_guard<std::mutex> lock(_queue_lock);
+
+    return (_queue.size() == capacity());
+  }
+
+  void
+  block()
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+    _block = true;
+  }
+
+  void
+  unblock()
+  {
+    {
+      std::lock_guard<std::mutex> guard(_queue_lock);
+      _block = false;
+    }
+
+    _condition_push.notify_all();
+    _condition_pop.notify_all();
+  }
+
+  bool
+  blocking() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _block;
+  }
+
+private:
+  mutable std::mutex _queue_lock;
+
+private:
+  bool _block;
+  std::queue<T> _queue;
+  const std::size_t _max_size;
+  std::condition_variable _condition_push;
+  std::condition_variable _condition_pop;
+};

libfuse/lib/bounded_thread_pool.hpp

@@ -0,0 +1,130 @@
+#pragma once
+
+#include "bounded_queue.hpp"
+
+#include <tuple>
+#include <atomic>
+#include <vector>
+#include <thread>
+#include <memory>
+#include <future>
+#include <utility>
+#include <functional>
+#include <type_traits>
+
+
+class BoundedThreadPool
+{
+private:
+  using Proc   = std::function<void(void)>;
+  using Queue  = BoundedQueue<Proc>;
+  using Queues = std::vector<std::shared_ptr<Queue>>;
+  
+public:
+  explicit
+  BoundedThreadPool(const std::size_t thread_count_ = std::thread::hardware_concurrency())
+    : _queues(),
+      _count(thread_count_)
+  {
+    printf("threads: %d\n",thread_count_);
+    for(std::size_t i = 0; i < thread_count_; i++)
+      _queues.emplace_back(std::make_shared<Queue>(1));
+    
+    auto worker = [this](std::size_t i)
+    {
+      while(true)
+        {
+          Proc f;
+
+          for(std::size_t n = 0; n < (_count * K); ++n)
+            {
+              if(_queues[(i + n) % _count]->pop(f))
+                break;
+            }
+
+          if(!f && !_queues[i]->pop(f))
+            break;
+
+          f();
+        }
+    };
+
+    _threads.reserve(thread_count_);
+    for(std::size_t i = 0; i < thread_count_; ++i)
+      _threads.emplace_back(worker, i);
+  }
+
+  ~BoundedThreadPool()
+  {
+    for(auto& queue : _queues)
+      queue->unblock();
+    for(auto& thread : _threads)
+      thread.join();
+  }
+
+  template<typename F>
+  void
+  enqueue_work(F&& f_)
+  {
+    auto i = _index++;
+
+    for(std::size_t n = 0; n < (_count * K); ++n)
+      {
+        if(_queues[(i + n) % _count]->push(f_))
+          return;
+      }
+
+    _queues[i % _count]->push(std::move(f_));
+  }
+
+  template<typename F>
+  [[nodiscard]]
+  std::future<typename std::result_of<F()>::type>
+  enqueue_task(F&& f_)
+  {
+    using TaskReturnType = typename std::result_of<F()>::type;
+    using Promise        = std::promise<TaskReturnType>;
+
+    auto i       = _index++;
+    auto promise = std::make_shared<Promise>();
+    auto future  = promise->get_future();
+    auto work    = [=]() {
+      auto rv = f_();
+      promise->set_value(rv);
+    };
+
+    for(std::size_t n = 0; n < (_count * K); ++n)
+      {
+        if(_queues[(i + n) % _count]->push(work))
+          return future;
+      }
+
+    _queues[i % _count]->push(std::move(work));
+
+    return future;
+  }
+
+public:
+  std::vector<pthread_t>
+  threads()
+  {
+    std::vector<pthread_t> rv;
+
+    for(auto &thread : _threads)
+      rv.push_back(thread.native_handle());
+
+    return rv;
+  }
+
+private:
+  Queues _queues;
+
+private:
+  std::vector<std::thread> _threads;
+
+private:
+  const std::size_t _count;
+  std::atomic_uint _index;
+
+  static const unsigned int K = 2;
+};

libfuse/lib/buffer.c

@@ -18,140 +18,140 @@
 
 size_t fuse_buf_size(const struct fuse_bufvec *bufv)
 {
-	size_t i;
-	size_t size = 0;
+  size_t i;
+  size_t size = 0;
 
-	for (i = 0; i < bufv->count; i++) {
-		if (bufv->buf[i].size == SIZE_MAX)
-			size = SIZE_MAX;
-		else
-			size += bufv->buf[i].size;
-	}
+  for (i = 0; i < bufv->count; i++) {
+    if (bufv->buf[i].size == SIZE_MAX)
+      size = SIZE_MAX;
+    else
+      size += bufv->buf[i].size;
+  }
 
-	return size;
+  return size;
 }
 
 static size_t min_size(size_t s1, size_t s2)
 {
-	return s1 < s2 ? s1 : s2;
+  return s1 < s2 ? s1 : s2;
 }
 
 static ssize_t fuse_buf_write(const struct fuse_buf *dst, size_t dst_off,
 			      const struct fuse_buf *src, size_t src_off,
 			      size_t len)
 {
-	ssize_t res = 0;
-	size_t copied = 0;
+  ssize_t res = 0;
+  size_t copied = 0;
 
-	while (len) {
-		if (dst->flags & FUSE_BUF_FD_SEEK) {
-			res = pwrite(dst->fd, src->mem + src_off, len,
-				     dst->pos + dst_off);
-		} else {
-			res = write(dst->fd, src->mem + src_off, len);
-		}
-		if (res == -1) {
-			if (!copied)
-				return -errno;
-			break;
-		}
-		if (res == 0)
-			break;
+  while (len) {
+    if (dst->flags & FUSE_BUF_FD_SEEK) {
+      res = pwrite(dst->fd, src->mem + src_off, len,
+                   dst->pos + dst_off);
+    } else {
+      res = write(dst->fd, src->mem + src_off, len);
+    }
+    if (res == -1) {
+      if (!copied)
+        return -errno;
+      break;
+    }
+    if (res == 0)
+      break;
 
-		copied += res;
-		if (!(dst->flags & FUSE_BUF_FD_RETRY))
-			break;
+    copied += res;
+    if (!(dst->flags & FUSE_BUF_FD_RETRY))
+      break;
 
-		src_off += res;
-		dst_off += res;
-		len -= res;
-	}
+    src_off += res;
+    dst_off += res;
+    len -= res;
+  }
 
-	return copied;
+  return copied;
 }
 
 static ssize_t fuse_buf_read(const struct fuse_buf *dst, size_t dst_off,
 			     const struct fuse_buf *src, size_t src_off,
 			     size_t len)
 {
-	ssize_t res = 0;
-	size_t copied = 0;
+  ssize_t res = 0;
+  size_t copied = 0;
 
-	while (len) {
-		if (src->flags & FUSE_BUF_FD_SEEK) {
-			res = pread(src->fd, dst->mem + dst_off, len,
-				     src->pos + src_off);
-		} else {
-			res = read(src->fd, dst->mem + dst_off, len);
-		}
-		if (res == -1) {
-			if (!copied)
-				return -errno;
-			break;
-		}
-		if (res == 0)
-			break;
+  while (len) {
+    if (src->flags & FUSE_BUF_FD_SEEK) {
+      res = pread(src->fd, dst->mem + dst_off, len,
+                  src->pos + src_off);
+    } else {
+      res = read(src->fd, dst->mem + dst_off, len);
+    }
+    if (res == -1) {
+      if (!copied)
+        return -errno;
+      break;
+    }
+    if (res == 0)
+      break;
 
-		copied += res;
-		if (!(src->flags & FUSE_BUF_FD_RETRY))
-			break;
+    copied += res;
+    if (!(src->flags & FUSE_BUF_FD_RETRY))
+      break;
 
-		dst_off += res;
-		src_off += res;
-		len -= res;
-	}
+    dst_off += res;
+    src_off += res;
+    len -= res;
+  }
 
-	return copied;
+  return copied;
 }
 
 static ssize_t fuse_buf_fd_to_fd(const struct fuse_buf *dst, size_t dst_off,
 				 const struct fuse_buf *src, size_t src_off,
 				 size_t len)
 {
-	char buf[4096];
-	struct fuse_buf tmp = {
-		.size = sizeof(buf),
-		.flags = 0,
-	};
-	ssize_t res;
-	size_t copied = 0;
+  char buf[4096];
+  struct fuse_buf tmp = {
+    .size = sizeof(buf),
+    .flags = 0,
+  };
+  ssize_t res;
+  size_t copied = 0;
 
-	tmp.mem = buf;
+  tmp.mem = buf;
 
-	while (len) {
-		size_t this_len = min_size(tmp.size, len);
-		size_t read_len;
+  while (len) {
+    size_t this_len = min_size(tmp.size, len);
+    size_t read_len;
 
-		res = fuse_buf_read(&tmp, 0, src, src_off, this_len);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		if (res == 0)
-			break;
+    res = fuse_buf_read(&tmp, 0, src, src_off, this_len);
+    if (res < 0) {
+      if (!copied)
+        return res;
+      break;
+    }
+    if (res == 0)
+      break;
 
-		read_len = res;
-		res = fuse_buf_write(dst, dst_off, &tmp, 0, read_len);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		if (res == 0)
-			break;
+    read_len = res;
+    res = fuse_buf_write(dst, dst_off, &tmp, 0, read_len);
+    if (res < 0) {
+      if (!copied)
+        return res;
+      break;
+    }
+    if (res == 0)
+      break;
 
-		copied += res;
+    copied += res;
 
-		if (res < this_len)
-			break;
+    if (res < this_len)
+      break;
 
-		dst_off += res;
-		src_off += res;
-		len -= res;
-	}
+    dst_off += res;
+    src_off += res;
+    len -= res;
+  }
 
-	return copied;
+  return copied;
 }
 
 #ifdef HAVE_SPLICE
@@ -159,64 +159,63 @@ static ssize_t fuse_buf_splice(const struct fuse_buf *dst, size_t dst_off,
 			       const struct fuse_buf *src, size_t src_off,
 			       size_t len, enum fuse_buf_copy_flags flags)
 {
-	int splice_flags = 0;
-	off_t *srcpos = NULL;
-	off_t *dstpos = NULL;
-	off_t srcpos_val;
-	off_t dstpos_val;
-	ssize_t res;
-	size_t copied = 0;
+  int splice_flags = 0;
+  off_t *srcpos = NULL;
+  off_t *dstpos = NULL;
+  off_t srcpos_val;
+  off_t dstpos_val;
+  ssize_t res;
+  size_t copied = 0;
 
-	if (flags & FUSE_BUF_SPLICE_MOVE)
-		splice_flags |= SPLICE_F_MOVE;
-	if (flags & FUSE_BUF_SPLICE_NONBLOCK)
-		splice_flags |= SPLICE_F_NONBLOCK;
+  if (flags & FUSE_BUF_SPLICE_MOVE)
+    splice_flags |= SPLICE_F_MOVE;
+  if (flags & FUSE_BUF_SPLICE_NONBLOCK)
+    splice_flags |= SPLICE_F_NONBLOCK;
 
-	if (src->flags & FUSE_BUF_FD_SEEK) {
-		srcpos_val = src->pos + src_off;
-		srcpos = &srcpos_val;
-	}
-	if (dst->flags & FUSE_BUF_FD_SEEK) {
-		dstpos_val = dst->pos + dst_off;
-		dstpos = &dstpos_val;
-	}
+  if (src->flags & FUSE_BUF_FD_SEEK) {
+    srcpos_val = src->pos + src_off;
+    srcpos = &srcpos_val;
+  }
+  if (dst->flags & FUSE_BUF_FD_SEEK) {
+    dstpos_val = dst->pos + dst_off;
+    dstpos = &dstpos_val;
+  }
 
-	while (len) {
-		res = splice(src->fd, srcpos, dst->fd, dstpos, len,
-			     splice_flags);
-		if (res == -1) {
-			if (copied)
-				break;
+  while (len) {
+    res = splice(src->fd, srcpos, dst->fd, dstpos, len, splice_flags);
+    if (res == -1) {
+      if (copied)
+        break;
 
-			if (errno != EINVAL || (flags & FUSE_BUF_FORCE_SPLICE))
-				return -errno;
+      if (errno != EINVAL || (flags & FUSE_BUF_FORCE_SPLICE))
+        return -errno;
 
-			/* Maybe splice is not supported for this combination */
-			return fuse_buf_fd_to_fd(dst, dst_off, src, src_off,
-						 len);
-		}
-		if (res == 0)
-			break;
+      /* Maybe splice is not supported for this combination */
+      return fuse_buf_fd_to_fd(dst, dst_off, src, src_off,
+                               len);
+    }
+    if (res == 0)
+      break;
 
-		copied += res;
-		if (!(src->flags & FUSE_BUF_FD_RETRY) &&
-		    !(dst->flags & FUSE_BUF_FD_RETRY)) {
-			break;
-		}
+    copied += res;
+    if (!(src->flags & FUSE_BUF_FD_RETRY) &&
+        !(dst->flags & FUSE_BUF_FD_RETRY)) {
+      break;
+    }
 
-		len -= res;
-	}
+    len -= res;
+  }
 
-	return copied;
+  return copied;
 }
 #else
 static ssize_t fuse_buf_splice(const struct fuse_buf *dst, size_t dst_off,
 			       const struct fuse_buf *src, size_t src_off,
 			       size_t len, enum fuse_buf_copy_flags flags)
 {
-	(void) flags;
+  (void) flags;
 
-	return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
+  return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
 }
 #endif
 
@@ -225,94 +224,94 @@ static ssize_t fuse_buf_copy_one(const struct fuse_buf *dst, size_t dst_off,
 				 const struct fuse_buf *src, size_t src_off,
 				 size_t len, enum fuse_buf_copy_flags flags)
 {
-	int src_is_fd = src->flags & FUSE_BUF_IS_FD;
-	int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
+  int src_is_fd = src->flags & FUSE_BUF_IS_FD;
+  int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
 
-	if (!src_is_fd && !dst_is_fd) {
-		void *dstmem = dst->mem + dst_off;
-		void *srcmem = src->mem + src_off;
+  if (!src_is_fd && !dst_is_fd) {
+    char *dstmem = dst->mem + dst_off;
+    char *srcmem = src->mem + src_off;
 
-		if (dstmem != srcmem) {
-			if (dstmem + len <= srcmem || srcmem + len <= dstmem)
-				memcpy(dstmem, srcmem, len);
-			else
-				memmove(dstmem, srcmem, len);
-		}
+    if (dstmem != srcmem) {
+      if (dstmem + len <= srcmem || srcmem + len <= dstmem)
+        memcpy(dstmem, srcmem, len);
+      else
+        memmove(dstmem, srcmem, len);
+    }
 
-		return len;
-	} else if (!src_is_fd) {
-		return fuse_buf_write(dst, dst_off, src, src_off, len);
-	} else if (!dst_is_fd) {
-		return fuse_buf_read(dst, dst_off, src, src_off, len);
-	} else if (flags & FUSE_BUF_NO_SPLICE) {
-		return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
-	} else {
-		return fuse_buf_splice(dst, dst_off, src, src_off, len, flags);
-	}
+    return len;
+  } else if (!src_is_fd) {
+    return fuse_buf_write(dst, dst_off, src, src_off, len);
+  } else if (!dst_is_fd) {
+    return fuse_buf_read(dst, dst_off, src, src_off, len);
+  } else if (flags & FUSE_BUF_NO_SPLICE) {
+    return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
+  } else {
+    return fuse_buf_splice(dst, dst_off, src, src_off, len, flags);
+  }
 }
 
 static const struct fuse_buf *fuse_bufvec_current(struct fuse_bufvec *bufv)
 {
-	if (bufv->idx < bufv->count)
-		return &bufv->buf[bufv->idx];
-	else
-		return NULL;
+  if (bufv->idx < bufv->count)
+    return &bufv->buf[bufv->idx];
+  else
+    return NULL;
 }
 
 static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len)
 {
-	const struct fuse_buf *buf = fuse_bufvec_current(bufv);
+  const struct fuse_buf *buf = fuse_bufvec_current(bufv);
 
-	bufv->off += len;
-	assert(bufv->off <= buf->size);
-	if (bufv->off == buf->size) {
-		assert(bufv->idx < bufv->count);
-		bufv->idx++;
-		if (bufv->idx == bufv->count)
-			return 0;
-		bufv->off = 0;
-	}
-	return 1;
+  bufv->off += len;
+  assert(bufv->off <= buf->size);
+  if (bufv->off == buf->size) {
+    assert(bufv->idx < bufv->count);
+    bufv->idx++;
+    if (bufv->idx == bufv->count)
+      return 0;
+    bufv->off = 0;
+  }
+  return 1;
 }
 
 ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv,
 		      enum fuse_buf_copy_flags flags)
 {
-	size_t copied = 0;
+  size_t copied = 0;
 
-	if (dstv == srcv)
-		return fuse_buf_size(dstv);
+  if (dstv == srcv)
+    return fuse_buf_size(dstv);
 
-	for (;;) {
-		const struct fuse_buf *src = fuse_bufvec_current(srcv);
-		const struct fuse_buf *dst = fuse_bufvec_current(dstv);
-		size_t src_len;
-		size_t dst_len;
-		size_t len;
-		ssize_t res;
+  for (;;) {
+    const struct fuse_buf *src = fuse_bufvec_current(srcv);
+    const struct fuse_buf *dst = fuse_bufvec_current(dstv);
+    size_t src_len;
+    size_t dst_len;
+    size_t len;
+    ssize_t res;
 
-		if (src == NULL || dst == NULL)
-			break;
+    if (src == NULL || dst == NULL)
+      break;
 
-		src_len = src->size - srcv->off;
-		dst_len = dst->size - dstv->off;
-		len = min_size(src_len, dst_len);
+    src_len = src->size - srcv->off;
+    dst_len = dst->size - dstv->off;
+    len = min_size(src_len, dst_len);
 
-		res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
-		if (res < 0) {
-			if (!copied)
-				return res;
-			break;
-		}
-		copied += res;
+    res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len, flags);
+    if (res < 0) {
+      if (!copied)
+        return res;
+      break;
+    }
+    copied += res;
 
-		if (!fuse_bufvec_advance(srcv, res) ||
-		    !fuse_bufvec_advance(dstv, res))
-			break;
+    if (!fuse_bufvec_advance(srcv, res) ||
+        !fuse_bufvec_advance(dstv, res))
+      break;
 
-		if (res < len)
-			break;
-	}
+    if (res < len)
+      break;
+  }
 
-	return copied;
+  return copied;
 }

libfuse/lib/cpu.cpp

@@ -0,0 +1,163 @@
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include "cpu.hpp"
+#include "ghc/filesystem.hpp"
+#include "fmt/core.h"
+
+#include <sched.h>
+
+#include <fstream>
+
+
+int
+CPU::getaffinity(const pthread_t  thread_id_,
+                 cpu_set_t       *cpuset_)
+{
+  CPU_ZERO(cpuset_);
+  return sched_getaffinity(thread_id_,
+                           sizeof(cpu_set_t),
+                           cpuset_);
+}
+
+int
+CPU::setaffinity(const pthread_t  thread_id_,
+                 cpu_set_t       *cpuset_)
+{
+  return pthread_setaffinity_np(thread_id_,
+                                sizeof(cpu_set_t),
+                                cpuset_);
+}
+
+int
+CPU::setaffinity(const pthread_t thread_id_,
+                 const int       cpu_)
+{
+  cpu_set_t cpuset;
+
+  CPU_ZERO(&cpuset);
+  CPU_SET(cpu_,&cpuset);
+
+  return CPU::setaffinity(thread_id_,&cpuset);
+}
+
+int
+CPU::setaffinity(const pthread_t     thread_id_,
+                 const std::set<int> cpus_)
+{
+  cpu_set_t cpuset;
+
+  CPU_ZERO(&cpuset);
+  for(auto const cpu : cpus_)
+    CPU_SET(cpu,&cpuset);
+
+  return CPU::setaffinity(thread_id_,&cpuset);
+}
+
+static
+ghc::filesystem::path
+generate_cpu_core_id_path(const int cpu_id_)
+{
+  const ghc::filesystem::path basepath{"/sys/devices/system/cpu"};
+
+  return basepath / fmt::format("cpu{}",cpu_id_) / "topology" / "core_id";
+}
+
+int
+CPU::count()
+{
+  int rv;
+  cpu_set_t cpuset;
+
+  rv = CPU::getaffinity(0,&cpuset);
+  if(rv < 0)
+    return rv;
+
+  return CPU_COUNT(&cpuset);
+}
+
+CPU::CPUVec
+CPU::cpus()
+{
+  cpu_set_t cpuset;
+  CPU::CPUVec cpuvec;
+
+  CPU::getaffinity(0,&cpuset);
+
+  for(int i = 0; i < CPU_SETSIZE; i++)
+    {
+      if(!CPU_ISSET(i,&cpuset))
+        continue;
+
+      cpuvec.push_back(i);
+    }
+
+  return cpuvec;
+}
+
+CPU::CPU2CoreMap
+CPU::cpu2core()
+{
+  cpu_set_t cpuset;
+  CPU::CPU2CoreMap c2c;
+
+  CPU::getaffinity(0,&cpuset);
+
+  for(int i = 0; i < CPU_SETSIZE; i++)
+    {
+      int core_id;
+      std::ifstream ifs;
+      ghc::filesystem::path path;
+
+      if(!CPU_ISSET(i,&cpuset))
+        continue;
+
+      path = ::generate_cpu_core_id_path(i);
+
+      ifs.open(path);
+      if(!ifs)
+        break;
+
+      ifs >> core_id;
+
+      c2c[i] = core_id;
+
+      ifs.close();
+    }
+
+  return c2c;
+}
+
+CPU::Core2CPUsMap
+CPU::core2cpus()
+{
+  cpu_set_t cpuset;
+  CPU::Core2CPUsMap c2c;
+
+  CPU::getaffinity(0,&cpuset);
+
+  for(int i = 0; i < CPU_SETSIZE; i++)
+    {
+      int core_id;
+      std::ifstream ifs;
+      ghc::filesystem::path path;
+
+      if(!CPU_ISSET(i,&cpuset))
+        continue;
+
+      path = ::generate_cpu_core_id_path(i);
+
+      ifs.open(path);
+      if(!ifs)
+        break;
+
+      ifs >> core_id;
+
+      c2c[core_id].insert(i);
+
+      ifs.close();
+    }
+
+  return c2c;
+}

libfuse/lib/cpu.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <pthread.h>
+#include <sched.h>
+
+#include <set>
+#include <unordered_map>
+#include <vector>
+
+
+class CPU
+{
+public:
+  typedef std::vector<pthread_t> ThreadIdVec;
+  typedef std::vector<int> CPUVec;
+  typedef std::unordered_map<int,int> CPU2CoreMap;
+  typedef std::unordered_map<int,std::set<int>> Core2CPUsMap;
+
+public:
+  static int count();
+  static int getaffinity(const pthread_t thread_id, cpu_set_t *cpuset);
+  static int setaffinity(const pthread_t thread_id, cpu_set_t *cpuset);
+  static int setaffinity(const pthread_t thread_id, const int cpu);
+  static int setaffinity(const pthread_t thread_id, const std::set<int> cpus);
+
+  static CPU::CPUVec cpus();
+  static CPU::CPU2CoreMap cpu2core();
+  static CPU::Core2CPUsMap core2cpus();
+};

libfuse/lib/crc32b.c

@@ -0,0 +1,112 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "crc32b.h"
+
+static
+const
+crc32b_t CRC32BTABLE[256] =
+  {
+   0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
+   0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+   0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
+   0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+   0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
+   0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+   0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
+   0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+   0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
+   0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+   0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
+   0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+   0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
+   0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+   0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
+   0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+   0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
+   0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+   0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
+   0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+   0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
+   0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+   0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
+   0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+   0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
+   0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+   0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
+   0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+   0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
+   0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+   0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
+   0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+   0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
+   0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+   0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
+   0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+   0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
+   0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+   0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
+   0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+   0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
+   0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+   0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
+  };
+
+crc32b_t
+crc32b_start(void)
+{
+  return 0xFFFFFFFF;
+}
+
+crc32b_t
+crc32b_continue(const void     *buf_,
+                const crc32b_t  len_,
+                const crc32b_t  crc_)
+{
+  int i;
+  char *buf;
+  crc32b_t crc;
+
+  crc = crc_;
+  buf = (char*)buf_;
+  for(i = 0; i < len_; i++)
+    {
+      crc = (CRC32BTABLE[(crc ^ buf[i]) & 0xFFL] ^ (crc >> 8));
+    }
+
+  return crc;
+}
+
+crc32b_t
+crc32b_finish(const crc32b_t crc_)
+{
+  return (crc_ ^ 0xFFFFFFFF);
+}
+
+crc32b_t
+crc32b(const void     *buf_,
+       const crc32b_t  len_)
+{
+  crc32b_t crc;
+
+  crc = crc32b_start();
+  crc = crc32b_continue(buf_,len_,crc);
+  crc = crc32b_finish(crc);
+
+  return crc;
+}

libfuse/lib/crc32b.h

@@ -0,0 +1,32 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef CRC32B_H_INCLUDED
+#define CRC32B_H_INCLUDED
+
+typedef unsigned int crc32b_t;
+
+crc32b_t crc32b_start(void);
+crc32b_t crc32b_continue(const void     *buf,
+                         const crc32b_t  len,
+                         const crc32b_t  crc);
+crc32b_t crc32b_finish(const crc32b_t crc);
+
+crc32b_t crc32b(const void *buf, crc32b_t len);
+
+#endif

libfuse/lib/cuse_lowlevel.c

@@ -1,371 +0,0 @@
-/*
-  CUSE: Character device in Userspace
-  Copyright (C) 2008       SUSE Linux Products GmbH
-  Copyright (C) 2008       Tejun Heo <teheo@suse.de>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-#include "cuse_lowlevel.h"
-#include "fuse_kernel.h"
-#include "fuse_i.h"
-#include "fuse_opt.h"
-#include "fuse_misc.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <errno.h>
-#include <unistd.h>
-
-struct cuse_data {
-	struct cuse_lowlevel_ops	clop;
-	unsigned			max_read;
-	unsigned			dev_major;
-	unsigned			dev_minor;
-	unsigned			flags;
-	unsigned			dev_info_len;
-	char				dev_info[];
-};
-
-static struct cuse_lowlevel_ops *req_clop(fuse_req_t req)
-{
-	return &req->f->cuse_data->clop;
-}
-
-static void cuse_fll_open(fuse_req_t req, fuse_ino_t ino,
-			  struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->open(req, fi);
-}
-
-static void cuse_fll_read(fuse_req_t req, fuse_ino_t ino, size_t size,
-			  off_t off, struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->read(req, size, off, fi);
-}
-
-static void cuse_fll_write(fuse_req_t req, fuse_ino_t ino, const char *buf,
-			   size_t size, off_t off, struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->write(req, buf, size, off, fi);
-}
-
-static void cuse_fll_flush(fuse_req_t req, fuse_ino_t ino,
-			   struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->flush(req, fi);
-}
-
-static void cuse_fll_release(fuse_req_t req, fuse_ino_t ino,
-			     struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->release(req, fi);
-}
-
-static void cuse_fll_fsync(fuse_req_t req, fuse_ino_t ino, int datasync,
-			   struct fuse_file_info *fi)
-{
-	(void)ino;
-	req_clop(req)->fsync(req, datasync, fi);
-}
-
-static void cuse_fll_ioctl(fuse_req_t req, fuse_ino_t ino, int cmd, void *arg,
-		       struct fuse_file_info *fi, unsigned int flags,
-		       const void *in_buf, size_t in_bufsz, size_t out_bufsz)
-{
-	(void)ino;
-	req_clop(req)->ioctl(req, cmd, arg, fi, flags, in_buf, in_bufsz,
-			     out_bufsz);
-}
-
-static void cuse_fll_poll(fuse_req_t req, fuse_ino_t ino,
-			  struct fuse_file_info *fi, struct fuse_pollhandle *ph)
-{
-	(void)ino;
-	req_clop(req)->poll(req, fi, ph);
-}
-
-static size_t cuse_pack_info(int argc, const char **argv, char *buf)
-{
-	size_t size = 0;
-	int i;
-
-	for (i = 0; i < argc; i++) {
-		size_t len;
-
-		len = strlen(argv[i]) + 1;
-		size += len;
-		if (buf) {
-			memcpy(buf, argv[i], len);
-			buf += len;
-		}
-	}
-
-	return size;
-}
-
-static struct cuse_data *cuse_prep_data(const struct cuse_info *ci,
-					const struct cuse_lowlevel_ops *clop)
-{
-	struct cuse_data *cd;
-	size_t dev_info_len;
-
-	dev_info_len = cuse_pack_info(ci->dev_info_argc, ci->dev_info_argv,
-				      NULL);
-
-	if (dev_info_len > CUSE_INIT_INFO_MAX) {
-		fprintf(stderr, "cuse: dev_info (%zu) too large, limit=%u\n",
-			dev_info_len, CUSE_INIT_INFO_MAX);
-		return NULL;
-	}
-
-	cd = calloc(1, sizeof(*cd) + dev_info_len);
-	if (!cd) {
-		fprintf(stderr, "cuse: failed to allocate cuse_data\n");
-		return NULL;
-	}
-
-	memcpy(&cd->clop, clop, sizeof(cd->clop));
-	cd->max_read = 131072;
-	cd->dev_major = ci->dev_major;
-	cd->dev_minor = ci->dev_minor;
-	cd->dev_info_len = dev_info_len;
-	cd->flags = ci->flags;
-	cuse_pack_info(ci->dev_info_argc, ci->dev_info_argv, cd->dev_info);
-
-	return cd;
-}
-
-struct fuse_session *cuse_lowlevel_new(struct fuse_args *args,
-				       const struct cuse_info *ci,
-				       const struct cuse_lowlevel_ops *clop,
-				       void *userdata)
-{
-	struct fuse_lowlevel_ops lop;
-	struct cuse_data *cd;
-	struct fuse_session *se;
-	struct fuse_ll *ll;
-
-	cd = cuse_prep_data(ci, clop);
-	if (!cd)
-		return NULL;
-
-	memset(&lop, 0, sizeof(lop));
-	lop.init	= clop->init;
-	lop.destroy	= clop->destroy;
-	lop.open	= clop->open		? cuse_fll_open		: NULL;
-	lop.read	= clop->read		? cuse_fll_read		: NULL;
-	lop.write	= clop->write		? cuse_fll_write	: NULL;
-	lop.flush	= clop->flush		? cuse_fll_flush	: NULL;
-	lop.release	= clop->release		? cuse_fll_release	: NULL;
-	lop.fsync	= clop->fsync		? cuse_fll_fsync	: NULL;
-	lop.ioctl	= clop->ioctl		? cuse_fll_ioctl	: NULL;
-	lop.poll	= clop->poll		? cuse_fll_poll		: NULL;
-
-	se = fuse_lowlevel_new_common(args, &lop, sizeof(lop), userdata);
-	if (!se) {
-		free(cd);
-		return NULL;
-	}
-	ll = se->data;
-	ll->cuse_data = cd;
-
-	return se;
-}
-
-static int cuse_reply_init(fuse_req_t req, struct cuse_init_out *arg,
-			   char *dev_info, unsigned dev_info_len)
-{
-	struct iovec iov[3];
-
-	iov[1].iov_base = arg;
-	iov[1].iov_len = sizeof(struct cuse_init_out);
-	iov[2].iov_base = dev_info;
-	iov[2].iov_len = dev_info_len;
-
-	return fuse_send_reply_iov_nofree(req, 0, iov, 3);
-}
-
-void cuse_lowlevel_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
-{
-	struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
-	struct cuse_init_out outarg;
-	struct fuse_ll *f = req->f;
-	struct cuse_data *cd = f->cuse_data;
-	size_t bufsize = fuse_chan_bufsize(req->ch);
-	struct cuse_lowlevel_ops *clop = req_clop(req);
-
-	(void) nodeid;
-	if (f->debug) {
-		fprintf(stderr, "CUSE_INIT: %u.%u\n", arg->major, arg->minor);
-		fprintf(stderr, "flags=0x%08x\n", arg->flags);
-	}
-	f->conn.proto_major = arg->major;
-	f->conn.proto_minor = arg->minor;
-	f->conn.capable = 0;
-	f->conn.want = 0;
-
-	if (arg->major < 7) {
-		fprintf(stderr, "cuse: unsupported protocol version: %u.%u\n",
-			arg->major, arg->minor);
-		fuse_reply_err(req, EPROTO);
-		return;
-	}
-
-	if (bufsize < FUSE_MIN_READ_BUFFER) {
-		fprintf(stderr, "cuse: warning: buffer size too small: %zu\n",
-			bufsize);
-		bufsize = FUSE_MIN_READ_BUFFER;
-	}
-
-	bufsize -= 4096;
-	if (bufsize < f->conn.max_write)
-		f->conn.max_write = bufsize;
-
-	f->got_init = 1;
-	if (f->op.init)
-		f->op.init(f->userdata, &f->conn);
-
-	memset(&outarg, 0, sizeof(outarg));
-	outarg.major = FUSE_KERNEL_VERSION;
-	outarg.minor = FUSE_KERNEL_MINOR_VERSION;
-	outarg.flags = cd->flags;
-	outarg.max_read = cd->max_read;
-	outarg.max_write = f->conn.max_write;
-	outarg.dev_major = cd->dev_major;
-	outarg.dev_minor = cd->dev_minor;
-
-	if (f->debug) {
-		fprintf(stderr, "   CUSE_INIT: %u.%u\n",
-			outarg.major, outarg.minor);
-		fprintf(stderr, "   flags=0x%08x\n", outarg.flags);
-		fprintf(stderr, "   max_read=0x%08x\n", outarg.max_read);
-		fprintf(stderr, "   max_write=0x%08x\n", outarg.max_write);
-		fprintf(stderr, "   dev_major=%u\n", outarg.dev_major);
-		fprintf(stderr, "   dev_minor=%u\n", outarg.dev_minor);
-		fprintf(stderr, "   dev_info: %.*s\n", cd->dev_info_len,
-			cd->dev_info);
-	}
-
-	cuse_reply_init(req, &outarg, cd->dev_info, cd->dev_info_len);
-
-	if (clop->init_done)
-		clop->init_done(f->userdata);
-
-	fuse_free_req(req);
-}
-
-struct fuse_session *cuse_lowlevel_setup(int argc, char *argv[],
-					 const struct cuse_info *ci,
-					 const struct cuse_lowlevel_ops *clop,
-					 int *multithreaded, void *userdata)
-{
-	const char *devname = "/dev/cuse";
-	static const struct fuse_opt kill_subtype_opts[] = {
-		FUSE_OPT_KEY("subtype=",  FUSE_OPT_KEY_DISCARD),
-		FUSE_OPT_END
-	};
-	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
-	struct fuse_session *se;
-	struct fuse_chan *ch;
-	int fd;
-	int foreground;
-	int res;
-
-	res = fuse_parse_cmdline(&args, NULL, multithreaded, &foreground);
-	if (res == -1)
-		goto err_args;
-
-	res = fuse_opt_parse(&args, NULL, kill_subtype_opts, NULL);
-	if (res == -1)
-		goto err_args;
-
-	/*
-	 * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
-	 * would ensue.
-	 */
-	do {
-		fd = open("/dev/null", O_RDWR);
-		if (fd > 2)
-			close(fd);
-	} while (fd >= 0 && fd <= 2);
-
-	se = cuse_lowlevel_new(&args, ci, clop, userdata);
-	fuse_opt_free_args(&args);
-	if (se == NULL)
-		goto err_args;
-
-	fd = open(devname, O_RDWR);
-	if (fd == -1) {
-		if (errno == ENODEV || errno == ENOENT)
-			fprintf(stderr, "cuse: device not found, try 'modprobe cuse' first\n");
-		else
-			fprintf(stderr, "cuse: failed to open %s: %s\n",
-				devname, strerror(errno));
-		goto err_se;
-	}
-
-	ch = fuse_kern_chan_new(fd);
-	if (!ch) {
-		close(fd);
-		goto err_se;
-	}
-
-	fuse_session_add_chan(se, ch);
-
-	res = fuse_set_signal_handlers(se);
-	if (res == -1)
-		goto err_se;
-
-	res = fuse_daemonize(foreground);
-	if (res == -1)
-		goto err_sig;
-
-	return se;
-
-err_sig:
-	fuse_remove_signal_handlers(se);
-err_se:
-	fuse_session_destroy(se);
-err_args:
-	fuse_opt_free_args(&args);
-	return NULL;
-}
-
-void cuse_lowlevel_teardown(struct fuse_session *se)
-{
-	fuse_remove_signal_handlers(se);
-	fuse_session_destroy(se);
-}
-
-int cuse_lowlevel_main(int argc, char *argv[], const struct cuse_info *ci,
-		       const struct cuse_lowlevel_ops *clop, void *userdata)
-{
-	struct fuse_session *se;
-	int multithreaded;
-	int res;
-
-	se = cuse_lowlevel_setup(argc, argv, ci, clop, &multithreaded,
-				 userdata);
-	if (se == NULL)
-		return 1;
-
-	if (multithreaded)
-                res = fuse_session_loop_mt(se, 0);
-	else
-		res = fuse_session_loop(se);
-
-	cuse_lowlevel_teardown(se);
-	if (res == -1)
-		return 1;
-
-	return 0;
-}

libfuse/lib/debug.h

@@ -0,0 +1,51 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "fuse_kernel.h"
+
+void debug_fuse_open_out(const uint64_t              unique,
+                         const struct fuse_open_out *arg,
+                         const uint64_t              argsize);
+void debug_fuse_init_in(const struct fuse_init_in *arg);
+void debug_fuse_init_out(const uint64_t              unique,
+                         const struct fuse_init_out *arg,
+                         const uint64_t              argsize);
+void debug_fuse_entry_out(const uint64_t               unique,
+                          const struct fuse_entry_out *arg,
+                          const uint64_t               argsize);
+void debug_fuse_attr_out(const uint64_t              unique,
+                         const struct fuse_attr_out *arg,
+                         const uint64_t              argsize);
+void debug_fuse_entry_open_out(const uint64_t               unique,
+                               const struct fuse_entry_out *earg,
+                               const struct fuse_open_out  *oarg);
+void debug_fuse_readlink(const uint64_t  unique,
+                         const char     *linkname);
+void debug_fuse_write_out(const uint64_t               unique,
+                          const struct fuse_write_out *arg);
+void debug_fuse_statfs_out(const uint64_t                unique,
+                           const struct fuse_statfs_out *arg);
+void debug_fuse_getxattr_out(const uint64_t                  unique,
+                             const struct fuse_getxattr_out *arg);
+void debug_fuse_lk_out(const uint64_t            unique,
+                       const struct fuse_lk_out *arg);
+void debug_fuse_bmap_out(const uint64_t              unique,
+                         const struct fuse_bmap_out *arg);
+void debug_fuse_in_header(const struct fuse_in_header *hdr);

libfuse/lib/fmp.h

@@ -0,0 +1,380 @@
+/*
+  ISC License
+
+  Copyright (c) 2021, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "kvec.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#define ROUND_UP(N,S) ((((N) + (S) - 1) / (S)) * (S))
+
+typedef kvec_t(void*) slab_kvec_t;
+
+typedef struct mem_stack_t mem_stack_t;
+struct mem_stack_t
+{
+  mem_stack_t *next;
+};
+
+typedef struct fmp_t fmp_t;
+struct fmp_t
+{
+  mem_stack_t *objs;
+  slab_kvec_t  slabs;
+  uint64_t     avail_objs;
+  uint64_t     obj_size;
+  uint64_t     page_size;
+  uint64_t     slab_size;
+};
+
+static
+inline
+uint64_t
+fmp_page_size()
+{
+  return sysconf(_SC_PAGESIZE);
+}
+
+static
+inline
+void
+fmp_init(fmp_t          *fmp_,
+         const uint64_t  obj_size_,
+         const uint64_t  page_multiple_)
+{
+  kv_init(fmp_->slabs);
+  fmp_->objs       = NULL;
+  fmp_->avail_objs = 0;
+  fmp_->obj_size   = ROUND_UP(obj_size_,sizeof(void*));
+  fmp_->page_size  = fmp_page_size();
+  fmp_->slab_size  = (fmp_->page_size * page_multiple_);
+}
+
+static
+inline
+uint64_t
+fmp_slab_count(fmp_t *fmp_)
+{
+  return kv_size(fmp_->slabs);
+}
+
+static
+inline
+void*
+fmp_slab_alloc_posix_memalign(fmp_t *fmp_)
+{
+  int rv;
+  void *mem;
+  const size_t alignment = fmp_->page_size;
+  const size_t size      = fmp_->slab_size;
+
+  rv = posix_memalign(&mem,alignment,size);
+  if(rv != 0)
+    return NULL;
+
+  return NULL;
+}
+
+static
+inline
+void*
+fmp_slab_alloc_mmap(fmp_t *fmp_)
+{
+  void         *mem;
+  void         *address = NULL;
+  const size_t  length  = fmp_->slab_size;
+  const int     protect = PROT_READ|PROT_WRITE;
+  const int     flags   = MAP_PRIVATE|MAP_ANONYMOUS;
+  const int     filedes = -1;
+  const off_t   offset  = 0;
+
+  mem = mmap(address,length,protect,flags,filedes,offset);
+  if(mem == MAP_FAILED)
+    return NULL;
+
+  return mem;
+}
+
+static
+inline
+void
+fmp_slab_free_posix_memalign(fmp_t*  fmp_,
+                             void   *mem_)
+{
+  (void)fmp_;
+  free(mem_);
+}
+
+static
+inline
+void
+fmp_slab_free_mmap(fmp_t*  fmp_,
+                   void   *mem_)
+{
+  void   *addr   = mem_;
+  size_t  length = fmp_->slab_size;
+
+  (void)munmap(addr,length);
+}
+
+static
+inline
+int
+fmp_slab_alloc(fmp_t *fmp_)
+{
+  char *i;
+  void *mem;
+
+  mem = fmp_slab_alloc_mmap(fmp_);
+  if(mem == NULL)
+    return -ENOMEM;
+
+  kv_push(void*,fmp_->slabs,mem);
+
+  i = ((char*)mem + fmp_->slab_size - fmp_->obj_size);
+  while(i >= (char*)mem)
+    {
+      mem_stack_t *obj = (mem_stack_t*)i;
+
+      obj->next  = fmp_->objs;
+      fmp_->objs = obj;
+      fmp_->avail_objs++;
+
+      i -= fmp_->obj_size;
+    }
+
+  return 0;
+}
+
+static
+inline
+void*
+fmp_alloc(fmp_t *fmp_)
+{
+  void *rv;
+
+  if(fmp_->objs == NULL)
+    fmp_slab_alloc(fmp_);
+  if(fmp_->objs == NULL)
+    return NULL;
+
+  rv = fmp_->objs;
+
+  fmp_->objs = fmp_->objs->next;
+  fmp_->avail_objs--;
+
+  return rv;
+}
+
+static
+inline
+void*
+fmp_calloc(fmp_t *fmp_)
+{
+  void *obj;
+
+  obj = fmp_alloc(fmp_);
+  if(obj == NULL)
+    return NULL;
+
+  memset(obj,0,fmp_->obj_size);
+
+  return obj;
+}
+
+static
+inline
+void
+fmp_free(fmp_t *fmp_,
+         void  *obj_)
+{
+  mem_stack_t *obj = (mem_stack_t*)obj_;
+
+  obj->next  = fmp_->objs;
+  fmp_->objs = obj;
+  fmp_->avail_objs++;
+}
+
+static
+inline
+void
+fmp_clear(fmp_t *fmp_)
+{
+  while(kv_size(fmp_->slabs))
+    {
+      void *slab = kv_pop(fmp_->slabs);
+
+      fmp_slab_free_mmap(fmp_,slab);
+    }
+
+  fmp_->objs       = NULL;
+  fmp_->avail_objs = 0;
+}
+
+static
+inline
+void
+fmp_destroy(fmp_t *fmp_)
+{
+  fmp_clear(fmp_);
+  kv_destroy(fmp_->slabs);
+}
+
+static
+inline
+uint64_t
+fmp_avail_objs(fmp_t *fmp_)
+{
+  return fmp_->avail_objs;
+}
+
+static
+inline
+uint64_t
+fmp_objs_per_slab(fmp_t *fmp_)
+{
+  return (fmp_->slab_size / fmp_->obj_size);
+}
+
+static
+inline
+uint64_t
+fmp_objs_in_slab(fmp_t *fmp_,
+                 void  *slab_)
+{
+  char *slab;
+  uint64_t objs_per_slab;
+  uint64_t objs_in_slab;
+
+  slab          = (char*)slab_;
+  objs_in_slab  = 0;
+  objs_per_slab = fmp_objs_per_slab(fmp_);
+  for(mem_stack_t *stack = fmp_->objs; stack != NULL; stack = stack->next)
+    {
+      char *obj = (char*)stack;
+      if((obj >= slab) && (obj < (slab + fmp_->slab_size)))
+        objs_in_slab++;
+      if(objs_in_slab >= objs_per_slab)
+        break;
+    }
+
+  return objs_in_slab;
+}
+
+static
+inline
+void
+fmp_remove_objs_in_slab(fmp_t *fmp_,
+                        void  *slab_)
+{
+  char *slab;
+  uint64_t objs_per_slab;
+  uint64_t objs_in_slab;
+  mem_stack_t **p;
+
+  p             = &fmp_->objs;
+  slab          = (char*)slab_;
+  objs_in_slab  = 0;
+  objs_per_slab = fmp_objs_per_slab(fmp_);
+  while((*p) != NULL)
+    {
+      char *obj = (char*)*p;
+
+      if((obj >= slab) && (obj < (slab + fmp_->slab_size)))
+        {
+          objs_in_slab++;
+          *p = (*p)->next;
+          fmp_->avail_objs--;
+
+          if(objs_in_slab >= objs_per_slab)
+            break;
+          continue;
+        }
+
+      p = &(*p)->next;
+    }
+}
+
+static
+inline
+int
+fmp_gc_slab(fmp_t    *fmp_,
+            uint64_t  slab_idx_)
+{
+  char *slab;
+  uint64_t objs_in_slab;
+  uint64_t objs_per_slab;
+
+  slab_idx_ = (slab_idx_ % kv_size(fmp_->slabs));
+
+  slab = kv_A(fmp_->slabs,slab_idx_);
+
+  objs_per_slab = fmp_objs_per_slab(fmp_);
+  objs_in_slab  = fmp_objs_in_slab(fmp_,slab);
+  if(objs_in_slab != objs_per_slab)
+    return 0;
+
+  fmp_remove_objs_in_slab(fmp_,slab);
+  kv_delete(fmp_->slabs,slab_idx_);
+  fmp_slab_free_mmap(fmp_,slab);
+
+  return 1;
+}
+
+
+static
+inline
+int
+fmp_gc(fmp_t *fmp_)
+{
+  uint64_t slab_idx;
+
+  slab_idx = rand();
+
+  return fmp_gc_slab(fmp_,slab_idx);
+}
+
+static
+inline
+double
+fmp_slab_usage_ratio(fmp_t *fmp_)
+{
+  double avail_objs;
+  double objs_per_slab;
+  double nums_of_slabs;
+
+  avail_objs    = fmp_->avail_objs;
+  objs_per_slab = fmp_objs_per_slab(fmp_);
+  nums_of_slabs = kv_size(fmp_->slabs);
+
+  return (avail_objs / (objs_per_slab * nums_of_slabs));
+}
+
+static
+inline
+uint64_t
+fmp_total_allocated_memory(fmp_t *fmp_)
+{
+  return (fmp_->slab_size * kv_size(fmp_->slabs));
+}

libfuse/lib/fmt/args.h

@@ -0,0 +1,234 @@
+// Formatting library for C++ - dynamic format arguments
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_ARGS_H_
+#define FMT_ARGS_H_
+
+#include <functional>  // std::reference_wrapper
+#include <memory>      // std::unique_ptr
+#include <vector>
+
+#include "core.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> const T& unwrap(const T& v) { return v; }
+template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
+  return static_cast<const T&>(v);
+}
+
+class dynamic_arg_list {
+  // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+  // templates it doesn't complain about inability to deduce single translation
+  // unit for placing vtable. So storage_node_base is made a fake template.
+  template <typename = void> struct node {
+    virtual ~node() = default;
+    std::unique_ptr<node<>> next;
+  };
+
+  template <typename T> struct typed_node : node<> {
+    T value;
+
+    template <typename Arg>
+    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+    template <typename Char>
+    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+        : value(arg.data(), arg.size()) {}
+  };
+
+  std::unique_ptr<node<>> head_;
+
+ public:
+  template <typename T, typename Arg> const T& push(const Arg& arg) {
+    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+    auto& value = new_node->value;
+    new_node->next = std::move(head_);
+    head_ = std::move(new_node);
+    return value;
+  }
+};
+}  // namespace detail
+
+/**
+  \rst
+  A dynamic version of `fmt::format_arg_store`.
+  It's equipped with a storage to potentially temporary objects which lifetimes
+  could be shorter than the format arguments object.
+
+  It can be implicitly converted into `~fmt::basic_format_args` for passing
+  into type-erased formatting functions such as `~fmt::vformat`.
+  \endrst
+ */
+template <typename Context>
+class dynamic_format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+    // Workaround a GCC template argument substitution bug.
+    : public basic_format_args<Context>
+#endif
+{
+ private:
+  using char_type = typename Context::char_type;
+
+  template <typename T> struct need_copy {
+    static constexpr detail::type mapped_type =
+        detail::mapped_type_constant<T, Context>::value;
+
+    enum {
+      value = !(detail::is_reference_wrapper<T>::value ||
+                std::is_same<T, basic_string_view<char_type>>::value ||
+                std::is_same<T, detail::std_string_view<char_type>>::value ||
+                (mapped_type != detail::type::cstring_type &&
+                 mapped_type != detail::type::string_type &&
+                 mapped_type != detail::type::custom_type))
+    };
+  };
+
+  template <typename T>
+  using stored_type = conditional_t<
+      std::is_convertible<T, std::basic_string<char_type>>::value &&
+          !detail::is_reference_wrapper<T>::value,
+      std::basic_string<char_type>, T>;
+
+  // Storage of basic_format_arg must be contiguous.
+  std::vector<basic_format_arg<Context>> data_;
+  std::vector<detail::named_arg_info<char_type>> named_info_;
+
+  // Storage of arguments not fitting into basic_format_arg must grow
+  // without relocation because items in data_ refer to it.
+  detail::dynamic_arg_list dynamic_args_;
+
+  friend class basic_format_args<Context>;
+
+  unsigned long long get_types() const {
+    return detail::is_unpacked_bit | data_.size() |
+           (named_info_.empty()
+                ? 0ULL
+                : static_cast<unsigned long long>(detail::has_named_args_bit));
+  }
+
+  const basic_format_arg<Context>* data() const {
+    return named_info_.empty() ? data_.data() : data_.data() + 1;
+  }
+
+  template <typename T> void emplace_arg(const T& arg) {
+    data_.emplace_back(detail::make_arg<Context>(arg));
+  }
+
+  template <typename T>
+  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+    if (named_info_.empty()) {
+      constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
+      data_.insert(data_.begin(), {zero_ptr, 0});
+    }
+    data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
+    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+      data->pop_back();
+    };
+    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+        guard{&data_, pop_one};
+    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+    data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
+    guard.release();
+  }
+
+ public:
+  constexpr dynamic_format_arg_store() = default;
+
+  /**
+    \rst
+    Adds an argument into the dynamic store for later passing to a formatting
+    function.
+
+    Note that custom types and string types (but not string views) are copied
+    into the store dynamically allocating memory if necessary.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      store.push_back(42);
+      store.push_back("abc");
+      store.push_back(1.5f);
+      std::string result = fmt::vformat("{} and {} and {}", store);
+    \endrst
+  */
+  template <typename T> void push_back(const T& arg) {
+    if (detail::const_check(need_copy<T>::value))
+      emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
+    else
+      emplace_arg(detail::unwrap(arg));
+  }
+
+  /**
+    \rst
+    Adds a reference to the argument into the dynamic store for later passing to
+    a formatting function.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      char band[] = "Rolling Stones";
+      store.push_back(std::cref(band));
+      band[9] = 'c'; // Changing str affects the output.
+      std::string result = fmt::vformat("{}", store);
+      // result == "Rolling Scones"
+    \endrst
+  */
+  template <typename T> void push_back(std::reference_wrapper<T> arg) {
+    static_assert(
+        need_copy<T>::value,
+        "objects of built-in types and string views are always copied");
+    emplace_arg(arg.get());
+  }
+
+  /**
+    Adds named argument into the dynamic store for later passing to a formatting
+    function. ``std::reference_wrapper`` is supported to avoid copying of the
+    argument. The name is always copied into the store.
+  */
+  template <typename T>
+  void push_back(const detail::named_arg<char_type, T>& arg) {
+    const char_type* arg_name =
+        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+    if (detail::const_check(need_copy<T>::value)) {
+      emplace_arg(
+          fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
+    } else {
+      emplace_arg(fmt::arg(arg_name, arg.value));
+    }
+  }
+
+  /** Erase all elements from the store */
+  void clear() {
+    data_.clear();
+    named_info_.clear();
+    dynamic_args_ = detail::dynamic_arg_list();
+  }
+
+  /**
+    \rst
+    Reserves space to store at least *new_cap* arguments including
+    *new_cap_named* named arguments.
+    \endrst
+  */
+  void reserve(size_t new_cap, size_t new_cap_named) {
+    FMT_ASSERT(new_cap >= new_cap_named,
+               "Set of arguments includes set of named arguments");
+    data_.reserve(new_cap);
+    named_info_.reserve(new_cap_named);
+  }
+};
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_ARGS_H_

libfuse/lib/fmt/color.h

@@ -0,0 +1,651 @@
+// Formatting library for C++ - color support
+//
+// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COLOR_H_
+#define FMT_COLOR_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+enum class color : uint32_t {
+  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
+  antique_white = 0xFAEBD7,            // rgb(250,235,215)
+  aqua = 0x00FFFF,                     // rgb(0,255,255)
+  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
+  azure = 0xF0FFFF,                    // rgb(240,255,255)
+  beige = 0xF5F5DC,                    // rgb(245,245,220)
+  bisque = 0xFFE4C4,                   // rgb(255,228,196)
+  black = 0x000000,                    // rgb(0,0,0)
+  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
+  blue = 0x0000FF,                     // rgb(0,0,255)
+  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
+  brown = 0xA52A2A,                    // rgb(165,42,42)
+  burly_wood = 0xDEB887,               // rgb(222,184,135)
+  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
+  chartreuse = 0x7FFF00,               // rgb(127,255,0)
+  chocolate = 0xD2691E,                // rgb(210,105,30)
+  coral = 0xFF7F50,                    // rgb(255,127,80)
+  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
+  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
+  crimson = 0xDC143C,                  // rgb(220,20,60)
+  cyan = 0x00FFFF,                     // rgb(0,255,255)
+  dark_blue = 0x00008B,                // rgb(0,0,139)
+  dark_cyan = 0x008B8B,                // rgb(0,139,139)
+  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
+  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
+  dark_green = 0x006400,               // rgb(0,100,0)
+  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
+  dark_magenta = 0x8B008B,             // rgb(139,0,139)
+  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
+  dark_orange = 0xFF8C00,              // rgb(255,140,0)
+  dark_orchid = 0x9932CC,              // rgb(153,50,204)
+  dark_red = 0x8B0000,                 // rgb(139,0,0)
+  dark_salmon = 0xE9967A,              // rgb(233,150,122)
+  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
+  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
+  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
+  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
+  dark_violet = 0x9400D3,              // rgb(148,0,211)
+  deep_pink = 0xFF1493,                // rgb(255,20,147)
+  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
+  dim_gray = 0x696969,                 // rgb(105,105,105)
+  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
+  fire_brick = 0xB22222,               // rgb(178,34,34)
+  floral_white = 0xFFFAF0,             // rgb(255,250,240)
+  forest_green = 0x228B22,             // rgb(34,139,34)
+  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
+  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
+  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
+  gold = 0xFFD700,                     // rgb(255,215,0)
+  golden_rod = 0xDAA520,               // rgb(218,165,32)
+  gray = 0x808080,                     // rgb(128,128,128)
+  green = 0x008000,                    // rgb(0,128,0)
+  green_yellow = 0xADFF2F,             // rgb(173,255,47)
+  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
+  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
+  indian_red = 0xCD5C5C,               // rgb(205,92,92)
+  indigo = 0x4B0082,                   // rgb(75,0,130)
+  ivory = 0xFFFFF0,                    // rgb(255,255,240)
+  khaki = 0xF0E68C,                    // rgb(240,230,140)
+  lavender = 0xE6E6FA,                 // rgb(230,230,250)
+  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
+  lawn_green = 0x7CFC00,               // rgb(124,252,0)
+  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
+  light_blue = 0xADD8E6,               // rgb(173,216,230)
+  light_coral = 0xF08080,              // rgb(240,128,128)
+  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
+  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
+  light_gray = 0xD3D3D3,               // rgb(211,211,211)
+  light_green = 0x90EE90,              // rgb(144,238,144)
+  light_pink = 0xFFB6C1,               // rgb(255,182,193)
+  light_salmon = 0xFFA07A,             // rgb(255,160,122)
+  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
+  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
+  light_slate_gray = 0x778899,         // rgb(119,136,153)
+  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
+  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
+  lime = 0x00FF00,                     // rgb(0,255,0)
+  lime_green = 0x32CD32,               // rgb(50,205,50)
+  linen = 0xFAF0E6,                    // rgb(250,240,230)
+  magenta = 0xFF00FF,                  // rgb(255,0,255)
+  maroon = 0x800000,                   // rgb(128,0,0)
+  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
+  medium_blue = 0x0000CD,              // rgb(0,0,205)
+  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
+  medium_purple = 0x9370DB,            // rgb(147,112,219)
+  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
+  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
+  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
+  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
+  medium_violet_red = 0xC71585,        // rgb(199,21,133)
+  midnight_blue = 0x191970,            // rgb(25,25,112)
+  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
+  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
+  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
+  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
+  navy = 0x000080,                     // rgb(0,0,128)
+  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
+  olive = 0x808000,                    // rgb(128,128,0)
+  olive_drab = 0x6B8E23,               // rgb(107,142,35)
+  orange = 0xFFA500,                   // rgb(255,165,0)
+  orange_red = 0xFF4500,               // rgb(255,69,0)
+  orchid = 0xDA70D6,                   // rgb(218,112,214)
+  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
+  pale_green = 0x98FB98,               // rgb(152,251,152)
+  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
+  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
+  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
+  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
+  peru = 0xCD853F,                     // rgb(205,133,63)
+  pink = 0xFFC0CB,                     // rgb(255,192,203)
+  plum = 0xDDA0DD,                     // rgb(221,160,221)
+  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
+  purple = 0x800080,                   // rgb(128,0,128)
+  rebecca_purple = 0x663399,           // rgb(102,51,153)
+  red = 0xFF0000,                      // rgb(255,0,0)
+  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
+  royal_blue = 0x4169E1,               // rgb(65,105,225)
+  saddle_brown = 0x8B4513,             // rgb(139,69,19)
+  salmon = 0xFA8072,                   // rgb(250,128,114)
+  sandy_brown = 0xF4A460,              // rgb(244,164,96)
+  sea_green = 0x2E8B57,                // rgb(46,139,87)
+  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
+  sienna = 0xA0522D,                   // rgb(160,82,45)
+  silver = 0xC0C0C0,                   // rgb(192,192,192)
+  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
+  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
+  slate_gray = 0x708090,               // rgb(112,128,144)
+  snow = 0xFFFAFA,                     // rgb(255,250,250)
+  spring_green = 0x00FF7F,             // rgb(0,255,127)
+  steel_blue = 0x4682B4,               // rgb(70,130,180)
+  tan = 0xD2B48C,                      // rgb(210,180,140)
+  teal = 0x008080,                     // rgb(0,128,128)
+  thistle = 0xD8BFD8,                  // rgb(216,191,216)
+  tomato = 0xFF6347,                   // rgb(255,99,71)
+  turquoise = 0x40E0D0,                // rgb(64,224,208)
+  violet = 0xEE82EE,                   // rgb(238,130,238)
+  wheat = 0xF5DEB3,                    // rgb(245,222,179)
+  white = 0xFFFFFF,                    // rgb(255,255,255)
+  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
+  yellow = 0xFFFF00,                   // rgb(255,255,0)
+  yellow_green = 0x9ACD32              // rgb(154,205,50)
+};                                     // enum class color
+
+enum class terminal_color : uint8_t {
+  black = 30,
+  red,
+  green,
+  yellow,
+  blue,
+  magenta,
+  cyan,
+  white,
+  bright_black = 90,
+  bright_red,
+  bright_green,
+  bright_yellow,
+  bright_blue,
+  bright_magenta,
+  bright_cyan,
+  bright_white
+};
+
+enum class emphasis : uint8_t {
+  bold = 1,
+  faint = 1 << 1,
+  italic = 1 << 2,
+  underline = 1 << 3,
+  blink = 1 << 4,
+  reverse = 1 << 5,
+  conceal = 1 << 6,
+  strikethrough = 1 << 7,
+};
+
+// rgb is a struct for red, green and blue colors.
+// Using the name "rgb" makes some editors show the color in a tooltip.
+struct rgb {
+  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
+  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
+  FMT_CONSTEXPR rgb(uint32_t hex)
+      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
+  FMT_CONSTEXPR rgb(color hex)
+      : r((uint32_t(hex) >> 16) & 0xFF),
+        g((uint32_t(hex) >> 8) & 0xFF),
+        b(uint32_t(hex) & 0xFF) {}
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// color is a struct of either a rgb color or a terminal color.
+struct color_type {
+  FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {}
+  FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} {
+    value.rgb_color = static_cast<uint32_t>(rgb_color);
+  }
+  FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} {
+    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
+                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
+  }
+  FMT_CONSTEXPR color_type(terminal_color term_color) noexcept
+      : is_rgb(), value{} {
+    value.term_color = static_cast<uint8_t>(term_color);
+  }
+  bool is_rgb;
+  union color_union {
+    uint8_t term_color;
+    uint32_t rgb_color;
+  } value;
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+/** A text style consisting of foreground and background colors and emphasis. */
+class text_style {
+ public:
+  FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept
+      : set_foreground_color(), set_background_color(), ems(em) {}
+
+  FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't OR a terminal color"));
+      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
+  friend FMT_CONSTEXPR text_style operator|(text_style lhs,
+                                            const text_style& rhs) {
+    return lhs |= rhs;
+  }
+
+  FMT_CONSTEXPR bool has_foreground() const noexcept {
+    return set_foreground_color;
+  }
+  FMT_CONSTEXPR bool has_background() const noexcept {
+    return set_background_color;
+  }
+  FMT_CONSTEXPR bool has_emphasis() const noexcept {
+    return static_cast<uint8_t>(ems) != 0;
+  }
+  FMT_CONSTEXPR detail::color_type get_foreground() const noexcept {
+    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
+    return foreground_color;
+  }
+  FMT_CONSTEXPR detail::color_type get_background() const noexcept {
+    FMT_ASSERT(has_background(), "no background specified for this style");
+    return background_color;
+  }
+  FMT_CONSTEXPR emphasis get_emphasis() const noexcept {
+    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
+    return ems;
+  }
+
+ private:
+  FMT_CONSTEXPR text_style(bool is_foreground,
+                           detail::color_type text_color) noexcept
+      : set_foreground_color(), set_background_color(), ems() {
+    if (is_foreground) {
+      foreground_color = text_color;
+      set_foreground_color = true;
+    } else {
+      background_color = text_color;
+      set_background_color = true;
+    }
+  }
+
+  friend FMT_CONSTEXPR text_style fg(detail::color_type foreground) noexcept;
+
+  friend FMT_CONSTEXPR text_style bg(detail::color_type background) noexcept;
+
+  detail::color_type foreground_color;
+  detail::color_type background_color;
+  bool set_foreground_color;
+  bool set_background_color;
+  emphasis ems;
+};
+
+/** Creates a text style from the foreground (text) color. */
+FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) noexcept {
+  return text_style(true, foreground);
+}
+
+/** Creates a text style from the background color. */
+FMT_CONSTEXPR inline text_style bg(detail::color_type background) noexcept {
+  return text_style(false, background);
+}
+
+FMT_CONSTEXPR inline text_style operator|(emphasis lhs, emphasis rhs) noexcept {
+  return text_style(lhs) | rhs;
+}
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+template <typename Char> struct ansi_color_escape {
+  FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
+                                  const char* esc) noexcept {
+    // If we have a terminal color, we need to output another escape code
+    // sequence.
+    if (!text_color.is_rgb) {
+      bool is_background = esc == string_view("\x1b[48;2;");
+      uint32_t value = text_color.value.term_color;
+      // Background ASCII codes are the same as the foreground ones but with
+      // 10 more.
+      if (is_background) value += 10u;
+
+      size_t index = 0;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+
+      if (value >= 100u) {
+        buffer[index++] = static_cast<Char>('1');
+        value %= 100u;
+      }
+      buffer[index++] = static_cast<Char>('0' + value / 10u);
+      buffer[index++] = static_cast<Char>('0' + value % 10u);
+
+      buffer[index++] = static_cast<Char>('m');
+      buffer[index++] = static_cast<Char>('\0');
+      return;
+    }
+
+    for (int i = 0; i < 7; i++) {
+      buffer[i] = static_cast<Char>(esc[i]);
+    }
+    rgb color(text_color.value.rgb_color);
+    to_esc(color.r, buffer + 7, ';');
+    to_esc(color.g, buffer + 11, ';');
+    to_esc(color.b, buffer + 15, 'm');
+    buffer[19] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept {
+    uint8_t em_codes[num_emphases] = {};
+    if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
+    if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
+    if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
+    if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
+    if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
+    if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
+    if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
+    if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
+
+    size_t index = 0;
+    for (size_t i = 0; i < num_emphases; ++i) {
+      if (!em_codes[i]) continue;
+      buffer[index++] = static_cast<Char>('\x1b');
+      buffer[index++] = static_cast<Char>('[');
+      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
+      buffer[index++] = static_cast<Char>('m');
+    }
+    buffer[index++] = static_cast<Char>(0);
+  }
+  FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; }
+
+  FMT_CONSTEXPR const Char* begin() const noexcept { return buffer; }
+  FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const noexcept {
+    return buffer + std::char_traits<Char>::length(buffer);
+  }
+
+ private:
+  static constexpr size_t num_emphases = 8;
+  Char buffer[7u + 3u * num_emphases + 1u];
+
+  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
+                                   char delimiter) noexcept {
+    out[0] = static_cast<Char>('0' + c / 100);
+    out[1] = static_cast<Char>('0' + c / 10 % 10);
+    out[2] = static_cast<Char>('0' + c % 10);
+    out[3] = static_cast<Char>(delimiter);
+  }
+  static FMT_CONSTEXPR bool has_emphasis(emphasis em, emphasis mask) noexcept {
+    return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
+  }
+};
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
+    detail::color_type foreground) noexcept {
+  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
+    detail::color_type background) noexcept {
+  return ansi_color_escape<Char>(background, "\x1b[48;2;");
+}
+
+template <typename Char>
+FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) noexcept {
+  return ansi_color_escape<Char>(em);
+}
+
+template <typename Char> inline void fputs(const Char* chars, FILE* stream) {
+  int result = std::fputs(chars, stream);
+  if (result < 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+template <> inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) {
+  int result = std::fputws(chars, stream);
+  if (result < 0)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+template <typename Char> inline void reset_color(FILE* stream) {
+  fputs("\x1b[0m", stream);
+}
+
+template <> inline void reset_color<wchar_t>(FILE* stream) {
+  fputs(L"\x1b[0m", stream);
+}
+
+template <typename Char> inline void reset_color(buffer<Char>& buffer) {
+  auto reset_color = string_view("\x1b[0m");
+  buffer.append(reset_color.begin(), reset_color.end());
+}
+
+template <typename T> struct styled_arg {
+  const T& value;
+  text_style style;
+};
+
+template <typename Char>
+void vformat_to(buffer<Char>& buf, const text_style& ts,
+                basic_string_view<Char> format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  bool has_style = false;
+  if (ts.has_emphasis()) {
+    has_style = true;
+    auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+    buf.append(emphasis.begin(), emphasis.end());
+  }
+  if (ts.has_foreground()) {
+    has_style = true;
+    auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
+    buf.append(foreground.begin(), foreground.end());
+  }
+  if (ts.has_background()) {
+    has_style = true;
+    auto background = detail::make_background_color<Char>(ts.get_background());
+    buf.append(background.begin(), background.end());
+  }
+  detail::vformat_to(buf, format_str, args, {});
+  if (has_style) detail::reset_color<Char>(buf);
+}
+
+FMT_END_DETAIL_NAMESPACE
+
+template <typename S, typename Char = char_t<S>>
+void vprint(std::FILE* f, const text_style& ts, const S& format,
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, detail::to_string_view(format), args);
+  if (detail::is_utf8()) {
+    detail::print(f, basic_string_view<Char>(buf.begin(), buf.size()));
+  } else {
+    buf.push_back(Char(0));
+    detail::fputs(buf.data(), f);
+  }
+}
+
+/**
+  \rst
+  Formats a string and prints it to the specified file stream using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(std::FILE* f, const text_style& ts, const S& format_str,
+           const Args&... args) {
+  vprint(f, ts, format_str,
+         fmt::make_format_args<buffer_context<char_t<S>>>(args...));
+}
+
+/**
+  \rst
+  Formats a string and prints it to stdout using ANSI escape sequences to
+  specify text formatting.
+
+  **Example**::
+
+    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
+               "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_string<S>::value)>
+void print(const text_style& ts, const S& format_str, const Args&... args) {
+  return print(stdout, ts, format_str, args...);
+}
+
+template <typename S, typename Char = char_t<S>>
+inline std::basic_string<Char> vformat(
+    const text_style& ts, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  basic_memory_buffer<Char> buf;
+  detail::vformat_to(buf, ts, detail::to_string_view(format_str), args);
+  return fmt::to_string(buf);
+}
+
+/**
+  \rst
+  Formats arguments and returns the result as a string using ANSI
+  escape sequences to specify text formatting.
+
+  **Example**::
+
+    #include <fmt/color.h>
+    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
+                                      "The answer is {}", 42);
+  \endrst
+*/
+template <typename S, typename... Args, typename Char = char_t<S>>
+inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
+                                      const Args&... args) {
+  return fmt::vformat(ts, detail::to_string_view(format_str),
+                      fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+/**
+  Formats a string with the given text_style and writes the output to ``out``.
+ */
+template <typename OutputIt, typename Char,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
+OutputIt vformat_to(
+    OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  auto&& buf = detail::get_buffer<Char>(out);
+  detail::vformat_to(buf, ts, format_str, args);
+  return detail::get_iterator(buf);
+}
+
+/**
+  \rst
+  Formats arguments with the given text_style, writes the result to the output
+  iterator ``out`` and returns the iterator past the end of the output range.
+
+  **Example**::
+
+    std::vector<char> out;
+    fmt::format_to(std::back_inserter(out),
+                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
+  \endrst
+*/
+template <typename OutputIt, typename S, typename... Args,
+          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
+              detail::is_string<S>::value>
+inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  return vformat_to(out, ts, detail::to_string_view(format_str),
+                    fmt::make_format_args<buffer_context<char_t<S>>>(args...));
+}
+
+template <typename T, typename Char>
+struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
+  template <typename FormatContext>
+  auto format(const detail::styled_arg<T>& arg, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    const auto& ts = arg.style;
+    const auto& value = arg.value;
+    auto out = ctx.out();
+
+    bool has_style = false;
+    if (ts.has_emphasis()) {
+      has_style = true;
+      auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
+      out = std::copy(emphasis.begin(), emphasis.end(), out);
+    }
+    if (ts.has_foreground()) {
+      has_style = true;
+      auto foreground =
+          detail::make_foreground_color<Char>(ts.get_foreground());
+      out = std::copy(foreground.begin(), foreground.end(), out);
+    }
+    if (ts.has_background()) {
+      has_style = true;
+      auto background =
+          detail::make_background_color<Char>(ts.get_background());
+      out = std::copy(background.begin(), background.end(), out);
+    }
+    out = formatter<T, Char>::format(value, ctx);
+    if (has_style) {
+      auto reset_color = string_view("\x1b[0m");
+      out = std::copy(reset_color.begin(), reset_color.end(), out);
+    }
+    return out;
+  }
+};
+
+/**
+  \rst
+  Returns an argument that will be formatted using ANSI escape sequences,
+  to be used in a formatting function.
+
+  **Example**::
+
+    fmt::print("Elapsed time: {0:.2f} seconds",
+               fmt::styled(1.23, fmt::fg(fmt::color::green) |
+                                 fmt::bg(fmt::color::blue)));
+  \endrst
+ */
+template <typename T>
+FMT_CONSTEXPR auto styled(const T& value, text_style ts)
+    -> detail::styled_arg<remove_cvref_t<T>> {
+  return detail::styled_arg<remove_cvref_t<T>>{value, ts};
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_COLOR_H_

libfuse/lib/fmt/compile.h

@@ -0,0 +1,611 @@
+// Formatting library for C++ - experimental format string compilation
+//
+// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_COMPILE_H_
+#define FMT_COMPILE_H_
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template <typename Char, typename InputIt>
+FMT_CONSTEXPR inline counting_iterator copy_str(InputIt begin, InputIt end,
+                                                counting_iterator it) {
+  return it + (end - begin);
+}
+
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+  OutputIt out_;
+  size_t limit_;
+  size_t count_ = 0;
+
+  truncating_iterator_base() : out_(), limit_(0) {}
+
+  truncating_iterator_base(OutputIt out, size_t limit)
+      : out_(out), limit_(limit) {}
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using value_type = typename std::iterator_traits<OutputIt>::value_type;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  FMT_UNCHECKED_ITERATOR(truncating_iterator_base);
+
+  OutputIt base() const { return out_; }
+  size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+          typename Enable = typename std::is_void<
+              typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+    : public truncating_iterator_base<OutputIt> {
+  mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
+
+ public:
+  using value_type = typename truncating_iterator_base<OutputIt>::value_type;
+
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  truncating_iterator& operator++() {
+    if (this->count_++ < this->limit_) ++this->out_;
+    return *this;
+  }
+
+  truncating_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  value_type& operator*() const {
+    return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+  }
+};
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+    : public truncating_iterator_base<OutputIt> {
+ public:
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  template <typename T> truncating_iterator& operator=(T val) {
+    if (this->count_++ < this->limit_) *this->out_++ = val;
+    return *this;
+  }
+
+  truncating_iterator& operator++() { return *this; }
+  truncating_iterator& operator++(int) { return *this; }
+  truncating_iterator& operator*() { return *this; }
+};
+
+// A compile-time string which is compiled into fast formatting code.
+class compiled_string {};
+
+template <typename S>
+struct is_compiled_string : std::is_base_of<compiled_string, S> {};
+
+/**
+  \rst
+  Converts a string literal *s* into a format string that will be parsed at
+  compile time and converted into efficient formatting code. Requires C++17
+  ``constexpr if`` compiler support.
+
+  **Example**::
+
+    // Converts 42 into std::string using the most efficient method and no
+    // runtime format string processing.
+    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
+  \endrst
+ */
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+#  define FMT_COMPILE(s) \
+    FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
+#else
+#  define FMT_COMPILE(s) FMT_STRING(s)
+#endif
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+template <typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_compiled_string : compiled_string {
+  using char_type = Char;
+  explicit constexpr operator basic_string_view<char_type>() const {
+    return {Str.data, N - 1};
+  }
+};
+#endif
+
+template <typename T, typename... Tail>
+const T& first(const T& value, const Tail&...) {
+  return value;
+}
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+template <typename... Args> struct type_list {};
+
+// Returns a reference to the argument at index N from [first, rest...].
+template <int N, typename T, typename... Args>
+constexpr const auto& get([[maybe_unused]] const T& first,
+                          [[maybe_unused]] const Args&... rest) {
+  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
+  if constexpr (N == 0)
+    return first;
+  else
+    return detail::get<N - 1>(rest...);
+}
+
+template <typename Char, typename... Args>
+constexpr int get_arg_index_by_name(basic_string_view<Char> name,
+                                    type_list<Args...>) {
+  return get_arg_index_by_name<Args...>(name);
+}
+
+template <int N, typename> struct get_type_impl;
+
+template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
+  using type =
+      remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
+};
+
+template <int N, typename T>
+using get_type = typename get_type_impl<N, T>::type;
+
+template <typename T> struct is_compiled_format : std::false_type {};
+
+template <typename Char> struct text {
+  basic_string_view<Char> data;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, data);
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<text<Char>> : std::true_type {};
+
+template <typename Char>
+constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
+                               size_t size) {
+  return {{&s[pos], size}};
+}
+
+template <typename Char> struct code_unit {
+  Char value;
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
+    return write<Char>(out, value);
+  }
+};
+
+// This ensures that the argument type is convertible to `const T&`.
+template <typename T, int N, typename... Args>
+constexpr const T& get_arg_checked(const Args&... args) {
+  const auto& arg = detail::get<N>(args...);
+  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
+    return arg.value;
+  } else {
+    return arg;
+  }
+}
+
+template <typename Char>
+struct is_compiled_format<code_unit<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N.
+template <typename Char, typename T, int N> struct field {
+  using char_type = Char;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    return write<Char>(out, get_arg_checked<T, N>(args...));
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<field<Char, T, N>> : std::true_type {};
+
+// A replacement field that refers to argument with name.
+template <typename Char> struct runtime_named_field {
+  using char_type = Char;
+  basic_string_view<Char> name;
+
+  template <typename OutputIt, typename T>
+  constexpr static bool try_format_argument(
+      OutputIt& out,
+      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
+    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
+      if (arg_name == arg.name) {
+        out = write<Char>(out, arg.value);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    bool found = (try_format_argument(out, name, args) || ...);
+    if (!found) {
+      FMT_THROW(format_error("argument with specified name is not found"));
+    }
+    return out;
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
+
+// A replacement field that refers to argument N and has format specifiers.
+template <typename Char, typename T, int N> struct spec_field {
+  using char_type = Char;
+  formatter<T, Char> fmt;
+
+  template <typename OutputIt, typename... Args>
+  constexpr FMT_INLINE OutputIt format(OutputIt out,
+                                       const Args&... args) const {
+    const auto& vargs =
+        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
+    basic_format_context<OutputIt, Char> ctx(out, vargs);
+    return fmt.format(get_arg_checked<T, N>(args...), ctx);
+  }
+};
+
+template <typename Char, typename T, int N>
+struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
+
+template <typename L, typename R> struct concat {
+  L lhs;
+  R rhs;
+  using char_type = typename L::char_type;
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    out = lhs.format(out, args...);
+    return rhs.format(out, args...);
+  }
+};
+
+template <typename L, typename R>
+struct is_compiled_format<concat<L, R>> : std::true_type {};
+
+template <typename L, typename R>
+constexpr concat<L, R> make_concat(L lhs, R rhs) {
+  return {lhs, rhs};
+}
+
+struct unknown_format {};
+
+template <typename Char>
+constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
+  for (size_t size = str.size(); pos != size; ++pos) {
+    if (str[pos] == '{' || str[pos] == '}') break;
+  }
+  return pos;
+}
+
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str);
+
+template <typename Args, size_t POS, int ID, typename T, typename S>
+constexpr auto parse_tail(T head, S format_str) {
+  if constexpr (POS !=
+                basic_string_view<typename S::char_type>(format_str).size()) {
+    constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
+    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
+                               unknown_format>())
+      return tail;
+    else
+      return make_concat(head, tail);
+  } else {
+    return head;
+  }
+}
+
+template <typename T, typename Char> struct parse_specs_result {
+  formatter<T, Char> fmt;
+  size_t end;
+  int next_arg_id;
+};
+
+constexpr int manual_indexing_id = -1;
+
+template <typename T, typename Char>
+constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
+                                                  size_t pos, int next_arg_id) {
+  str.remove_prefix(pos);
+  auto ctx = compile_parse_context<Char>(str, max_value<int>(), nullptr, {},
+                                         next_arg_id);
+  auto f = formatter<T, Char>();
+  auto end = f.parse(ctx);
+  return {f, pos + fmt::detail::to_unsigned(end - str.data()),
+          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
+}
+
+template <typename Char> struct arg_id_handler {
+  arg_ref<Char> arg_id;
+
+  constexpr int operator()() {
+    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
+    return 0;
+  }
+  constexpr int operator()(int id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+  constexpr int operator()(basic_string_view<Char> id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+
+  constexpr void on_error(const char* message) {
+    FMT_THROW(format_error(message));
+  }
+};
+
+template <typename Char> struct parse_arg_id_result {
+  arg_ref<Char> arg_id;
+  const Char* arg_id_end;
+};
+
+template <int ID, typename Char>
+constexpr auto parse_arg_id(const Char* begin, const Char* end) {
+  auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
+  auto arg_id_end = parse_arg_id(begin, end, handler);
+  return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
+}
+
+template <typename T, typename Enable = void> struct field_type {
+  using type = remove_cvref_t<T>;
+};
+
+template <typename T>
+struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
+  using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
+          typename S>
+constexpr auto parse_replacement_field_then_tail(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(format_str);
+  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
+  if constexpr (c == '}') {
+    return parse_tail<Args, END_POS + 1, NEXT_ID>(
+        field<char_type, typename field_type<T>::type, ARG_INDEX>(),
+        format_str);
+  } else if constexpr (c != ':') {
+    FMT_THROW(format_error("expected ':'"));
+  } else {
+    constexpr auto result = parse_specs<typename field_type<T>::type>(
+        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
+    if constexpr (result.end >= str.size() || str[result.end] != '}') {
+      FMT_THROW(format_error("expected '}'"));
+      return 0;
+    } else {
+      return parse_tail<Args, result.end + 1, result.next_arg_id>(
+          spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
+              result.fmt},
+          format_str);
+    }
+  }
+}
+
+// Compiles a non-empty format string and returns the compiled representation
+// or unknown_format() on unrecognized input.
+template <typename Args, size_t POS, int ID, typename S>
+constexpr auto compile_format_string(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(format_str);
+  if constexpr (str[POS] == '{') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '{' in format string"));
+    if constexpr (str[POS + 1] == '{') {
+      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
+      static_assert(ID != manual_indexing_id,
+                    "cannot switch from manual to automatic argument indexing");
+      constexpr auto next_id =
+          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
+                                               POS + 1, ID, next_id>(
+          format_str);
+    } else {
+      constexpr auto arg_id_result =
+          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
+      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
+      constexpr char_type c =
+          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
+      static_assert(c == '}' || c == ':', "missing '}' in format string");
+      if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
+        static_assert(
+            ID == manual_indexing_id || ID == 0,
+            "cannot switch from automatic to manual argument indexing");
+        constexpr auto arg_index = arg_id_result.arg_id.val.index;
+        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
+                                                 Args, arg_id_end_pos,
+                                                 arg_index, manual_indexing_id>(
+            format_str);
+      } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
+        constexpr auto arg_index =
+            get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
+        if constexpr (arg_index != invalid_arg_index) {
+          constexpr auto next_id =
+              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+          return parse_replacement_field_then_tail<
+              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
+              arg_index, next_id>(format_str);
+        } else {
+          if constexpr (c == '}') {
+            return parse_tail<Args, arg_id_end_pos + 1, ID>(
+                runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
+                format_str);
+          } else if constexpr (c == ':') {
+            return unknown_format();  // no type info for specs parsing
+          }
+        }
+      }
+    }
+  } else if constexpr (str[POS] == '}') {
+    if constexpr (POS + 1 == str.size())
+      FMT_THROW(format_error("unmatched '}' in format string"));
+    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
+  } else {
+    constexpr auto end = parse_text(str, POS + 1);
+    if constexpr (end - POS > 1) {
+      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
+                                       format_str);
+    } else {
+      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
+                                       format_str);
+    }
+  }
+}
+
+template <typename... Args, typename S,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+constexpr auto compile(S format_str) {
+  constexpr auto str = basic_string_view<typename S::char_type>(format_str);
+  if constexpr (str.size() == 0) {
+    return detail::make_text(str, 0, 0);
+  } else {
+    constexpr auto result =
+        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
+            format_str);
+    return result;
+  }
+}
+#endif  // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+}  // namespace detail
+
+FMT_MODULE_EXPORT_BEGIN
+
+#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
+
+template <typename CompiledFormat, typename... Args,
+          typename Char = typename CompiledFormat::char_type,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
+                                          const Args&... args) {
+  auto s = std::basic_string<Char>();
+  cf.format(std::back_inserter(s), args...);
+  return s;
+}
+
+template <typename OutputIt, typename CompiledFormat, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
+constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+                                        const Args&... args) {
+  return cf.format(out, args...);
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
+                                                           Args&&... args) {
+  if constexpr (std::is_same<typename S::char_type, char>::value) {
+    constexpr auto str = basic_string_view<typename S::char_type>(S());
+    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
+      const auto& first = detail::first(args...);
+      if constexpr (detail::is_named_arg<
+                        remove_cvref_t<decltype(first)>>::value) {
+        return fmt::to_string(first.value);
+      } else {
+        return fmt::to_string(first);
+      }
+    }
+  }
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return fmt::format(
+        static_cast<basic_string_view<typename S::char_type>>(S()),
+        std::forward<Args>(args)...);
+  } else {
+    return fmt::format(compiled, std::forward<Args>(args)...);
+  }
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return fmt::format_to(
+        out, static_cast<basic_string_view<typename S::char_type>>(S()),
+        std::forward<Args>(args)...);
+  } else {
+    return fmt::format_to(out, compiled, std::forward<Args>(args)...);
+  }
+}
+#endif
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
+                                         const S& format_str, Args&&... args) {
+  auto it = fmt::format_to(detail::truncating_iterator<OutputIt>(out, n),
+                           format_str, std::forward<Args>(args)...);
+  return {it.base(), it.count()};
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR20 size_t formatted_size(const S& format_str,
+                                      const Args&... args) {
+  return fmt::format_to(detail::counting_iterator(), format_str, args...)
+      .count();
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(std::FILE* f, const S& format_str, const Args&... args) {
+  memory_buffer buffer;
+  fmt::format_to(std::back_inserter(buffer), format_str, args...);
+  detail::print(f, {buffer.data(), buffer.size()});
+}
+
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(const S& format_str, const Args&... args) {
+  print(stdout, format_str, args...);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_ARGS
+inline namespace literals {
+template <detail_exported::fixed_string Str> constexpr auto operator""_cf() {
+  using char_t = remove_cvref_t<decltype(Str.data[0])>;
+  return detail::udl_compiled_string<char_t, sizeof(Str.data) / sizeof(char_t),
+                                     Str>();
+}
+}  // namespace literals
+#endif
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_COMPILE_H_

libfuse/lib/fmt/os.h

@@ -0,0 +1,478 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OS_H_
+#define FMT_OS_H_
+
+#include <cerrno>
+#include <cstddef>
+#include <cstdio>
+#include <system_error>  // std::system_error
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+#  include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+#ifndef FMT_USE_FCNTL
+// UWP doesn't provide _pipe.
+#  if FMT_HAS_INCLUDE("winapifamily.h")
+#    include <winapifamily.h>
+#  endif
+#  if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
+       defined(__linux__)) &&                              \
+      (!defined(WINAPI_FAMILY) ||                          \
+       (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
+#    include <fcntl.h>  // for O_RDONLY
+#    define FMT_USE_FCNTL 1
+#  else
+#    define FMT_USE_FCNTL 0
+#  endif
+#endif
+
+#ifndef FMT_POSIX
+#  if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX(call) _##call
+#  else
+#    define FMT_POSIX(call) call
+#  endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+#  define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+#  define FMT_SYSTEM(call) ::call
+#  ifdef _WIN32
+// Fix warnings about deprecated symbols.
+#    define FMT_POSIX_CALL(call) ::_##call
+#  else
+#    define FMT_POSIX_CALL(call) ::call
+#  endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+#  define FMT_RETRY_VAL(result, expression, error_result) \
+    do {                                                  \
+      (result) = (expression);                            \
+    } while ((result) == (error_result) && errno == EINTR)
+#else
+#  define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  \rst
+  A reference to a null-terminated string. It can be constructed from a C
+  string or ``std::string``.
+
+  You can use one of the following type aliases for common character types:
+
+  +---------------+-----------------------------+
+  | Type          | Definition                  |
+  +===============+=============================+
+  | cstring_view  | basic_cstring_view<char>    |
+  +---------------+-----------------------------+
+  | wcstring_view | basic_cstring_view<wchar_t> |
+  +---------------+-----------------------------+
+
+  This class is most useful as a parameter type to allow passing
+  different types of strings to a function, for example::
+
+    template <typename... Args>
+    std::string format(cstring_view format_str, const Args & ... args);
+
+    format("{}", 42);
+    format(std::string("{}"), 42);
+  \endrst
+ */
+template <typename Char> class basic_cstring_view {
+ private:
+  const Char* data_;
+
+ public:
+  /** Constructs a string reference object from a C string. */
+  basic_cstring_view(const Char* s) : data_(s) {}
+
+  /**
+    \rst
+    Constructs a string reference from an ``std::string`` object.
+    \endrst
+   */
+  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
+
+  /** Returns the pointer to a C string. */
+  const Char* c_str() const { return data_; }
+};
+
+using cstring_view = basic_cstring_view<char>;
+using wcstring_view = basic_cstring_view<wchar_t>;
+
+template <typename Char> struct formatter<std::error_code, Char> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    out = detail::write_bytes(out, ec.category().name(),
+                              basic_format_specs<Char>());
+    out = detail::write<Char>(out, Char(':'));
+    out = detail::write<Char>(out, ec.value());
+    return out;
+  }
+};
+
+#ifdef _WIN32
+FMT_API const std::error_category& system_category() noexcept;
+
+FMT_BEGIN_DETAIL_NAMESPACE
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class utf16_to_utf8 {
+ private:
+  memory_buffer buffer_;
+
+ public:
+  utf16_to_utf8() {}
+  FMT_API explicit utf16_to_utf8(basic_string_view<wchar_t> s);
+  operator string_view() const { return string_view(&buffer_[0], size()); }
+  size_t size() const { return buffer_.size() - 1; }
+  const char* c_str() const { return &buffer_[0]; }
+  std::string str() const { return std::string(&buffer_[0], size()); }
+
+  // Performs conversion returning a system error code instead of
+  // throwing exception on conversion error. This method may still throw
+  // in case of memory allocation error.
+  FMT_API int convert(basic_string_view<wchar_t> s);
+};
+
+FMT_API void format_windows_error(buffer<char>& out, int error_code,
+                                  const char* message) noexcept;
+FMT_END_DETAIL_NAMESPACE
+
+FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
+                                         format_args args);
+
+/**
+ \rst
+ Constructs a :class:`std::system_error` object with the description
+ of the form
+
+ .. parsed-literal::
+   *<message>*: *<system-message>*
+
+ where *<message>* is the formatted message and *<system-message>* is the
+ system message corresponding to the error code.
+ *error_code* is a Windows error code as given by ``GetLastError``.
+ If *error_code* is not a valid error code such as -1, the system message
+ will look like "error -1".
+
+ **Example**::
+
+   // This throws a system_error with the description
+   //   cannot open file 'madeup': The system cannot find the file specified.
+   // or similar (system message may vary).
+   const char *filename = "madeup";
+   LPOFSTRUCT of = LPOFSTRUCT();
+   HFILE file = OpenFile(filename, &of, OF_READ);
+   if (file == HFILE_ERROR) {
+     throw fmt::windows_error(GetLastError(),
+                              "cannot open file '{}'", filename);
+   }
+ \endrst
+*/
+template <typename... Args>
+std::system_error windows_error(int error_code, string_view message,
+                                const Args&... args) {
+  return vwindows_error(error_code, message, fmt::make_format_args(args...));
+}
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code, const char* message) noexcept;
+#else
+inline const std::error_category& system_category() noexcept {
+  return std::system_category();
+}
+#endif  // _WIN32
+
+// std::system is not available on some platforms such as iOS (#2248).
+#ifdef __OSX__
+template <typename S, typename... Args, typename Char = char_t<S>>
+void say(const S& format_str, Args&&... args) {
+  std::system(format("say \"{}\"", format(format_str, args...)).c_str());
+}
+#endif
+
+// A buffered file.
+class buffered_file {
+ private:
+  FILE* file_;
+
+  friend class file;
+
+  explicit buffered_file(FILE* f) : file_(f) {}
+
+ public:
+  buffered_file(const buffered_file&) = delete;
+  void operator=(const buffered_file&) = delete;
+
+  // Constructs a buffered_file object which doesn't represent any file.
+  buffered_file() noexcept : file_(nullptr) {}
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~buffered_file() noexcept;
+
+ public:
+  buffered_file(buffered_file&& other) noexcept : file_(other.file_) {
+    other.file_ = nullptr;
+  }
+
+  buffered_file& operator=(buffered_file&& other) {
+    close();
+    file_ = other.file_;
+    other.file_ = nullptr;
+    return *this;
+  }
+
+  // Opens a file.
+  FMT_API buffered_file(cstring_view filename, cstring_view mode);
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the pointer to a FILE object representing this file.
+  FILE* get() const noexcept { return file_; }
+
+  FMT_API int descriptor() const;
+
+  void vprint(string_view format_str, format_args args) {
+    fmt::vprint(file_, format_str, args);
+  }
+
+  template <typename... Args>
+  inline void print(string_view format_str, const Args&... args) {
+    vprint(format_str, fmt::make_format_args(args...));
+  }
+};
+
+#if FMT_USE_FCNTL
+// A file. Closed file is represented by a file object with descriptor -1.
+// Methods that are not declared with noexcept may throw
+// fmt::system_error in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class FMT_API file {
+ private:
+  int fd_;  // File descriptor.
+
+  // Constructs a file object with a given descriptor.
+  explicit file(int fd) : fd_(fd) {}
+
+ public:
+  // Possible values for the oflag argument to the constructor.
+  enum {
+    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
+    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
+    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
+    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
+    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
+    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
+  };
+
+  // Constructs a file object which doesn't represent any file.
+  file() noexcept : fd_(-1) {}
+
+  // Opens a file and constructs a file object representing this file.
+  file(cstring_view path, int oflag);
+
+ public:
+  file(const file&) = delete;
+  void operator=(const file&) = delete;
+
+  file(file&& other) noexcept : fd_(other.fd_) { other.fd_ = -1; }
+
+  // Move assignment is not noexcept because close may throw.
+  file& operator=(file&& other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+
+  // Destroys the object closing the file it represents if any.
+  ~file() noexcept;
+
+  // Returns the file descriptor.
+  int descriptor() const noexcept { return fd_; }
+
+  // Closes the file.
+  void close();
+
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  long long size() const;
+
+  // Attempts to read count bytes from the file into the specified buffer.
+  size_t read(void* buffer, size_t count);
+
+  // Attempts to write count bytes from the specified buffer to the file.
+  size_t write(const void* buffer, size_t count);
+
+  // Duplicates a file descriptor with the dup function and returns
+  // the duplicate as a file object.
+  static file dup(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  void dup2(int fd, std::error_code& ec) noexcept;
+
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  static void pipe(file& read_end, file& write_end);
+
+  // Creates a buffered_file object associated with this file and detaches
+  // this file object from the file.
+  buffered_file fdopen(const char* mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+struct buffer_size {
+  buffer_size() = default;
+  size_t value = 0;
+  buffer_size operator=(size_t val) const {
+    auto bs = buffer_size();
+    bs.value = val;
+    return bs;
+  }
+};
+
+struct ostream_params {
+  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
+  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
+
+  ostream_params() {}
+
+  template <typename... T>
+  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
+    oflag = new_oflag;
+  }
+
+  template <typename... T>
+  ostream_params(T... params, detail::buffer_size bs)
+      : ostream_params(params...) {
+    this->buffer_size = bs.value;
+  }
+
+// Intel has a bug that results in failure to deduce a constructor
+// for empty parameter packs.
+#  if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
+  ostream_params(int new_oflag) : oflag(new_oflag) {}
+  ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
+#  endif
+};
+
+FMT_END_DETAIL_NAMESPACE
+
+// Added {} below to work around default constructor error known to
+// occur in Xcode versions 7.2.1 and 8.2.1.
+constexpr detail::buffer_size buffer_size{};
+
+/** A fast output stream which is not thread-safe. */
+class FMT_API ostream final : private detail::buffer<char> {
+ private:
+  file file_;
+
+  void grow(size_t) override;
+
+  ostream(cstring_view path, const detail::ostream_params& params)
+      : file_(path, params.oflag) {
+    set(new char[params.buffer_size], params.buffer_size);
+  }
+
+ public:
+  ostream(ostream&& other)
+      : detail::buffer<char>(other.data(), other.size(), other.capacity()),
+        file_(std::move(other.file_)) {
+    other.clear();
+    other.set(nullptr, 0);
+  }
+  ~ostream() {
+    flush();
+    delete[] data();
+  }
+
+  void flush() {
+    if (size() == 0) return;
+    file_.write(data(), size());
+    clear();
+  }
+
+  template <typename... T>
+  friend ostream output_file(cstring_view path, T... params);
+
+  void close() {
+    flush();
+    file_.close();
+  }
+
+  /**
+    Formats ``args`` according to specifications in ``fmt`` and writes the
+    output to the file.
+   */
+  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+    vformat_to(detail::buffer_appender<char>(*this), fmt,
+               fmt::make_format_args(args...));
+  }
+};
+
+/**
+  \rst
+  Opens a file for writing. Supported parameters passed in *params*:
+
+  * ``<integer>``: Flags passed to `open
+    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
+    (``file::WRONLY | file::CREATE | file::TRUNC`` by default)
+  * ``buffer_size=<integer>``: Output buffer size
+
+  **Example**::
+
+    auto out = fmt::output_file("guide.txt");
+    out.print("Don't {}", "Panic");
+  \endrst
+ */
+template <typename... T>
+inline ostream output_file(cstring_view path, T... params) {
+  return {path, detail::ostream_params(params...)};
+}
+#endif  // FMT_USE_FCNTL
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_OS_H_

libfuse/lib/fmt/ostream.h

@@ -0,0 +1,237 @@
+// Formatting library for C++ - std::ostream support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_OSTREAM_H_
+#define FMT_OSTREAM_H_
+
+#include <fstream>
+#include <ostream>
+#if defined(_WIN32) && defined(__GLIBCXX__)
+#  include <ext/stdio_filebuf.h>
+#  include <ext/stdio_sync_filebuf.h>
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+#  include <__std_stream>
+#endif
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+template <typename OutputIt, typename Char> class basic_printf_context;
+
+namespace detail {
+
+// Checks if T has a user-defined operator<<.
+template <typename T, typename Char, typename Enable = void>
+class is_streamable {
+ private:
+  template <typename U>
+  static auto test(int)
+      -> bool_constant<sizeof(std::declval<std::basic_ostream<Char>&>()
+                              << std::declval<U>()) != 0>;
+
+  template <typename> static auto test(...) -> std::false_type;
+
+  using result = decltype(test<T>(0));
+
+ public:
+  is_streamable() = default;
+
+  static const bool value = result::value;
+};
+
+// Formatting of built-in types and arrays is intentionally disabled because
+// it's handled by standard (non-ostream) formatters.
+template <typename T, typename Char>
+struct is_streamable<
+    T, Char,
+    enable_if_t<
+        std::is_arithmetic<T>::value || std::is_array<T>::value ||
+        std::is_pointer<T>::value || std::is_same<T, char8_type>::value ||
+        std::is_convertible<T, fmt::basic_string_view<Char>>::value ||
+        std::is_same<T, std_string_view<Char>>::value ||
+        (std::is_convertible<T, int>::value && !std::is_enum<T>::value)>>
+    : std::false_type {};
+
+// Generate a unique explicit instantion in every translation unit using a tag
+// type in an anonymous namespace.
+namespace {
+struct file_access_tag {};
+}  // namespace
+template <class Tag, class BufType, FILE* BufType::*FileMemberPtr>
+class file_access {
+  friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
+};
+
+#if FMT_MSC_VERSION
+template class file_access<file_access_tag, std::filebuf,
+                           &std::filebuf::_Myfile>;
+auto get_file(std::filebuf&) -> FILE*;
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+template class file_access<file_access_tag, std::__stdoutbuf<char>,
+                           &std::__stdoutbuf<char>::__file_>;
+auto get_file(std::__stdoutbuf<char>&) -> FILE*;
+#endif
+
+inline bool write_ostream_unicode(std::ostream& os, fmt::string_view data) {
+#if FMT_MSC_VERSION
+  if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
+    if (FILE* f = get_file(*buf)) return write_console(f, data);
+#elif defined(_WIN32) && defined(__GLIBCXX__)
+  auto* rdbuf = os.rdbuf();
+  FILE* c_file;
+  if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
+    c_file = fbuf->file();
+  else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
+    c_file = fbuf->file();
+  else
+    return false;
+  if (c_file) return write_console(c_file, data);
+#elif defined(_WIN32) && defined(_LIBCPP_VERSION)
+  if (auto* buf = dynamic_cast<std::__stdoutbuf<char>*>(os.rdbuf()))
+    if (FILE* f = get_file(*buf)) return write_console(f, data);
+#else
+  ignore_unused(os, data);
+#endif
+  return false;
+}
+inline bool write_ostream_unicode(std::wostream&,
+                                  fmt::basic_string_view<wchar_t>) {
+  return false;
+}
+
+// Write the content of buf to os.
+// It is a separate function rather than a part of vprint to simplify testing.
+template <typename Char>
+void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
+  const Char* buf_data = buf.data();
+  using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
+  unsigned_streamsize size = buf.size();
+  unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
+  do {
+    unsigned_streamsize n = size <= max_size ? size : max_size;
+    os.write(buf_data, static_cast<std::streamsize>(n));
+    buf_data += n;
+    size -= n;
+  } while (size != 0);
+}
+
+template <typename Char, typename T>
+void format_value(buffer<Char>& buf, const T& value,
+                  locale_ref loc = locale_ref()) {
+  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
+  auto&& output = std::basic_ostream<Char>(&format_buf);
+#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
+  if (loc) output.imbue(loc.get<std::locale>());
+#endif
+  output << value;
+  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+}
+
+template <typename T> struct streamed_view { const T& value; };
+
+}  // namespace detail
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename Char>
+struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
+  void set_debug_format() = delete;
+
+  template <typename T, typename OutputIt>
+  auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
+      -> OutputIt {
+    auto buffer = basic_memory_buffer<Char>();
+    format_value(buffer, value, ctx.locale());
+    return formatter<basic_string_view<Char>, Char>::format(
+        {buffer.data(), buffer.size()}, ctx);
+  }
+};
+
+using ostream_formatter = basic_ostream_formatter<char>;
+
+template <typename T, typename Char>
+struct formatter<detail::streamed_view<T>, Char>
+    : basic_ostream_formatter<Char> {
+  template <typename OutputIt>
+  auto format(detail::streamed_view<T> view,
+              basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
+    return basic_ostream_formatter<Char>::format(view.value, ctx);
+  }
+};
+
+/**
+  \rst
+  Returns a view that formats `value` via an ostream ``operator<<``.
+
+  **Example**::
+
+    fmt::print("Current thread id: {}\n",
+               fmt::streamed(std::this_thread::get_id()));
+  \endrst
+ */
+template <typename T>
+auto streamed(const T& value) -> detail::streamed_view<T> {
+  return {value};
+}
+
+namespace detail {
+
+// Formats an object of type T that has an overloaded ostream operator<<.
+template <typename T, typename Char>
+struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
+    : basic_ostream_formatter<Char> {
+  using basic_ostream_formatter<Char>::format;
+};
+
+inline void vprint_directly(std::ostream& os, string_view format_str,
+                            format_args args) {
+  auto buffer = memory_buffer();
+  detail::vformat_to(buffer, format_str, args);
+  detail::write_buffer(os, buffer);
+}
+
+}  // namespace detail
+
+FMT_MODULE_EXPORT template <typename Char>
+void vprint(std::basic_ostream<Char>& os,
+            basic_string_view<type_identity_t<Char>> format_str,
+            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
+  auto buffer = basic_memory_buffer<Char>();
+  detail::vformat_to(buffer, format_str, args);
+  if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
+  detail::write_buffer(os, buffer);
+}
+
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    fmt::print(cerr, "Don't {}!", "panic");
+  \endrst
+ */
+FMT_MODULE_EXPORT template <typename... T>
+void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
+  const auto& vargs = fmt::make_format_args(args...);
+  if (detail::is_utf8())
+    vprint(os, fmt, vargs);
+  else
+    detail::vprint_directly(os, fmt, vargs);
+}
+
+FMT_MODULE_EXPORT
+template <typename... Args>
+void print(std::wostream& os,
+           basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
+           Args&&... args) {
+  vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
+}
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_OSTREAM_H_

libfuse/lib/fmt/printf.h

@@ -0,0 +1,640 @@
+// Formatting library for C++ - legacy printf implementation
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_PRINTF_H_
+#define FMT_PRINTF_H_
+
+#include <algorithm>  // std::max
+#include <limits>     // std::numeric_limits
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
+
+template <typename T> struct printf_formatter { printf_formatter() = delete; };
+
+template <typename Char>
+class basic_printf_parse_context : public basic_format_parse_context<Char> {
+  using basic_format_parse_context<Char>::basic_format_parse_context;
+};
+
+template <typename OutputIt, typename Char> class basic_printf_context {
+ private:
+  OutputIt out_;
+  basic_format_args<basic_printf_context> args_;
+
+ public:
+  using char_type = Char;
+  using format_arg = basic_format_arg<basic_printf_context>;
+  using parse_context_type = basic_printf_parse_context<Char>;
+  template <typename T> using formatter_type = printf_formatter<T>;
+
+  /**
+    \rst
+    Constructs a ``printf_context`` object. References to the arguments are
+    stored in the context object so make sure they have appropriate lifetimes.
+    \endrst
+   */
+  basic_printf_context(OutputIt out,
+                       basic_format_args<basic_printf_context> args)
+      : out_(out), args_(args) {}
+
+  OutputIt out() { return out_; }
+  void advance_to(OutputIt it) { out_ = it; }
+
+  detail::locale_ref locale() { return {}; }
+
+  format_arg arg(int id) const { return args_.get(id); }
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    detail::error_handler().on_error(message);
+  }
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
+
+// Checks if a value fits in int - used to avoid warnings about comparing
+// signed and unsigned integers.
+template <bool IsSigned> struct int_checker {
+  template <typename T> static bool fits_in_int(T value) {
+    unsigned max = max_value<int>();
+    return value <= max;
+  }
+  static bool fits_in_int(bool) { return true; }
+};
+
+template <> struct int_checker<true> {
+  template <typename T> static bool fits_in_int(T value) {
+    return value >= (std::numeric_limits<int>::min)() &&
+           value <= max_value<int>();
+  }
+  static bool fits_in_int(int) { return true; }
+};
+
+class printf_precision_handler {
+ public:
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  int operator()(T value) {
+    if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
+      FMT_THROW(format_error("number is too big"));
+    return (std::max)(static_cast<int>(value), 0);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  int operator()(T) {
+    FMT_THROW(format_error("precision is not integer"));
+    return 0;
+  }
+};
+
+// An argument visitor that returns true iff arg is a zero integer.
+class is_zero_int {
+ public:
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  bool operator()(T value) {
+    return value == 0;
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  bool operator()(T) {
+    return false;
+  }
+};
+
+template <typename T> struct make_unsigned_or_bool : std::make_unsigned<T> {};
+
+template <> struct make_unsigned_or_bool<bool> { using type = bool; };
+
+template <typename T, typename Context> class arg_converter {
+ private:
+  using char_type = typename Context::char_type;
+
+  basic_format_arg<Context>& arg_;
+  char_type type_;
+
+ public:
+  arg_converter(basic_format_arg<Context>& arg, char_type type)
+      : arg_(arg), type_(type) {}
+
+  void operator()(bool value) {
+    if (type_ != 's') operator()<bool>(value);
+  }
+
+  template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
+  void operator()(U value) {
+    bool is_signed = type_ == 'd' || type_ == 'i';
+    using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
+    if (const_check(sizeof(target_type) <= sizeof(int))) {
+      // Extra casts are used to silence warnings.
+      if (is_signed) {
+        arg_ = detail::make_arg<Context>(
+            static_cast<int>(static_cast<target_type>(value)));
+      } else {
+        using unsigned_type = typename make_unsigned_or_bool<target_type>::type;
+        arg_ = detail::make_arg<Context>(
+            static_cast<unsigned>(static_cast<unsigned_type>(value)));
+      }
+    } else {
+      if (is_signed) {
+        // glibc's printf doesn't sign extend arguments of smaller types:
+        //   std::printf("%lld", -42);  // prints "4294967254"
+        // but we don't have to do the same because it's a UB.
+        arg_ = detail::make_arg<Context>(static_cast<long long>(value));
+      } else {
+        arg_ = detail::make_arg<Context>(
+            static_cast<typename make_unsigned_or_bool<U>::type>(value));
+      }
+    }
+  }
+
+  template <typename U, FMT_ENABLE_IF(!std::is_integral<U>::value)>
+  void operator()(U) {}  // No conversion needed for non-integral types.
+};
+
+// Converts an integer argument to T for printf, if T is an integral type.
+// If T is void, the argument is converted to corresponding signed or unsigned
+// type depending on the type specifier: 'd' and 'i' - signed, other -
+// unsigned).
+template <typename T, typename Context, typename Char>
+void convert_arg(basic_format_arg<Context>& arg, Char type) {
+  visit_format_arg(arg_converter<T, Context>(arg, type), arg);
+}
+
+// Converts an integer argument to char for printf.
+template <typename Context> class char_converter {
+ private:
+  basic_format_arg<Context>& arg_;
+
+ public:
+  explicit char_converter(basic_format_arg<Context>& arg) : arg_(arg) {}
+
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  void operator()(T value) {
+    arg_ = detail::make_arg<Context>(
+        static_cast<typename Context::char_type>(value));
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  void operator()(T) {}  // No conversion needed for non-integral types.
+};
+
+// An argument visitor that return a pointer to a C string if argument is a
+// string or null otherwise.
+template <typename Char> struct get_cstring {
+  template <typename T> const Char* operator()(T) { return nullptr; }
+  const Char* operator()(const Char* s) { return s; }
+};
+
+// Checks if an argument is a valid printf width specifier and sets
+// left alignment if it is negative.
+template <typename Char> class printf_width_handler {
+ private:
+  using format_specs = basic_format_specs<Char>;
+
+  format_specs& specs_;
+
+ public:
+  explicit printf_width_handler(format_specs& specs) : specs_(specs) {}
+
+  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+  unsigned operator()(T value) {
+    auto width = static_cast<uint32_or_64_or_128_t<T>>(value);
+    if (detail::is_negative(value)) {
+      specs_.align = align::left;
+      width = 0 - width;
+    }
+    unsigned int_max = max_value<int>();
+    if (width > int_max) FMT_THROW(format_error("number is too big"));
+    return static_cast<unsigned>(width);
+  }
+
+  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+  unsigned operator()(T) {
+    FMT_THROW(format_error("width is not integer"));
+    return 0;
+  }
+};
+
+// The ``printf`` argument formatter.
+template <typename OutputIt, typename Char>
+class printf_arg_formatter : public arg_formatter<Char> {
+ private:
+  using base = arg_formatter<Char>;
+  using context_type = basic_printf_context<OutputIt, Char>;
+  using format_specs = basic_format_specs<Char>;
+
+  context_type& context_;
+
+  OutputIt write_null_pointer(bool is_string = false) {
+    auto s = this->specs;
+    s.type = presentation_type::none;
+    return write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
+  }
+
+ public:
+  printf_arg_formatter(OutputIt iter, format_specs& s, context_type& ctx)
+      : base{iter, s, locale_ref()}, context_(ctx) {}
+
+  OutputIt operator()(monostate value) { return base::operator()(value); }
+
+  template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
+  OutputIt operator()(T value) {
+    // MSVC2013 fails to compile separate overloads for bool and Char so use
+    // std::is_same instead.
+    if (std::is_same<T, Char>::value) {
+      format_specs fmt_specs = this->specs;
+      if (fmt_specs.type != presentation_type::none &&
+          fmt_specs.type != presentation_type::chr) {
+        return (*this)(static_cast<int>(value));
+      }
+      fmt_specs.sign = sign::none;
+      fmt_specs.alt = false;
+      fmt_specs.fill[0] = ' ';  // Ignore '0' flag for char types.
+      // align::numeric needs to be overwritten here since the '0' flag is
+      // ignored for non-numeric types
+      if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
+        fmt_specs.align = align::right;
+      return write<Char>(this->out, static_cast<Char>(value), fmt_specs);
+    }
+    return base::operator()(value);
+  }
+
+  template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+  OutputIt operator()(T value) {
+    return base::operator()(value);
+  }
+
+  /** Formats a null-terminated C string. */
+  OutputIt operator()(const char* value) {
+    if (value) return base::operator()(value);
+    return write_null_pointer(this->specs.type != presentation_type::pointer);
+  }
+
+  /** Formats a null-terminated wide C string. */
+  OutputIt operator()(const wchar_t* value) {
+    if (value) return base::operator()(value);
+    return write_null_pointer(this->specs.type != presentation_type::pointer);
+  }
+
+  OutputIt operator()(basic_string_view<Char> value) {
+    return base::operator()(value);
+  }
+
+  /** Formats a pointer. */
+  OutputIt operator()(const void* value) {
+    return value ? base::operator()(value) : write_null_pointer();
+  }
+
+  /** Formats an argument of a custom (user-defined) type. */
+  OutputIt operator()(typename basic_format_arg<context_type>::handle handle) {
+    auto parse_ctx =
+        basic_printf_parse_context<Char>(basic_string_view<Char>());
+    handle.format(parse_ctx, context_);
+    return this->out;
+  }
+};
+
+template <typename Char>
+void parse_flags(basic_format_specs<Char>& specs, const Char*& it,
+                 const Char* end) {
+  for (; it != end; ++it) {
+    switch (*it) {
+    case '-':
+      specs.align = align::left;
+      break;
+    case '+':
+      specs.sign = sign::plus;
+      break;
+    case '0':
+      specs.fill[0] = '0';
+      break;
+    case ' ':
+      if (specs.sign != sign::plus) {
+        specs.sign = sign::space;
+      }
+      break;
+    case '#':
+      specs.alt = true;
+      break;
+    default:
+      return;
+    }
+  }
+}
+
+template <typename Char, typename GetArg>
+int parse_header(const Char*& it, const Char* end,
+                 basic_format_specs<Char>& specs, GetArg get_arg) {
+  int arg_index = -1;
+  Char c = *it;
+  if (c >= '0' && c <= '9') {
+    // Parse an argument index (if followed by '$') or a width possibly
+    // preceded with '0' flag(s).
+    int value = parse_nonnegative_int(it, end, -1);
+    if (it != end && *it == '$') {  // value is an argument index
+      ++it;
+      arg_index = value != -1 ? value : max_value<int>();
+    } else {
+      if (c == '0') specs.fill[0] = '0';
+      if (value != 0) {
+        // Nonzero value means that we parsed width and don't need to
+        // parse it or flags again, so return now.
+        if (value == -1) FMT_THROW(format_error("number is too big"));
+        specs.width = value;
+        return arg_index;
+      }
+    }
+  }
+  parse_flags(specs, it, end);
+  // Parse width.
+  if (it != end) {
+    if (*it >= '0' && *it <= '9') {
+      specs.width = parse_nonnegative_int(it, end, -1);
+      if (specs.width == -1) FMT_THROW(format_error("number is too big"));
+    } else if (*it == '*') {
+      ++it;
+      specs.width = static_cast<int>(visit_format_arg(
+          detail::printf_width_handler<Char>(specs), get_arg(-1)));
+    }
+  }
+  return arg_index;
+}
+
+template <typename Char, typename Context>
+void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
+             basic_format_args<Context> args) {
+  using OutputIt = buffer_appender<Char>;
+  auto out = OutputIt(buf);
+  auto context = basic_printf_context<OutputIt, Char>(out, args);
+  auto parse_ctx = basic_printf_parse_context<Char>(format);
+
+  // Returns the argument with specified index or, if arg_index is -1, the next
+  // argument.
+  auto get_arg = [&](int arg_index) {
+    if (arg_index < 0)
+      arg_index = parse_ctx.next_arg_id();
+    else
+      parse_ctx.check_arg_id(--arg_index);
+    return detail::get_arg(context, arg_index);
+  };
+
+  const Char* start = parse_ctx.begin();
+  const Char* end = parse_ctx.end();
+  auto it = start;
+  while (it != end) {
+    if (!detail::find<false, Char>(it, end, '%', it)) {
+      it = end;  // detail::find leaves it == nullptr if it doesn't find '%'
+      break;
+    }
+    Char c = *it++;
+    if (it != end && *it == c) {
+      out = detail::write(
+          out, basic_string_view<Char>(start, detail::to_unsigned(it - start)));
+      start = ++it;
+      continue;
+    }
+    out = detail::write(out, basic_string_view<Char>(
+                                 start, detail::to_unsigned(it - 1 - start)));
+
+    basic_format_specs<Char> specs;
+    specs.align = align::right;
+
+    // Parse argument index, flags and width.
+    int arg_index = parse_header(it, end, specs, get_arg);
+    if (arg_index == 0) parse_ctx.on_error("argument not found");
+
+    // Parse precision.
+    if (it != end && *it == '.') {
+      ++it;
+      c = it != end ? *it : 0;
+      if ('0' <= c && c <= '9') {
+        specs.precision = parse_nonnegative_int(it, end, 0);
+      } else if (c == '*') {
+        ++it;
+        specs.precision = static_cast<int>(
+            visit_format_arg(detail::printf_precision_handler(), get_arg(-1)));
+      } else {
+        specs.precision = 0;
+      }
+    }
+
+    auto arg = get_arg(arg_index);
+    // For d, i, o, u, x, and X conversion specifiers, if a precision is
+    // specified, the '0' flag is ignored
+    if (specs.precision >= 0 && arg.is_integral())
+      specs.fill[0] =
+          ' ';  // Ignore '0' flag for non-numeric types or if '-' present.
+    if (specs.precision >= 0 && arg.type() == detail::type::cstring_type) {
+      auto str = visit_format_arg(detail::get_cstring<Char>(), arg);
+      auto str_end = str + specs.precision;
+      auto nul = std::find(str, str_end, Char());
+      arg = detail::make_arg<basic_printf_context<OutputIt, Char>>(
+          basic_string_view<Char>(
+              str, detail::to_unsigned(nul != str_end ? nul - str
+                                                      : specs.precision)));
+    }
+    if (specs.alt && visit_format_arg(detail::is_zero_int(), arg))
+      specs.alt = false;
+    if (specs.fill[0] == '0') {
+      if (arg.is_arithmetic() && specs.align != align::left)
+        specs.align = align::numeric;
+      else
+        specs.fill[0] = ' ';  // Ignore '0' flag for non-numeric types or if '-'
+                              // flag is also present.
+    }
+
+    // Parse length and convert the argument to the required type.
+    c = it != end ? *it++ : 0;
+    Char t = it != end ? *it : 0;
+    using detail::convert_arg;
+    switch (c) {
+    case 'h':
+      if (t == 'h') {
+        ++it;
+        t = it != end ? *it : 0;
+        convert_arg<signed char>(arg, t);
+      } else {
+        convert_arg<short>(arg, t);
+      }
+      break;
+    case 'l':
+      if (t == 'l') {
+        ++it;
+        t = it != end ? *it : 0;
+        convert_arg<long long>(arg, t);
+      } else {
+        convert_arg<long>(arg, t);
+      }
+      break;
+    case 'j':
+      convert_arg<intmax_t>(arg, t);
+      break;
+    case 'z':
+      convert_arg<size_t>(arg, t);
+      break;
+    case 't':
+      convert_arg<std::ptrdiff_t>(arg, t);
+      break;
+    case 'L':
+      // printf produces garbage when 'L' is omitted for long double, no
+      // need to do the same.
+      break;
+    default:
+      --it;
+      convert_arg<void>(arg, c);
+    }
+
+    // Parse type.
+    if (it == end) FMT_THROW(format_error("invalid format string"));
+    char type = static_cast<char>(*it++);
+    if (arg.is_integral()) {
+      // Normalize type.
+      switch (type) {
+      case 'i':
+      case 'u':
+        type = 'd';
+        break;
+      case 'c':
+        visit_format_arg(
+            detail::char_converter<basic_printf_context<OutputIt, Char>>(arg),
+            arg);
+        break;
+      }
+    }
+    specs.type = parse_presentation_type(type);
+    if (specs.type == presentation_type::none)
+      parse_ctx.on_error("invalid type specifier");
+
+    start = it;
+
+    // Format argument.
+    out = visit_format_arg(
+        detail::printf_arg_formatter<OutputIt, Char>(out, specs, context), arg);
+  }
+  detail::write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
+}
+FMT_END_DETAIL_NAMESPACE
+
+template <typename Char>
+using basic_printf_context_t =
+    basic_printf_context<detail::buffer_appender<Char>, Char>;
+
+using printf_context = basic_printf_context_t<char>;
+using wprintf_context = basic_printf_context_t<wchar_t>;
+
+using printf_args = basic_format_args<printf_context>;
+using wprintf_args = basic_format_args<wprintf_context>;
+
+/**
+  \rst
+  Constructs an `~fmt::format_arg_store` object that contains references to
+  arguments and can be implicitly converted to `~fmt::printf_args`.
+  \endrst
+ */
+template <typename... T>
+inline auto make_printf_args(const T&... args)
+    -> format_arg_store<printf_context, T...> {
+  return {args...};
+}
+
+/**
+  \rst
+  Constructs an `~fmt::format_arg_store` object that contains references to
+  arguments and can be implicitly converted to `~fmt::wprintf_args`.
+  \endrst
+ */
+template <typename... T>
+inline auto make_wprintf_args(const T&... args)
+    -> format_arg_store<wprintf_context, T...> {
+  return {args...};
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vsprintf(
+    const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  vprintf(buffer, detail::to_string_view(fmt), args);
+  return to_string(buffer);
+}
+
+/**
+  \rst
+  Formats arguments and returns the result as a string.
+
+  **Example**::
+
+    std::string message = fmt::sprintf("The answer is %d", 42);
+  \endrst
+*/
+template <typename S, typename... T,
+          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
+  using context = basic_printf_context_t<Char>;
+  return vsprintf(detail::to_string_view(fmt),
+                  fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vfprintf(
+    std::FILE* f, const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
+  basic_memory_buffer<Char> buffer;
+  vprintf(buffer, detail::to_string_view(fmt), args);
+  size_t size = buffer.size();
+  return std::fwrite(buffer.data(), sizeof(Char), size, f) < size
+             ? -1
+             : static_cast<int>(size);
+}
+
+/**
+  \rst
+  Prints formatted data to the file *f*.
+
+  **Example**::
+
+    fmt::fprintf(stderr, "Don't %s!", "panic");
+  \endrst
+ */
+template <typename S, typename... T, typename Char = char_t<S>>
+inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
+  using context = basic_printf_context_t<Char>;
+  return vfprintf(f, detail::to_string_view(fmt),
+                  fmt::make_format_args<context>(args...));
+}
+
+template <typename S, typename Char = char_t<S>>
+inline auto vprintf(
+    const S& fmt,
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
+  return vfprintf(stdout, detail::to_string_view(fmt), args);
+}
+
+/**
+  \rst
+  Prints formatted data to ``stdout``.
+
+  **Example**::
+
+    fmt::printf("Elapsed time: %.2f seconds", 1.23);
+  \endrst
+ */
+template <typename S, typename... T, FMT_ENABLE_IF(detail::is_string<S>::value)>
+inline auto printf(const S& fmt, const T&... args) -> int {
+  return vprintf(
+      detail::to_string_view(fmt),
+      fmt::make_format_args<basic_printf_context_t<char_t<S>>>(args...));
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_PRINTF_H_

libfuse/lib/fmt/ranges.h

@@ -0,0 +1,722 @@
+// Formatting library for C++ - experimental range support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+//
+// Copyright (c) 2018 - present, Remotion (Igor Schulz)
+// All Rights Reserved
+// {fmt} support for ranges, containers and types tuple interface.
+
+#ifndef FMT_RANGES_H_
+#define FMT_RANGES_H_
+
+#include <initializer_list>
+#include <tuple>
+#include <type_traits>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename RangeT, typename OutputIterator>
+OutputIterator copy(const RangeT& range, OutputIterator out) {
+  for (auto it = range.begin(), end = range.end(); it != end; ++it)
+    *out++ = *it;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(const char* str, OutputIterator out) {
+  while (*str) *out++ = *str++;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(char ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
+template <typename OutputIterator>
+OutputIterator copy(wchar_t ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
+// Returns true if T has a std::string-like interface, like std::string_view.
+template <typename T> class is_std_string_like {
+  template <typename U>
+  static auto check(U* p)
+      -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
+  template <typename> static void check(...);
+
+ public:
+  static constexpr const bool value =
+      is_string<T>::value ||
+      std::is_convertible<T, std_string_view<char>>::value ||
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+template <typename Char>
+struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
+
+template <typename T> class is_map {
+  template <typename U> static auto check(U*) -> typename U::mapped_type;
+  template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_MAP_AS_LIST
+  static constexpr const bool value = false;
+#else
+  static constexpr const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+#endif
+};
+
+template <typename T> class is_set {
+  template <typename U> static auto check(U*) -> typename U::key_type;
+  template <typename> static void check(...);
+
+ public:
+#ifdef FMT_FORMAT_SET_AS_LIST
+  static constexpr const bool value = false;
+#else
+  static constexpr const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value && !is_map<T>::value;
+#endif
+};
+
+template <typename... Ts> struct conditional_helper {};
+
+template <typename T, typename _ = void> struct is_range_ : std::false_type {};
+
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION > 1800
+
+#  define FMT_DECLTYPE_RETURN(val)  \
+    ->decltype(val) { return val; } \
+    static_assert(                  \
+        true, "")  // This makes it so that a semicolon is required after the
+                   // macro, which helps clang-format handle the formatting.
+
+// C array overload
+template <typename T, std::size_t N>
+auto range_begin(const T (&arr)[N]) -> const T* {
+  return arr;
+}
+template <typename T, std::size_t N>
+auto range_end(const T (&arr)[N]) -> const T* {
+  return arr + N;
+}
+
+template <typename T, typename Enable = void>
+struct has_member_fn_begin_end_t : std::false_type {};
+
+template <typename T>
+struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
+                                           decltype(std::declval<T>().end())>>
+    : std::true_type {};
+
+// Member function overload
+template <typename T>
+auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
+template <typename T>
+auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
+
+// ADL overload. Only participates in overload resolution if member functions
+// are not found.
+template <typename T>
+auto range_begin(T&& rng)
+    -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                   decltype(begin(static_cast<T&&>(rng)))> {
+  return begin(static_cast<T&&>(rng));
+}
+template <typename T>
+auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                                       decltype(end(static_cast<T&&>(rng)))> {
+  return end(static_cast<T&&>(rng));
+}
+
+template <typename T, typename Enable = void>
+struct has_const_begin_end : std::false_type {};
+template <typename T, typename Enable = void>
+struct has_mutable_begin_end : std::false_type {};
+
+template <typename T>
+struct has_const_begin_end<
+    T,
+    void_t<
+        decltype(detail::range_begin(std::declval<const remove_cvref_t<T>&>())),
+        decltype(detail::range_end(std::declval<const remove_cvref_t<T>&>()))>>
+    : std::true_type {};
+
+template <typename T>
+struct has_mutable_begin_end<
+    T, void_t<decltype(detail::range_begin(std::declval<T>())),
+              decltype(detail::range_end(std::declval<T>())),
+              enable_if_t<std::is_copy_constructible<T>::value>>>
+    : std::true_type {};
+
+template <typename T>
+struct is_range_<T, void>
+    : std::integral_constant<bool, (has_const_begin_end<T>::value ||
+                                    has_mutable_begin_end<T>::value)> {};
+#  undef FMT_DECLTYPE_RETURN
+#endif
+
+// tuple_size and tuple_element check.
+template <typename T> class is_tuple_like_ {
+  template <typename U>
+  static auto check(U* p) -> decltype(std::tuple_size<U>::value, int());
+  template <typename> static void check(...);
+
+ public:
+  static constexpr const bool value =
+      !std::is_void<decltype(check<T>(nullptr))>::value;
+};
+
+// Check for integer_sequence
+#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VERSION >= 1900
+template <typename T, T... N>
+using integer_sequence = std::integer_sequence<T, N...>;
+template <size_t... N> using index_sequence = std::index_sequence<N...>;
+template <size_t N> using make_index_sequence = std::make_index_sequence<N>;
+#else
+template <typename T, T... N> struct integer_sequence {
+  using value_type = T;
+
+  static FMT_CONSTEXPR size_t size() { return sizeof...(N); }
+};
+
+template <size_t... N> using index_sequence = integer_sequence<size_t, N...>;
+
+template <typename T, size_t N, T... Ns>
+struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
+template <typename T, T... Ns>
+struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
+
+template <size_t N>
+using make_index_sequence = make_integer_sequence<size_t, N>;
+#endif
+
+template <typename T>
+using tuple_index_sequence = make_index_sequence<std::tuple_size<T>::value>;
+
+template <typename T, typename C, bool = is_tuple_like_<T>::value>
+class is_tuple_formattable_ {
+ public:
+  static constexpr const bool value = false;
+};
+template <typename T, typename C> class is_tuple_formattable_<T, C, true> {
+  template <std::size_t... I>
+  static std::true_type check2(index_sequence<I...>,
+                               integer_sequence<bool, (I == I)...>);
+  static std::false_type check2(...);
+  template <std::size_t... I>
+  static decltype(check2(
+      index_sequence<I...>{},
+      integer_sequence<
+          bool, (is_formattable<typename std::tuple_element<I, T>::type,
+                                C>::value)...>{})) check(index_sequence<I...>);
+
+ public:
+  static constexpr const bool value =
+      decltype(check(tuple_index_sequence<T>{}))::value;
+};
+
+template <class Tuple, class F, size_t... Is>
+void for_each(index_sequence<Is...>, Tuple&& tup, F&& f) noexcept {
+  using std::get;
+  // using free function get<I>(T) now.
+  const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
+  (void)_;  // blocks warnings
+}
+
+template <class T>
+FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> get_indexes(
+    T const&) {
+  return {};
+}
+
+template <class Tuple, class F> void for_each(Tuple&& tup, F&& f) {
+  const auto indexes = get_indexes(tup);
+  for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
+}
+
+#if FMT_MSC_VERSION && FMT_MSC_VERSION < 1920
+// Older MSVC doesn't get the reference type correctly for arrays.
+template <typename R> struct range_reference_type_impl {
+  using type = decltype(*detail::range_begin(std::declval<R&>()));
+};
+
+template <typename T, std::size_t N> struct range_reference_type_impl<T[N]> {
+  using type = T&;
+};
+
+template <typename T>
+using range_reference_type = typename range_reference_type_impl<T>::type;
+#else
+template <typename Range>
+using range_reference_type =
+    decltype(*detail::range_begin(std::declval<Range&>()));
+#endif
+
+// We don't use the Range's value_type for anything, but we do need the Range's
+// reference type, with cv-ref stripped.
+template <typename Range>
+using uncvref_type = remove_cvref_t<range_reference_type<Range>>;
+
+template <typename Range>
+using uncvref_first_type =
+    remove_cvref_t<decltype(std::declval<range_reference_type<Range>>().first)>;
+
+template <typename Range>
+using uncvref_second_type = remove_cvref_t<
+    decltype(std::declval<range_reference_type<Range>>().second)>;
+
+template <typename OutputIt> OutputIt write_delimiter(OutputIt out) {
+  *out++ = ',';
+  *out++ = ' ';
+  return out;
+}
+
+template <typename Char, typename OutputIt>
+auto write_range_entry(OutputIt out, basic_string_view<Char> str) -> OutputIt {
+  return write_escaped_string(out, str);
+}
+
+template <typename Char, typename OutputIt, typename T,
+          FMT_ENABLE_IF(std::is_convertible<T, std_string_view<char>>::value)>
+inline auto write_range_entry(OutputIt out, const T& str) -> OutputIt {
+  auto sv = std_string_view<Char>(str);
+  return write_range_entry<Char>(out, basic_string_view<Char>(sv));
+}
+
+template <typename Char, typename OutputIt, typename Arg,
+          FMT_ENABLE_IF(std::is_same<Arg, Char>::value)>
+OutputIt write_range_entry(OutputIt out, const Arg v) {
+  return write_escaped_char(out, v);
+}
+
+template <
+    typename Char, typename OutputIt, typename Arg,
+    FMT_ENABLE_IF(!is_std_string_like<typename std::decay<Arg>::type>::value &&
+                  !std::is_same<Arg, Char>::value)>
+OutputIt write_range_entry(OutputIt out, const Arg& v) {
+  return write<Char>(out, v);
+}
+
+}  // namespace detail
+
+template <typename T> struct is_tuple_like {
+  static constexpr const bool value =
+      detail::is_tuple_like_<T>::value && !detail::is_range_<T>::value;
+};
+
+template <typename T, typename C> struct is_tuple_formattable {
+  static constexpr const bool value =
+      detail::is_tuple_formattable_<T, C>::value;
+};
+
+template <typename TupleT, typename Char>
+struct formatter<TupleT, Char,
+                 enable_if_t<fmt::is_tuple_like<TupleT>::value &&
+                             fmt::is_tuple_formattable<TupleT, Char>::value>> {
+ private:
+  basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
+  basic_string_view<Char> opening_bracket_ =
+      detail::string_literal<Char, '('>{};
+  basic_string_view<Char> closing_bracket_ =
+      detail::string_literal<Char, ')'>{};
+
+  // C++11 generic lambda for format().
+  template <typename FormatContext> struct format_each {
+    template <typename T> void operator()(const T& v) {
+      if (i > 0) out = detail::copy_str<Char>(separator, out);
+      out = detail::write_range_entry<Char>(out, v);
+      ++i;
+    }
+    int i;
+    typename FormatContext::iterator& out;
+    basic_string_view<Char> separator;
+  };
+
+ public:
+  FMT_CONSTEXPR formatter() {}
+
+  FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
+    separator_ = sep;
+  }
+
+  FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
+                                  basic_string_view<Char> close) {
+    opening_bracket_ = open;
+    closing_bracket_ = close;
+  }
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext = format_context>
+  auto format(const TupleT& values, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    out = detail::copy_str<Char>(opening_bracket_, out);
+    detail::for_each(values, format_each<FormatContext>{0, out, separator_});
+    out = detail::copy_str<Char>(closing_bracket_, out);
+    return out;
+  }
+};
+
+template <typename T, typename Char> struct is_range {
+  static constexpr const bool value =
+      detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
+      !std::is_convertible<T, std::basic_string<Char>>::value &&
+      !std::is_convertible<T, detail::std_string_view<Char>>::value;
+};
+
+namespace detail {
+template <typename Context> struct range_mapper {
+  using mapper = arg_mapper<Context>;
+
+  template <typename T,
+            FMT_ENABLE_IF(has_formatter<remove_cvref_t<T>, Context>::value)>
+  static auto map(T&& value) -> T&& {
+    return static_cast<T&&>(value);
+  }
+  template <typename T,
+            FMT_ENABLE_IF(!has_formatter<remove_cvref_t<T>, Context>::value)>
+  static auto map(T&& value)
+      -> decltype(mapper().map(static_cast<T&&>(value))) {
+    return mapper().map(static_cast<T&&>(value));
+  }
+};
+
+template <typename Char, typename Element>
+using range_formatter_type = conditional_t<
+    is_formattable<Element, Char>::value,
+    formatter<remove_cvref_t<decltype(range_mapper<buffer_context<Char>>{}.map(
+                  std::declval<Element>()))>,
+              Char>,
+    fallback_formatter<Element, Char>>;
+
+template <typename R>
+using maybe_const_range =
+    conditional_t<has_const_begin_end<R>::value, const R, R>;
+
+// Workaround a bug in MSVC 2015 and earlier.
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
+template <typename R, typename Char>
+struct is_formattable_delayed
+    : disjunction<
+          is_formattable<uncvref_type<maybe_const_range<R>>, Char>,
+          has_fallback_formatter<uncvref_type<maybe_const_range<R>>, Char>> {};
+#endif
+
+}  // namespace detail
+
+template <typename T, typename Char, typename Enable = void>
+struct range_formatter;
+
+template <typename T, typename Char>
+struct range_formatter<
+    T, Char,
+    enable_if_t<conjunction<
+        std::is_same<T, remove_cvref_t<T>>,
+        disjunction<is_formattable<T, Char>,
+                    detail::has_fallback_formatter<T, Char>>>::value>> {
+ private:
+  detail::range_formatter_type<Char, T> underlying_;
+  bool custom_specs_ = false;
+  basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
+  basic_string_view<Char> opening_bracket_ =
+      detail::string_literal<Char, '['>{};
+  basic_string_view<Char> closing_bracket_ =
+      detail::string_literal<Char, ']'>{};
+
+  template <class U>
+  FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, int)
+      -> decltype(u.set_debug_format()) {
+    u.set_debug_format();
+  }
+
+  template <class U>
+  FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
+
+  FMT_CONSTEXPR void maybe_set_debug_format() {
+    maybe_set_debug_format(underlying_, 0);
+  }
+
+ public:
+  FMT_CONSTEXPR range_formatter() {}
+
+  FMT_CONSTEXPR auto underlying() -> detail::range_formatter_type<Char, T>& {
+    return underlying_;
+  }
+
+  FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
+    separator_ = sep;
+  }
+
+  FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
+                                  basic_string_view<Char> close) {
+    opening_bracket_ = open;
+    closing_bracket_ = close;
+  }
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    auto it = ctx.begin();
+    auto end = ctx.end();
+    if (it == end || *it == '}') {
+      maybe_set_debug_format();
+      return it;
+    }
+
+    if (*it == 'n') {
+      set_brackets({}, {});
+      ++it;
+    }
+
+    if (*it == '}') {
+      maybe_set_debug_format();
+      return it;
+    }
+
+    if (*it != ':')
+      FMT_THROW(format_error("no other top-level range formatters supported"));
+
+    custom_specs_ = true;
+    ++it;
+    ctx.advance_to(it);
+    return underlying_.parse(ctx);
+  }
+
+  template <typename R, class FormatContext>
+  auto format(R&& range, FormatContext& ctx) const -> decltype(ctx.out()) {
+    detail::range_mapper<buffer_context<Char>> mapper;
+    auto out = ctx.out();
+    out = detail::copy_str<Char>(opening_bracket_, out);
+    int i = 0;
+    auto it = detail::range_begin(range);
+    auto end = detail::range_end(range);
+    for (; it != end; ++it) {
+      if (i > 0) out = detail::copy_str<Char>(separator_, out);
+      ;
+      ctx.advance_to(out);
+      out = underlying_.format(mapper.map(*it), ctx);
+      ++i;
+    }
+    out = detail::copy_str<Char>(closing_bracket_, out);
+    return out;
+  }
+};
+
+enum class range_format { disabled, map, set, sequence, string, debug_string };
+
+namespace detail {
+template <typename T> struct range_format_kind_ {
+  static constexpr auto value = std::is_same<range_reference_type<T>, T>::value
+                                    ? range_format::disabled
+                                : is_map<T>::value ? range_format::map
+                                : is_set<T>::value ? range_format::set
+                                                   : range_format::sequence;
+};
+
+template <range_format K, typename R, typename Char, typename Enable = void>
+struct range_default_formatter;
+
+template <range_format K>
+using range_format_constant = std::integral_constant<range_format, K>;
+
+template <range_format K, typename R, typename Char>
+struct range_default_formatter<
+    K, R, Char,
+    enable_if_t<(K == range_format::sequence || K == range_format::map ||
+                 K == range_format::set)>> {
+  using range_type = detail::maybe_const_range<R>;
+  range_formatter<detail::uncvref_type<range_type>, Char> underlying_;
+
+  FMT_CONSTEXPR range_default_formatter() { init(range_format_constant<K>()); }
+
+  FMT_CONSTEXPR void init(range_format_constant<range_format::set>) {
+    underlying_.set_brackets(detail::string_literal<Char, '{'>{},
+                             detail::string_literal<Char, '}'>{});
+  }
+
+  FMT_CONSTEXPR void init(range_format_constant<range_format::map>) {
+    underlying_.set_brackets(detail::string_literal<Char, '{'>{},
+                             detail::string_literal<Char, '}'>{});
+    underlying_.underlying().set_brackets({}, {});
+    underlying_.underlying().set_separator(
+        detail::string_literal<Char, ':', ' '>{});
+  }
+
+  FMT_CONSTEXPR void init(range_format_constant<range_format::sequence>) {}
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return underlying_.parse(ctx);
+  }
+
+  template <typename FormatContext>
+  auto format(range_type& range, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    return underlying_.format(range, ctx);
+  }
+};
+}  // namespace detail
+
+template <typename T, typename Char, typename Enable = void>
+struct range_format_kind
+    : conditional_t<
+          is_range<T, Char>::value, detail::range_format_kind_<T>,
+          std::integral_constant<range_format, range_format::disabled>> {};
+
+template <typename R, typename Char>
+struct formatter<
+    R, Char,
+    enable_if_t<conjunction<bool_constant<range_format_kind<R, Char>::value !=
+                                          range_format::disabled>
+// Workaround a bug in MSVC 2015 and earlier.
+#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
+                            ,
+                            detail::is_formattable_delayed<R, Char>
+#endif
+                            >::value>>
+    : detail::range_default_formatter<range_format_kind<R, Char>::value, R,
+                                      Char> {
+};
+
+template <typename Char, typename... T> struct tuple_join_view : detail::view {
+  const std::tuple<T...>& tuple;
+  basic_string_view<Char> sep;
+
+  tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
+      : tuple(t), sep{s} {}
+};
+
+template <typename Char, typename... T>
+using tuple_arg_join = tuple_join_view<Char, T...>;
+
+// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers
+// support in tuple_join. It is disabled by default because of issues with
+// the dynamic width and precision.
+#ifndef FMT_TUPLE_JOIN_SPECIFIERS
+#  define FMT_TUPLE_JOIN_SPECIFIERS 0
+#endif
+
+template <typename Char, typename... T>
+struct formatter<tuple_join_view<Char, T...>, Char> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return do_parse(ctx, std::integral_constant<size_t, sizeof...(T)>());
+  }
+
+  template <typename FormatContext>
+  auto format(const tuple_join_view<Char, T...>& value,
+              FormatContext& ctx) const -> typename FormatContext::iterator {
+    return do_format(value, ctx,
+                     std::integral_constant<size_t, sizeof...(T)>());
+  }
+
+ private:
+  std::tuple<formatter<typename std::decay<T>::type, Char>...> formatters_;
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+                              std::integral_constant<size_t, 0>)
+      -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename ParseContext, size_t N>
+  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
+                              std::integral_constant<size_t, N>)
+      -> decltype(ctx.begin()) {
+    auto end = ctx.begin();
+#if FMT_TUPLE_JOIN_SPECIFIERS
+    end = std::get<sizeof...(T) - N>(formatters_).parse(ctx);
+    if (N > 1) {
+      auto end1 = do_parse(ctx, std::integral_constant<size_t, N - 1>());
+      if (end != end1)
+        FMT_THROW(format_error("incompatible format specs for tuple elements"));
+    }
+#endif
+    return end;
+  }
+
+  template <typename FormatContext>
+  auto do_format(const tuple_join_view<Char, T...>&, FormatContext& ctx,
+                 std::integral_constant<size_t, 0>) const ->
+      typename FormatContext::iterator {
+    return ctx.out();
+  }
+
+  template <typename FormatContext, size_t N>
+  auto do_format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
+                 std::integral_constant<size_t, N>) const ->
+      typename FormatContext::iterator {
+    auto out = std::get<sizeof...(T) - N>(formatters_)
+                   .format(std::get<sizeof...(T) - N>(value.tuple), ctx);
+    if (N > 1) {
+      out = std::copy(value.sep.begin(), value.sep.end(), out);
+      ctx.advance_to(out);
+      return do_format(value, ctx, std::integral_constant<size_t, N - 1>());
+    }
+    return out;
+  }
+};
+
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  \rst
+  Returns an object that formats `tuple` with elements separated by `sep`.
+
+  **Example**::
+
+    std::tuple<int, char> t = {1, 'a'};
+    fmt::print("{}", fmt::join(t, ", "));
+    // Output: "1, a"
+  \endrst
+ */
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
+    -> tuple_join_view<char, T...> {
+  return {tuple, sep};
+}
+
+template <typename... T>
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
+                        basic_string_view<wchar_t> sep)
+    -> tuple_join_view<wchar_t, T...> {
+  return {tuple, sep};
+}
+
+/**
+  \rst
+  Returns an object that formats `initializer_list` with elements separated by
+  `sep`.
+
+  **Example**::
+
+    fmt::print("{}", fmt::join({1, 2, 3}, ", "));
+    // Output: "1, 2, 3"
+  \endrst
+ */
+template <typename T>
+auto join(std::initializer_list<T> list, string_view sep)
+    -> join_view<const T*, const T*> {
+  return join(std::begin(list), std::end(list), sep);
+}
+
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_RANGES_H_

libfuse/lib/fmt/std.h

@@ -0,0 +1,171 @@
+// Formatting library for C++ - formatters for standard library types
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_STD_H_
+#define FMT_STD_H_
+
+#include <thread>
+#include <type_traits>
+#include <utility>
+
+#include "ostream.h"
+
+#if FMT_HAS_INCLUDE(<version>)
+#  include <version>
+#endif
+// Checking FMT_CPLUSPLUS for warning suppression in MSVC.
+#if FMT_CPLUSPLUS >= 201703L
+#  if FMT_HAS_INCLUDE(<filesystem>)
+#    include <filesystem>
+#  endif
+#  if FMT_HAS_INCLUDE(<variant>)
+#    include <variant>
+#  endif
+#endif
+
+#ifdef __cpp_lib_filesystem
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename Char>
+void write_escaped_path(basic_memory_buffer<Char>& quoted,
+                        const std::filesystem::path& p) {
+  write_escaped_string<Char>(std::back_inserter(quoted), p.string<Char>());
+}
+#  ifdef _WIN32
+template <>
+inline void write_escaped_path<char>(basic_memory_buffer<char>& quoted,
+                                     const std::filesystem::path& p) {
+  auto s = p.u8string();
+  write_escaped_string<char>(
+      std::back_inserter(quoted),
+      string_view(reinterpret_cast<const char*>(s.c_str()), s.size()));
+}
+#  endif
+template <>
+inline void write_escaped_path<std::filesystem::path::value_type>(
+    basic_memory_buffer<std::filesystem::path::value_type>& quoted,
+    const std::filesystem::path& p) {
+  write_escaped_string<std::filesystem::path::value_type>(
+      std::back_inserter(quoted), p.native());
+}
+
+}  // namespace detail
+
+template <typename Char>
+struct formatter<std::filesystem::path, Char>
+    : formatter<basic_string_view<Char>> {
+  template <typename FormatContext>
+  auto format(const std::filesystem::path& p, FormatContext& ctx) const ->
+      typename FormatContext::iterator {
+    basic_memory_buffer<Char> quoted;
+    detail::write_escaped_path(quoted, p);
+    return formatter<basic_string_view<Char>>::format(
+        basic_string_view<Char>(quoted.data(), quoted.size()), ctx);
+  }
+};
+FMT_END_NAMESPACE
+#endif
+
+FMT_BEGIN_NAMESPACE
+template <typename Char>
+struct formatter<std::thread::id, Char> : basic_ostream_formatter<Char> {};
+FMT_END_NAMESPACE
+
+#ifdef __cpp_lib_variant
+FMT_BEGIN_NAMESPACE
+template <typename Char> struct formatter<std::monostate, Char> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  auto format(const std::monostate&, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    out = detail::write<Char>(out, "monostate");
+    return out;
+  }
+};
+
+namespace detail {
+
+template <typename T>
+using variant_index_sequence =
+    std::make_index_sequence<std::variant_size<T>::value>;
+
+// variant_size and variant_alternative check.
+template <typename T, typename U = void>
+struct is_variant_like_ : std::false_type {};
+template <typename T>
+struct is_variant_like_<T, std::void_t<decltype(std::variant_size<T>::value)>>
+    : std::true_type {};
+
+// formattable element check
+template <typename T, typename C> class is_variant_formattable_ {
+  template <std::size_t... I>
+  static std::conjunction<
+      is_formattable<std::variant_alternative_t<I, T>, C>...>
+      check(std::index_sequence<I...>);
+
+ public:
+  static constexpr const bool value =
+      decltype(check(variant_index_sequence<T>{}))::value;
+};
+
+template <typename Char, typename OutputIt, typename T>
+auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt {
+  if constexpr (is_string<T>::value)
+    return write_escaped_string<Char>(out, detail::to_string_view(v));
+  else if constexpr (std::is_same_v<T, Char>)
+    return write_escaped_char(out, v);
+  else
+    return write<Char>(out, v);
+}
+
+}  // namespace detail
+
+template <typename T> struct is_variant_like {
+  static constexpr const bool value = detail::is_variant_like_<T>::value;
+};
+
+template <typename T, typename C> struct is_variant_formattable {
+  static constexpr const bool value =
+      detail::is_variant_formattable_<T, C>::value;
+};
+
+template <typename Variant, typename Char>
+struct formatter<
+    Variant, Char,
+    std::enable_if_t<std::conjunction_v<
+        is_variant_like<Variant>, is_variant_formattable<Variant, Char>>>> {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
+
+  template <typename FormatContext>
+  auto format(const Variant& value, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto out = ctx.out();
+
+    out = detail::write<Char>(out, "variant(");
+    std::visit(
+        [&](const auto& v) {
+          out = detail::write_variant_alternative<Char>(out, v);
+        },
+        value);
+    *out++ = ')';
+    return out;
+  }
+};
+FMT_END_NAMESPACE
+#endif
+
+#endif  // FMT_STD_H_

libfuse/lib/fmt/xchar.h

@@ -0,0 +1,229 @@
+// Formatting library for C++ - optional wchar_t and exotic character support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_XCHAR_H_
+#define FMT_XCHAR_H_
+
+#include <cwchar>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename T>
+using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
+}
+
+FMT_MODULE_EXPORT_BEGIN
+
+using wstring_view = basic_string_view<wchar_t>;
+using wformat_parse_context = basic_format_parse_context<wchar_t>;
+using wformat_context = buffer_context<wchar_t>;
+using wformat_args = basic_format_args<wformat_context>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename... Args> using wformat_string = wstring_view;
+inline auto runtime(wstring_view s) -> wstring_view { return s; }
+#else
+template <typename... Args>
+using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
+inline auto runtime(wstring_view s) -> basic_runtime<wchar_t> { return {{s}}; }
+#endif
+
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<detail::char8_type> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
+
+template <typename... Args>
+constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
+    const Args&... args) {
+  return {args...};
+}
+
+inline namespace literals {
+#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS
+constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
+  return {s};
+}
+#endif
+}  // namespace literals
+
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, wstring_view sep)
+    -> join_view<It, Sentinel, wchar_t> {
+  return {begin, end, sep};
+}
+
+template <typename Range>
+auto join(Range&& range, wstring_view sep)
+    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
+                 wchar_t> {
+  return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename T>
+auto join(std::initializer_list<T> list, wstring_view sep)
+    -> join_view<const T*, const T*, wchar_t> {
+  return join(std::begin(list), std::end(list), sep);
+}
+
+template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto vformat(basic_string_view<Char> format_str,
+             basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  detail::vformat_to(buffer, format_str, args);
+  return to_string(buffer);
+}
+
+template <typename... T>
+auto format(wformat_string<T...> fmt, T&&... args) -> std::wstring {
+  return vformat(fmt::wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(!std::is_same<Char, char>::value &&
+                        !std::is_same<Char, wchar_t>::value)>
+auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> {
+  return vformat(detail::to_string_view(format_str),
+                 fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename Locale, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat(
+    const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, detail::to_string_view(format_str), args);
+}
+
+template <typename Locale, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format(const Locale& loc, const S& format_str, Args&&... args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, detail::to_string_view(format_str),
+                         fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+auto vformat_to(OutputIt out, const S& format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  detail::vformat_to(buf, detail::to_string_view(format_str), args);
+  return detail::get_iterator(buf);
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt {
+  return vformat_to(out, detail::to_string_view(fmt),
+                    fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename Locale, typename S, typename OutputIt, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_locale<Locale>::value&&
+                                detail::is_exotic_char<Char>::value)>
+inline auto vformat_to(
+    OutputIt out, const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  vformat_to(buf, detail::to_string_view(format_str), args,
+             detail::locale_ref(loc));
+  return detail::get_iterator(buf);
+}
+
+template <
+    typename OutputIt, typename Locale, typename S, typename... Args,
+    typename Char = char_t<S>,
+    bool enable = detail::is_output_iterator<OutputIt, Char>::value&&
+        detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value>
+inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  return vformat_to(out, loc, to_string_view(format_str),
+                    fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename OutputIt, typename Char, typename... Args,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat_to_n(
+    OutputIt out, size_t n, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> format_to_n_result<OutputIt> {
+  detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+                                                                           n);
+  detail::vformat_to(buf, format_str, args);
+  return {buf.out(), buf.count()};
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to_n(OutputIt out, size_t n, const S& fmt,
+                        const Args&... args) -> format_to_n_result<OutputIt> {
+  return vformat_to_n(out, n, detail::to_string_view(fmt),
+                      fmt::make_format_args<buffer_context<Char>>(args...));
+}
+
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
+inline auto formatted_size(const S& fmt, Args&&... args) -> size_t {
+  detail::counting_buffer<Char> buf;
+  detail::vformat_to(buf, detail::to_string_view(fmt),
+                     fmt::make_format_args<buffer_context<Char>>(args...));
+  return buf.count();
+}
+
+inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
+  wmemory_buffer buffer;
+  detail::vformat_to(buffer, fmt, args);
+  buffer.push_back(L'\0');
+  if (std::fputws(buffer.data(), f) == -1)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+inline void vprint(wstring_view fmt, wformat_args args) {
+  vprint(stdout, fmt, args);
+}
+
+template <typename... T>
+void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
+  return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
+  return vprint(wstring_view(fmt), fmt::make_wformat_args(args...));
+}
+
+/**
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+ */
+template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
+  return format(FMT_STRING(L"{}"), value);
+}
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_XCHAR_H_

libfuse/lib/format.cpp

@@ -0,0 +1,47 @@
+// Formatting library for C++
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#include "fmt/format-inl.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template FMT_API auto dragonbox::to_decimal(float x) noexcept
+    -> dragonbox::decimal_fp<float>;
+template FMT_API auto dragonbox::to_decimal(double x) noexcept
+    -> dragonbox::decimal_fp<double>;
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template FMT_API locale_ref::locale_ref(const std::locale& loc);
+template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
+#endif
+
+// Explicit instantiations for char.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<char>;
+template FMT_API auto decimal_point_impl(locale_ref) -> char;
+
+template FMT_API void buffer<char>::append(const char*, const char*);
+
+// DEPRECATED!
+// There is no correspondent extern template in format.h because of
+// incompatibility between clang and gcc (#2377).
+template FMT_API void vformat_to(buffer<char>&, string_view,
+                                 basic_format_args<FMT_BUFFER_CONTEXT(char)>,
+                                 locale_ref);
+
+// Explicit instantiations for wchar_t.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<wchar_t>;
+template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+
+template FMT_API void buffer<wchar_t>::append(const wchar_t*, const wchar_t*);
+
+}  // namespace detail
+FMT_END_NAMESPACE

libfuse/lib/fuse_dirents.c

@@ -0,0 +1,406 @@
+#define _FILE_OFFSET_BITS 64
+
+#include "fuse_attr.h"
+#include "fuse_dirent.h"
+#include "fuse_direntplus.h"
+#include "fuse_dirents.h"
+#include "fuse_entry.h"
+#include "linux_dirent64.h"
+#include "stat_utils.h"
+
+#include <dirent.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* 32KB - same as glibc getdents buffer size */
+#define DEFAULT_SIZE (1024 * 32)
+
+static
+uint64_t
+round_up(const uint64_t number_,
+         const uint64_t multiple_)
+{
+  return (((number_ + multiple_ - 1) / multiple_) * multiple_);
+}
+
+static
+uint64_t
+align_uint64_t(uint64_t v_)
+{
+  return ((v_ + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1));
+}
+
+static
+uint64_t
+fuse_dirent_size(const uint64_t namelen_)
+{
+  uint64_t rv;
+
+  rv  = offsetof(fuse_dirent_t,name);
+  rv += namelen_;
+  rv  = align_uint64_t(rv);
+
+  return rv;
+}
+
+static
+uint64_t
+fuse_direntplus_size(const uint64_t namelen_)
+{
+  uint64_t rv;
+
+  rv  = offsetof(fuse_direntplus_t,dirent.name);
+  rv += namelen_;
+  rv  = align_uint64_t(rv);
+
+  return rv;
+}
+
+static
+int
+fuse_dirents_buf_resize(fuse_dirents_t *d_,
+                        uint64_t        size_)
+{
+  if((kv_size(d_->data) + size_) >= kv_max(d_->data))
+    {
+      uint64_t new_size;
+
+      new_size = round_up((kv_size(d_->data) + size_),DEFAULT_SIZE);
+
+      kv_resize(char,d_->data,new_size);
+      if(d_->data.a == NULL)
+        return -ENOMEM;
+    }
+
+  return 0;
+}
+
+static
+void*
+fuse_dirents_dirent_alloc(fuse_dirents_t *d_,
+                          uint64_t        namelen_)
+{
+  int rv;
+  uint64_t size;
+  fuse_dirent_t *d;
+
+  size = fuse_dirent_size(namelen_);
+
+  rv = fuse_dirents_buf_resize(d_,size);
+  if(rv)
+    return NULL;
+
+  d = (fuse_dirent_t*)&kv_end(d_->data);
+  kv_size(d_->data) += size;
+
+  return d;
+}
+
+static
+void*
+fuse_dirents_direntplus_alloc(fuse_dirents_t *d_,
+                              uint64_t        namelen_)
+{
+  int rv;
+  uint64_t size;
+  fuse_dirent_t *d;
+
+  size = fuse_direntplus_size(namelen_);
+
+  rv = fuse_dirents_buf_resize(d_,size);
+  if(rv)
+    return NULL;
+
+  d = (fuse_dirent_t*)&kv_end(d_->data);
+  kv_size(d_->data) += size;
+
+  return d;
+}
+
+static
+void
+fuse_dirents_fill_attr(fuse_attr_t       *attr_,
+                       const struct stat *st_)
+{
+  attr_->ino       = st_->st_ino;
+  attr_->size      = st_->st_size;
+  attr_->blocks    = st_->st_blocks;
+  attr_->atime     = st_->st_atime;
+  attr_->mtime     = st_->st_mtime;
+  attr_->ctime     = st_->st_ctime;
+  attr_->atimensec = ST_ATIM_NSEC(st_);
+  attr_->mtimensec = ST_MTIM_NSEC(st_);
+  attr_->ctimensec = ST_CTIM_NSEC(st_);
+  attr_->mode      = st_->st_mode;
+  attr_->nlink     = st_->st_nlink;
+  attr_->uid       = st_->st_uid;
+  attr_->gid       = st_->st_gid;
+  attr_->rdev      = st_->st_rdev;
+  attr_->blksize   = st_->st_blksize;
+}
+
+fuse_dirent_t*
+fuse_dirent_next(fuse_dirent_t *cur_)
+{
+  char *buf;
+
+  buf  = (char*)cur_;
+  buf += fuse_dirent_size(cur_->namelen);
+
+  return (fuse_dirent_t*)buf;
+}
+
+fuse_direntplus_t*
+fuse_direntplus_next(fuse_direntplus_t *cur_)
+{
+  char *buf;
+
+  buf  = (char*)cur_;
+  buf += fuse_direntplus_size(cur_->dirent.namelen);
+
+  return (fuse_direntplus_t*)buf;
+}
+
+fuse_dirent_t*
+fuse_dirent_find(fuse_dirents_t *d_,
+                 const uint64_t  ino_)
+{
+  fuse_dirent_t *cur;
+  fuse_dirent_t *end;
+
+  if(d_->type != NORMAL)
+    return NULL;
+
+  cur = (fuse_dirent_t*)&kv_first(d_->data);
+  end = (fuse_dirent_t*)&kv_end(d_->data);
+  while(cur < end)
+    {
+      if(cur->ino == ino_)
+        return cur;
+
+      cur = fuse_dirent_next(cur);
+    }
+
+  return NULL;
+}
+
+fuse_direntplus_t*
+fuse_direntplus_find(fuse_dirents_t *d_,
+                     const uint64_t  ino_)
+{
+  fuse_direntplus_t *cur;
+  fuse_direntplus_t *end;
+
+  if(d_->type != PLUS)
+    return NULL;
+
+  cur = (fuse_direntplus_t*)&kv_first(d_->data);
+  end = (fuse_direntplus_t*)&kv_end(d_->data);
+  while(cur < end)
+    {
+      if(cur->dirent.ino == ino_)
+        return cur;
+
+      cur = fuse_direntplus_next(cur);
+    }
+
+  return NULL;
+}
+
+void*
+fuse_dirents_find(fuse_dirents_t *d_,
+                  const uint64_t  ino_)
+{
+  switch(d_->type)
+    {
+    default:
+    case UNSET:
+      return NULL;
+    case NORMAL:
+      return fuse_dirent_find(d_,ino_);
+    case PLUS:
+      return fuse_direntplus_find(d_,ino_);
+    }
+}
+
+int
+fuse_dirents_convert_plus2normal(fuse_dirents_t *d_)
+{
+  return -ENOSYS;
+}
+
+int
+fuse_dirents_add(fuse_dirents_t      *d_,
+                 const struct dirent *dirent_,
+                 const uint64_t       namelen_)
+{
+  fuse_dirent_t *d;
+
+  switch(d_->type)
+    {
+    case UNSET:
+      d_->type = NORMAL;
+      break;
+    case NORMAL:
+      break;
+    case PLUS:
+      return -EINVAL;
+    }
+
+  d = fuse_dirents_dirent_alloc(d_,namelen_);
+  if(d == NULL)
+    return -ENOMEM;
+
+  d->off     = kv_size(d_->offs);
+  kv_push(uint32_t,d_->offs,kv_size(d_->data));
+  d->ino     = dirent_->d_ino;
+  d->namelen = namelen_;
+  d->type    = dirent_->d_type;
+  memcpy(d->name,dirent_->d_name,namelen_);
+
+  return 0;
+}
+
+int
+fuse_dirents_add_plus(fuse_dirents_t      *d_,
+                      const struct dirent *dirent_,
+                      const uint64_t       namelen_,
+                      const fuse_entry_t  *entry_,
+                      const struct stat   *st_)
+{
+  fuse_direntplus_t *d;
+
+  switch(d_->type)
+    {
+    case UNSET:
+      d_->type = PLUS;
+      break;
+    case NORMAL:
+      return -EINVAL;
+    case PLUS:
+      break;
+    }
+
+  d = fuse_dirents_direntplus_alloc(d_,namelen_);
+  if(d == NULL)
+    return -ENOMEM;
+
+  d->dirent.off     = kv_size(d_->offs);
+  kv_push(uint32_t,d_->offs,kv_size(d_->data));
+  d->dirent.ino     = dirent_->d_ino;
+  d->dirent.namelen = namelen_;
+  d->dirent.type    = dirent_->d_type;
+  memcpy(d->dirent.name,dirent_->d_name,namelen_);
+
+  d->entry = *entry_;
+
+  fuse_dirents_fill_attr(&d->attr,st_);
+
+  return 0;
+}
+
+int
+fuse_dirents_add_linux(fuse_dirents_t              *d_,
+                       const struct linux_dirent64 *dirent_,
+                       const uint64_t               namelen_)
+{
+  fuse_dirent_t *d;
+
+  switch(d_->type)
+    {
+    case UNSET:
+      d_->type = NORMAL;
+      break;
+    case NORMAL:
+      break;
+    case PLUS:
+      return -EINVAL;
+    }
+
+  d = fuse_dirents_dirent_alloc(d_,namelen_);
+  if(d == NULL)
+    return -ENOMEM;
+
+  d->off     = kv_size(d_->offs);
+  kv_push(uint32_t,d_->offs,kv_size(d_->data));
+  d->ino     = dirent_->ino;
+  d->namelen = namelen_;
+  d->type    = dirent_->type;
+  memcpy(d->name,dirent_->name,namelen_);
+
+  return 0;
+}
+
+int
+fuse_dirents_add_linux_plus(fuse_dirents_t              *d_,
+                            const struct linux_dirent64 *dirent_,
+                            const uint64_t               namelen_,
+                            const fuse_entry_t          *entry_,
+                            const struct stat           *st_)
+{
+  fuse_direntplus_t *d;
+
+  switch(d_->type)
+    {
+    case UNSET:
+      d_->type = PLUS;
+      break;
+    case NORMAL:
+      return -EINVAL;
+    case PLUS:
+      break;
+    }
+
+  d = fuse_dirents_direntplus_alloc(d_,namelen_);
+  if(d == NULL)
+    return -ENOMEM;
+
+  d->dirent.off     = kv_size(d_->offs);
+  kv_push(uint32_t,d_->offs,kv_size(d_->data));
+  d->dirent.ino     = dirent_->ino;
+  d->dirent.namelen = namelen_;
+  d->dirent.type    = dirent_->type;
+  memcpy(d->dirent.name,dirent_->name,namelen_);
+
+  d->entry = *entry_;
+
+  fuse_dirents_fill_attr(&d->attr,st_);
+
+  return 0;
+}
+
+void
+fuse_dirents_reset(fuse_dirents_t *d_)
+{
+  d_->type          = UNSET;
+  kv_size(d_->data) = 0;
+  kv_size(d_->offs) = 1;
+}
+
+int
+fuse_dirents_init(fuse_dirents_t *d_)
+{
+  d_->type = UNSET;
+
+  kv_init(d_->data);
+  kv_resize(char,d_->data,DEFAULT_SIZE);
+  if(d_->data.a == NULL)
+    return -ENOMEM;
+
+  kv_init(d_->offs);
+  kv_resize(uint32_t,d_->offs,64);
+  kv_push(uint32_t,d_->offs,0);
+
+  return 0;
+}
+
+void
+fuse_dirents_free(fuse_dirents_t *d_)
+{
+  kv_destroy(d_->data);
+  kv_destroy(d_->offs);
+}

libfuse/lib/fuse_i.h

@@ -6,106 +6,90 @@
   See the file COPYING.LIB
 */
 
+#pragma once
+
 #include "fuse.h"
 #include "fuse_lowlevel.h"
+#include "fuse_msgbuf.h"
+
+#include "extern_c.h"
 
 struct fuse_chan;
 struct fuse_ll;
 
-struct fuse_session {
-	struct fuse_session_ops op;
+struct fuse_session
+{
+  int (*receive_buf)(struct fuse_session *se,
+                     fuse_msgbuf_t       *msgbuf);
 
-	int (*receive_buf)(struct fuse_session *se, struct fuse_buf *buf,
-			   struct fuse_chan **chp);
+  void (*process_buf)(struct fuse_session *se,
+                      const fuse_msgbuf_t *msgbuf);
 
-	void (*process_buf)(void *data, const struct fuse_buf *buf,
-			    struct fuse_chan *ch);
+  void (*destroy)(void *data);
 
-	void *data;
-
-	volatile int exited;
-
-	struct fuse_chan *ch;
+  struct fuse_ll *f;
+  volatile int exited;
+  struct fuse_chan *ch;
 };
 
-struct fuse_req {
-	struct fuse_ll *f;
-	uint64_t unique;
-	int ctr;
-	pthread_mutex_t lock;
-	struct fuse_ctx ctx;
-	struct fuse_chan *ch;
-	int interrupted;
-	unsigned int ioctl_64bit : 1;
-	union {
-		struct {
-			uint64_t unique;
-		} i;
-		struct {
-			fuse_interrupt_func_t func;
-			void *data;
-		} ni;
-	} u;
-	struct fuse_req *next;
-	struct fuse_req *prev;
+struct fuse_req
+{
+  struct fuse_ll *f;
+  uint64_t unique;
+  struct fuse_ctx ctx;
+  struct fuse_chan *ch;
+  unsigned int ioctl_64bit : 1;
 };
 
-struct fuse_notify_req {
-	uint64_t unique;
-	void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
-		      const void *, const struct fuse_buf *);
-	struct fuse_notify_req *next;
-	struct fuse_notify_req *prev;
+struct fuse_notify_req
+{
+  uint64_t unique;
+  void (*reply)(struct fuse_notify_req *,
+                fuse_req_t,
+                uint64_t,
+                const void *);
+  struct fuse_notify_req *next;
+  struct fuse_notify_req *prev;
 };
 
-struct fuse_ll {
-	int debug;
-	int allow_root;
-	int atomic_o_trunc;
-	int no_remote_posix_lock;
-	int no_remote_flock;
-	int big_writes;
-	int splice_write;
-	int splice_move;
-	int splice_read;
-	int no_splice_write;
-	int no_splice_move;
-	int no_splice_read;
-	struct fuse_lowlevel_ops op;
-	int got_init;
-	struct cuse_data *cuse_data;
-	void *userdata;
-	uid_t owner;
-	struct fuse_conn_info conn;
-	struct fuse_req list;
-	struct fuse_req interrupts;
-	pthread_mutex_t lock;
-	int got_destroy;
-	pthread_key_t pipe_key;
-	int broken_splice_nonblock;
-	uint64_t notify_ctr;
-	struct fuse_notify_req notify_list;
+struct fuse_ll
+{
+  int debug;
+  int no_remote_posix_lock;
+  int no_remote_flock;
+  int big_writes;
+  struct fuse_lowlevel_ops op;
+  void *userdata;
+  uid_t owner;
+  struct fuse_conn_info conn;
+  pthread_mutex_t lock;
+  int got_init;
+  int got_destroy;
+  pthread_key_t pipe_key;
+  int broken_splice_nonblock;
+  uint64_t notify_ctr;
+  struct fuse_notify_req notify_list;
 };
 
-struct fuse_cmd {
-	char *buf;
-	size_t buflen;
-	struct fuse_chan *ch;
+struct fuse_cmd
+{
+  char *buf;
+  size_t buflen;
+  struct fuse_chan *ch;
 };
 
+EXTERN_C_BEGIN
+
 struct fuse *fuse_new_common(struct fuse_chan *ch, struct fuse_args *args,
 			     const struct fuse_operations *op,
-			     size_t op_size, void *user_data, int compat);
-
-int fuse_sync_compat_args(struct fuse_args *args);
+			     size_t op_size);
 
 struct fuse_chan *fuse_kern_chan_new(int fd);
 
 struct fuse_session *fuse_lowlevel_new_common(struct fuse_args *args,
-					const struct fuse_lowlevel_ops *op,
-					size_t op_size, void *userdata);
+                                              const struct fuse_lowlevel_ops *op,
+                                              size_t op_size, void *userdata);
 
-void fuse_kern_unmount_compat22(const char *mountpoint);
 int fuse_chan_clearfd(struct fuse_chan *ch);
 
 void fuse_kern_unmount(const char *mountpoint, int fd);
@@ -120,11 +104,8 @@ struct fuse *fuse_setup_common(int argc, char *argv[],
 			       const struct fuse_operations *op,
 			       size_t op_size,
 			       char **mountpoint,
-			       int *multithreaded,
-			       int *fd,
-			       void *user_data,
-			       int compat);
-
-void cuse_lowlevel_init(fuse_req_t req, fuse_ino_t nodeide, const void *inarg);
+			       int *fd);
 
 int fuse_start_thread(pthread_t *thread_id, void *(*func)(void *), void *arg);
+
+EXTERN_C_END

libfuse/lib/fuse_kern_chan.c

@@ -1,98 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
-
-#include "fuse_lowlevel.h"
-#include "fuse_kernel.h"
-#include "fuse_i.h"
-
-#include <stdio.h>
-#include <errno.h>
-#include <unistd.h>
-#include <assert.h>
-
-static int fuse_kern_chan_receive(struct fuse_chan **chp, char *buf,
-				  size_t size)
-{
-	struct fuse_chan *ch = *chp;
-	int err;
-	ssize_t res;
-	struct fuse_session *se = fuse_chan_session(ch);
-	assert(se != NULL);
-
-restart:
-	res = read(fuse_chan_fd(ch), buf, size);
-	err = errno;
-
-	if (fuse_session_exited(se))
-		return 0;
-	if (res == -1) {
-		/* ENOENT means the operation was interrupted, it's safe
-		   to restart */
-		if (err == ENOENT)
-			goto restart;
-
-		if (err == ENODEV) {
-			fuse_session_exit(se);
-			return 0;
-		}
-		/* Errors occurring during normal operation: EINTR (read
-		   interrupted), EAGAIN (nonblocking I/O), ENODEV (filesystem
-		   umounted) */
-		if (err != EINTR && err != EAGAIN)
-			perror("fuse: reading device");
-		return -err;
-	}
-	if ((size_t) res < sizeof(struct fuse_in_header)) {
-		fprintf(stderr, "short read on fuse device\n");
-		return -EIO;
-	}
-	return res;
-}
-
-static int fuse_kern_chan_send(struct fuse_chan *ch, const struct iovec iov[],
-			       size_t count)
-{
-	if (iov) {
-		ssize_t res = writev(fuse_chan_fd(ch), iov, count);
-		int err = errno;
-
-		if (res == -1) {
-			struct fuse_session *se = fuse_chan_session(ch);
-
-			assert(se != NULL);
-
-			/* ENOENT means the operation was interrupted */
-			if (!fuse_session_exited(se) && err != ENOENT)
-				perror("fuse: writing device");
-			return -err;
-		}
-	}
-	return 0;
-}
-
-static void fuse_kern_chan_destroy(struct fuse_chan *ch)
-{
-	int fd = fuse_chan_fd(ch);
-
-	if (fd != -1)
-		close(fd);
-}
-
-#define MIN_BUFSIZE 0x21000
-
-struct fuse_chan *fuse_kern_chan_new(int fd)
-{
-	struct fuse_chan_ops op = {
-		.receive = fuse_kern_chan_receive,
-		.send = fuse_kern_chan_send,
-		.destroy = fuse_kern_chan_destroy,
-	};
-	size_t bufsize = getpagesize() + 0x1000;
-	bufsize = bufsize < MIN_BUFSIZE ? MIN_BUFSIZE : bufsize;
-	return fuse_chan_new(&op, fd, bufsize, NULL);
-}

libfuse/lib/fuse_ll.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "fuse_msgbuf.h"
+
+int fuse_receive_buf(struct fuse_session *se,
+                     fuse_msgbuf_t       *msgbuf);
+void fuse_process_buf(void *data,
+                      const fuse_msgbuf_t *msgbuf,
+                      struct fuse_chan *ch);

libfuse/lib/fuse_loop.c

@@ -1,46 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
-
-#include "fuse_lowlevel.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-
-int fuse_session_loop(struct fuse_session *se)
-{
-	int res = 0;
-	struct fuse_chan *ch = fuse_session_next_chan(se, NULL);
-	size_t bufsize = fuse_chan_bufsize(ch);
-	char *buf = (char *) malloc(bufsize);
-	if (!buf) {
-		fprintf(stderr, "fuse: failed to allocate read buffer\n");
-		return -1;
-	}
-
-	while (!fuse_session_exited(se)) {
-		struct fuse_chan *tmpch = ch;
-		struct fuse_buf fbuf = {
-			.mem = buf,
-			.size = bufsize,
-		};
-
-		res = fuse_session_receive_buf(se, &fbuf, &tmpch);
-
-		if (res == -EINTR)
-			continue;
-		if (res <= 0)
-			break;
-
-		fuse_session_process_buf(se, &fbuf, tmpch);
-	}
-
-	free(buf);
-	fuse_session_reset(se);
-	return res < 0 ? -1 : 0;
-}

libfuse/lib/fuse_loop_mt.c

@@ -1,225 +0,0 @@
-/*
-  FUSE: Filesystem in Userspace
-  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB.
-*/
-
-#include "fuse_lowlevel.h"
-#include "fuse_misc.h"
-#include "fuse_kernel.h"
-#include "fuse_i.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <signal.h>
-#include <semaphore.h>
-#include <errno.h>
-#include <sys/time.h>
-#include <unistd.h>
-
-/* Environment var controlling the thread stack size */
-#define ENVNAME_THREAD_STACK "FUSE_THREAD_STACK"
-
-struct fuse_worker {
-	struct fuse_worker *prev;
-	struct fuse_worker *next;
-	pthread_t thread_id;
-	size_t bufsize;
-	char *buf;
-	struct fuse_mt *mt;
-};
-
-struct fuse_mt {
-	struct fuse_session *se;
-	struct fuse_chan *prevch;
-	struct fuse_worker main;
-	sem_t finish;
-	int exit;
-	int error;
-};
-
-static void list_add_worker(struct fuse_worker *w, struct fuse_worker *next)
-{
-	struct fuse_worker *prev = next->prev;
-	w->next = next;
-	w->prev = prev;
-	prev->next = w;
-	next->prev = w;
-}
-
-static void list_del_worker(struct fuse_worker *w)
-{
-	struct fuse_worker *prev = w->prev;
-	struct fuse_worker *next = w->next;
-	prev->next = next;
-	next->prev = prev;
-}
-
-static int fuse_loop_start_thread(struct fuse_mt *mt);
-
-static void *fuse_do_work(void *data)
-{
-	struct fuse_worker *w  = (struct fuse_worker *) data;
-	struct fuse_mt     *mt = w->mt;
-
-	while (!fuse_session_exited(mt->se)) {
-		struct fuse_chan *ch = mt->prevch;
-		struct fuse_buf fbuf = {
-			.mem = w->buf,
-			.size = w->bufsize,
-		};
-		int res;
-
-		pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
-		res = fuse_session_receive_buf(mt->se, &fbuf, &ch);
-		pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
-		if (res == -EINTR)
-			continue;
-		if (res <= 0) {
-			if (res < 0) {
-				fuse_session_exit(mt->se);
-				mt->error = -1;
-			}
-			break;
-		}
-
-		if (mt->exit)
-			return NULL;
-
-		fuse_session_process_buf(mt->se, &fbuf, ch);
-	}
-
-	sem_post(&mt->finish);
-
-	return NULL;
-}
-
-int fuse_start_thread(pthread_t *thread_id, void *(*func)(void *), void *arg)
-{
-	sigset_t oldset;
-	sigset_t newset;
-	int res;
-	pthread_attr_t attr;
-	char *stack_size;
-
-	/* Override default stack size */
-	pthread_attr_init(&attr);
-	stack_size = getenv(ENVNAME_THREAD_STACK);
-	if (stack_size && pthread_attr_setstacksize(&attr, atoi(stack_size)))
-		fprintf(stderr, "fuse: invalid stack size: %s\n", stack_size);
-
-	/* Disallow signal reception in worker threads */
-	sigemptyset(&newset);
-	sigaddset(&newset, SIGTERM);
-	sigaddset(&newset, SIGINT);
-	sigaddset(&newset, SIGHUP);
-	sigaddset(&newset, SIGQUIT);
-	pthread_sigmask(SIG_BLOCK, &newset, &oldset);
-	res = pthread_create(thread_id, &attr, func, arg);
-	pthread_sigmask(SIG_SETMASK, &oldset, NULL);
-	pthread_attr_destroy(&attr);
-	if (res != 0) {
-		fprintf(stderr, "fuse: error creating thread: %s\n",
-			strerror(res));
-		return -1;
-	}
-
-	return 0;
-}
-
-static int fuse_loop_start_thread(struct fuse_mt *mt)
-{
-	int res;
-	struct fuse_worker *w = malloc(sizeof(struct fuse_worker));
-	if (!w) {
-		fprintf(stderr, "fuse: failed to allocate worker structure\n");
-		return -1;
-	}
-	memset(w, 0, sizeof(struct fuse_worker));
-	w->bufsize = fuse_chan_bufsize(mt->prevch);
-	w->buf = malloc(w->bufsize);
-	w->mt = mt;
-	if (!w->buf) {
-		fprintf(stderr, "fuse: failed to allocate read buffer\n");
-		free(w);
-		return -1;
-	}
-
-	res = fuse_start_thread(&w->thread_id, fuse_do_work, w);
-	if (res == -1) {
-		free(w->buf);
-		free(w);
-		return -1;
-	}
-	list_add_worker(w, &mt->main);
-
-	return 0;
-}
-
-static void fuse_join_worker(struct fuse_worker *w)
-{
-	pthread_join(w->thread_id, NULL);
-	list_del_worker(w);
-	free(w->buf);
-	free(w);
-}
-
-static int number_of_threads(void)
-{
-#ifdef _SC_NPROCESSORS_ONLN
-  return sysconf(_SC_NPROCESSORS_ONLN);
-#endif
-
-  return 4;
-}
-
-int fuse_session_loop_mt(struct fuse_session *se,
-                         const int            _threads)
-{
-        int i;
-	int err;
-        int threads;
-	struct fuse_mt mt;
-	struct fuse_worker *w;
-
-	memset(&mt, 0, sizeof(struct fuse_mt));
-	mt.se = se;
-	mt.prevch = fuse_session_next_chan(se, NULL);
-	mt.error = 0;
-	mt.main.thread_id = pthread_self();
-	mt.main.prev = mt.main.next = &mt.main;
-	sem_init(&mt.finish, 0, 0);
-
-        threads = ((_threads > 0) ? _threads : number_of_threads());
-        if(_threads < 0)
-          threads /= -_threads;
-        if(threads == 0)
-          threads = 1;
-
-        err = 0;
-        for(i = 0; (i < threads) && !err; i++)
-          err = fuse_loop_start_thread(&mt);
-
-	if (!err) {
-		/* sem_wait() is interruptible */
-		while (!fuse_session_exited(se))
-			sem_wait(&mt.finish);
-
-		for (w = mt.main.next; w != &mt.main; w = w->next)
-			pthread_cancel(w->thread_id);
-		mt.exit = 1;
-
-		while (mt.main.next != &mt.main)
-			fuse_join_worker(mt.main.next);
-
-		err = mt.error;
-	}
-
-	sem_destroy(&mt.finish);
-	fuse_session_reset(se);
-	return err;
-}

libfuse/lib/fuse_loop_mt.cpp

@@ -0,0 +1,487 @@
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include "bounded_thread_pool.hpp"
+#include "cpu.hpp"
+#include "fmt/core.h"
+
+#include "fuse_i.h"
+#include "fuse_kernel.h"
+#include "fuse_lowlevel.h"
+#include "fuse_misc.h"
+
+#include "fuse_msgbuf.hpp"
+#include "fuse_ll.hpp"
+
+#include <errno.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include <cassert>
+#include <vector>
+
+
+struct fuse_worker_data_t
+{
+  struct fuse_session *se;
+  sem_t finished;
+  std::function<void(fuse_worker_data_t*,fuse_msgbuf_t*)> msgbuf_processor;
+  std::shared_ptr<BoundedThreadPool> tp;
+};
+
+class WorkerCleanup
+{
+public:
+  WorkerCleanup(fuse_worker_data_t *wd_)
+    : _wd(wd_)
+  {
+  }
+
+  ~WorkerCleanup()
+  {
+    fuse_session_exit(_wd->se);
+    sem_post(&_wd->finished);
+  }
+
+private:
+  fuse_worker_data_t *_wd;
+};
+
+static
+bool
+retriable_receive_error(const int err_)
+{
+  switch(err_)
+    {
+    case -EINTR:
+    case -EAGAIN:
+    case -ENOENT:
+      return true;
+    default:
+      return false;
+    }
+}
+
+static
+bool
+fatal_receive_error(const int err_)
+{
+  return (err_ < 0);
+}
+
+static
+void*
+handle_receive_error(const int      rv_,
+                     fuse_msgbuf_t *msgbuf_)
+{
+  msgbuf_free(msgbuf_);
+
+  fprintf(stderr,
+          "mergerfs: error reading from /dev/fuse - %s (%d)\n",
+          strerror(-rv_),
+          -rv_);
+
+  return NULL;
+}
+
+static
+void*
+fuse_do_work(void *data)
+{
+  fuse_worker_data_t *wd = (fuse_worker_data_t*)data;
+  fuse_session       *se = wd->se;
+  auto               &process_msgbuf = wd->msgbuf_processor;
+  WorkerCleanup       workercleanup(wd);
+
+  while(!fuse_session_exited(se))
+    {
+      int rv;
+      fuse_msgbuf_t *msgbuf;
+
+      msgbuf = msgbuf_alloc();
+
+      do
+        {
+          pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,NULL);
+          rv = se->receive_buf(se,msgbuf);
+          pthread_setcancelstate(PTHREAD_CANCEL_DISABLE,NULL);
+          if(rv == 0)
+            return NULL;
+          if(retriable_receive_error(rv))
+            continue;
+          if(fatal_receive_error(rv))
+            return handle_receive_error(rv,msgbuf);
+        } while(false);
+
+      process_msgbuf(wd,msgbuf);
+    }
+
+  return NULL;
+}
+
+int
+fuse_start_thread(pthread_t *thread_id,
+                  void      *(*func)(void *),
+                  void      *arg)
+{
+  int res;
+  sigset_t oldset;
+  sigset_t newset;
+
+  sigfillset(&newset);
+  pthread_sigmask(SIG_BLOCK,&newset,&oldset);
+  res = pthread_create(thread_id,NULL,func,arg);
+  pthread_sigmask(SIG_SETMASK,&oldset,NULL);
+
+  if(res != 0)
+    {
+      fprintf(stderr,
+              "fuse: error creating thread: %s\n",
+              strerror(res));
+      return -1;
+    }
+
+  return 0;
+}
+
+static
+int
+calculate_thread_count(const int raw_thread_count_)
+{
+  int thread_count;
+
+  thread_count = 4;
+  if(raw_thread_count_ == 0)
+    thread_count = std::thread::hardware_concurrency();
+  else if(raw_thread_count_ < 0)
+    thread_count = (std::thread::hardware_concurrency() / -raw_thread_count_);
+  else if(raw_thread_count_ > 0)
+    thread_count = raw_thread_count_;
+
+  if(thread_count <= 0)
+    thread_count = 1;
+
+  return thread_count;
+}
+
+static
+void
+calculate_thread_counts(int *read_thread_count_,
+                        int *process_thread_count_)
+{
+  if((*read_thread_count_ == -1) && (*process_thread_count_ == -1))
+    {
+      int nproc;
+
+      nproc = std::thread::hardware_concurrency();
+      *read_thread_count_ = 2;
+      *process_thread_count_ = std::max(2,(nproc - 2));
+    }
+  else
+    {
+      *read_thread_count_ = ::calculate_thread_count(*read_thread_count_);
+      if(*process_thread_count_ != -1)
+        *process_thread_count_ = ::calculate_thread_count(*process_thread_count_);
+    }
+}
+
+static
+void
+process_msgbuf_sync(fuse_worker_data_t *wd_,
+                    fuse_msgbuf_t      *msgbuf_)
+{
+  wd_->se->process_buf(wd_->se,msgbuf_);
+  msgbuf_free(msgbuf_);
+}
+
+static
+void
+process_msgbuf_async(fuse_worker_data_t *wd_,
+                     fuse_msgbuf_t      *msgbuf_)
+{
+  const auto func = [=] {
+    process_msgbuf_sync(wd_,msgbuf_);
+  };
+
+  wd_->tp->enqueue_work(func);
+}
+
+static
+void
+pin_threads_R1L(const CPU::ThreadIdVec read_threads_)
+{
+  CPU::CPUVec cpus;
+
+  cpus = CPU::cpus();
+  if(cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,cpus.front());
+}
+
+static
+void
+pin_threads_R1P(const CPU::ThreadIdVec read_threads_)
+{
+  CPU::Core2CPUsMap core2cpus;
+
+  core2cpus = CPU::core2cpus();
+  if(core2cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+}
+
+static
+void
+pin_threads_RP1L(const CPU::ThreadIdVec read_threads_,
+                 const CPU::ThreadIdVec process_threads_)
+{
+  CPU::CPUVec cpus;
+
+  cpus = CPU::cpus();
+  if(cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,cpus.front());
+  for(auto const thread_id : process_threads_)
+    CPU::setaffinity(thread_id,cpus.front());
+}
+
+static
+void
+pin_threads_RP1P(const CPU::ThreadIdVec read_threads_,
+                 const CPU::ThreadIdVec process_threads_)
+{
+  CPU::Core2CPUsMap core2cpus;
+
+  core2cpus = CPU::core2cpus();
+  if(core2cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+  for(auto const thread_id : process_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+}
+
+static
+void
+pin_threads_R1LP1L(const std::vector<pthread_t> read_threads_,
+                   const std::vector<pthread_t> process_threads_)
+{
+  CPU::CPUVec cpus;
+
+  cpus = CPU::cpus();
+  if(cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,cpus.front());
+
+  for(auto const thread_id : process_threads_)
+    CPU::setaffinity(thread_id,cpus.back());
+}
+
+static
+void
+pin_threads_R1PP1P(const std::vector<pthread_t> read_threads_,
+                   const std::vector<pthread_t> process_threads_)
+{
+  CPU::Core2CPUsMap core2cpus;
+
+  core2cpus = CPU::core2cpus();
+  if(core2cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+
+  if(core2cpus.size() > 1)
+    core2cpus.erase(core2cpus.begin());
+
+  for(auto const thread_id : process_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+}
+
+static
+void
+pin_threads_RPSL(const std::vector<pthread_t> read_threads_,
+                 const std::vector<pthread_t> process_threads_)
+{
+  CPU::CPUVec cpus;
+
+  cpus = CPU::cpus();
+  if(cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    {
+      if(cpus.empty())
+        cpus = CPU::cpus();
+      CPU::setaffinity(thread_id,cpus.back());
+      cpus.pop_back();
+    }
+
+  for(auto const thread_id : process_threads_)
+    {
+      if(cpus.empty())
+        cpus = CPU::cpus();
+      CPU::setaffinity(thread_id,cpus.back());
+      cpus.pop_back();
+    }
+}
+
+static
+void
+pin_threads_RPSP(const std::vector<pthread_t> read_threads_,
+                 const std::vector<pthread_t> process_threads_)
+{
+  CPU::Core2CPUsMap core2cpus;
+
+  core2cpus = CPU::core2cpus();
+  if(core2cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    {
+      if(core2cpus.empty())
+        core2cpus = CPU::core2cpus();
+      CPU::setaffinity(thread_id,core2cpus.begin()->second);
+      core2cpus.erase(core2cpus.begin());
+    }
+
+  for(auto const thread_id : process_threads_)
+    {
+      if(core2cpus.empty())
+        core2cpus = CPU::core2cpus();
+      CPU::setaffinity(thread_id,core2cpus.begin()->second);
+      core2cpus.erase(core2cpus.begin());
+    }
+}
+
+static
+void
+pin_threads_R1PPSP(const std::vector<pthread_t> read_threads_,
+                   const std::vector<pthread_t> process_threads_)
+{
+  CPU::Core2CPUsMap core2cpus;
+  CPU::Core2CPUsMap leftover;
+
+  core2cpus = CPU::core2cpus();
+  if(core2cpus.empty())
+    return;
+
+  for(auto const thread_id : read_threads_)
+    CPU::setaffinity(thread_id,core2cpus.begin()->second);
+
+  core2cpus.erase(core2cpus.begin());
+  if(core2cpus.empty())
+    core2cpus = CPU::core2cpus();
+  leftover = core2cpus;
+
+  for(auto const thread_id : process_threads_)
+    {
+      if(core2cpus.empty())
+        core2cpus = leftover;
+      CPU::setaffinity(thread_id,core2cpus.begin()->second);
+      core2cpus.erase(core2cpus.begin());
+    }
+}
+
+static
+void
+pin_threads(const std::vector<pthread_t>  read_threads_,
+            const std::vector<pthread_t>  process_threads_,
+            const std::string             type_)
+{
+  if(type_ == "R1L")
+    return ::pin_threads_R1L(read_threads_);
+  if(type_ == "R1P")
+    return ::pin_threads_R1P(read_threads_);
+  if(type_ == "RP1L")
+    return ::pin_threads_RP1L(read_threads_,process_threads_);
+  if(type_ == "RP1P")
+    return ::pin_threads_RP1P(read_threads_,process_threads_);
+  if(type_ == "R1LP1L")
+    return ::pin_threads_R1LP1L(read_threads_,process_threads_);
+  if(type_ == "R1PP1P")
+    return ::pin_threads_R1PP1P(read_threads_,process_threads_);
+  if(type_ == "RPSL")
+    return ::pin_threads_RPSL(read_threads_,process_threads_);
+  if(type_ == "RPSP")
+    return ::pin_threads_RPSP(read_threads_,process_threads_);
+  if(type_ == "R1PPSP")
+    return ::pin_threads_R1PPSP(read_threads_,process_threads_);
+}
+
+int
+fuse_session_loop_mt(struct fuse_session *se_,
+                     const int            raw_read_thread_count_,
+                     const int            raw_process_thread_count_,
+                     const char          *pin_threads_type_)
+{
+  int err;
+  int read_thread_count;
+  int process_thread_count;
+  fuse_worker_data_t wd = {0};
+  std::vector<pthread_t> read_threads;
+  std::vector<pthread_t> process_threads;
+
+  read_thread_count    = raw_read_thread_count_;
+  process_thread_count = raw_process_thread_count_;
+  ::calculate_thread_counts(&read_thread_count,&process_thread_count);
+
+  if(process_thread_count > 0)
+    {
+      wd.tp = std::make_shared<BoundedThreadPool>(process_thread_count);
+      wd.msgbuf_processor = process_msgbuf_async;
+      process_threads = wd.tp->threads();
+    }
+  else
+    {
+      wd.msgbuf_processor = process_msgbuf_sync;
+    }
+
+  wd.se = se_;
+  sem_init(&wd.finished,0,0);
+
+  err = 0;
+  for(int i = 0; i < read_thread_count; i++)
+    {
+      pthread_t thread_id;
+      err = fuse_start_thread(&thread_id,fuse_do_work,&wd);
+      assert(err == 0);
+      read_threads.push_back(thread_id);
+    }
+
+  if(pin_threads_type_ != NULL)
+    ::pin_threads(read_threads,process_threads,pin_threads_type_);
+
+  if(!err)
+    {
+      /* sem_wait() is interruptible */
+      while(!fuse_session_exited(se_))
+        sem_wait(&wd.finished);
+
+      for(const auto &thread_id : read_threads)
+        pthread_cancel(thread_id);
+
+      for(const auto &thread_id : read_threads)
+        pthread_join(thread_id,NULL);
+    }
+
+  sem_destroy(&wd.finished);
+
+  return err;
+}

libfuse/lib/fuse_misc.h

@@ -6,13 +6,16 @@
   See the file COPYING.LIB
 */
 
+#pragma once
+
 #include "config.h"
+
 #include <pthread.h>
 
 /*
   Versioned symbols cannot be used in some cases because it
-    - confuse the dynamic linker in uClibc
-    - not supported on MacOSX (in MachO binary format)
+  - confuse the dynamic linker in uClibc
+  - not supported on MacOSX (in MachO binary format)
 */
 #if (!defined(__UCLIBC__) && !defined(__APPLE__))
 #define FUSE_SYMVER(x) __asm__(x)
@@ -26,32 +29,35 @@
 /* Is this hack still needed? */
 static inline void fuse_mutex_init(pthread_mutex_t *mut)
 {
-	pthread_mutexattr_t attr;
-	pthread_mutexattr_init(&attr);
-	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
-	pthread_mutex_init(mut, &attr);
-	pthread_mutexattr_destroy(&attr);
+  pthread_mutexattr_t attr;
+  pthread_mutexattr_init(&attr);
+  pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
+  pthread_mutex_init(mut, &attr);
+  pthread_mutexattr_destroy(&attr);
 }
 #endif
 
 #ifdef HAVE_STRUCT_STAT_ST_ATIM
 /* Linux */
-#define ST_ATIM_NSEC(stbuf) ((stbuf)->st_atim.tv_nsec)
-#define ST_CTIM_NSEC(stbuf) ((stbuf)->st_ctim.tv_nsec)
-#define ST_MTIM_NSEC(stbuf) ((stbuf)->st_mtim.tv_nsec)
-#define ST_ATIM_NSEC_SET(stbuf, val) (stbuf)->st_atim.tv_nsec = (val)
-#define ST_MTIM_NSEC_SET(stbuf, val) (stbuf)->st_mtim.tv_nsec = (val)
+#define ST_ATIM_NSEC(stbuf)         ((stbuf)->st_atim.tv_nsec)
+#define ST_CTIM_NSEC(stbuf)         ((stbuf)->st_ctim.tv_nsec)
+#define ST_MTIM_NSEC(stbuf)         ((stbuf)->st_mtim.tv_nsec)
+#define ST_ATIM_NSEC_SET(stbuf,val) ((stbuf)->st_atim.tv_nsec = (val))
+#define ST_CTIM_NSEC_SET(stbuf,val) ((stbuf)->st_ctim.tv_nsec = (val))
+#define ST_MTIM_NSEC_SET(stbuf,val) ((stbuf)->st_mtim.tv_nsec = (val))
 #elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC)
 /* FreeBSD */
-#define ST_ATIM_NSEC(stbuf) ((stbuf)->st_atimespec.tv_nsec)
-#define ST_CTIM_NSEC(stbuf) ((stbuf)->st_ctimespec.tv_nsec)
-#define ST_MTIM_NSEC(stbuf) ((stbuf)->st_mtimespec.tv_nsec)
-#define ST_ATIM_NSEC_SET(stbuf, val) (stbuf)->st_atimespec.tv_nsec = (val)
-#define ST_MTIM_NSEC_SET(stbuf, val) (stbuf)->st_mtimespec.tv_nsec = (val)
+#define ST_ATIM_NSEC(stbuf)         ((stbuf)->st_atimespec.tv_nsec)
+#define ST_CTIM_NSEC(stbuf)         ((stbuf)->st_ctimespec.tv_nsec)
+#define ST_MTIM_NSEC(stbuf)         ((stbuf)->st_mtimespec.tv_nsec)
+#define ST_ATIM_NSEC_SET(stbuf,val) ((stbuf)->st_atimespec.tv_nsec = (val))
+#define ST_CTIM_NSEC_SET(stbuf,val) ((stbuf)->st_ctimespec.tv_nsec = (val))
+#define ST_MTIM_NSEC_SET(stbuf,val) ((stbuf)->st_mtimespec.tv_nsec = (val))
 #else
 #define ST_ATIM_NSEC(stbuf) 0
 #define ST_CTIM_NSEC(stbuf) 0
 #define ST_MTIM_NSEC(stbuf) 0
-#define ST_ATIM_NSEC_SET(stbuf, val) do { } while (0)
-#define ST_MTIM_NSEC_SET(stbuf, val) do { } while (0)
+#define ST_ATIM_NSEC_SET(stbuf,val) do { } while (0)
+#define ST_CTIM_NSEC_SET(stbuf,val) do { } while (0)
+#define ST_MTIM_NSEC_SET(stbuf,val) do { } while (0)
 #endif

libfuse/lib/fuse_msgbuf.cpp

@@ -0,0 +1,160 @@
+/*
+  ISC License
+
+  Copyright (c) 2022, Antonio SJ Musumeci <trapexit@spawn.link>
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "fuse_msgbuf.hpp"
+#include "fuse.h"
+
+#include <unistd.h>
+
+#include <cstdint>
+#include <cstdlib>
+#include <mutex>
+#include <vector>
+#include <unordered_set>
+#include <atomic>
+
+
+static std::uint32_t g_PAGESIZE   = 0;
+static std::uint32_t g_BUFSIZE    = 0;
+static std::uint32_t g_MAX_ALLOCS = 128;
+
+static std::mutex g_MUTEX;
+static std::vector<fuse_msgbuf_t*> g_MSGBUF_STACK;
+static std::unordered_set<fuse_msgbuf_t*> g_MSGBUF_ALLOCED;
+
+static
+__attribute__((constructor))
+void
+msgbuf_constructor()
+{
+  g_PAGESIZE = sysconf(_SC_PAGESIZE);
+  // +2 because to do O_DIRECT we need to offset the buffer to align
+  g_BUFSIZE  = (g_PAGESIZE * (FUSE_MAX_MAX_PAGES + 2));
+}
+
+static
+__attribute__((destructor))
+void
+msgbuf_destroy()
+{
+
+}
+
+uint32_t
+msgbuf_get_bufsize()
+{
+  return g_BUFSIZE;
+}
+
+void
+msgbuf_set_bufsize(const uint32_t size_in_pages_)
+{
+  g_BUFSIZE = (size_in_pages_ * g_PAGESIZE);
+}
+
+static
+void*
+page_aligned_malloc(const uint64_t size_)
+{
+  int rv;
+  void *buf = NULL;
+
+  rv = posix_memalign(&buf,g_PAGESIZE,size_);
+  if(rv != 0)
+    return NULL;
+
+  return buf;
+}
+
+fuse_msgbuf_t*
+msgbuf_alloc()
+{
+  fuse_msgbuf_t *msgbuf;
+  std::lock_guard<std::mutex> lck(g_MUTEX);
+
+  if(g_MSGBUF_STACK.empty())
+    {
+      msgbuf = (fuse_msgbuf_t*)malloc(sizeof(fuse_msgbuf_t));
+      if(msgbuf == NULL)
+        return NULL;
+
+      msgbuf->mem = (char*)page_aligned_malloc(g_BUFSIZE);
+      if(msgbuf->mem == NULL)
+        {
+          free(msgbuf);
+          return NULL;
+        }
+
+      msgbuf->size = g_BUFSIZE;
+
+      g_MSGBUF_ALLOCED.emplace(msgbuf);
+    }
+  else
+    {
+      msgbuf = g_MSGBUF_STACK.back();
+      g_MSGBUF_STACK.pop_back();
+    }
+
+  return msgbuf;
+}
+
+void
+msgbuf_free(fuse_msgbuf_t *msgbuf_)
+{
+  std::lock_guard<std::mutex> lck(g_MUTEX);
+
+  if(msgbuf_->size != g_BUFSIZE)
+    {
+      g_MSGBUF_ALLOCED.erase(msgbuf_);
+      free(msgbuf_->mem);
+      free(msgbuf_);
+      return;
+    }
+
+  g_MSGBUF_STACK.emplace_back(msgbuf_);
+}
+
+uint64_t
+msgbuf_alloc_count()
+{
+  return g_MSGBUF_ALLOCED.size();
+}
+
+uint64_t
+msgbuf_avail_count()
+{
+  return g_MSGBUF_STACK.size();
+}
+
+void
+msgbuf_gc()
+{
+  std::vector<fuse_msgbuf_t*> oldstack;
+
+  {
+    std::lock_guard<std::mutex> lck(g_MUTEX);
+    oldstack.swap(g_MSGBUF_STACK);
+  }
+
+  fprintf(stderr,"freeing %lu msgbufs\n",oldstack.size());
+  for(auto msgbuf: oldstack)
+    {
+      g_MSGBUF_ALLOCED.erase(msgbuf);
+      free(msgbuf->mem);
+      free(msgbuf);
+    }
+}

libfuse/lib/fuse_msgbuf.hpp

@@ -0,0 +1,37 @@
+/*
+  ISC License
+
+  Copyright (c) 2022, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "fuse_msgbuf.h"
+#include "extern_c.h"
+
+EXTERN_C_BEGIN
+
+void     msgbuf_set_bufsize(const uint32_t size);
+uint32_t msgbuf_get_bufsize();
+
+fuse_msgbuf_t* msgbuf_alloc();
+void           msgbuf_free(fuse_msgbuf_t *msgbuf);
+
+void           msgbuf_gc();
+
+uint64_t       msgbuf_alloc_count();
+uint64_t       msgbuf_avail_count();
+
+EXTERN_C_END

libfuse/lib/fuse_mt.c

@@ -16,109 +16,22 @@
 #include <pthread.h>
 #include <assert.h>
 
-struct procdata {
-	struct fuse *f;
-	struct fuse_chan *prevch;
-	struct fuse_session *prevse;
-	fuse_processor_t proc;
-	void *data;
-};
-
-static void mt_session_proc(void *data, const char *buf, size_t len,
-			    struct fuse_chan *ch)
+int
+fuse_loop_mt(struct fuse *f)
 {
-	struct procdata *pd = (struct procdata *) data;
-	struct fuse_cmd *cmd = *(struct fuse_cmd **) buf;
+  if (f == NULL)
+    return -1;
 
-	(void) len;
-	(void) ch;
-	pd->proc(pd->f, cmd, pd->data);
+  int res = fuse_start_maintenance_thread(f);
+  if (res)
+    return -1;
+
+  res = fuse_session_loop_mt(fuse_get_session(f),
+                             fuse_config_read_thread_count(f),
+                             fuse_config_process_thread_count(f),
+                             fuse_config_pin_threads(f));
+
+  fuse_stop_maintenance_thread(f);
+
+  return res;
 }
-
-static void mt_session_exit(void *data, int val)
-{
-	struct procdata *pd = (struct procdata *) data;
-	if (val)
-		fuse_session_exit(pd->prevse);
-	else
-		fuse_session_reset(pd->prevse);
-}
-
-static int mt_session_exited(void *data)
-{
-	struct procdata *pd = (struct procdata *) data;
-	return fuse_session_exited(pd->prevse);
-}
-
-static int mt_chan_receive(struct fuse_chan **chp, char *buf, size_t size)
-{
-	struct fuse_cmd *cmd;
-	struct procdata *pd = (struct procdata *) fuse_chan_data(*chp);
-
-	assert(size >= sizeof(cmd));
-
-	cmd = fuse_read_cmd(pd->f);
-	if (cmd == NULL)
-		return 0;
-
-	*(struct fuse_cmd **) buf = cmd;
-
-	return sizeof(cmd);
-}
-
-int fuse_loop_mt_proc(struct fuse *f, fuse_processor_t proc, void *data)
-{
-	int res;
-	struct procdata pd;
-	struct fuse_session *prevse = fuse_get_session(f);
-	struct fuse_session *se;
-	struct fuse_chan *prevch = fuse_session_next_chan(prevse, NULL);
-	struct fuse_chan *ch;
-	struct fuse_session_ops sop = {
-		.exit = mt_session_exit,
-		.exited = mt_session_exited,
-		.process = mt_session_proc,
-	};
-	struct fuse_chan_ops cop = {
-		.receive = mt_chan_receive,
-	};
-
-	pd.f = f;
-	pd.prevch = prevch;
-	pd.prevse = prevse;
-	pd.proc = proc;
-	pd.data = data;
-
-	se = fuse_session_new(&sop, &pd);
-	if (se == NULL)
-		return -1;
-
-	ch = fuse_chan_new(&cop, fuse_chan_fd(prevch),
-			   sizeof(struct fuse_cmd *), &pd);
-	if (ch == NULL) {
-		fuse_session_destroy(se);
-		return -1;
-	}
-	fuse_session_add_chan(se, ch);
-	res = fuse_session_loop_mt(se,
-                                   fuse_config_num_threads(f));
-	fuse_session_destroy(se);
-	return res;
-}
-
-int fuse_loop_mt(struct fuse *f)
-{
-	if (f == NULL)
-		return -1;
-
-	int res = fuse_start_cleanup_thread(f);
-	if (res)
-		return -1;
-
-	res = fuse_session_loop_mt(fuse_get_session(f),
-                                   fuse_config_num_threads(f));
-	fuse_stop_cleanup_thread(f);
-	return res;
-}
-
-FUSE_SYMVER(".symver fuse_loop_mt_proc,__fuse_loop_mt@");

libfuse/lib/fuse_node.c

@@ -0,0 +1,224 @@
+#include "fuse_node.h"
+
+#include "khash.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include <stdio.h> // for debugging
+
+#define UNKNOWN_INO    UINT64_MAX
+#define ROOT_NODE_ID   0
+#define ROOT_NODE_NAME "/"
+
+typedef struct node_idname_t node_idname_t;
+struct node_idname_t
+{
+  uint64_t    id;
+  const char *name;
+};
+
+static khint_t idname_hash_func(const node_idname_t idname);
+static int     idname_hash_equal(const node_idname_t idname0, const node_idname_t idname1);
+
+KHASH_INIT(node,node_idname_t,fuse_node_t*,1,idname_hash_func,idname_hash_equal);
+
+typedef struct fuse_node_hashtable_t fuse_node_hashtable_t;
+struct fuse_node_hashtable_t
+{
+  kh_node_t *ht;
+  uint64_t   id;
+  uint64_t   generation;
+};
+
+static
+inline
+khint_t
+idname_hash_func(const node_idname_t idname_)
+{
+  if(idname_.name == NULL)
+    return idname_.id;
+  return (idname_.id ^ kh_str_hash_func(idname_.name));
+}
+
+static
+inline
+int
+idname_hash_equal(const node_idname_t idname0_,
+                  const node_idname_t idname1_)
+{
+  return ((idname0_.id == idname1_.id) &&
+          ((idname0_.name == idname1_.name) ||
+           (strcmp(idname0_.name,idname1_.name) == 0)));
+}
+
+static
+inline
+fuse_node_t*
+fuse_node_alloc(const uint64_t  id_,
+                const char     *name_)
+{
+  fuse_node_t *node;
+
+  node = (fuse_node_t*)calloc(1,sizeof(fuse_node_t));
+
+  node->id           = id_;
+  node->name         = strdup(name_);
+  node->ref_count    = 1;
+  node->lookup_count = 1;
+
+  return node;
+}
+
+static
+inline
+void
+fuse_node_free(fuse_node_t *node_)
+{
+  free(node_->name);
+  free(node_);
+}
+
+static
+inline
+uint64_t
+rand64()
+{
+  uint64_t rv;
+
+  rv   = rand();
+  rv <<= 32;
+  rv  |= rand();
+
+  return rv;
+}
+
+static
+inline
+void
+node_hashtable_gen_unique_id(fuse_node_hashtable_t *ht_)
+{
+  do
+    {
+      ht_->id++;
+      if(ht_->id == 0)
+        ht_->generation++;
+    }
+  while((ht_->id == 0) || (ht_->id == UNKNOWN_INO));
+}
+
+static
+inline
+void
+node_hashtable_put_root(fuse_node_hashtable_t *ht_)
+{
+  int rv;
+  khint_t k;
+  fuse_node_t *root_node;
+  const node_idname_t idname0 = {ROOT_NODE_ID,""};
+  const node_idname_t idname1 = {ROOT_NODE_ID,ROOT_NODE_NAME};
+
+  root_node = fuse_node_alloc(ROOT_NODE_ID,ROOT_NODE_NAME);
+
+  k = kh_put_node(ht_->ht,idname0,&rv);
+  kh_value(ht_->ht,k) = root_node;
+
+  k = kh_put_node(ht_->ht,idname1,&rv);
+  kh_value(ht_->ht,k) = root_node;
+}
+
+static
+inline
+void
+node_hashtable_set_id_gen(fuse_node_hashtable_t *ht_,
+                          fuse_node_t           *node_)
+{
+  node_hashtable_gen_unique_id(ht_);
+  node_->id         = ht_->id;
+  node_->generation = ht_->generation;
+}
+
+fuse_node_hashtable_t*
+fuse_node_hashtable_init()
+{
+  fuse_node_hashtable_t *ht;
+
+  ht = (fuse_node_hashtable_t*)calloc(sizeof(fuse_node_hashtable_t),1);
+  if(ht == NULL)
+    return NULL;
+
+  ht->ht = kh_init_node();
+  if(ht->ht == NULL)
+    {
+      free(ht);
+      return NULL;
+    }
+
+  srand(time(NULL));
+  ht->id         = 0;
+  ht->generation = rand64();
+
+  node_hashtable_put_root(ht);
+
+  return ht;
+}
+
+fuse_node_t*
+fuse_node_hashtable_put(fuse_node_hashtable_t *ht_,
+                        const uint64_t         parent_id_,
+                        const uint64_t         child_id_,
+                        const char            *child_name_)
+{
+  int rv;
+  khint_t k;
+  fuse_node_t *child_node;
+  const node_idname_t p_idname  = {parent_id_,""};
+  const node_idname_t c0_idname = {child_id_,child_name_};
+  const node_idname_t c1_idname = {parent_id_,child_name_};
+
+  child_node = fuse_node_alloc(child_id_,child_name_);
+
+  k = kh_get_node(ht_->ht,p_idname);
+  child_node->parent = kh_value(ht_->ht,k);
+  child_node->parent->ref_count++;
+
+  k = kh_put_node(ht_->ht,c0_idname,&rv);
+  kh_value(ht_->ht,k) = child_node;
+
+  k = kh_put_node(ht_->ht,c1_idname,&rv);
+  kh_value(ht_->ht,k) = child_node;
+
+  return child_node;
+}
+
+fuse_node_t*
+fuse_node_hashtable_get(fuse_node_hashtable_t *ht_,
+                        const uint64_t         id_)
+{
+  return fuse_node_hashtable_get_child(ht_,id_,"");
+}
+
+fuse_node_t*
+fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht_,
+                              const uint64_t         parent_id_,
+                              const char            *child_name_)
+{
+  khint_t k;
+  fuse_node_t *node;
+  const node_idname_t idname = {parent_id_,child_name_};
+
+  k = kh_get_node(ht_->ht,idname);
+  node = ((k != kh_end(ht_->ht)) ?
+          kh_value(ht_->ht,k) :
+          NULL);
+
+  return node;
+}
+
+void
+fuse_node_hashtable_del(fuse_node_hashtable_t *ht_,
+                        fuse_node_t           *node_)
+{
+
+}

libfuse/lib/fuse_node.h

@@ -0,0 +1,36 @@
+#include <stdint.h>
+
+typedef struct fuse_node_t fuse_node_t;
+struct fuse_node_t
+{
+  uint64_t     id;
+  uint64_t     generation;  
+  char        *name;
+  fuse_node_t *parent;
+  uint32_t     ref_count;
+  uint64_t     lookup_count;
+  uint64_t     open_count;
+};
+
+struct fuse_node_hashtable_t;
+typedef struct fuse_node_hashtable_t fuse_node_hashtable_t;
+
+
+fuse_node_hashtable_t *fuse_node_hashtable_init();
+
+fuse_node_t *fuse_node_hashtable_put(fuse_node_hashtable_t *ht,
+                                     const uint64_t         parent_id,
+                                     const uint64_t         child_id,
+                                     const char            *child_name);
+
+fuse_node_t* fuse_node_hashtable_get(fuse_node_hashtable_t *ht,
+                                     const uint64_t         id);
+fuse_node_t* fuse_node_hashtable_get_child(fuse_node_hashtable_t *ht,
+                                           const uint64_t         id,
+                                           const char            *name);
+void fuse_node_hashtable_del(fuse_node_hashtable_t *ht,
+                             fuse_node_t           *node);
+
+void fuse_node_hashtable_get_path(fuse_node_hashtable_t *ht,
+                                  char                  *buf,
+                                  uint32_t               buflen);

libfuse/lib/fuse_opt.c

@@ -14,413 +14,408 @@
 #include <string.h>
 #include <assert.h>
 
-struct fuse_opt_context {
-	void *data;
-	const struct fuse_opt *opt;
-	fuse_opt_proc_t proc;
-	int argctr;
-	int argc;
-	char **argv;
-	struct fuse_args outargs;
-	char *opts;
-	int nonopt;
+struct fuse_opt_context
+{
+  void *data;
+  const struct fuse_opt *opt;
+  fuse_opt_proc_t proc;
+  int argctr;
+  int argc;
+  char **argv;
+  struct fuse_args outargs;
+  char *opts;
+  int nonopt;
 };
 
-void fuse_opt_free_args(struct fuse_args *args)
+void
+fuse_opt_free_args(struct fuse_args *args)
 {
-	if (args) {
-		if (args->argv && args->allocated) {
-			int i;
-			for (i = 0; i < args->argc; i++)
-				free(args->argv[i]);
-			free(args->argv);
-		}
-		args->argc = 0;
-		args->argv = NULL;
-		args->allocated = 0;
-	}
+  if (args) {
+    if (args->argv && args->allocated) {
+      int i;
+      for (i = 0; i < args->argc; i++)
+        free(args->argv[i]);
+      free(args->argv);
+    }
+    args->argc = 0;
+    args->argv = NULL;
+    args->allocated = 0;
+  }
 }
 
-static int alloc_failed(void)
+static
+int
+alloc_failed(void)
 {
-	fprintf(stderr, "fuse: memory allocation failed\n");
-	return -1;
+  fprintf(stderr, "fuse: memory allocation failed\n");
+  return -1;
 }
 
-int fuse_opt_add_arg(struct fuse_args *args, const char *arg)
+int
+fuse_opt_add_arg(struct fuse_args *args, const char *arg)
 {
-	char **newargv;
-	char *newarg;
+  char **newargv;
+  char *newarg;
 
-	assert(!args->argv || args->allocated);
+  assert(!args->argv || args->allocated);
 
-	newarg = strdup(arg);
-	if (!newarg)
-		return alloc_failed();
+  newarg = strdup(arg);
+  if (!newarg)
+    return alloc_failed();
 
-	newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *));
-	if (!newargv) {
-		free(newarg);
-		return alloc_failed();
-	}
+  newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *));
+  if (!newargv) {
+    free(newarg);
+    return alloc_failed();
+  }
 
-	args->argv = newargv;
-	args->allocated = 1;
-	args->argv[args->argc++] = newarg;
-	args->argv[args->argc] = NULL;
-	return 0;
+  args->argv = newargv;
+  args->allocated = 1;
+  args->argv[args->argc++] = newarg;
+  args->argv[args->argc] = NULL;
+  return 0;
 }
 
 static int fuse_opt_insert_arg_common(struct fuse_args *args, int pos,
 				      const char *arg)
 {
-	assert(pos <= args->argc);
-	if (fuse_opt_add_arg(args, arg) == -1)
-		return -1;
+  assert(pos <= args->argc);
+  if (fuse_opt_add_arg(args, arg) == -1)
+    return -1;
 
-	if (pos != args->argc - 1) {
-		char *newarg = args->argv[args->argc - 1];
-		memmove(&args->argv[pos + 1], &args->argv[pos],
-			sizeof(char *) * (args->argc - pos - 1));
-		args->argv[pos] = newarg;
-	}
-	return 0;
+  if (pos != args->argc - 1) {
+    char *newarg = args->argv[args->argc - 1];
+    memmove(&args->argv[pos + 1], &args->argv[pos],
+            sizeof(char *) * (args->argc - pos - 1));
+    args->argv[pos] = newarg;
+  }
+  return 0;
 }
 
 int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg)
 {
-	return fuse_opt_insert_arg_common(args, pos, arg);
-}
-
-int fuse_opt_insert_arg_compat(struct fuse_args *args, int pos,
-			       const char *arg);
-int fuse_opt_insert_arg_compat(struct fuse_args *args, int pos, const char *arg)
-{
-	return fuse_opt_insert_arg_common(args, pos, arg);
+  return fuse_opt_insert_arg_common(args, pos, arg);
 }
 
 static int next_arg(struct fuse_opt_context *ctx, const char *opt)
 {
-	if (ctx->argctr + 1 >= ctx->argc) {
-		fprintf(stderr, "fuse: missing argument after `%s'\n", opt);
-		return -1;
-	}
-	ctx->argctr++;
-	return 0;
+  if (ctx->argctr + 1 >= ctx->argc) {
+    fprintf(stderr, "fuse: missing argument after `%s'\n", opt);
+    return -1;
+  }
+  ctx->argctr++;
+  return 0;
 }
 
 static int add_arg(struct fuse_opt_context *ctx, const char *arg)
 {
-	return fuse_opt_add_arg(&ctx->outargs, arg);
+  return fuse_opt_add_arg(&ctx->outargs, arg);
 }
 
 static int add_opt_common(char **opts, const char *opt, int esc)
 {
-	unsigned oldlen = *opts ? strlen(*opts) : 0;
-	char *d = realloc(*opts, oldlen + 1 + strlen(opt) * 2 + 1);
+  unsigned oldlen = *opts ? strlen(*opts) : 0;
+  char *d = realloc(*opts, oldlen + 1 + strlen(opt) * 2 + 1);
 
-	if (!d)
-		return alloc_failed();
+  if (!d)
+    return alloc_failed();
 
-	*opts = d;
-	if (oldlen) {
-		d += oldlen;
-		*d++ = ',';
-	}
+  *opts = d;
+  if (oldlen) {
+    d += oldlen;
+    *d++ = ',';
+  }
 
-	for (; *opt; opt++) {
-		if (esc && (*opt == ',' || *opt == '\\'))
-			*d++ = '\\';
-		*d++ = *opt;
-	}
-	*d = '\0';
+  for (; *opt; opt++) {
+    if (esc && (*opt == ',' || *opt == '\\'))
+      *d++ = '\\';
+    *d++ = *opt;
+  }
+  *d = '\0';
 
-	return 0;
+  return 0;
 }
 
 int fuse_opt_add_opt(char **opts, const char *opt)
 {
-	return add_opt_common(opts, opt, 0);
+  return add_opt_common(opts, opt, 0);
 }
 
 int fuse_opt_add_opt_escaped(char **opts, const char *opt)
 {
-	return add_opt_common(opts, opt, 1);
+  return add_opt_common(opts, opt, 1);
 }
 
 static int add_opt(struct fuse_opt_context *ctx, const char *opt)
 {
-	return add_opt_common(&ctx->opts, opt, 1);
+  return add_opt_common(&ctx->opts, opt, 1);
 }
 
 static int call_proc(struct fuse_opt_context *ctx, const char *arg, int key,
 		     int iso)
 {
-	if (key == FUSE_OPT_KEY_DISCARD)
-		return 0;
+  if (key == FUSE_OPT_KEY_DISCARD)
+    return 0;
 
-	if (key != FUSE_OPT_KEY_KEEP && ctx->proc) {
-		int res = ctx->proc(ctx->data, arg, key, &ctx->outargs);
-		if (res == -1 || !res)
-			return res;
-	}
-	if (iso)
-		return add_opt(ctx, arg);
-	else
-		return add_arg(ctx, arg);
+  if (key != FUSE_OPT_KEY_KEEP && ctx->proc) {
+    int res = ctx->proc(ctx->data, arg, key, &ctx->outargs);
+    if (res == -1 || !res)
+      return res;
+  }
+  if (iso)
+    return add_opt(ctx, arg);
+  else
+    return add_arg(ctx, arg);
 }
 
 static int match_template(const char *t, const char *arg, unsigned *sepp)
 {
-	int arglen = strlen(arg);
-	const char *sep = strchr(t, '=');
-	sep = sep ? sep : strchr(t, ' ');
-	if (sep && (!sep[1] || sep[1] == '%')) {
-		int tlen = sep - t;
-		if (sep[0] == '=')
-			tlen ++;
-		if (arglen >= tlen && strncmp(arg, t, tlen) == 0) {
-			*sepp = sep - t;
-			return 1;
-		}
-	}
-	if (strcmp(t, arg) == 0) {
-		*sepp = 0;
-		return 1;
-	}
-	return 0;
+  int arglen = strlen(arg);
+  const char *sep = strchr(t, '=');
+  sep = sep ? sep : strchr(t, ' ');
+  if (sep && (!sep[1] || sep[1] == '%')) {
+    int tlen = sep - t;
+    if (sep[0] == '=')
+      tlen ++;
+    if (arglen >= tlen && strncmp(arg, t, tlen) == 0) {
+      *sepp = sep - t;
+      return 1;
+    }
+  }
+  if (strcmp(t, arg) == 0) {
+    *sepp = 0;
+    return 1;
+  }
+  return 0;
 }
 
 static const struct fuse_opt *find_opt(const struct fuse_opt *opt,
 				       const char *arg, unsigned *sepp)
 {
-	for (; opt && opt->templ; opt++)
-		if (match_template(opt->templ, arg, sepp))
-			return opt;
-	return NULL;
+  for (; opt && opt->templ; opt++)
+    if (match_template(opt->templ, arg, sepp))
+      return opt;
+  return NULL;
 }
 
 int fuse_opt_match(const struct fuse_opt *opts, const char *opt)
 {
-	unsigned dummy;
-	return find_opt(opts, opt, &dummy) ? 1 : 0;
+  unsigned dummy;
+  return find_opt(opts, opt, &dummy) ? 1 : 0;
 }
 
 static int process_opt_param(void *var, const char *format, const char *param,
 			     const char *arg)
 {
-	assert(format[0] == '%');
-	if (format[1] == 's') {
-		char *copy = strdup(param);
-		if (!copy)
-			return alloc_failed();
+  assert(format[0] == '%');
+  if (format[1] == 's') {
+    char *copy = strdup(param);
+    if (!copy)
+      return alloc_failed();
 
-		*(char **) var = copy;
-	} else {
-		if (sscanf(param, format, var) != 1) {
-			fprintf(stderr, "fuse: invalid parameter in option `%s'\n", arg);
-			return -1;
-		}
-	}
-	return 0;
+    *(char **) var = copy;
+  } else {
+    if (sscanf(param, format, var) != 1) {
+      fprintf(stderr, "fuse: invalid parameter in option `%s'\n", arg);
+      return -1;
+    }
+  }
+  return 0;
 }
 
 static int process_opt(struct fuse_opt_context *ctx,
 		       const struct fuse_opt *opt, unsigned sep,
 		       const char *arg, int iso)
 {
-	if (opt->offset == -1U) {
-		if (call_proc(ctx, arg, opt->value, iso) == -1)
-			return -1;
-	} else {
-		void *var = ctx->data + opt->offset;
-		if (sep && opt->templ[sep + 1]) {
-			const char *param = arg + sep;
-			if (opt->templ[sep] == '=')
-				param ++;
-			if (process_opt_param(var, opt->templ + sep + 1,
-					      param, arg) == -1)
-				return -1;
-		} else
-			*(int *)var = opt->value;
-	}
-	return 0;
+  if (opt->offset == -1U) {
+    if (call_proc(ctx, arg, opt->value, iso) == -1)
+      return -1;
+  } else {
+    void *var = ctx->data + opt->offset;
+    if (sep && opt->templ[sep + 1]) {
+      const char *param = arg + sep;
+      if (opt->templ[sep] == '=')
+        param ++;
+      if (process_opt_param(var, opt->templ + sep + 1,
+                            param, arg) == -1)
+        return -1;
+    } else
+      *(int *)var = opt->value;
+  }
+  return 0;
 }
 
 static int process_opt_sep_arg(struct fuse_opt_context *ctx,
 			       const struct fuse_opt *opt, unsigned sep,
 			       const char *arg, int iso)
 {
-	int res;
-	char *newarg;
-	char *param;
+  int res;
+  char *newarg;
+  char *param;
 
-	if (next_arg(ctx, arg) == -1)
-		return -1;
+  if (next_arg(ctx, arg) == -1)
+    return -1;
 
-	param = ctx->argv[ctx->argctr];
-	newarg = malloc(sep + strlen(param) + 1);
-	if (!newarg)
-		return alloc_failed();
+  param = ctx->argv[ctx->argctr];
+  newarg = malloc(sep + strlen(param) + 1);
+  if (!newarg)
+    return alloc_failed();
 
-	memcpy(newarg, arg, sep);
-	strcpy(newarg + sep, param);
-	res = process_opt(ctx, opt, sep, newarg, iso);
-	free(newarg);
+  memcpy(newarg, arg, sep);
+  strcpy(newarg + sep, param);
+  res = process_opt(ctx, opt, sep, newarg, iso);
+  free(newarg);
 
-	return res;
+  return res;
 }
 
 static int process_gopt(struct fuse_opt_context *ctx, const char *arg, int iso)
 {
-	unsigned sep;
-	const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep);
-	if (opt) {
-		for (; opt; opt = find_opt(opt + 1, arg, &sep)) {
-			int res;
-			if (sep && opt->templ[sep] == ' ' && !arg[sep])
-				res = process_opt_sep_arg(ctx, opt, sep, arg,
-							  iso);
-			else
-				res = process_opt(ctx, opt, sep, arg, iso);
-			if (res == -1)
-				return -1;
-		}
-		return 0;
-	} else
-		return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso);
+  unsigned sep;
+  const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep);
+  if (opt) {
+    for (; opt; opt = find_opt(opt + 1, arg, &sep)) {
+      int res;
+      if (sep && opt->templ[sep] == ' ' && !arg[sep])
+        res = process_opt_sep_arg(ctx, opt, sep, arg,
+                                  iso);
+      else
+        res = process_opt(ctx, opt, sep, arg, iso);
+      if (res == -1)
+        return -1;
+    }
+    return 0;
+  } else
+    return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso);
 }
 
 static int process_real_option_group(struct fuse_opt_context *ctx, char *opts)
 {
-	char *s = opts;
-	char *d = s;
-	int end = 0;
+  char *s = opts;
+  char *d = s;
+  int end = 0;
 
-	while (!end) {
-		if (*s == '\0')
-			end = 1;
-		if (*s == ',' || end) {
-			int res;
+  while (!end) {
+    if (*s == '\0')
+      end = 1;
+    if (*s == ',' || end) {
+      int res;
 
-			*d = '\0';
-			res = process_gopt(ctx, opts, 1);
-			if (res == -1)
-				return -1;
-			d = opts;
-		} else {
-			if (s[0] == '\\' && s[1] != '\0') {
-				s++;
-				if (s[0] >= '0' && s[0] <= '3' &&
-				    s[1] >= '0' && s[1] <= '7' &&
-				    s[2] >= '0' && s[2] <= '7') {
-					*d++ = (s[0] - '0') * 0100 +
-						(s[1] - '0') * 0010 +
-						(s[2] - '0');
-					s += 2;
-				} else {
-					*d++ = *s;
-				}
-			} else {
-				*d++ = *s;
-			}
-		}
-		s++;
-	}
+      *d = '\0';
+      res = process_gopt(ctx, opts, 1);
+      if (res == -1)
+        return -1;
+      d = opts;
+    } else {
+      if (s[0] == '\\' && s[1] != '\0') {
+        s++;
+        if (s[0] >= '0' && s[0] <= '3' &&
+            s[1] >= '0' && s[1] <= '7' &&
+            s[2] >= '0' && s[2] <= '7') {
+          *d++ = (s[0] - '0') * 0100 +
+            (s[1] - '0') * 0010 +
+            (s[2] - '0');
+          s += 2;
+        } else {
+          *d++ = *s;
+        }
+      } else {
+        *d++ = *s;
+      }
+    }
+    s++;
+  }
 
-	return 0;
+  return 0;
 }
 
 static int process_option_group(struct fuse_opt_context *ctx, const char *opts)
 {
-	int res;
-	char *copy = strdup(opts);
+  int res;
+  char *copy = strdup(opts);
 
-	if (!copy) {
-		fprintf(stderr, "fuse: memory allocation failed\n");
-		return -1;
-	}
-	res = process_real_option_group(ctx, copy);
-	free(copy);
-	return res;
+  if (!copy) {
+    fprintf(stderr, "fuse: memory allocation failed\n");
+    return -1;
+  }
+  res = process_real_option_group(ctx, copy);
+  free(copy);
+  return res;
 }
 
 static int process_one(struct fuse_opt_context *ctx, const char *arg)
 {
-	if (ctx->nonopt || arg[0] != '-')
-		return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0);
-	else if (arg[1] == 'o') {
-		if (arg[2])
-			return process_option_group(ctx, arg + 2);
-		else {
-			if (next_arg(ctx, arg) == -1)
-				return -1;
+  if (ctx->nonopt || arg[0] != '-')
+    return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0);
+  else if (arg[1] == 'o') {
+    if (arg[2])
+      return process_option_group(ctx, arg + 2);
+    else {
+      if (next_arg(ctx, arg) == -1)
+        return -1;
 
-			return process_option_group(ctx,
-						    ctx->argv[ctx->argctr]);
-		}
-	} else if (arg[1] == '-' && !arg[2]) {
-		if (add_arg(ctx, arg) == -1)
-			return -1;
-		ctx->nonopt = ctx->outargs.argc;
-		return 0;
-	} else
-		return process_gopt(ctx, arg, 0);
+      return process_option_group(ctx,
+                                  ctx->argv[ctx->argctr]);
+    }
+  } else if (arg[1] == '-' && !arg[2]) {
+    if (add_arg(ctx, arg) == -1)
+      return -1;
+    ctx->nonopt = ctx->outargs.argc;
+    return 0;
+  } else
+    return process_gopt(ctx, arg, 0);
 }
 
 static int opt_parse(struct fuse_opt_context *ctx)
 {
-	if (ctx->argc) {
-		if (add_arg(ctx, ctx->argv[0]) == -1)
-			return -1;
-	}
+  if (ctx->argc) {
+    if (add_arg(ctx, ctx->argv[0]) == -1)
+      return -1;
+  }
 
-	for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++)
-		if (process_one(ctx, ctx->argv[ctx->argctr]) == -1)
-			return -1;
+  for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++)
+    if (process_one(ctx, ctx->argv[ctx->argctr]) == -1)
+      return -1;
 
-	if (ctx->opts) {
-		if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 ||
-		    fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1)
-			return -1;
-	}
+  if (ctx->opts) {
+    if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 ||
+        fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1)
+      return -1;
+  }
 
-	/* If option separator ("--") is the last argument, remove it */
-	if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc &&
-	    strcmp(ctx->outargs.argv[ctx->outargs.argc - 1], "--") == 0) {
-		free(ctx->outargs.argv[ctx->outargs.argc - 1]);
-		ctx->outargs.argv[--ctx->outargs.argc] = NULL;
-	}
+  /* If option separator ("--") is the last argument, remove it */
+  if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc &&
+      strcmp(ctx->outargs.argv[ctx->outargs.argc - 1], "--") == 0) {
+    free(ctx->outargs.argv[ctx->outargs.argc - 1]);
+    ctx->outargs.argv[--ctx->outargs.argc] = NULL;
+  }
 
-	return 0;
+  return 0;
 }
 
 int fuse_opt_parse(struct fuse_args *args, void *data,
 		   const struct fuse_opt opts[], fuse_opt_proc_t proc)
 {
-	int res;
-	struct fuse_opt_context ctx = {
-		.data = data,
-		.opt = opts,
-		.proc = proc,
-	};
+  int res;
+  struct fuse_opt_context ctx = {
+    .data = data,
+    .opt = opts,
+    .proc = proc,
+  };
 
-	if (!args || !args->argv || !args->argc)
-		return 0;
+  if (!args || !args->argv || !args->argc)
+    return 0;
 
-	ctx.argc = args->argc;
-	ctx.argv = args->argv;
+  ctx.argc = args->argc;
+  ctx.argv = args->argv;
 
-	res = opt_parse(&ctx);
-	if (res != -1) {
-		struct fuse_args tmp = *args;
-		*args = ctx.outargs;
-		ctx.outargs = tmp;
-	}
-	free(ctx.opts);
-	fuse_opt_free_args(&ctx.outargs);
-	return res;
+  res = opt_parse(&ctx);
+  if (res != -1) {
+    struct fuse_args tmp = *args;
+    *args = ctx.outargs;
+    ctx.outargs = tmp;
+  }
+  free(ctx.opts);
+  fuse_opt_free_args(&ctx.outargs);
+  return res;
 }
-
-/* This symbol version was mistakenly added to the version script */
-FUSE_SYMVER(".symver fuse_opt_insert_arg_compat,fuse_opt_insert_arg@FUSE_2.5");

libfuse/lib/fuse_session.c

@@ -8,233 +8,148 @@
 
 #include "fuse_i.h"
 #include "fuse_misc.h"
-#include "fuse_common_compat.h"
-#include "fuse_lowlevel_compat.h"
+#include "fuse_kernel.h"
 
+#include <assert.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <assert.h>
-#include <errno.h>
+#include <unistd.h>
+#include <sys/uio.h>
 
-struct fuse_chan {
-	struct fuse_chan_ops op;
 
-	struct fuse_session *se;
-
-	int fd;
-
-	size_t bufsize;
-
-	void *data;
-
-	int compat;
+struct fuse_chan
+{
+  struct fuse_session *se;
+  int fd;
+  size_t bufsize;
 };
 
-struct fuse_session *fuse_session_new(struct fuse_session_ops *op, void *data)
+struct fuse_session *
+fuse_session_new(void *data,
+                 void *receive_buf,
+                 void *process_buf,
+                 void *destroy)
 {
-	struct fuse_session *se = (struct fuse_session *) malloc(sizeof(*se));
-	if (se == NULL) {
-		fprintf(stderr, "fuse: failed to allocate session\n");
-		return NULL;
-	}
+  struct fuse_session *se = (struct fuse_session *) malloc(sizeof(*se));
+  if (se == NULL) {
+    fprintf(stderr, "fuse: failed to allocate session\n");
+    return NULL;
+  }
 
-	memset(se, 0, sizeof(*se));
-	se->op = *op;
-	se->data = data;
+  memset(se, 0, sizeof(*se));
+  se->f           = data;
+  se->receive_buf = receive_buf;
+  se->process_buf = process_buf;
+  se->destroy     = destroy;
 
-	return se;
+  return se;
 }
 
 void fuse_session_add_chan(struct fuse_session *se, struct fuse_chan *ch)
 {
-	assert(se->ch == NULL);
-	assert(ch->se == NULL);
-	se->ch = ch;
-	ch->se = se;
+  assert(se->ch == NULL);
+  assert(ch->se == NULL);
+  se->ch = ch;
+  ch->se = se;
 }
 
 void fuse_session_remove_chan(struct fuse_chan *ch)
 {
-	struct fuse_session *se = ch->se;
-	if (se) {
-		assert(se->ch == ch);
-		se->ch = NULL;
-		ch->se = NULL;
-	}
+  struct fuse_session *se = ch->se;
+  if (se) {
+    assert(se->ch == ch);
+    se->ch = NULL;
+    ch->se = NULL;
+  }
 }
 
-struct fuse_chan *fuse_session_next_chan(struct fuse_session *se,
-					 struct fuse_chan *ch)
+void
+fuse_session_destroy(struct fuse_session *se)
 {
-	assert(ch == NULL || ch == se->ch);
-	if (ch == NULL)
-		return se->ch;
-	else
-		return NULL;
-}
-
-void fuse_session_process(struct fuse_session *se, const char *buf, size_t len,
-			  struct fuse_chan *ch)
-{
-	se->op.process(se->data, buf, len, ch);
-}
-
-void fuse_session_process_buf(struct fuse_session *se,
-			      const struct fuse_buf *buf, struct fuse_chan *ch)
-{
-	if (se->process_buf) {
-		se->process_buf(se->data, buf, ch);
-	} else {
-		assert(!(buf->flags & FUSE_BUF_IS_FD));
-		fuse_session_process(se->data, buf->mem, buf->size, ch);
-	}
-}
-
-int fuse_session_receive_buf(struct fuse_session *se, struct fuse_buf *buf,
-			     struct fuse_chan **chp)
-{
-	int res;
-
-	if (se->receive_buf) {
-		res = se->receive_buf(se, buf, chp);
-	} else {
-		res = fuse_chan_recv(chp, buf->mem, buf->size);
-		if (res > 0)
-			buf->size = res;
-	}
-
-	return res;
-}
-
-
-void fuse_session_destroy(struct fuse_session *se)
-{
-	if (se->op.destroy)
-		se->op.destroy(se->data);
-	if (se->ch != NULL)
-		fuse_chan_destroy(se->ch);
-	free(se);
-}
-
-void fuse_session_exit(struct fuse_session *se)
-{
-	if (se->op.exit)
-		se->op.exit(se->data, 1);
-	se->exited = 1;
+  se->destroy(se->f);
+  if(se->ch != NULL)
+    fuse_chan_destroy(se->ch);
+  free(se);
 }
 
 void fuse_session_reset(struct fuse_session *se)
 {
-	if (se->op.exit)
-		se->op.exit(se->data, 0);
-	se->exited = 0;
+  se->exited = 0;
 }
 
-int fuse_session_exited(struct fuse_session *se)
+int
+fuse_session_exited(struct fuse_session *se)
 {
-	if (se->op.exited)
-		return se->op.exited(se->data);
-	else
-		return se->exited;
+  return se->exited;
 }
 
-void *fuse_session_data(struct fuse_session *se)
+void
+fuse_session_exit(struct fuse_session *se_)
 {
-	return se->data;
+  se_->exited = 1;
 }
 
-static struct fuse_chan *fuse_chan_new_common(struct fuse_chan_ops *op, int fd,
-					      size_t bufsize, void *data,
-					      int compat)
+void*
+fuse_session_data(struct fuse_session *se)
 {
-	struct fuse_chan *ch = (struct fuse_chan *) malloc(sizeof(*ch));
-	if (ch == NULL) {
-		fprintf(stderr, "fuse: failed to allocate channel\n");
-		return NULL;
-	}
-
-	memset(ch, 0, sizeof(*ch));
-	ch->op = *op;
-	ch->fd = fd;
-	ch->bufsize = bufsize;
-	ch->data = data;
-	ch->compat = compat;
-
-	return ch;
+  return se->f;
 }
 
-struct fuse_chan *fuse_chan_new(struct fuse_chan_ops *op, int fd,
-				size_t bufsize, void *data)
+struct fuse_chan *
+fuse_chan_new(int fd,
+              size_t bufsize)
 {
-	return fuse_chan_new_common(op, fd, bufsize, data, 0);
-}
+  struct fuse_chan *ch;
 
-struct fuse_chan *fuse_chan_new_compat24(struct fuse_chan_ops_compat24 *op,
-					 int fd, size_t bufsize, void *data)
-{
-	return fuse_chan_new_common((struct fuse_chan_ops *) op, fd, bufsize,
-				    data, 24);
+  ch = (struct fuse_chan*)malloc(sizeof(*ch));
+  if(ch == NULL)
+    {
+      fprintf(stderr, "fuse: failed to allocate channel\n");
+      return NULL;
+    }
+
+  memset(ch, 0, sizeof(*ch));
+
+  ch->fd = fd;
+  ch->bufsize = bufsize;
+
+  return ch;
 }
 
 int fuse_chan_fd(struct fuse_chan *ch)
 {
-	return ch->fd;
+  return ch->fd;
 }
 
 int fuse_chan_clearfd(struct fuse_chan *ch)
 {
-       int fd = ch->fd;
-       ch->fd = -1;
-       return fd;
+  int fd = ch->fd;
+  ch->fd = -1;
+  return fd;
 }
 
 size_t fuse_chan_bufsize(struct fuse_chan *ch)
 {
-	return ch->bufsize;
-}
-
-void *fuse_chan_data(struct fuse_chan *ch)
-{
-	return ch->data;
+  return ch->bufsize;
 }
 
 struct fuse_session *fuse_chan_session(struct fuse_chan *ch)
 {
-	return ch->se;
+  return ch->se;
 }
 
-int fuse_chan_recv(struct fuse_chan **chp, char *buf, size_t size)
+void
+fuse_chan_destroy(struct fuse_chan *ch)
 {
-	struct fuse_chan *ch = *chp;
-	if (ch->compat)
-		return ((struct fuse_chan_ops_compat24 *) &ch->op)
-			->receive(ch, buf, size);
-	else
-		return ch->op.receive(chp, buf, size);
+  int fd;
+
+  fuse_session_remove_chan(ch);
+
+  fd = fuse_chan_fd(ch);
+  if(fd != -1)
+    close(fd);
+
+  free(ch);
 }
-
-int fuse_chan_receive(struct fuse_chan *ch, char *buf, size_t size)
-{
-	int res;
-
-	res = fuse_chan_recv(&ch, buf, size);
-	return res >= 0 ? res : (res != -EINTR && res != -EAGAIN) ? -1 : 0;
-}
-
-int fuse_chan_send(struct fuse_chan *ch, const struct iovec iov[], size_t count)
-{
-	return ch->op.send(ch, iov, count);
-}
-
-void fuse_chan_destroy(struct fuse_chan *ch)
-{
-	fuse_session_remove_chan(ch);
-	if (ch->op.destroy)
-		ch->op.destroy(ch);
-	free(ch);
-}
-
-#ifndef __FreeBSD__
-FUSE_SYMVER(".symver fuse_chan_new_compat24,fuse_chan_new@FUSE_2.4");
-#endif

libfuse/lib/fuse_signals.c

@@ -16,57 +16,56 @@ static struct fuse_session *fuse_instance;
 
 static void exit_handler(int sig)
 {
-	(void) sig;
-	if (fuse_instance)
-		fuse_session_exit(fuse_instance);
+  (void) sig;
+  if (fuse_instance)
+    fuse_session_exit(fuse_instance);
 }
 
 static int set_one_signal_handler(int sig, void (*handler)(int), int remove)
 {
-	struct sigaction sa;
-	struct sigaction old_sa;
+  struct sigaction sa;
+  struct sigaction old_sa;
 
-	memset(&sa, 0, sizeof(struct sigaction));
-	sa.sa_handler = remove ? SIG_DFL : handler;
-	sigemptyset(&(sa.sa_mask));
-	sa.sa_flags = 0;
+  memset(&sa, 0, sizeof(struct sigaction));
+  sa.sa_handler = remove ? SIG_DFL : handler;
+  sigemptyset(&(sa.sa_mask));
+  sa.sa_flags = 0;
 
-	if (sigaction(sig, NULL, &old_sa) == -1) {
-		perror("fuse: cannot get old signal handler");
-		return -1;
-	}
+  if (sigaction(sig, NULL, &old_sa) == -1) {
+    perror("fuse: cannot get old signal handler");
+    return -1;
+  }
 
-	if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
-	    sigaction(sig, &sa, NULL) == -1) {
-		perror("fuse: cannot set signal handler");
-		return -1;
-	}
-	return 0;
+  if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
+      sigaction(sig, &sa, NULL) == -1) {
+    perror("fuse: cannot set signal handler");
+    return -1;
+  }
+  return 0;
 }
 
 int fuse_set_signal_handlers(struct fuse_session *se)
 {
-	if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
-	    set_one_signal_handler(SIGPIPE, SIG_IGN, 0) == -1)
-		return -1;
+  if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
+      set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
+      set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
+      set_one_signal_handler(SIGPIPE, SIG_IGN, 0) == -1)
+    return -1;
 
-	fuse_instance = se;
-	return 0;
+  fuse_instance = se;
+  return 0;
 }
 
 void fuse_remove_signal_handlers(struct fuse_session *se)
 {
-	if (fuse_instance != se)
-		fprintf(stderr,
-			"fuse: fuse_remove_signal_handlers: unknown session\n");
-	else
-		fuse_instance = NULL;
+  if (fuse_instance != se)
+    fprintf(stderr,
+            "fuse: fuse_remove_signal_handlers: unknown session\n");
+  else
+    fuse_instance = NULL;
 
-	set_one_signal_handler(SIGHUP, exit_handler, 1);
-	set_one_signal_handler(SIGINT, exit_handler, 1);
-	set_one_signal_handler(SIGTERM, exit_handler, 1);
-	set_one_signal_handler(SIGPIPE, SIG_IGN, 1);
+  set_one_signal_handler(SIGHUP, exit_handler, 1);
+  set_one_signal_handler(SIGINT, exit_handler, 1);
+  set_one_signal_handler(SIGTERM, exit_handler, 1);
+  set_one_signal_handler(SIGPIPE, SIG_IGN, 1);
 }
-

libfuse/lib/fuse_versionscript

@@ -1,207 +0,0 @@
-FUSE_2.2 {
-	global:
-		fuse_destroy;
-		fuse_exit;
-		fuse_exited;
-		fuse_invalidate;
-		fuse_is_lib_option;
-		fuse_loop;
-		fuse_loop_mt;
-		fuse_loop_mt_proc;
-		fuse_main;
-		fuse_main_compat1;
-		fuse_main_compat2;
-		fuse_mount_compat1;
-		fuse_new_compat1;
-		fuse_new_compat2;
-		fuse_process_cmd;
-		fuse_read_cmd;
-		fuse_set_getcontext_func;
-		fuse_setup_compat2;
-};
-
-FUSE_2.4 {
-	global:
-		fuse_add_dirent;
-		fuse_chan_bufsize;
-		fuse_chan_data;
-		fuse_chan_destroy;
-		fuse_chan_fd;
-		fuse_chan_receive;
-		fuse_chan_send;
-		fuse_chan_session;
-		fuse_dirent_size;
-		fuse_kern_chan_new;
-		fuse_lowlevel_is_lib_option;
-		fuse_reply_attr;
-		fuse_reply_buf;
-		fuse_reply_entry;
-		fuse_reply_err;
-		fuse_reply_none;
-		fuse_reply_readlink;
-		fuse_reply_write;
-		fuse_reply_xattr;
-		fuse_req_userdata;
-		fuse_session_add_chan;
-		fuse_session_destroy;
-		fuse_session_exit;
-		fuse_session_exited;
-		fuse_session_loop;
-		fuse_session_loop_mt;
-		fuse_session_new;
-		fuse_session_next_chan;
-		fuse_session_process;
-		fuse_session_reset;
-} FUSE_2.2;
-
-FUSE_2.5 {
-	global:
-		fuse_lowlevel_new_compat;
-		fuse_main_real_compat22;
-		fuse_mount_compat22;
-		fuse_new_compat22;
-		fuse_opt_parse;
-		fuse_opt_add_opt;
-		fuse_opt_add_arg;
-		fuse_opt_free_args;
-		fuse_opt_match;
-		fuse_parse_cmdline;
-		fuse_remove_signal_handlers;
-		fuse_reply_create;
-		fuse_reply_open;
-		fuse_reply_open_compat;
-		fuse_reply_statfs;
-		fuse_reply_statfs_compat;
-		fuse_setup_compat22;
-		fuse_set_signal_handlers;
-} FUSE_2.4;
-
-FUSE_2.6 {
-	global:
-		fuse_add_direntry;
-		fuse_chan_new;
-		fuse_chan_new_compat24;
-		fuse_chan_recv;
-		fuse_daemonize;
-		fuse_get_session;
-		fuse_interrupted;
-		fuse_lowlevel_new;
-		fuse_lowlevel_new_compat25;
-		fuse_main_real;
-		fuse_main_real_compat25;
-		fuse_mount;
-		fuse_mount_compat25;
-		fuse_new;
-		fuse_new_compat25;
-		fuse_opt_insert_arg;
-		fuse_reply_lock;
-		fuse_req_interrupt_func;
-		fuse_req_interrupted;
-		fuse_session_remove_chan;
-		fuse_setup;
-		fuse_setup_compat25;
-		fuse_teardown;
-		fuse_teardown_compat22;
-		fuse_unmount;
-		fuse_unmount_compat22;
-} FUSE_2.5;
-
-FUSE_2.7 {
-	global:
-		fuse_fs_access;
-		fuse_fs_bmap;
-		fuse_fs_chmod;
-		fuse_fs_chown;
-		fuse_fs_create;
-		fuse_fs_destroy;
-		fuse_fs_fgetattr;
-		fuse_fs_flush;
-		fuse_fs_fsync;
-		fuse_fs_fsyncdir;
-		fuse_fs_ftruncate;
-		fuse_fs_getattr;
-		fuse_fs_getxattr;
-		fuse_fs_init;
-		fuse_fs_link;
-		fuse_fs_listxattr;
-		fuse_fs_lock;
-		fuse_fs_mkdir;
-		fuse_fs_mknod;
-		fuse_fs_new;
-		fuse_fs_open;
-		fuse_fs_opendir;
-		fuse_fs_read;
-		fuse_fs_readdir;
-		fuse_fs_readlink;
-		fuse_fs_release;
-		fuse_fs_releasedir;
-		fuse_fs_removexattr;
-		fuse_fs_rename;
-		fuse_fs_rmdir;
-		fuse_fs_setxattr;
-		fuse_fs_statfs;
-		fuse_fs_symlink;
-		fuse_fs_truncate;
-		fuse_fs_unlink;
-		fuse_fs_utimens;
-		fuse_fs_write;
-		fuse_register_module;
-		fuse_reply_iov;
-		fuse_version;
-} FUSE_2.6;
-
-FUSE_2.7.5 {
-	global:
-		fuse_reply_bmap;
-} FUSE_2.7;
-
-FUSE_2.8 {
-	global:
-		cuse_lowlevel_new;
-		cuse_lowlevel_main;
-		cuse_lowlevel_setup;
-		cuse_lowlevel_teardown;
-		fuse_fs_ioctl;
-		fuse_fs_poll;
-		fuse_get_context;
-		fuse_getgroups;
-		fuse_lowlevel_notify_inval_entry;
-		fuse_lowlevel_notify_inval_inode;
-		fuse_lowlevel_notify_poll;
-		fuse_notify_poll;
-		fuse_opt_add_opt_escaped;
-		fuse_pollhandle_destroy;
-		fuse_reply_ioctl;
-		fuse_reply_ioctl_iov;
-		fuse_reply_ioctl_retry;
-		fuse_reply_poll;
-		fuse_req_ctx;
-		fuse_req_getgroups;
-		fuse_session_data;
-} FUSE_2.7.5;
-
-FUSE_2.9 {
-	global:
-		fuse_buf_copy;
-		fuse_buf_size;
-		fuse_fs_read_buf;
-		fuse_fs_write_buf;
-		fuse_lowlevel_notify_retrieve;
-		fuse_lowlevel_notify_store;
-		fuse_reply_data;
-		fuse_session_process_buf;
-		fuse_session_receive_buf;
-		fuse_start_cleanup_thread;
-		fuse_stop_cleanup_thread;
-		fuse_clean_cache;
-		fuse_lowlevel_notify_delete;
-		fuse_fs_flock;
-} FUSE_2.8;
-
-FUSE_2.9.1 {
-	global:
-		fuse_fs_fallocate;
-
-	local:
-		*;
-} FUSE_2.9;

libfuse/lib/helper.c

@@ -11,7 +11,6 @@
 #include "fuse_misc.h"
 #include "fuse_opt.h"
 #include "fuse_lowlevel.h"
-#include "fuse_common_compat.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -23,472 +22,386 @@
 #include <sys/param.h>
 
 enum  {
-	KEY_HELP,
-	KEY_HELP_NOHEADER,
-	KEY_VERSION,
+  KEY_HELP,
+  KEY_HELP_NOHEADER,
+  KEY_VERSION,
 };
 
-struct helper_opts {
-	int singlethread;
-	int foreground;
-	int nodefault_subtype;
-	char *mountpoint;
+struct helper_opts
+{
+  int foreground;
+  int nodefault_subtype;
+  char *mountpoint;
 };
 
 #define FUSE_HELPER_OPT(t, p) { t, offsetof(struct helper_opts, p), 1 }
 
-static const struct fuse_opt fuse_helper_opts[] = {
-	FUSE_HELPER_OPT("-d",		foreground),
-	FUSE_HELPER_OPT("debug",	foreground),
-	FUSE_HELPER_OPT("-f",		foreground),
-	FUSE_HELPER_OPT("-s",		singlethread),
-	FUSE_HELPER_OPT("fsname=",	nodefault_subtype),
-	FUSE_HELPER_OPT("subtype=",	nodefault_subtype),
-
-	FUSE_OPT_KEY("-h",		KEY_HELP),
-	FUSE_OPT_KEY("--help",		KEY_HELP),
-	FUSE_OPT_KEY("-ho",		KEY_HELP_NOHEADER),
-	FUSE_OPT_KEY("-V",		KEY_VERSION),
-	FUSE_OPT_KEY("--version",	KEY_VERSION),
-	FUSE_OPT_KEY("-d",		FUSE_OPT_KEY_KEEP),
-	FUSE_OPT_KEY("debug",		FUSE_OPT_KEY_KEEP),
-	FUSE_OPT_KEY("fsname=",		FUSE_OPT_KEY_KEEP),
-	FUSE_OPT_KEY("subtype=",	FUSE_OPT_KEY_KEEP),
-	FUSE_OPT_END
-};
+static
+const
+struct fuse_opt fuse_helper_opts[] =
+  {
+    FUSE_HELPER_OPT("-f",	foreground),
+    FUSE_HELPER_OPT("fsname=",	nodefault_subtype),
+    FUSE_HELPER_OPT("subtype=",	nodefault_subtype),
+    FUSE_OPT_KEY("-h",		KEY_HELP),
+    FUSE_OPT_KEY("--help",	KEY_HELP),
+    FUSE_OPT_KEY("-ho",		KEY_HELP_NOHEADER),
+    FUSE_OPT_KEY("-V",		KEY_VERSION),
+    FUSE_OPT_KEY("--version",	KEY_VERSION),
+    FUSE_OPT_KEY("-d",		FUSE_OPT_KEY_KEEP),
+    FUSE_OPT_KEY("debug",	FUSE_OPT_KEY_KEEP),
+    FUSE_OPT_KEY("fsname=",	FUSE_OPT_KEY_KEEP),
+    FUSE_OPT_KEY("subtype=",	FUSE_OPT_KEY_KEEP),
+    FUSE_OPT_END
+  };
 
 static void usage(const char *progname)
 {
-	fprintf(stderr,
-		"usage: %s mountpoint [options]\n\n", progname);
-	fprintf(stderr,
-		"general options:\n"
-		"    -o opt,[opt...]        mount options\n"
-		"    -h   --help            print help\n"
-		"    -V   --version         print version\n"
-		"\n");
+  fprintf(stderr,
+          "usage: %s mountpoint [options]\n\n", progname);
+  fprintf(stderr,
+          "general options:\n"
+          "    -o opt,[opt...]        mount options\n"
+          "    -h   --help            print help\n"
+          "    -V   --version         print version\n"
+          "\n");
 }
 
 static void helper_help(void)
 {
-	fprintf(stderr,
-		"FUSE options:\n"
-		"    -d   -o debug          enable debug output (implies -f)\n"
-		"    -f                     foreground operation\n"
-		"    -s                     disable multi-threaded operation\n"
-		"\n"
-		);
+  fprintf(stderr,
+          "FUSE options:\n"
+          "    -d   -o debug          enable debug output (implies -f)\n"
+          "    -f                     foreground operation\n"
+          "\n"
+          );
 }
 
 static void helper_version(void)
 {
-	fprintf(stderr, "FUSE library version: %s\n", PACKAGE_VERSION);
+  fprintf(stderr, "FUSE library version: %s\n", PACKAGE_VERSION);
 }
 
 static int fuse_helper_opt_proc(void *data, const char *arg, int key,
 				struct fuse_args *outargs)
 {
-	struct helper_opts *hopts = data;
+  struct helper_opts *hopts = data;
 
-	switch (key) {
-	case KEY_HELP:
-		usage(outargs->argv[0]);
-		/* fall through */
+  switch (key) {
+  case KEY_HELP:
+    usage(outargs->argv[0]);
+    /* fall through */
 
-	case KEY_HELP_NOHEADER:
-		helper_help();
-		return fuse_opt_add_arg(outargs, "-h");
+  case KEY_HELP_NOHEADER:
+    helper_help();
+    return fuse_opt_add_arg(outargs, "-h");
 
-	case KEY_VERSION:
-		helper_version();
-		return 1;
+  case KEY_VERSION:
+    helper_version();
+    return 1;
 
-	case FUSE_OPT_KEY_NONOPT:
-		if (!hopts->mountpoint) {
-			char mountpoint[PATH_MAX];
-			if (realpath(arg, mountpoint) == NULL) {
-				fprintf(stderr,
-					"fuse: bad mount point `%s': %s\n",
-					arg, strerror(errno));
-				return -1;
-			}
-			return fuse_opt_add_opt(&hopts->mountpoint, mountpoint);
-		} else {
-			fprintf(stderr, "fuse: invalid argument `%s'\n", arg);
-			return -1;
-		}
+  case FUSE_OPT_KEY_NONOPT:
+    if (!hopts->mountpoint) {
+      char mountpoint[PATH_MAX];
+      if (realpath(arg, mountpoint) == NULL) {
+        fprintf(stderr,
+                "fuse: bad mount point `%s': %s\n",
+                arg, strerror(errno));
+        return -1;
+      }
+      return fuse_opt_add_opt(&hopts->mountpoint, mountpoint);
+    } else {
+      fprintf(stderr, "fuse: invalid argument `%s'\n", arg);
+      return -1;
+    }
 
-	default:
-		return 1;
-	}
+  default:
+    return 1;
+  }
 }
 
 static int add_default_subtype(const char *progname, struct fuse_args *args)
 {
-	int res;
-	char *subtype_opt;
-	const char *basename = strrchr(progname, '/');
-	if (basename == NULL)
-		basename = progname;
-	else if (basename[1] != '\0')
-		basename++;
+  int res;
+  char *subtype_opt;
+  const char *basename = strrchr(progname, '/');
+  if (basename == NULL)
+    basename = progname;
+  else if (basename[1] != '\0')
+    basename++;
 
-	subtype_opt = (char *) malloc(strlen(basename) + 64);
-	if (subtype_opt == NULL) {
-		fprintf(stderr, "fuse: memory allocation failed\n");
-		return -1;
-	}
-	sprintf(subtype_opt, "-osubtype=%s", basename);
-	res = fuse_opt_add_arg(args, subtype_opt);
-	free(subtype_opt);
-	return res;
+  subtype_opt = (char *) malloc(strlen(basename) + 64);
+  if (subtype_opt == NULL) {
+    fprintf(stderr, "fuse: memory allocation failed\n");
+    return -1;
+  }
+  sprintf(subtype_opt, "-osubtype=%s", basename);
+  res = fuse_opt_add_arg(args, subtype_opt);
+  free(subtype_opt);
+  return res;
 }
 
-int fuse_parse_cmdline(struct fuse_args *args, char **mountpoint,
-		       int *multithreaded, int *foreground)
+int
+fuse_parse_cmdline(struct fuse_args  *args_,
+                   char             **mountpoint_,
+                   int               *foreground_)
 {
-	int res;
-	struct helper_opts hopts;
+  int res;
+  struct helper_opts hopts;
 
-	memset(&hopts, 0, sizeof(hopts));
-	res = fuse_opt_parse(args, &hopts, fuse_helper_opts,
-			     fuse_helper_opt_proc);
-	if (res == -1)
-		return -1;
+  memset(&hopts, 0, sizeof(hopts));
 
-	if (!hopts.nodefault_subtype) {
-		res = add_default_subtype(args->argv[0], args);
-		if (res == -1)
-			goto err;
-	}
-	if (mountpoint)
-		*mountpoint = hopts.mountpoint;
-	else
-		free(hopts.mountpoint);
+  res = fuse_opt_parse(args_,
+                       &hopts,
+                       fuse_helper_opts,
+                       fuse_helper_opt_proc);
+  if(res == -1)
+    return -1;
 
-	if (multithreaded)
-		*multithreaded = !hopts.singlethread;
-	if (foreground)
-		*foreground = hopts.foreground;
-	return 0;
+  if(!hopts.nodefault_subtype)
+    {
+      res = add_default_subtype(args_->argv[0], args_);
+      if(res == -1)
+        goto err;
+    }
 
-err:
-	free(hopts.mountpoint);
-	return -1;
+  if(mountpoint_)
+    *mountpoint_ = hopts.mountpoint;
+  else
+    free(hopts.mountpoint);
+
+  if(foreground_)
+    *foreground_ = hopts.foreground;
+
+  return 0;
+
+ err:
+  free(hopts.mountpoint);
+  return -1;
 }
 
 int fuse_daemonize(int foreground)
 {
-	if (!foreground) {
-		int nullfd;
-		int waiter[2];
-		char completed;
+  if (!foreground) {
+    int nullfd;
+    int waiter[2];
+    char completed;
 
-		if (pipe(waiter)) {
-			perror("fuse_daemonize: pipe");
-			return -1;
-		}
+    if (pipe(waiter)) {
+      perror("fuse_daemonize: pipe");
+      return -1;
+    }
 
-		/*
-		 * demonize current process by forking it and killing the
-		 * parent.  This makes current process as a child of 'init'.
-		 */
-		switch(fork()) {
-		case -1:
-			perror("fuse_daemonize: fork");
-			return -1;
-		case 0:
-			break;
-		default:
-			read(waiter[0], &completed, sizeof(completed));
-			_exit(0);
-		}
+    /*
+     * demonize current process by forking it and killing the
+     * parent.  This makes current process as a child of 'init'.
+     */
+    switch(fork()) {
+    case -1:
+      perror("fuse_daemonize: fork");
+      return -1;
+    case 0:
+      break;
+    default:
+      read(waiter[0], &completed, sizeof(completed));
+      _exit(0);
+    }
 
-		if (setsid() == -1) {
-			perror("fuse_daemonize: setsid");
-			return -1;
-		}
+    if (setsid() == -1) {
+      perror("fuse_daemonize: setsid");
+      return -1;
+    }
 
-		(void) chdir("/");
+    (void) chdir("/");
 
-		nullfd = open("/dev/null", O_RDWR, 0);
-		if (nullfd != -1) {
-			(void) dup2(nullfd, 0);
-			(void) dup2(nullfd, 1);
-			(void) dup2(nullfd, 2);
-			if (nullfd > 2)
-				close(nullfd);
-		}
+    nullfd = open("/dev/null", O_RDWR, 0);
+    if (nullfd != -1) {
+      (void) dup2(nullfd, 0);
+      (void) dup2(nullfd, 1);
+      (void) dup2(nullfd, 2);
+      if (nullfd > 2)
+        close(nullfd);
+    }
 
-		/* Propagate completion of daemon initializatation */
-		completed = 1;
-		write(waiter[1], &completed, sizeof(completed));
-		close(waiter[0]);
-		close(waiter[1]);
-	}
-	return 0;
+    /* Propagate completion of daemon initializatation */
+    completed = 1;
+    write(waiter[1], &completed, sizeof(completed));
+    close(waiter[0]);
+    close(waiter[1]);
+  }
+  return 0;
 }
 
-static struct fuse_chan *fuse_mount_common(const char *mountpoint,
-					   struct fuse_args *args)
+static
+struct fuse_chan *
+fuse_mount_common(const char       *mountpoint_,
+                  struct fuse_args *args_)
 {
-	struct fuse_chan *ch;
-	int fd;
+  int fd;
+  long bufsize;
+  long pagesize;
+  struct fuse_chan *ch;
 
-	/*
-	 * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
-	 * would ensue.
-	 */
-	do {
-		fd = open("/dev/null", O_RDWR);
-		if (fd > 2)
-			close(fd);
-	} while (fd >= 0 && fd <= 2);
+  /*
+   * Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
+   * would ensue.
+   */
+  do
+    {
+      fd = open("/dev/null", O_RDWR);
+      if(fd > 2)
+        close(fd);
+    } while(fd >= 0 && fd <= 2);
 
-	fd = fuse_mount_compat25(mountpoint, args);
-	if (fd == -1)
-		return NULL;
+  fd = fuse_kern_mount(mountpoint_,args_);
+  if(fd == -1)
+    return NULL;
 
-	ch = fuse_kern_chan_new(fd);
-	if (!ch)
-		fuse_kern_unmount(mountpoint, fd);
+  pagesize = sysconf(_SC_PAGESIZE);
+  bufsize  = ((FUSE_MAX_MAX_PAGES + 1) * pagesize);
 
-	return ch;
+  ch = fuse_chan_new(fd,bufsize);
+  if(!ch)
+    fuse_kern_unmount(mountpoint_, fd);
+
+  return ch;
 }
 
-struct fuse_chan *fuse_mount(const char *mountpoint, struct fuse_args *args)
+struct fuse_chan *
+fuse_mount(const char       *mountpoint_,
+           struct fuse_args *args_)
 {
-	return fuse_mount_common(mountpoint, args);
+  return fuse_mount_common(mountpoint_,args_);
 }
 
 static void fuse_unmount_common(const char *mountpoint, struct fuse_chan *ch)
 {
-	if (mountpoint) {
-		int fd = ch ? fuse_chan_clearfd(ch) : -1;
-		fuse_kern_unmount(mountpoint, fd);
-		if (ch)
-			fuse_chan_destroy(ch);
-	}
+  if (mountpoint) {
+    int fd = ch ? fuse_chan_clearfd(ch) : -1;
+    fuse_kern_unmount(mountpoint, fd);
+    if (ch)
+      fuse_chan_destroy(ch);
+  }
 }
 
 void fuse_unmount(const char *mountpoint, struct fuse_chan *ch)
 {
-	fuse_unmount_common(mountpoint, ch);
+  fuse_unmount_common(mountpoint, ch);
 }
 
-struct fuse *fuse_setup_common(int argc, char *argv[],
-			       const struct fuse_operations *op,
-			       size_t op_size,
-			       char **mountpoint,
-			       int *multithreaded,
-			       int *fd,
-			       void *user_data,
-			       int compat)
+struct fuse *
+fuse_setup_common(int argc,
+                  char *argv[],
+                  const struct fuse_operations *op,
+                  size_t op_size,
+                  char **mountpoint,
+                  int *fd)
 {
-	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
-	struct fuse_chan *ch;
-	struct fuse *fuse;
-	int foreground;
-	int res;
+  struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+  struct fuse_chan *ch;
+  struct fuse *fuse;
+  int foreground;
+  int res;
 
-	res = fuse_parse_cmdline(&args, mountpoint, multithreaded, &foreground);
-	if (res == -1)
-		return NULL;
+  res = fuse_parse_cmdline(&args, mountpoint, &foreground);
+  if (res == -1)
+    return NULL;
 
-	ch = fuse_mount_common(*mountpoint, &args);
-	if (!ch) {
-		fuse_opt_free_args(&args);
-		goto err_free;
-	}
+  ch = fuse_mount_common(*mountpoint, &args);
+  if (!ch) {
+    fuse_opt_free_args(&args);
+    goto err_free;
+  }
 
-	fuse = fuse_new_common(ch, &args, op, op_size, user_data, compat);
-	fuse_opt_free_args(&args);
-	if (fuse == NULL)
-		goto err_unmount;
+  fuse = fuse_new_common(ch, &args, op, op_size);
+  fuse_opt_free_args(&args);
+  if (fuse == NULL)
+    goto err_unmount;
 
-	res = fuse_daemonize(foreground);
-	if (res == -1)
-		goto err_unmount;
+  res = fuse_daemonize(foreground);
+  if (res == -1)
+    goto err_unmount;
 
-	res = fuse_set_signal_handlers(fuse_get_session(fuse));
-	if (res == -1)
-		goto err_unmount;
+  res = fuse_set_signal_handlers(fuse_get_session(fuse));
+  if (res == -1)
+    goto err_unmount;
 
-	if (fd)
-		*fd = fuse_chan_fd(ch);
+  if (fd)
+    *fd = fuse_chan_fd(ch);
 
-	return fuse;
+  return fuse;
 
-err_unmount:
-	fuse_unmount_common(*mountpoint, ch);
-	if (fuse)
-		fuse_destroy(fuse);
-err_free:
-	free(*mountpoint);
-	return NULL;
+ err_unmount:
+  fuse_unmount_common(*mountpoint, ch);
+  if (fuse)
+    fuse_destroy(fuse);
+ err_free:
+  free(*mountpoint);
+  return NULL;
 }
 
 struct fuse *fuse_setup(int argc, char *argv[],
 			const struct fuse_operations *op, size_t op_size,
-			char **mountpoint, int *multithreaded, void *user_data)
+			char **mountpoint)
 {
-	return fuse_setup_common(argc, argv, op, op_size, mountpoint,
-				 multithreaded, NULL, user_data, 0);
+  return fuse_setup_common(argc, argv, op, op_size, mountpoint,
+                           NULL);
 }
 
 static void fuse_teardown_common(struct fuse *fuse, char *mountpoint)
 {
-	struct fuse_session *se = fuse_get_session(fuse);
-	struct fuse_chan *ch = fuse_session_next_chan(se, NULL);
-	fuse_remove_signal_handlers(se);
-	fuse_unmount_common(mountpoint, ch);
-	fuse_destroy(fuse);
-	free(mountpoint);
+  struct fuse_session *se = fuse_get_session(fuse);
+  struct fuse_chan *ch = se->ch;
+  fuse_remove_signal_handlers(se);
+  fuse_unmount_common(mountpoint, ch);
+  fuse_destroy(fuse);
+  free(mountpoint);
 }
 
 void fuse_teardown(struct fuse *fuse, char *mountpoint)
 {
-	fuse_teardown_common(fuse, mountpoint);
+  fuse_teardown_common(fuse, mountpoint);
 }
 
 static int fuse_main_common(int argc, char *argv[],
-			    const struct fuse_operations *op, size_t op_size,
-			    void *user_data, int compat)
+			    const struct fuse_operations *op, size_t op_size)
 {
-	struct fuse *fuse;
-	char *mountpoint;
-	int multithreaded;
-	int res;
+  struct fuse *fuse;
+  char *mountpoint;
+  int res;
 
-	fuse = fuse_setup_common(argc, argv, op, op_size, &mountpoint,
-				 &multithreaded, NULL, user_data, compat);
-	if (fuse == NULL)
-		return 1;
+  fuse = fuse_setup_common(argc, argv, op, op_size,
+                           &mountpoint,
+                           NULL);
+  if (fuse == NULL)
+    return 1;
 
-	if (multithreaded)
-		res = fuse_loop_mt(fuse);
-	else
-		res = fuse_loop(fuse);
+  res = fuse_loop_mt(fuse);
 
-	fuse_teardown_common(fuse, mountpoint);
-	if (res == -1)
-		return 1;
+  fuse_teardown_common(fuse, mountpoint);
+  if (res == -1)
+    return 1;
 
-	return 0;
+  return 0;
 }
 
-int fuse_main_real(int argc, char *argv[], const struct fuse_operations *op,
-		   size_t op_size, void *user_data)
+int fuse_main_real(int argc,
+                   char *argv[],
+                   const struct fuse_operations *op,
+		   size_t op_size)
 {
-	return fuse_main_common(argc, argv, op, op_size, user_data, 0);
+  return fuse_main_common(argc, argv, op, op_size);
 }
 
 #undef fuse_main
 int fuse_main(void);
 int fuse_main(void)
 {
-	fprintf(stderr, "fuse_main(): This function does not exist\n");
-	return -1;
+  fprintf(stderr, "fuse_main(): This function does not exist\n");
+  return -1;
 }
 
 int fuse_version(void)
 {
-	return FUSE_VERSION;
+  return FUSE_VERSION;
 }
-
-#include "fuse_compat.h"
-
-#if !defined(__FreeBSD__) && !defined(__NetBSD__)
-
-struct fuse *fuse_setup_compat22(int argc, char *argv[],
-				 const struct fuse_operations_compat22 *op,
-				 size_t op_size, char **mountpoint,
-				 int *multithreaded, int *fd)
-{
-	return fuse_setup_common(argc, argv, (struct fuse_operations *) op,
-				 op_size, mountpoint, multithreaded, fd, NULL,
-				 22);
-}
-
-struct fuse *fuse_setup_compat2(int argc, char *argv[],
-				const struct fuse_operations_compat2 *op,
-				char **mountpoint, int *multithreaded,
-				int *fd)
-{
-	return fuse_setup_common(argc, argv, (struct fuse_operations *) op,
-				 sizeof(struct fuse_operations_compat2),
-				 mountpoint, multithreaded, fd, NULL, 21);
-}
-
-int fuse_main_real_compat22(int argc, char *argv[],
-			    const struct fuse_operations_compat22 *op,
-			    size_t op_size)
-{
-	return fuse_main_common(argc, argv, (struct fuse_operations *) op,
-				op_size, NULL, 22);
-}
-
-void fuse_main_compat1(int argc, char *argv[],
-		       const struct fuse_operations_compat1 *op)
-{
-	fuse_main_common(argc, argv, (struct fuse_operations *) op,
-			 sizeof(struct fuse_operations_compat1), NULL, 11);
-}
-
-int fuse_main_compat2(int argc, char *argv[],
-		      const struct fuse_operations_compat2 *op)
-{
-	return fuse_main_common(argc, argv, (struct fuse_operations *) op,
-				sizeof(struct fuse_operations_compat2), NULL,
-				21);
-}
-
-int fuse_mount_compat1(const char *mountpoint, const char *args[])
-{
-	/* just ignore mount args for now */
-	(void) args;
-	return fuse_mount_compat22(mountpoint, NULL);
-}
-
-FUSE_SYMVER(".symver fuse_setup_compat2,__fuse_setup@");
-FUSE_SYMVER(".symver fuse_setup_compat22,fuse_setup@FUSE_2.2");
-FUSE_SYMVER(".symver fuse_teardown,__fuse_teardown@");
-FUSE_SYMVER(".symver fuse_main_compat2,fuse_main@");
-FUSE_SYMVER(".symver fuse_main_real_compat22,fuse_main_real@FUSE_2.2");
-
-#endif /* __FreeBSD__ || __NetBSD__ */
-
-
-struct fuse *fuse_setup_compat25(int argc, char *argv[],
-				 const struct fuse_operations_compat25 *op,
-				 size_t op_size, char **mountpoint,
-				 int *multithreaded, int *fd)
-{
-	return fuse_setup_common(argc, argv, (struct fuse_operations *) op,
-				 op_size, mountpoint, multithreaded, fd, NULL,
-				 25);
-}
-
-int fuse_main_real_compat25(int argc, char *argv[],
-			    const struct fuse_operations_compat25 *op,
-			    size_t op_size)
-{
-	return fuse_main_common(argc, argv, (struct fuse_operations *) op,
-				op_size, NULL, 25);
-}
-
-void fuse_teardown_compat22(struct fuse *fuse, int fd, char *mountpoint)
-{
-	(void) fd;
-	fuse_teardown_common(fuse, mountpoint);
-}
-
-int fuse_mount_compat25(const char *mountpoint, struct fuse_args *args)
-{
-	return fuse_kern_mount(mountpoint, args);
-}
-
-FUSE_SYMVER(".symver fuse_setup_compat25,fuse_setup@FUSE_2.5");
-FUSE_SYMVER(".symver fuse_teardown_compat22,fuse_teardown@FUSE_2.2");
-FUSE_SYMVER(".symver fuse_main_real_compat25,fuse_main_real@FUSE_2.5");
-FUSE_SYMVER(".symver fuse_mount_compat25,fuse_mount@FUSE_2.5");

libfuse/lib/khash.h

@@ -0,0 +1,627 @@
+/* The MIT License
+
+   Copyright (c) 2008, 2009, 2011 by Attractive Chaos <attractor@live.co.uk>
+
+   Permission is hereby granted, free of charge, to any person obtaining
+   a copy of this software and associated documentation files (the
+   "Software"), to deal in the Software without restriction, including
+   without limitation the rights to use, copy, modify, merge, publish,
+   distribute, sublicense, and/or sell copies of the Software, and to
+   permit persons to whom the Software is furnished to do so, subject to
+   the following conditions:
+
+   The above copyright notice and this permission notice shall be
+   included in all copies or substantial portions of the Software.
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+   BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+   ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+   SOFTWARE.
+*/
+
+/*
+  An example:
+
+  #include "khash.h"
+  KHASH_MAP_INIT_INT(32, char)
+  int main() {
+  int ret, is_missing;
+  khiter_t k;
+  khash_t(32) *h = kh_init(32);
+  k = kh_put(32, h, 5, &ret);
+  kh_value(h, k) = 10;
+  k = kh_get(32, h, 10);
+  is_missing = (k == kh_end(h));
+  k = kh_get(32, h, 5);
+  kh_del(32, h, k);
+  for (k = kh_begin(h); k != kh_end(h); ++k)
+  if (kh_exist(h, k)) kh_value(h, k) = 1;
+  kh_destroy(32, h);
+  return 0;
+  }
+*/
+
+/*
+  2013-05-02 (0.2.8):
+
+  * Use quadratic probing. When the capacity is power of 2, stepping function
+  i*(i+1)/2 guarantees to traverse each bucket. It is better than double
+  hashing on cache performance and is more robust than linear probing.
+
+  In theory, double hashing should be more robust than quadratic probing.
+  However, my implementation is probably not for large hash tables, because
+  the second hash function is closely tied to the first hash function,
+  which reduce the effectiveness of double hashing.
+
+  Reference: http://research.cs.vt.edu/AVresearch/hashing/quadratic.php
+
+  2011-12-29 (0.2.7):
+
+  * Minor code clean up; no actual effect.
+
+  2011-09-16 (0.2.6):
+
+  * The capacity is a power of 2. This seems to dramatically improve the
+  speed for simple keys. Thank Zilong Tan for the suggestion. Reference:
+
+  - http://code.google.com/p/ulib/
+  - http://nothings.org/computer/judy/
+
+  * Allow to optionally use linear probing which usually has better
+  performance for random input. Double hashing is still the default as it
+  is more robust to certain non-random input.
+
+  * Added Wang's integer hash function (not used by default). This hash
+  function is more robust to certain non-random input.
+
+  2011-02-14 (0.2.5):
+
+  * Allow to declare global functions.
+
+  2009-09-26 (0.2.4):
+
+  * Improve portability
+
+  2008-09-19 (0.2.3):
+
+  * Corrected the example
+  * Improved interfaces
+
+  2008-09-11 (0.2.2):
+
+  * Improved speed a little in kh_put()
+
+  2008-09-10 (0.2.1):
+
+  * Added kh_clear()
+  * Fixed a compiling error
+
+  2008-09-02 (0.2.0):
+
+  * Changed to token concatenation which increases flexibility.
+
+  2008-08-31 (0.1.2):
+
+  * Fixed a bug in kh_get(), which has not been tested previously.
+
+  2008-08-31 (0.1.1):
+
+  * Added destructor
+  */
+
+
+#ifndef __AC_KHASH_H
+#define __AC_KHASH_H
+
+/*!
+  @header
+
+  Generic hash table library.
+*/
+
+#define AC_VERSION_KHASH_H "0.2.8"
+
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+/* compiler specific configuration */
+
+#if UINT_MAX == 0xffffffffu
+typedef unsigned int khint32_t;
+#elif ULONG_MAX == 0xffffffffu
+typedef unsigned long khint32_t;
+#endif
+
+#if ULONG_MAX == ULLONG_MAX
+typedef unsigned long khint64_t;
+#else
+typedef unsigned long long khint64_t;
+#endif
+
+#ifndef kh_inline
+#ifdef _MSC_VER
+#define kh_inline __inline
+#else
+#define kh_inline inline
+#endif
+#endif /* kh_inline */
+
+#ifndef klib_unused
+#if (defined __clang__ && __clang_major__ >= 3) || (defined __GNUC__ && __GNUC__ >= 3)
+#define klib_unused __attribute__ ((__unused__))
+#else
+#define klib_unused
+#endif
+#endif /* klib_unused */
+
+typedef khint32_t khint_t;
+typedef khint_t khiter_t;
+
+#define __ac_isempty(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&2)
+#define __ac_isdel(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&1)
+#define __ac_iseither(flag, i) ((flag[i>>4]>>((i&0xfU)<<1))&3)
+#define __ac_set_isdel_false(flag, i) (flag[i>>4]&=~(1ul<<((i&0xfU)<<1)))
+#define __ac_set_isempty_false(flag, i) (flag[i>>4]&=~(2ul<<((i&0xfU)<<1)))
+#define __ac_set_isboth_false(flag, i) (flag[i>>4]&=~(3ul<<((i&0xfU)<<1)))
+#define __ac_set_isdel_true(flag, i) (flag[i>>4]|=1ul<<((i&0xfU)<<1))
+
+#define __ac_fsize(m) ((m) < 16? 1 : (m)>>4)
+
+#ifndef kroundup32
+#define kroundup32(x) (--(x), (x)|=(x)>>1, (x)|=(x)>>2, (x)|=(x)>>4, (x)|=(x)>>8, (x)|=(x)>>16, ++(x))
+#endif
+
+#ifndef kcalloc
+#define kcalloc(N,Z) calloc(N,Z)
+#endif
+#ifndef kmalloc
+#define kmalloc(Z) malloc(Z)
+#endif
+#ifndef krealloc
+#define krealloc(P,Z) realloc(P,Z)
+#endif
+#ifndef kfree
+#define kfree(P) free(P)
+#endif
+
+static const double __ac_HASH_UPPER = 0.77;
+
+#define __KHASH_TYPE(name, khkey_t, khval_t)            \
+  typedef struct kh_##name##_s {                        \
+    khint_t n_buckets, size, n_occupied, upper_bound;   \
+    khint32_t *flags;                                   \
+    khkey_t *keys;                                      \
+    khval_t *vals;                                      \
+  } kh_##name##_t;
+
+#define __KHASH_PROTOTYPES(name, khkey_t, khval_t)                      \
+  extern kh_##name##_t *kh_init_##name(void);                           \
+  extern void kh_destroy_##name(kh_##name##_t *h);                      \
+  extern void kh_clear_##name(kh_##name##_t *h);                        \
+  extern khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key); 	\
+  extern int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets); \
+  extern khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret); \
+  extern void kh_del_##name(kh_##name##_t *h, khint_t x);
+
+#define __KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
+  SCOPE kh_##name##_t *kh_init_##name(void) {                           \
+    return (kh_##name##_t*)kcalloc(1, sizeof(kh_##name##_t));		\
+  }                                                                     \
+  SCOPE void kh_destroy_##name(kh_##name##_t *h)                        \
+  {                                                                     \
+    if (h) {                                                            \
+      kfree((void *)h->keys); kfree(h->flags);                          \
+      kfree((void *)h->vals);                                           \
+      kfree(h);                                                         \
+    }                                                                   \
+  }                                                                     \
+  SCOPE void kh_clear_##name(kh_##name##_t *h)                          \
+  {                                                                     \
+    if (h && h->flags) {                                                \
+      memset(h->flags, 0xaa, __ac_fsize(h->n_buckets) * sizeof(khint32_t)); \
+      h->size = h->n_occupied = 0;                                      \
+    }                                                                   \
+  }                                                                     \
+  SCOPE khint_t kh_get_##name(const kh_##name##_t *h, khkey_t key) 	\
+  {                                                                     \
+    if (h->n_buckets) {                                                 \
+      khint_t k, i, last, mask, step = 0;                               \
+      mask = h->n_buckets - 1;                                          \
+      k = __hash_func(key); i = k & mask;                               \
+      last = i;                                                         \
+      while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
+        i = (i + (++step)) & mask;                                      \
+        if (i == last) return h->n_buckets;                             \
+      }                                                                 \
+      return __ac_iseither(h->flags, i)? h->n_buckets : i;		\
+    } else return 0;                                                    \
+  }                                                                     \
+  SCOPE int kh_resize_##name(kh_##name##_t *h, khint_t new_n_buckets)   \
+  { /* This function uses 0.25*n_buckets bytes of working space instead of [sizeof(key_t+val_t)+.25]*n_buckets. */ \
+    khint32_t *new_flags = 0;                                           \
+    khint_t j = 1;                                                      \
+    {                                                                   \
+      kroundup32(new_n_buckets);                                        \
+      if (new_n_buckets < 4) new_n_buckets = 4;                         \
+      if (h->size >= (khint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5)) j = 0;	/* requested size is too small */ \
+      else { /* hash table size to be changed (shrink or expand); rehash */ \
+        new_flags = (khint32_t*)kmalloc(__ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
+        if (!new_flags) return -1;                                      \
+        memset(new_flags, 0xaa, __ac_fsize(new_n_buckets) * sizeof(khint32_t)); \
+        if (h->n_buckets < new_n_buckets) {	/* expand */		\
+          khkey_t *new_keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
+          if (!new_keys) { kfree(new_flags); return -1; }		\
+          h->keys = new_keys;                                           \
+          if (kh_is_map) {                                              \
+            khval_t *new_vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
+            if (!new_vals) { kfree(new_flags); return -1; }             \
+            h->vals = new_vals;                                         \
+          }                                                             \
+        } /* otherwise shrink */                                        \
+      }                                                                 \
+    }                                                                   \
+    if (j) { /* rehashing is needed */                                  \
+      for (j = 0; j != h->n_buckets; ++j) {                             \
+        if (__ac_iseither(h->flags, j) == 0) {                          \
+          khkey_t key = h->keys[j];                                     \
+          khval_t val;                                                  \
+          khint_t new_mask;                                             \
+          new_mask = new_n_buckets - 1;                                 \
+          if (kh_is_map) val = h->vals[j];                              \
+          __ac_set_isdel_true(h->flags, j);                             \
+          while (1) { /* kick-out process; sort of like in Cuckoo hashing */ \
+            khint_t k, i, step = 0;                                     \
+            k = __hash_func(key);                                       \
+            i = k & new_mask;                                           \
+            while (!__ac_isempty(new_flags, i)) i = (i + (++step)) & new_mask; \
+            __ac_set_isempty_false(new_flags, i);			\
+            if (i < h->n_buckets && __ac_iseither(h->flags, i) == 0) { /* kick out the existing element */ \
+              { khkey_t tmp = h->keys[i]; h->keys[i] = key; key = tmp; } \
+              if (kh_is_map) { khval_t tmp = h->vals[i]; h->vals[i] = val; val = tmp; } \
+              __ac_set_isdel_true(h->flags, i); /* mark it as deleted in the old hash table */ \
+            } else { /* write the element and jump out of the loop */   \
+              h->keys[i] = key;                                         \
+              if (kh_is_map) h->vals[i] = val;                          \
+              break;                                                    \
+            }                                                           \
+          }                                                             \
+        }                                                               \
+      }                                                                 \
+      if (h->n_buckets > new_n_buckets) { /* shrink the hash table */   \
+        h->keys = (khkey_t*)krealloc((void *)h->keys, new_n_buckets * sizeof(khkey_t)); \
+        if (kh_is_map) h->vals = (khval_t*)krealloc((void *)h->vals, new_n_buckets * sizeof(khval_t)); \
+      }                                                                 \
+      kfree(h->flags); /* free the working space */                     \
+      h->flags = new_flags;                                             \
+      h->n_buckets = new_n_buckets;                                     \
+      h->n_occupied = h->size;                                          \
+      h->upper_bound = (khint_t)(h->n_buckets * __ac_HASH_UPPER + 0.5); \
+    }                                                                   \
+    return 0;                                                           \
+  }                                                                     \
+  SCOPE khint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret)  \
+  {                                                                     \
+    khint_t x;                                                          \
+    if (h->n_occupied >= h->upper_bound) { /* update the hash table */  \
+      if (h->n_buckets > (h->size<<1)) {                                \
+        if (kh_resize_##name(h, h->n_buckets - 1) < 0) { /* clear "deleted" elements */ \
+          *ret = -1; return h->n_buckets;                               \
+        }                                                               \
+      } else if (kh_resize_##name(h, h->n_buckets + 1) < 0) { /* expand the hash table */ \
+        *ret = -1; return h->n_buckets;                                 \
+      }                                                                 \
+    } /* TODO: to implement automatically shrinking; resize() already support shrinking */ \
+    {                                                                   \
+      khint_t k, i, site, last, mask = h->n_buckets - 1, step = 0;      \
+      x = site = h->n_buckets; k = __hash_func(key); i = k & mask;      \
+      if (__ac_isempty(h->flags, i)) x = i; /* for speed up */          \
+      else {                                                            \
+        last = i;                                                       \
+        while (!__ac_isempty(h->flags, i) && (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) { \
+          if (__ac_isdel(h->flags, i)) site = i;                        \
+          i = (i + (++step)) & mask;                                    \
+          if (i == last) { x = site; break; }                           \
+        }                                                               \
+        if (x == h->n_buckets) {                                        \
+          if (__ac_isempty(h->flags, i) && site != h->n_buckets) x = site; \
+          else x = i;                                                   \
+        }                                                               \
+      }                                                                 \
+    }                                                                   \
+    if (__ac_isempty(h->flags, x)) { /* not present at all */		\
+      h->keys[x] = key;                                                 \
+      __ac_set_isboth_false(h->flags, x);                               \
+      ++h->size; ++h->n_occupied;                                       \
+      *ret = 1;                                                         \
+    } else if (__ac_isdel(h->flags, x)) { /* deleted */                 \
+      h->keys[x] = key;                                                 \
+      __ac_set_isboth_false(h->flags, x);                               \
+      ++h->size;                                                        \
+      *ret = 2;                                                         \
+    } else *ret = 0; /* Don't touch h->keys[x] if present and not deleted */ \
+    return x;                                                           \
+  }                                                                     \
+  SCOPE void kh_del_##name(kh_##name##_t *h, khint_t x)                 \
+  {                                                                     \
+    if (x != h->n_buckets && !__ac_iseither(h->flags, x)) {             \
+      __ac_set_isdel_true(h->flags, x);                                 \
+      --h->size;                                                        \
+    }                                                                   \
+  }
+
+#define KHASH_DECLARE(name, khkey_t, khval_t)   \
+  __KHASH_TYPE(name, khkey_t, khval_t)          \
+  __KHASH_PROTOTYPES(name, khkey_t, khval_t)
+
+#define KHASH_INIT2(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
+  __KHASH_TYPE(name, khkey_t, khval_t)                                  \
+  __KHASH_IMPL(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
+
+#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal) \
+  KHASH_INIT2(name, static kh_inline klib_unused, khkey_t, khval_t, kh_is_map, __hash_func, __hash_equal)
+
+/* --- BEGIN OF HASH FUNCTIONS --- */
+
+/*! @function
+  @abstract     Integer hash function
+  @param  key   The integer [khint32_t]
+  @return       The hash value [khint_t]
+*/
+#define kh_int_hash_func(key) (khint32_t)(key)
+/*! @function
+  @abstract     Integer comparison function
+*/
+#define kh_int_hash_equal(a, b) ((a) == (b))
+/*! @function
+  @abstract     64-bit integer hash function
+  @param  key   The integer [khint64_t]
+  @return       The hash value [khint_t]
+*/
+#define kh_int64_hash_func(key) (khint32_t)((key)>>33^(key)^(key)<<11)
+/*! @function
+  @abstract     64-bit integer comparison function
+*/
+#define kh_int64_hash_equal(a, b) ((a) == (b))
+/*! @function
+  @abstract     const char* hash function
+  @param  s     Pointer to a null terminated string
+  @return       The hash value
+*/
+static kh_inline khint_t __ac_X31_hash_string(const char *s)
+{
+  khint_t h = (khint_t)*s;
+  if (h) for (++s ; *s; ++s) h = (h << 5) - h + (khint_t)*s;
+  return h;
+}
+/*! @function
+  @abstract     Another interface to const char* hash function
+  @param  key   Pointer to a null terminated string [const char*]
+  @return       The hash value [khint_t]
+*/
+#define kh_str_hash_func(key) __ac_X31_hash_string(key)
+/*! @function
+  @abstract     Const char* comparison function
+*/
+#define kh_str_hash_equal(a, b) (strcmp(a, b) == 0)
+
+static kh_inline khint_t __ac_Wang_hash(khint_t key)
+{
+  key += ~(key << 15);
+  key ^=  (key >> 10);
+  key +=  (key << 3);
+  key ^=  (key >> 6);
+  key += ~(key << 11);
+  key ^=  (key >> 16);
+  return key;
+}
+#define kh_int_hash_func2(key) __ac_Wang_hash((khint_t)key)
+
+/* --- END OF HASH FUNCTIONS --- */
+
+/* Other convenient macros... */
+
+/*!
+  @abstract Type of the hash table.
+  @param  name  Name of the hash table [symbol]
+*/
+#define khash_t(name) kh_##name##_t
+
+/*! @function
+  @abstract     Initiate a hash table.
+  @param  name  Name of the hash table [symbol]
+  @return       Pointer to the hash table [khash_t(name)*]
+*/
+#define kh_init(name) kh_init_##name()
+
+/*! @function
+  @abstract     Destroy a hash table.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+*/
+#define kh_destroy(name, h) kh_destroy_##name(h)
+
+/*! @function
+  @abstract     Reset a hash table without deallocating memory.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+*/
+#define kh_clear(name, h) kh_clear_##name(h)
+
+/*! @function
+  @abstract     Resize a hash table.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  s     New size [khint_t]
+*/
+#define kh_resize(name, h, s) kh_resize_##name(h, s)
+
+/*! @function
+  @abstract     Insert a key to the hash table.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  k     Key [type of keys]
+  @param  r     Extra return code: -1 if the operation failed;
+  0 if the key is present in the hash table;
+  1 if the bucket is empty (never used); 2 if the element in
+  the bucket has been deleted [int*]
+  @return       Iterator to the inserted element [khint_t]
+*/
+#define kh_put(name, h, k, r) kh_put_##name(h, k, r)
+
+/*! @function
+  @abstract     Retrieve a key from the hash table.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  k     Key [type of keys]
+  @return       Iterator to the found element, or kh_end(h) if the element is absent [khint_t]
+*/
+#define kh_get(name, h, k) kh_get_##name(h, k)
+
+/*! @function
+  @abstract     Remove a key from the hash table.
+  @param  name  Name of the hash table [symbol]
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  k     Iterator to the element to be deleted [khint_t]
+*/
+#define kh_del(name, h, k) kh_del_##name(h, k)
+
+/*! @function
+  @abstract     Test whether a bucket contains data.
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  x     Iterator to the bucket [khint_t]
+  @return       1 if containing data; 0 otherwise [int]
+*/
+#define kh_exist(h, x) (!__ac_iseither((h)->flags, (x)))
+
+/*! @function
+  @abstract     Get key given an iterator
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  x     Iterator to the bucket [khint_t]
+  @return       Key [type of keys]
+*/
+#define kh_key(h, x) ((h)->keys[x])
+
+/*! @function
+  @abstract     Get value given an iterator
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  x     Iterator to the bucket [khint_t]
+  @return       Value [type of values]
+  @discussion   For hash sets, calling this results in segfault.
+*/
+#define kh_val(h, x) ((h)->vals[x])
+
+/*! @function
+  @abstract     Alias of kh_val()
+*/
+#define kh_value(h, x) ((h)->vals[x])
+
+/*! @function
+  @abstract     Get the start iterator
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @return       The start iterator [khint_t]
+*/
+#define kh_begin(h) (khint_t)(0)
+
+/*! @function
+  @abstract     Get the end iterator
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @return       The end iterator [khint_t]
+*/
+#define kh_end(h) ((h)->n_buckets)
+
+/*! @function
+  @abstract     Get the number of elements in the hash table
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @return       Number of elements in the hash table [khint_t]
+*/
+#define kh_size(h) ((h)->size)
+
+/*! @function
+  @abstract     Get the number of buckets in the hash table
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @return       Number of buckets in the hash table [khint_t]
+*/
+#define kh_n_buckets(h) ((h)->n_buckets)
+
+/*! @function
+  @abstract     Iterate over the entries in the hash table
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  kvar  Variable to which key will be assigned
+  @param  vvar  Variable to which value will be assigned
+  @param  code  Block of code to execute
+*/
+#define kh_foreach(h, kvar, vvar, code) { khint_t __i;  \
+    for (__i = kh_begin(h); __i != kh_end(h); ++__i) {  \
+      if (!kh_exist(h,__i)) continue;                   \
+      (kvar) = kh_key(h,__i);                           \
+      (vvar) = kh_val(h,__i);                           \
+      code;                                             \
+    } }
+
+/*! @function
+  @abstract     Iterate over the values in the hash table
+  @param  h     Pointer to the hash table [khash_t(name)*]
+  @param  vvar  Variable to which value will be assigned
+  @param  code  Block of code to execute
+*/
+#define kh_foreach_value(h, vvar, code) { khint_t __i;  \
+    for (__i = kh_begin(h); __i != kh_end(h); ++__i) {  \
+      if (!kh_exist(h,__i)) continue;                   \
+      (vvar) = kh_val(h,__i);                           \
+      code;                                             \
+    } }
+
+/* More convenient interfaces */
+
+/*! @function
+  @abstract     Instantiate a hash set containing integer keys
+  @param  name  Name of the hash table [symbol]
+*/
+#define KHASH_SET_INIT_INT(name)                                        \
+  KHASH_INIT(name, khint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal)
+
+/*! @function
+  @abstract     Instantiate a hash map containing integer keys
+  @param  name  Name of the hash table [symbol]
+  @param  khval_t  Type of values [type]
+*/
+#define KHASH_MAP_INIT_INT(name, khval_t)                               \
+  KHASH_INIT(name, khint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)
+
+/*! @function
+  @abstract     Instantiate a hash set containing 64-bit integer keys
+  @param  name  Name of the hash table [symbol]
+*/
+#define KHASH_SET_INIT_INT64(name)                                      \
+  KHASH_INIT(name, khint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)
+
+/*! @function
+  @abstract     Instantiate a hash map containing 64-bit integer keys
+  @param  name  Name of the hash table [symbol]
+  @param  khval_t  Type of values [type]
+*/
+#define KHASH_MAP_INIT_INT64(name, khval_t)                             \
+  KHASH_INIT(name, khint64_t, khval_t, 1, kh_int64_hash_func, kh_int64_hash_equal)
+
+typedef const char *kh_cstr_t;
+/*! @function
+  @abstract     Instantiate a hash map containing const char* keys
+  @param  name  Name of the hash table [symbol]
+*/
+#define KHASH_SET_INIT_STR(name)                                        \
+  KHASH_INIT(name, kh_cstr_t, char, 0, kh_str_hash_func, kh_str_hash_equal)
+
+/*! @function
+  @abstract     Instantiate a hash map containing const char* keys
+  @param  name  Name of the hash table [symbol]
+  @param  khval_t  Type of values [type]
+*/
+#define KHASH_MAP_INIT_STR(name, khval_t)                               \
+  KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)
+
+#endif /* __AC_KHASH_H */

libfuse/lib/lfmp.h

@@ -0,0 +1,243 @@
+/*
+  ISC License
+
+  Copyright (c) 2020, Antonio SJ Musumeci <trapexit@spawn.link>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#pragma once
+
+#include "fmp.h"
+
+#include <pthread.h>
+
+
+typedef struct lfmp_t lfmp_t;
+struct lfmp_t
+{
+  fmp_t fmp;
+  pthread_mutex_t lock;
+};
+
+
+static
+inline
+void
+lfmp_init(lfmp_t         *lfmp_,
+          const uint64_t  obj_size_,
+          const uint64_t  page_multiple_)
+{
+  fmp_init(&lfmp_->fmp,obj_size_,page_multiple_);
+  pthread_mutex_init(&lfmp_->lock,NULL);
+}
+
+static
+inline
+void
+lfmp_lock(lfmp_t *lfmp_)
+{
+  pthread_mutex_lock(&lfmp_->lock);
+}
+
+static
+inline
+void
+lfmp_unlock(lfmp_t *lfmp_)
+{
+  pthread_mutex_unlock(&lfmp_->lock);
+}
+
+static
+inline
+uint64_t
+lfmp_slab_count(lfmp_t *lfmp_)
+{
+  uint64_t rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_slab_count(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+int
+lfmp_slab_alloc(lfmp_t *lfmp_)
+{
+  int rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_slab_alloc(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+void*
+lfmp_alloc(lfmp_t *lfmp_)
+{
+  void *rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_alloc(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+void*
+lfmp_calloc(lfmp_t *lfmp_)
+{
+  void *rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_calloc(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+void
+lfmp_free(lfmp_t *lfmp_,
+          void   *obj_)
+{
+  pthread_mutex_lock(&lfmp_->lock);
+  fmp_free(&lfmp_->fmp,obj_);
+  pthread_mutex_unlock(&lfmp_->lock);
+}
+
+static
+inline
+void
+lfmp_clear(lfmp_t *lfmp_)
+{
+  pthread_mutex_lock(&lfmp_->lock);
+  fmp_clear(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+}
+
+static
+inline
+void
+lfmp_destroy(lfmp_t *lfmp_)
+{
+  pthread_mutex_lock(&lfmp_->lock);
+  fmp_destroy(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+  pthread_mutex_destroy(&lfmp_->lock);
+}
+
+static
+inline
+uint64_t
+lfmp_avail_objs(lfmp_t *lfmp_)
+{
+  uint64_t rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_avail_objs(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+uint64_t
+lfmp_objs_in_slab(lfmp_t *lfmp_,
+                  void   *slab_)
+{
+  uint64_t rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_objs_in_slab(&lfmp_->fmp,slab_);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+void
+lfmp_remove_objs_in_slab(lfmp_t *lfmp_,
+                         void   *slab_)
+{
+  pthread_mutex_lock(&lfmp_->lock);
+  fmp_remove_objs_in_slab(&lfmp_->fmp,slab_);
+  pthread_mutex_unlock(&lfmp_->lock);
+}
+
+static
+inline
+int
+lfmp_gc(lfmp_t *lfmp_)
+{
+  int rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_gc(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+uint64_t
+lfmp_objs_per_slab(lfmp_t *lfmp_)
+{
+  uint64_t rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_objs_per_slab(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+double
+lfmp_slab_usage_ratio(lfmp_t *lfmp_)
+{
+  double rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_slab_usage_ratio(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}
+
+static
+inline
+uint64_t
+lfmp_total_allocated_memory(lfmp_t *lfmp_)
+{
+  uint64_t rv;
+
+  pthread_mutex_lock(&lfmp_->lock);
+  rv = fmp_total_allocated_memory(&lfmp_->fmp);
+  pthread_mutex_unlock(&lfmp_->lock);
+
+  return rv;
+}

libfuse/lib/mount_bsd.c

@@ -28,364 +28,297 @@
 #define FUSE_DEV_TRUNK		"/dev/fuse"
 
 enum {
-	KEY_ALLOW_ROOT,
-	KEY_RO,
-	KEY_HELP,
-	KEY_VERSION,
-	KEY_KERN
+  KEY_RO,
+  KEY_HELP,
+  KEY_VERSION,
+  KEY_KERN
 };
 
 struct mount_opts {
-	int allow_other;
-	int allow_root;
-	int ishelp;
-	char *kernel_opts;
+  int allow_other;
+  int ishelp;
+  char *kernel_opts;
 };
 
 #define FUSE_DUAL_OPT_KEY(templ, key) 				\
-	FUSE_OPT_KEY(templ, key), FUSE_OPT_KEY("no" templ, key)
+  FUSE_OPT_KEY(templ, key), FUSE_OPT_KEY("no" templ, key)
 
 static const struct fuse_opt fuse_mount_opts[] = {
-	{ "allow_other", offsetof(struct mount_opts, allow_other), 1 },
-	{ "allow_root", offsetof(struct mount_opts, allow_root), 1 },
-	FUSE_OPT_KEY("allow_root",		KEY_ALLOW_ROOT),
-	FUSE_OPT_KEY("-r",			KEY_RO),
-	FUSE_OPT_KEY("-h",			KEY_HELP),
-	FUSE_OPT_KEY("--help",			KEY_HELP),
-	FUSE_OPT_KEY("-V",			KEY_VERSION),
-	FUSE_OPT_KEY("--version",		KEY_VERSION),
-	/* standard FreeBSD mount options */
-	FUSE_DUAL_OPT_KEY("dev",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("async",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("atime",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("dev",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("exec",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("suid",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("symfollow",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("rdonly",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("sync",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("union",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("userquota",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("groupquota",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("clusterr",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("clusterw",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("suiddir",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("snapshot",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("multilabel",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("acls",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("force",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("update",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("ro",			KEY_KERN),
-	FUSE_DUAL_OPT_KEY("rw",			KEY_KERN),
-	FUSE_DUAL_OPT_KEY("auto",		KEY_KERN),
-	/* options supported under both Linux and FBSD */
-	FUSE_DUAL_OPT_KEY("allow_other",	KEY_KERN),
-	FUSE_DUAL_OPT_KEY("default_permissions",KEY_KERN),
-	FUSE_OPT_KEY("max_read=",		KEY_KERN),
-	FUSE_OPT_KEY("subtype=",		KEY_KERN),
-	/* FBSD FUSE specific mount options */
-	FUSE_DUAL_OPT_KEY("private",		KEY_KERN),
-	FUSE_DUAL_OPT_KEY("neglect_shares",	KEY_KERN),
-	FUSE_DUAL_OPT_KEY("push_symlinks_in",	KEY_KERN),
-	FUSE_OPT_KEY("nosync_unmount",		KEY_KERN),
-	/* stock FBSD mountopt parsing routine lets anything be negated... */
-	/*
-	 * Linux specific mount options, but let just the mount util
-	 * handle them
-	 */
-	FUSE_OPT_KEY("fsname=",			KEY_KERN),
-	FUSE_OPT_KEY("nonempty",		KEY_KERN),
-	FUSE_OPT_KEY("large_read",		KEY_KERN),
-	FUSE_OPT_END
+  { "allow_other", offsetof(struct mount_opts, allow_other), 1 },
+  FUSE_OPT_KEY("-r",			KEY_RO),
+  FUSE_OPT_KEY("-h",			KEY_HELP),
+  FUSE_OPT_KEY("--help",			KEY_HELP),
+  FUSE_OPT_KEY("-V",			KEY_VERSION),
+  FUSE_OPT_KEY("--version",		KEY_VERSION),
+  /* standard FreeBSD mount options */
+  FUSE_DUAL_OPT_KEY("dev",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("async",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("atime",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("dev",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("exec",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("suid",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("symfollow",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("rdonly",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("sync",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("union",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("userquota",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("groupquota",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("clusterr",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("clusterw",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("suiddir",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("snapshot",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("multilabel",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("acls",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("force",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("update",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("ro",			KEY_KERN),
+  FUSE_DUAL_OPT_KEY("rw",			KEY_KERN),
+  FUSE_DUAL_OPT_KEY("auto",		KEY_KERN),
+  /* options supported under both Linux and FBSD */
+  FUSE_DUAL_OPT_KEY("allow_other",	KEY_KERN),
+  FUSE_DUAL_OPT_KEY("default_permissions",KEY_KERN),
+  FUSE_OPT_KEY("max_read=",		KEY_KERN),
+  FUSE_OPT_KEY("subtype=",		KEY_KERN),
+  /* FBSD FUSE specific mount options */
+  FUSE_DUAL_OPT_KEY("private",		KEY_KERN),
+  FUSE_DUAL_OPT_KEY("neglect_shares",	KEY_KERN),
+  FUSE_DUAL_OPT_KEY("push_symlinks_in",	KEY_KERN),
+  FUSE_OPT_KEY("nosync_unmount",		KEY_KERN),
+  /* stock FBSD mountopt parsing routine lets anything be negated... */
+  /*
+   * Linux specific mount options, but let just the mount util
+   * handle them
+   */
+  FUSE_OPT_KEY("fsname=",			KEY_KERN),
+  FUSE_OPT_KEY("large_read",		KEY_KERN),
+  FUSE_OPT_END
 };
 
 static void mount_help(void)
 {
-	fprintf(stderr,
-		"    -o allow_root          allow access to root\n"
-		);
-	system(FUSERMOUNT_PROG " --help");
-	fputc('\n', stderr);
+  system(FUSERMOUNT_PROG " --help");
+  fputc('\n', stderr);
 }
 
 static void mount_version(void)
 {
-	system(FUSERMOUNT_PROG " --version");
+  system(FUSERMOUNT_PROG " --version");
 }
 
 static int fuse_mount_opt_proc(void *data, const char *arg, int key,
 			       struct fuse_args *outargs)
 {
-	struct mount_opts *mo = data;
+  struct mount_opts *mo = data;
 
-	switch (key) {
-	case KEY_ALLOW_ROOT:
-		if (fuse_opt_add_opt(&mo->kernel_opts, "allow_other") == -1 ||
-		    fuse_opt_add_arg(outargs, "-oallow_root") == -1)
-			return -1;
-		return 0;
+  switch (key) {
+  case KEY_RO:
+    arg = "ro";
+    /* fall through */
 
-	case KEY_RO:
-		arg = "ro";
-		/* fall through */
+  case KEY_KERN:
+    return fuse_opt_add_opt(&mo->kernel_opts, arg);
 
-	case KEY_KERN:
-		return fuse_opt_add_opt(&mo->kernel_opts, arg);
+  case KEY_HELP:
+    mount_help();
+    mo->ishelp = 1;
+    break;
 
-	case KEY_HELP:
-		mount_help();
-		mo->ishelp = 1;
-		break;
-
-	case KEY_VERSION:
-		mount_version();
-		mo->ishelp = 1;
-		break;
-	}
-	return 1;
-}
-
-void fuse_unmount_compat22(const char *mountpoint)
-{
-	char dev[128];
-	char *ssc, *umount_cmd;
-	FILE *sf;
-	int rv;
-	char seekscript[] =
-		/* error message is annoying in help output */
-		"exec 2>/dev/null; "
-		"/usr/bin/fstat " FUSE_DEV_TRUNK "* | "
-		"/usr/bin/awk 'BEGIN{ getline; if (! ($3 == \"PID\" && $10 == \"NAME\")) exit 1; }; "
-		"              { if ($3 == %d) print $10; }' | "
-		"/usr/bin/sort | "
-		"/usr/bin/uniq | "
-		"/usr/bin/awk '{ i += 1; if (i > 1){ exit 1; }; printf; }; END{ if (i == 0) exit 1; }'";
-
-	(void) mountpoint;
-
-	/*
-	 * If we don't know the fd, we have to resort to the scripted
-	 * solution -- iterating over the fd-s is unpractical, as we
-	 * don't know how many of open files we have. (This could be
-	 * looked up in procfs -- however, that's optional on FBSD; or
-	 * read out from the kmem -- however, that's bound to
-	 * privileges (in fact, that's what happens when we call the
-	 * setgid kmem fstat(1) utility).
-	 */
-	if (asprintf(&ssc, seekscript, getpid()) == -1)
-		return;
-
-	errno = 0;
-	sf = popen(ssc, "r");
-	free(ssc);
-	if (! sf)
-		return;
-
-	fgets(dev, sizeof(dev), sf);
-	rv = pclose(sf);
-	if (rv)
-		return;
-
-	if (asprintf(&umount_cmd, "/sbin/umount %s", dev) == -1)
-		return;
-	system(umount_cmd);
-	free(umount_cmd);
+  case KEY_VERSION:
+    mount_version();
+    mo->ishelp = 1;
+    break;
+  }
+  return 1;
 }
 
 static void do_unmount(char *dev, int fd)
 {
-	char device_path[SPECNAMELEN + 12];
-	const char *argv[4];
-	const char umount_cmd[] = "/sbin/umount";
-	pid_t pid;
+  char device_path[SPECNAMELEN + 12];
+  const char *argv[4];
+  const char umount_cmd[] = "/sbin/umount";
+  pid_t pid;
 
-	snprintf(device_path, SPECNAMELEN + 12, _PATH_DEV "%s", dev);
+  snprintf(device_path, SPECNAMELEN + 12, _PATH_DEV "%s", dev);
 
-	argv[0] = umount_cmd;
-	argv[1] = "-f";
-	argv[2] = device_path;
-	argv[3] = NULL;
+  argv[0] = umount_cmd;
+  argv[1] = "-f";
+  argv[2] = device_path;
+  argv[3] = NULL;
 
-	pid = fork();
+  pid = fork();
 
-	if (pid == -1)
-		return;
+  if (pid == -1)
+    return;
 
-	if (pid == 0) {
-		close(fd);
-		execvp(umount_cmd, (char **)argv);
-		exit(1);
-	}
+  if (pid == 0) {
+    close(fd);
+    execvp(umount_cmd, (char **)argv);
+    exit(1);
+  }
 
-	waitpid(pid, NULL, 0);
+  waitpid(pid, NULL, 0);
 }
 
 void fuse_kern_unmount(const char *mountpoint, int fd)
 {
-	char *ep, dev[128];
-	struct stat sbuf;
+  char *ep, dev[128];
+  struct stat sbuf;
 
-	(void)mountpoint;
+  (void)mountpoint;
 
-	if (fstat(fd, &sbuf) == -1)
-		goto out;
+  if (fstat(fd, &sbuf) == -1)
+    goto out;
 
-	devname_r(sbuf.st_rdev, S_IFCHR, dev, 128);
+  devname_r(sbuf.st_rdev, S_IFCHR, dev, 128);
 
-	if (strncmp(dev, "fuse", 4))
-		goto out;
+  if (strncmp(dev, "fuse", 4))
+    goto out;
 
-	strtol(dev + 4, &ep, 10);
-	if (*ep != '\0')
-		goto out;
+  strtol(dev + 4, &ep, 10);
+  if (*ep != '\0')
+    goto out;
 
-	do_unmount(dev, fd);
+  do_unmount(dev, fd);
 
-out:
-	close(fd);
+ out:
+  close(fd);
 }
 
 /* Check if kernel is doing init in background */
 static int init_backgrounded(void)
 {
-	unsigned ibg, len;
+  unsigned ibg, len;
 
-	len = sizeof(ibg);
+  len = sizeof(ibg);
 
-	if (sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
-		return 0;
+  if (sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
+    return 0;
 
-	return ibg;
+  return ibg;
 }
 
 
 static int fuse_mount_core(const char *mountpoint, const char *opts)
 {
-	const char *mountprog = FUSERMOUNT_PROG;
-	int fd;
-	char *fdnam, *dev;
-	pid_t pid, cpid;
-	int status;
+  const char *mountprog = FUSERMOUNT_PROG;
+  int fd;
+  char *fdnam, *dev;
+  pid_t pid, cpid;
+  int status;
 
-	fdnam = getenv("FUSE_DEV_FD");
+  fdnam = getenv("FUSE_DEV_FD");
 
-	if (fdnam) {
-		char *ep;
+  if (fdnam) {
+    char *ep;
 
-		fd = strtol(fdnam, &ep, 10);
+    fd = strtol(fdnam, &ep, 10);
 
-		if (*ep != '\0') {
-			fprintf(stderr, "invalid value given in FUSE_DEV_FD\n");
-			return -1;
-		}
+    if (*ep != '\0') {
+      fprintf(stderr, "invalid value given in FUSE_DEV_FD\n");
+      return -1;
+    }
 
-		if (fd < 0)
-			return -1;
+    if (fd < 0)
+      return -1;
 
-		goto mount;
-	}
+    goto mount;
+  }
 
-	dev = getenv("FUSE_DEV_NAME");
+  dev = getenv("FUSE_DEV_NAME");
 
-	if (! dev)
-		dev = (char *)FUSE_DEV_TRUNK;
+  if (! dev)
+    dev = (char *)FUSE_DEV_TRUNK;
 
-	if ((fd = open(dev, O_RDWR)) < 0) {
-		perror("fuse: failed to open fuse device");
-		return -1;
-	}
+  if ((fd = open(dev, O_RDWR)) < 0) {
+    perror("fuse: failed to open fuse device");
+    return -1;
+  }
 
-mount:
-	if (getenv("FUSE_NO_MOUNT") || ! mountpoint)
-		goto out;
+ mount:
+  if (getenv("FUSE_NO_MOUNT") || ! mountpoint)
+    goto out;
 
-	pid = fork();
-	cpid = pid;
+  pid = fork();
+  cpid = pid;
 
-	if (pid == -1) {
-		perror("fuse: fork() failed");
-		close(fd);
-		return -1;
-	}
+  if (pid == -1) {
+    perror("fuse: fork() failed");
+    close(fd);
+    return -1;
+  }
 
-	if (pid == 0) {
-		if (! init_backgrounded()) {
-			/*
-			 * If init is not backgrounded, we have to
-			 * call the mount util backgrounded, to avoid
-			 * deadlock.
-			 */
+  if (pid == 0) {
+    if (! init_backgrounded()) {
+      /*
+       * If init is not backgrounded, we have to
+       * call the mount util backgrounded, to avoid
+       * deadlock.
+       */
 
-			pid = fork();
+      pid = fork();
 
-			if (pid == -1) {
-				perror("fuse: fork() failed");
-				close(fd);
-				exit(1);
-			}
-		}
+      if (pid == -1) {
+        perror("fuse: fork() failed");
+        close(fd);
+        exit(1);
+      }
+    }
 
-		if (pid == 0) {
-			const char *argv[32];
-			int a = 0;
+    if (pid == 0) {
+      const char *argv[32];
+      int a = 0;
 
-			if (! fdnam && asprintf(&fdnam, "%d", fd) == -1) {
-				perror("fuse: failed to assemble mount arguments");
-				exit(1);
-			}
+      if (! fdnam && asprintf(&fdnam, "%d", fd) == -1) {
+        perror("fuse: failed to assemble mount arguments");
+        exit(1);
+      }
 
-			argv[a++] = mountprog;
-			if (opts) {
-				argv[a++] = "-o";
-				argv[a++] = opts;
-			}
-			argv[a++] = fdnam;
-			argv[a++] = mountpoint;
-			argv[a++] = NULL;
-			execvp(mountprog, (char **) argv);
-			perror("fuse: failed to exec mount program");
-			exit(1);
-		}
+      argv[a++] = mountprog;
+      if (opts) {
+        argv[a++] = "-o";
+        argv[a++] = opts;
+      }
+      argv[a++] = fdnam;
+      argv[a++] = mountpoint;
+      argv[a++] = NULL;
+      execvp(mountprog, (char **) argv);
+      perror("fuse: failed to exec mount program");
+      exit(1);
+    }
 
-		exit(0);
-	}
+    exit(0);
+  }
 
-	if (waitpid(cpid, &status, 0) == -1 || WEXITSTATUS(status) != 0) {
-		perror("fuse: failed to mount file system");
-		close(fd);
-		return -1;
-	}
+  if (waitpid(cpid, &status, 0) == -1 || WEXITSTATUS(status) != 0) {
+    perror("fuse: failed to mount file system");
+    close(fd);
+    return -1;
+  }
 
-out:
-	return fd;
+ out:
+  return fd;
 }
 
 int fuse_kern_mount(const char *mountpoint, struct fuse_args *args)
 {
-	struct mount_opts mo;
-	int res = -1;
+  struct mount_opts mo;
+  int res = -1;
 
-	memset(&mo, 0, sizeof(mo));
-	/* mount util should not try to spawn the daemon */
-	setenv("MOUNT_FUSEFS_SAFE", "1", 1);
-	/* to notify the mount util it's called from lib */
-	setenv("MOUNT_FUSEFS_CALL_BY_LIB", "1", 1);
+  memset(&mo, 0, sizeof(mo));
+  /* mount util should not try to spawn the daemon */
+  setenv("MOUNT_FUSEFS_SAFE", "1", 1);
+  /* to notify the mount util it's called from lib */
+  setenv("MOUNT_FUSEFS_CALL_BY_LIB", "1", 1);
 
-	if (args &&
-	    fuse_opt_parse(args, &mo, fuse_mount_opts, fuse_mount_opt_proc) == -1)
-		return -1;
+  if (args &&
+      fuse_opt_parse(args, &mo, fuse_mount_opts, fuse_mount_opt_proc) == -1)
+    return -1;
 
-	if (mo.allow_other && mo.allow_root) {
-		fprintf(stderr, "fuse: 'allow_other' and 'allow_root' options are mutually exclusive\n");
-		goto out;
-	}
-	if (mo.ishelp)
-		return 0;
+  if (mo.ishelp)
+    return 0;
 
-	res = fuse_mount_core(mountpoint, mo.kernel_opts);
-out:
-	free(mo.kernel_opts);
-	return res;
+  res = fuse_mount_core(mountpoint, mo.kernel_opts);
+ out:
+  free(mo.kernel_opts);
+  return res;
 }
-
-FUSE_SYMVER(".symver fuse_unmount_compat22,fuse_unmount@FUSE_2.2");

libfuse/lib/mount_util.c

@@ -31,333 +31,300 @@
 #else
 static int mtab_needs_update(const char *mnt)
 {
-	int res;
-	struct stat stbuf;
+  int res;
+  struct stat stbuf;
 
-	/* If mtab is within new mount, don't touch it */
-	if (strncmp(mnt, _PATH_MOUNTED, strlen(mnt)) == 0 &&
-	    _PATH_MOUNTED[strlen(mnt)] == '/')
-		return 0;
+  /* If mtab is within new mount, don't touch it */
+  if (strncmp(mnt, _PATH_MOUNTED, strlen(mnt)) == 0 &&
+      _PATH_MOUNTED[strlen(mnt)] == '/')
+    return 0;
 
-	/*
-	 * Skip mtab update if /etc/mtab:
-	 *
-	 *  - doesn't exist,
-	 *  - is a symlink,
-	 *  - is on a read-only filesystem.
-	 */
-	res = lstat(_PATH_MOUNTED, &stbuf);
-	if (res == -1) {
-		if (errno == ENOENT)
-			return 0;
-	} else {
-		uid_t ruid;
-		int err;
+  /*
+   * Skip mtab update if /etc/mtab:
+   *
+   *  - doesn't exist,
+   *  - is a symlink,
+   *  - is on a read-only filesystem.
+   */
+  res = lstat(_PATH_MOUNTED, &stbuf);
+  if (res == -1) {
+    if (errno == ENOENT)
+      return 0;
+  } else {
+    uid_t ruid;
+    int err;
 
-		if (S_ISLNK(stbuf.st_mode))
-			return 0;
+    if (S_ISLNK(stbuf.st_mode))
+      return 0;
 
-		ruid = getuid();
-		if (ruid != 0)
-			setreuid(0, -1);
+    ruid = getuid();
+    if (ruid != 0)
+      setreuid(0, -1);
 
-		res = access(_PATH_MOUNTED, W_OK);
-		err = (res == -1) ? errno : 0;
-		if (ruid != 0)
-			setreuid(ruid, -1);
+    res = access(_PATH_MOUNTED, W_OK);
+    err = (res == -1) ? errno : 0;
+    if (ruid != 0)
+      setreuid(ruid, -1);
 
-		if (err == EROFS)
-			return 0;
-	}
+    if (err == EROFS)
+      return 0;
+  }
 
-	return 1;
+  return 1;
 }
 #endif /* __NetBSD__ */
 
 static int add_mount(const char *progname, const char *fsname,
-		       const char *mnt, const char *type, const char *opts)
+                     const char *mnt, const char *type, const char *opts)
 {
-	int res;
-	int status;
-	sigset_t blockmask;
-	sigset_t oldmask;
+  int res;
+  int status;
+  sigset_t blockmask;
+  sigset_t oldmask;
 
-	sigemptyset(&blockmask);
-	sigaddset(&blockmask, SIGCHLD);
-	res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
-	if (res == -1) {
-		fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
-		return -1;
-	}
+  sigemptyset(&blockmask);
+  sigaddset(&blockmask, SIGCHLD);
+  res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
+  if (res == -1) {
+    fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
+    return -1;
+  }
 
-	res = fork();
-	if (res == -1) {
-		fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
-		goto out_restore;
-	}
-	if (res == 0) {
-		char *env = NULL;
+  res = fork();
+  if (res == -1) {
+    fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
+    goto out_restore;
+  }
+  if (res == 0) {
+    char *env = NULL;
 
-		sigprocmask(SIG_SETMASK, &oldmask, NULL);
-		setuid(geteuid());
-		execle("/bin/mount", "/bin/mount", "--no-canonicalize", "-i",
-		       "-f", "-t", type, "-o", opts, fsname, mnt, NULL, &env);
-		fprintf(stderr, "%s: failed to execute /bin/mount: %s\n",
-			progname, strerror(errno));
-		exit(1);
-	}
-	res = waitpid(res, &status, 0);
-	if (res == -1)
-		fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
+    sigprocmask(SIG_SETMASK, &oldmask, NULL);
+    setuid(geteuid());
+    execle("/bin/mount", "/bin/mount", "--no-canonicalize", "-i",
+           "-f", "-t", type, "-o", opts, fsname, mnt, NULL, &env);
+    fprintf(stderr, "%s: failed to execute /bin/mount: %s\n",
+            progname, strerror(errno));
+    exit(1);
+  }
+  res = waitpid(res, &status, 0);
+  if (res == -1)
+    fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
 
-	if (status != 0)
-		res = -1;
+  if (status != 0)
+    res = -1;
 
  out_restore:
-	sigprocmask(SIG_SETMASK, &oldmask, NULL);
+  sigprocmask(SIG_SETMASK, &oldmask, NULL);
 
-	return res;
+  return res;
 }
 
 int fuse_mnt_add_mount(const char *progname, const char *fsname,
 		       const char *mnt, const char *type, const char *opts)
 {
-	if (!mtab_needs_update(mnt))
-		return 0;
+  if (!mtab_needs_update(mnt))
+    return 0;
 
-	return add_mount(progname, fsname, mnt, type, opts);
+  return add_mount(progname, fsname, mnt, type, opts);
 }
 
 static int exec_umount(const char *progname, const char *rel_mnt, int lazy)
 {
-	int res;
-	int status;
-	sigset_t blockmask;
-	sigset_t oldmask;
+  int res;
+  int status;
+  sigset_t blockmask;
+  sigset_t oldmask;
 
-	sigemptyset(&blockmask);
-	sigaddset(&blockmask, SIGCHLD);
-	res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
-	if (res == -1) {
-		fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
-		return -1;
-	}
+  sigemptyset(&blockmask);
+  sigaddset(&blockmask, SIGCHLD);
+  res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
+  if (res == -1) {
+    fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
+    return -1;
+  }
 
-	res = fork();
-	if (res == -1) {
-		fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
-		goto out_restore;
-	}
-	if (res == 0) {
-		char *env = NULL;
+  res = fork();
+  if (res == -1) {
+    fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
+    goto out_restore;
+  }
+  if (res == 0) {
+    char *env = NULL;
 
-		sigprocmask(SIG_SETMASK, &oldmask, NULL);
-		setuid(geteuid());
-		if (lazy) {
-			execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
-			       "-l", NULL, &env);
-		} else {
-			execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
-			       NULL, &env);
-		}
-		fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
-			progname, strerror(errno));
-		exit(1);
-	}
-	res = waitpid(res, &status, 0);
-	if (res == -1)
-		fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
+    sigprocmask(SIG_SETMASK, &oldmask, NULL);
+    setuid(geteuid());
+    if (lazy) {
+      execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
+             "-l", NULL, &env);
+    } else {
+      execle("/bin/umount", "/bin/umount", "-i", rel_mnt,
+             NULL, &env);
+    }
+    fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
+            progname, strerror(errno));
+    exit(1);
+  }
+  res = waitpid(res, &status, 0);
+  if (res == -1)
+    fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
 
-	if (status != 0) {
-		res = -1;
-	}
+  if (status != 0) {
+    res = -1;
+  }
 
  out_restore:
-	sigprocmask(SIG_SETMASK, &oldmask, NULL);
-	return res;
+  sigprocmask(SIG_SETMASK, &oldmask, NULL);
+  return res;
 
 }
 
 int fuse_mnt_umount(const char *progname, const char *abs_mnt,
 		    const char *rel_mnt, int lazy)
 {
-	int res;
+  int res;
 
-	if (!mtab_needs_update(abs_mnt)) {
-		res = umount2(rel_mnt, lazy ? 2 : 0);
-		if (res == -1)
-			fprintf(stderr, "%s: failed to unmount %s: %s\n",
-				progname, abs_mnt, strerror(errno));
-		return res;
-	}
+  if (!mtab_needs_update(abs_mnt)) {
+    res = umount2(rel_mnt, lazy ? 2 : 0);
+    if (res == -1)
+      fprintf(stderr, "%s: failed to unmount %s: %s\n",
+              progname, abs_mnt, strerror(errno));
+    return res;
+  }
 
-	return exec_umount(progname, rel_mnt, lazy);
+  return exec_umount(progname, rel_mnt, lazy);
 }
 
 static int remove_mount(const char *progname, const char *mnt)
 {
-	int res;
-	int status;
-	sigset_t blockmask;
-	sigset_t oldmask;
+  int res;
+  int status;
+  sigset_t blockmask;
+  sigset_t oldmask;
 
-	sigemptyset(&blockmask);
-	sigaddset(&blockmask, SIGCHLD);
-	res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
-	if (res == -1) {
-		fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
-		return -1;
-	}
+  sigemptyset(&blockmask);
+  sigaddset(&blockmask, SIGCHLD);
+  res = sigprocmask(SIG_BLOCK, &blockmask, &oldmask);
+  if (res == -1) {
+    fprintf(stderr, "%s: sigprocmask: %s\n", progname, strerror(errno));
+    return -1;
+  }
 
-	res = fork();
-	if (res == -1) {
-		fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
-		goto out_restore;
-	}
-	if (res == 0) {
-		char *env = NULL;
+  res = fork();
+  if (res == -1) {
+    fprintf(stderr, "%s: fork: %s\n", progname, strerror(errno));
+    goto out_restore;
+  }
+  if (res == 0) {
+    char *env = NULL;
 
-		sigprocmask(SIG_SETMASK, &oldmask, NULL);
-		setuid(geteuid());
-		execle("/bin/umount", "/bin/umount", "--no-canonicalize", "-i",
-		       "--fake", mnt, NULL, &env);
-		fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
-			progname, strerror(errno));
-		exit(1);
-	}
-	res = waitpid(res, &status, 0);
-	if (res == -1)
-		fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
+    sigprocmask(SIG_SETMASK, &oldmask, NULL);
+    setuid(geteuid());
+    execle("/bin/umount", "/bin/umount", "--no-canonicalize", "-i",
+           "--fake", mnt, NULL, &env);
+    fprintf(stderr, "%s: failed to execute /bin/umount: %s\n",
+            progname, strerror(errno));
+    exit(1);
+  }
+  res = waitpid(res, &status, 0);
+  if (res == -1)
+    fprintf(stderr, "%s: waitpid: %s\n", progname, strerror(errno));
 
-	if (status != 0)
-		res = -1;
+  if (status != 0)
+    res = -1;
 
  out_restore:
-	sigprocmask(SIG_SETMASK, &oldmask, NULL);
-	return res;
+  sigprocmask(SIG_SETMASK, &oldmask, NULL);
+  return res;
 }
 
 int fuse_mnt_remove_mount(const char *progname, const char *mnt)
 {
-	if (!mtab_needs_update(mnt))
-		return 0;
+  if (!mtab_needs_update(mnt))
+    return 0;
 
-	return remove_mount(progname, mnt);
+  return remove_mount(progname, mnt);
 }
 
 char *fuse_mnt_resolve_path(const char *progname, const char *orig)
 {
-	char buf[PATH_MAX];
-	char *copy;
-	char *dst;
-	char *end;
-	char *lastcomp;
-	const char *toresolv;
+  char buf[PATH_MAX];
+  char *copy;
+  char *dst;
+  char *end;
+  char *lastcomp;
+  const char *toresolv;
 
-	if (!orig[0]) {
-		fprintf(stderr, "%s: invalid mountpoint '%s'\n", progname,
-			orig);
-		return NULL;
-	}
+  if (!orig[0]) {
+    fprintf(stderr, "%s: invalid mountpoint '%s'\n", progname,
+            orig);
+    return NULL;
+  }
 
-	copy = strdup(orig);
-	if (copy == NULL) {
-		fprintf(stderr, "%s: failed to allocate memory\n", progname);
-		return NULL;
-	}
+  copy = strdup(orig);
+  if (copy == NULL) {
+    fprintf(stderr, "%s: failed to allocate memory\n", progname);
+    return NULL;
+  }
 
-	toresolv = copy;
-	lastcomp = NULL;
-	for (end = copy + strlen(copy) - 1; end > copy && *end == '/'; end --);
-	if (end[0] != '/') {
-		char *tmp;
-		end[1] = '\0';
-		tmp = strrchr(copy, '/');
-		if (tmp == NULL) {
-			lastcomp = copy;
-			toresolv = ".";
-		} else {
-			lastcomp = tmp + 1;
-			if (tmp == copy)
-				toresolv = "/";
-		}
-		if (strcmp(lastcomp, ".") == 0 || strcmp(lastcomp, "..") == 0) {
-			lastcomp = NULL;
-			toresolv = copy;
-		}
-		else if (tmp)
-			tmp[0] = '\0';
-	}
-	if (realpath(toresolv, buf) == NULL) {
-		fprintf(stderr, "%s: bad mount point %s: %s\n", progname, orig,
-			strerror(errno));
-		free(copy);
-		return NULL;
-	}
-	if (lastcomp == NULL)
-		dst = strdup(buf);
-	else {
-		dst = (char *) malloc(strlen(buf) + 1 + strlen(lastcomp) + 1);
-		if (dst) {
-			unsigned buflen = strlen(buf);
-			if (buflen && buf[buflen-1] == '/')
-				sprintf(dst, "%s%s", buf, lastcomp);
-			else
-				sprintf(dst, "%s/%s", buf, lastcomp);
-		}
-	}
-	free(copy);
-	if (dst == NULL)
-		fprintf(stderr, "%s: failed to allocate memory\n", progname);
-	return dst;
-}
-
-int fuse_mnt_check_empty(const char *progname, const char *mnt,
-			 mode_t rootmode, off_t rootsize)
-{
-	int isempty = 1;
-
-	if (S_ISDIR(rootmode)) {
-		struct dirent *ent;
-		DIR *dp = opendir(mnt);
-		if (dp == NULL) {
-			fprintf(stderr,
-				"%s: failed to open mountpoint for reading: %s\n",
-				progname, strerror(errno));
-			return -1;
-		}
-		while ((ent = readdir(dp)) != NULL) {
-			if (strcmp(ent->d_name, ".") != 0 &&
-			    strcmp(ent->d_name, "..") != 0) {
-				isempty = 0;
-				break;
-			}
-		}
-		closedir(dp);
-	} else if (rootsize)
-		isempty = 0;
-
-	if (!isempty) {
-		fprintf(stderr, "%s: mountpoint is not empty\n", progname);
-		fprintf(stderr, "%s: if you are sure this is safe, use the 'nonempty' mount option\n", progname);
-		return -1;
-	}
-	return 0;
+  toresolv = copy;
+  lastcomp = NULL;
+  for (end = copy + strlen(copy) - 1; end > copy && *end == '/'; end --);
+  if (end[0] != '/') {
+    char *tmp;
+    end[1] = '\0';
+    tmp = strrchr(copy, '/');
+    if (tmp == NULL) {
+      lastcomp = copy;
+      toresolv = ".";
+    } else {
+      lastcomp = tmp + 1;
+      if (tmp == copy)
+        toresolv = "/";
+    }
+    if (strcmp(lastcomp, ".") == 0 || strcmp(lastcomp, "..") == 0) {
+      lastcomp = NULL;
+      toresolv = copy;
+    }
+    else if (tmp)
+      tmp[0] = '\0';
+  }
+  if (realpath(toresolv, buf) == NULL) {
+    fprintf(stderr, "%s: bad mount point %s: %s\n", progname, orig,
+            strerror(errno));
+    free(copy);
+    return NULL;
+  }
+  if (lastcomp == NULL)
+    dst = strdup(buf);
+  else {
+    dst = (char *) malloc(strlen(buf) + 1 + strlen(lastcomp) + 1);
+    if (dst) {
+      unsigned buflen = strlen(buf);
+      if (buflen && buf[buflen-1] == '/')
+        sprintf(dst, "%s%s", buf, lastcomp);
+      else
+        sprintf(dst, "%s/%s", buf, lastcomp);
+    }
+  }
+  free(copy);
+  if (dst == NULL)
+    fprintf(stderr, "%s: failed to allocate memory\n", progname);
+  return dst;
 }
 
 int fuse_mnt_check_fuseblk(void)
 {
-	char buf[256];
-	FILE *f = fopen("/proc/filesystems", "r");
-	if (!f)
-		return 1;
+  char buf[256];
+  FILE *f = fopen("/proc/filesystems", "r");
+  if (!f)
+    return 1;
 
-	while (fgets(buf, sizeof(buf), f))
-		if (strstr(buf, "fuseblk\n")) {
-			fclose(f);
-			return 1;
-		}
+  while (fgets(buf, sizeof(buf), f))
+    if (strstr(buf, "fuseblk\n")) {
+      fclose(f);
+      return 1;
+    }
 
-	fclose(f);
-	return 0;
+  fclose(f);
+  return 0;
 }

libfuse/lib/mount_util.h

@@ -6,6 +6,8 @@
   See the file COPYING.LIB.
 */
 
+#pragma once
+
 #include <sys/types.h>
 
 int fuse_mnt_add_mount(const char *progname, const char *fsname,
@@ -14,6 +16,4 @@ int fuse_mnt_remove_mount(const char *progname, const char *mnt);
 int fuse_mnt_umount(const char *progname, const char *abs_mnt,
 		    const char *rel_mnt, int lazy);
 char *fuse_mnt_resolve_path(const char *progname, const char *orig);
-int fuse_mnt_check_empty(const char *progname, const char *mnt,
-			 mode_t rootmode, off_t rootsize);
 int fuse_mnt_check_fuseblk(void);

libfuse/lib/os.cpp

@@ -0,0 +1,361 @@
+// Formatting library for C++ - optional OS-specific functionality
+//
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+// Disable bogus MSVC warnings.
+#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "fmt/os.h"
+
+#include <climits>
+
+#if FMT_USE_FCNTL
+#  include <sys/stat.h>
+#  include <sys/types.h>
+
+#  ifndef _WIN32
+#    include <unistd.h>
+#  else
+#    ifndef WIN32_LEAN_AND_MEAN
+#      define WIN32_LEAN_AND_MEAN
+#    endif
+#    include <io.h>
+
+#    ifndef S_IRUSR
+#      define S_IRUSR _S_IREAD
+#    endif
+#    ifndef S_IWUSR
+#      define S_IWUSR _S_IWRITE
+#    endif
+#    ifndef S_IRGRP
+#      define S_IRGRP 0
+#    endif
+#    ifndef S_IWGRP
+#      define S_IWGRP 0
+#    endif
+#    ifndef S_IROTH
+#      define S_IROTH 0
+#    endif
+#    ifndef S_IWOTH
+#      define S_IWOTH 0
+#    endif
+#  endif  // _WIN32
+#endif    // FMT_USE_FCNTL
+
+#ifdef _WIN32
+#  include <windows.h>
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+using rwresult = int;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#elif FMT_USE_FCNTL
+// Return type of read and write functions.
+using rwresult = ssize_t;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}  // namespace
+
+FMT_BEGIN_NAMESPACE
+
+#ifdef _WIN32
+detail::utf16_to_utf8::utf16_to_utf8(basic_string_view<wchar_t> s) {
+  if (int error_code = convert(s)) {
+    FMT_THROW(windows_error(error_code,
+                            "cannot convert string from UTF-16 to UTF-8"));
+  }
+}
+
+int detail::utf16_to_utf8::convert(basic_string_view<wchar_t> s) {
+  if (s.size() > INT_MAX) return ERROR_INVALID_PARAMETER;
+  int s_size = static_cast<int>(s.size());
+  if (s_size == 0) {
+    // WideCharToMultiByte does not support zero length, handle separately.
+    buffer_.resize(1);
+    buffer_[0] = 0;
+    return 0;
+  }
+
+  int length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, nullptr, 0,
+                                   nullptr, nullptr);
+  if (length == 0) return GetLastError();
+  buffer_.resize(length + 1);
+  length = WideCharToMultiByte(CP_UTF8, 0, s.data(), s_size, &buffer_[0],
+                               length, nullptr, nullptr);
+  if (length == 0) return GetLastError();
+  buffer_[length] = 0;
+  return 0;
+}
+
+namespace detail {
+
+class system_message {
+  system_message(const system_message&) = delete;
+  void operator=(const system_message&) = delete;
+
+  unsigned long result_;
+  wchar_t* message_;
+
+  static bool is_whitespace(wchar_t c) noexcept {
+    return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0';
+  }
+
+ public:
+  explicit system_message(unsigned long error_code)
+      : result_(0), message_(nullptr) {
+    result_ = FormatMessageW(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
+            FORMAT_MESSAGE_IGNORE_INSERTS,
+        nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        reinterpret_cast<wchar_t*>(&message_), 0, nullptr);
+    if (result_ != 0) {
+      while (result_ != 0 && is_whitespace(message_[result_ - 1])) {
+        --result_;
+      }
+    }
+  }
+  ~system_message() { LocalFree(message_); }
+  explicit operator bool() const noexcept { return result_ != 0; }
+  operator basic_string_view<wchar_t>() const noexcept {
+    return basic_string_view<wchar_t>(message_, result_);
+  }
+};
+
+class utf8_system_category final : public std::error_category {
+ public:
+  const char* name() const noexcept override { return "system"; }
+  std::string message(int error_code) const override {
+    system_message msg(error_code);
+    if (msg) {
+      utf16_to_utf8 utf8_message;
+      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
+        return utf8_message.str();
+      }
+    }
+    return "unknown error";
+  }
+};
+
+}  // namespace detail
+
+FMT_API const std::error_category& system_category() noexcept {
+  static const detail::utf8_system_category category;
+  return category;
+}
+
+std::system_error vwindows_error(int err_code, string_view format_str,
+                                 format_args args) {
+  auto ec = std::error_code(err_code, system_category());
+  return std::system_error(ec, vformat(format_str, args));
+}
+
+void detail::format_windows_error(detail::buffer<char>& out, int error_code,
+                                  const char* message) noexcept {
+  FMT_TRY {
+    system_message msg(error_code);
+    if (msg) {
+      utf16_to_utf8 utf8_message;
+      if (utf8_message.convert(msg) == ERROR_SUCCESS) {
+        fmt::format_to(buffer_appender<char>(out), "{}: {}", message, utf8_message);
+        return;
+      }
+    }
+  }
+  FMT_CATCH(...) {}
+  format_error_code(out, error_code, message);
+}
+
+void report_windows_error(int error_code, const char* message) noexcept {
+  report_error(detail::format_windows_error, error_code, message);
+}
+#endif  // _WIN32
+
+buffered_file::~buffered_file() noexcept {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())),
+                nullptr);
+  if (!file_)
+    FMT_THROW(system_error(errno, "cannot open file {}", filename.c_str()));
+}
+
+void buffered_file::close() {
+  if (!file_) return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = nullptr;
+  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
+}
+
+int buffered_file::descriptor() const {
+  int fd = FMT_POSIX_CALL(fileno(file_));
+  if (fd == -1) FMT_THROW(system_error(errno, "cannot get file descriptor"));
+  return fd;
+}
+
+#if FMT_USE_FCNTL
+file::file(cstring_view path, int oflag) {
+#  ifdef _WIN32
+  using mode_t = int;
+#  endif
+  constexpr mode_t mode =
+      S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+#  if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
+#  else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
+#  endif
+  if (fd_ == -1)
+    FMT_THROW(system_error(errno, "cannot open file {}", path.c_str()));
+}
+
+file::~file() noexcept {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    report_system_error(errno, "cannot close file");
+}
+
+void file::close() {
+  if (fd_ == -1) return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0) FMT_THROW(system_error(errno, "cannot close file"));
+}
+
+long long file::size() const {
+#  ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
+  }
+  unsigned long long long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#  else
+  using Stat = struct stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(system_error(errno, "cannot get file attributes"));
+  static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
+                "return type of file::size is not large enough");
+  return file_stat.st_size;
+#  endif
+}
+
+std::size_t file::read(void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0) FMT_THROW(system_error(errno, "cannot read from file"));
+  return detail::to_unsigned(result);
+}
+
+std::size_t file::write(const void* buffer, std::size_t count) {
+  rwresult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0) FMT_THROW(system_error(errno, "cannot write to file"));
+  return detail::to_unsigned(result);
+}
+
+file file::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {}", fd));
+  return file(new_fd);
+}
+
+void file::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(system_error(errno, "cannot duplicate file descriptor {} to {}",
+                           fd_, fd));
+  }
+}
+
+void file::dup2(int fd, std::error_code& ec) noexcept {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) ec = std::error_code(errno, std::generic_category());
+}
+
+void file::pipe(file& read_end, file& write_end) {
+  // Close the descriptors first to make sure that assignments don't throw
+  // and there are no leaks.
+  read_end.close();
+  write_end.close();
+  int fds[2] = {};
+#  ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#  else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#  endif
+  if (result != 0) FMT_THROW(system_error(errno, "cannot create pipe"));
+  // The following assignments don't throw because read_fd and write_fd
+  // are closed.
+  read_end = file(fds[0]);
+  write_end = file(fds[1]);
+}
+
+buffered_file file::fdopen(const char* mode) {
+// Don't retry as fdopen doesn't return EINTR.
+#  if defined(__MINGW32__) && defined(_POSIX_)
+  FILE* f = ::fdopen(fd_, mode);
+#  else
+  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
+#  endif
+  if (!f)
+    FMT_THROW(
+        system_error(errno, "cannot associate stream with file descriptor"));
+  buffered_file bf(f);
+  fd_ = -1;
+  return bf;
+}
+
+long getpagesize() {
+#  ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#  else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+  if (size < 0) FMT_THROW(system_error(errno, "cannot get memory page size"));
+  return size;
+#  endif
+}
+
+FMT_API void ostream::grow(size_t) {
+  if (this->size() == this->capacity()) flush();
+}
+#endif  // FMT_USE_FCNTL
+FMT_END_NAMESPACE

libfuse/lib/thread_pool.hpp

@@ -0,0 +1,125 @@
+#pragma once
+
+#include "unbounded_queue.hpp"
+#include "bounded_queue.hpp"
+
+#include <tuple>
+#include <atomic>
+#include <vector>
+#include <thread>
+#include <memory>
+#include <future>
+#include <utility>
+#include <functional>
+#include <type_traits>
+
+
+class ThreadPool
+{
+public:
+  explicit
+  ThreadPool(const std::size_t thread_count_ = std::thread::hardware_concurrency())
+    : _queues(thread_count_),
+      _count(thread_count_)
+  {
+    auto worker = [this](std::size_t i)
+    {
+      while(true)
+        {
+          Proc f;
+
+          for(std::size_t n = 0; n < (_count * K); ++n)
+            {
+              if(_queues[(i + n) % _count].try_pop(f))
+                break;
+            }
+
+          if(!f && !_queues[i].pop(f))
+            break;
+
+          f();
+        }
+    };
+
+    _threads.reserve(thread_count_);
+    for(std::size_t i = 0; i < thread_count_; ++i)
+      _threads.emplace_back(worker, i);
+  }
+
+  ~ThreadPool()
+  {
+    for(auto& queue : _queues)
+      queue.unblock();
+    for(auto& thread : _threads)
+      thread.join();
+  }
+
+  template<typename F>
+  void
+  enqueue_work(F&& f_)
+  {
+    auto i = _index++;
+
+    for(std::size_t n = 0; n < (_count * K); ++n)
+      {
+        if(_queues[(i + n) % _count].try_push(f_))
+          return;
+      }
+
+    _queues[i % _count].push(std::move(f_));
+  }
+
+  template<typename F>
+  [[nodiscard]]
+  std::future<typename std::result_of<F()>::type>
+  enqueue_task(F&& f_)
+  {
+    using TaskReturnType = typename std::result_of<F()>::type;
+    using Promise        = std::promise<TaskReturnType>;
+
+    auto i       = _index++;
+    auto promise = std::make_shared<Promise>();
+    auto future  = promise->get_future();
+    auto work    = [=]() {
+      auto rv = f_();
+      promise->set_value(rv);
+    };
+
+    for(std::size_t n = 0; n < (_count * K); ++n)
+      {
+        if(_queues[(i + n) % _count].try_push(work))
+          return future;
+      }
+
+    _queues[i % _count].push(std::move(work));
+
+    return future;
+  }
+
+public:
+  std::vector<pthread_t>
+  threads()
+  {
+    std::vector<pthread_t> rv;
+
+    for(auto &thread : _threads)
+      rv.push_back(thread.native_handle());
+
+    return rv;
+  }
+
+private:
+  using Proc   = std::function<void(void)>;
+  using Queue  = UnboundedQueue<Proc>;
+  using Queues = std::vector<Queue>;
+  Queues _queues;
+
+private:
+  std::vector<std::thread> _threads;
+
+private:
+  const std::size_t _count;
+  std::atomic_uint _index;
+
+  static const unsigned int K = 2;
+};

libfuse/lib/ulockmgr.c

@@ -1,444 +0,0 @@
-/*
-  libulockmgr: Userspace Lock Manager Library
-  Copyright (C) 2006  Miklos Szeredi <miklos@szeredi.hu>
-
-  This program can be distributed under the terms of the GNU LGPLv2.
-  See the file COPYING.LIB
-*/
-
-/* #define DEBUG 1 */
-
-#include "ulockmgr.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <pthread.h>
-#include <errno.h>
-#include <assert.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-
-struct message {
-	unsigned intr : 1;
-	unsigned nofd : 1;
-	pthread_t thr;
-	int cmd;
-	int fd;
-	struct flock lock;
-	int error;
-};
-
-struct fd_store {
-	struct fd_store *next;
-	int fd;
-	int inuse;
-};
-
-struct owner {
-	struct owner *next;
-	struct owner *prev;
-	struct fd_store *fds;
-	void *id;
-	size_t id_len;
-	int cfd;
-};
-
-static pthread_mutex_t ulockmgr_lock;
-static int ulockmgr_cfd = -1;
-static struct owner owner_list = { .next = &owner_list, .prev = &owner_list };
-
-#define MAX_SEND_FDS 2
-
-static void list_del_owner(struct owner *owner)
-{
-	struct owner *prev = owner->prev;
-	struct owner *next = owner->next;
-	prev->next = next;
-	next->prev = prev;
-}
-
-static void list_add_owner(struct owner *owner, struct owner *next)
-{
-	struct owner *prev = next->prev;
-	owner->next = next;
-	owner->prev = prev;
-	prev->next = owner;
-	next->prev = owner;
-}
-
-/*
- * There's a bug in the linux kernel (< 2.6.22) recv() implementation
- * on AF_UNIX, SOCK_STREAM sockets, that could cause it to return
- * zero, even if data was available.  Retrying the recv will return
- * the data in this case.
- */
-static int do_recv(int sock, void *buf, size_t len, int flags)
-{
-	int res = recv(sock, buf, len, flags);
-	if (res == 0)
-		res = recv(sock, buf, len, flags);
-
-	return res;
-}
-
-static int ulockmgr_send_message(int sock, void *buf, size_t buflen,
-				 int *fdp, int numfds)
-{
-	struct msghdr msg;
-	struct cmsghdr *p_cmsg;
-	struct iovec vec;
-	size_t cmsgbuf[CMSG_SPACE(sizeof(int) * MAX_SEND_FDS) / sizeof(size_t)];
-	int res;
-
-	assert(numfds <= MAX_SEND_FDS);
-	msg.msg_control = cmsgbuf;
-	msg.msg_controllen = sizeof(cmsgbuf);
-	p_cmsg = CMSG_FIRSTHDR(&msg);
-	p_cmsg->cmsg_level = SOL_SOCKET;
-	p_cmsg->cmsg_type = SCM_RIGHTS;
-	p_cmsg->cmsg_len = CMSG_LEN(sizeof(int) * numfds);
-	memcpy(CMSG_DATA(p_cmsg), fdp, sizeof(int) * numfds);
-	msg.msg_controllen = p_cmsg->cmsg_len;
-	msg.msg_name = NULL;
-	msg.msg_namelen = 0;
-	msg.msg_iov = &vec;
-	msg.msg_iovlen = 1;
-	msg.msg_flags = 0;
-	vec.iov_base = buf;
-	vec.iov_len = buflen;
-	res = sendmsg(sock, &msg, MSG_NOSIGNAL);
-	if (res == -1) {
-		perror("libulockmgr: sendmsg");
-		return -1;
-	}
-	if ((size_t) res != buflen) {
-		fprintf(stderr, "libulockmgr: sendmsg short\n");
-		return -1;
-	}
-	return 0;
-}
-
-static int ulockmgr_start_daemon(void)
-{
-	int sv[2];
-	int res;
-	char tmp[64];
-
-	res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
-	if (res == -1) {
-		perror("libulockmgr: socketpair");
-		return -1;
-	}
-	snprintf(tmp, sizeof(tmp), "exec ulockmgr_server %i", sv[0]);
-	res = system(tmp);
-	close(sv[0]);
-	if (res == -1 || !WIFEXITED(res) || WEXITSTATUS(res) != 0) {
-		close(sv[1]);
-		return -1;
-	}
-	ulockmgr_cfd = sv[1];
-	return 0;
-}
-
-static struct owner *ulockmgr_new_owner(const void *id, size_t id_len)
-{
-	int sv[2];
-	int res;
-	char c = 'm';
-	struct owner *o;
-
-	if (ulockmgr_cfd == -1 && ulockmgr_start_daemon() == -1)
-		return NULL;
-
-	o = calloc(1, sizeof(struct owner) + id_len);
-	if (!o) {
-		fprintf(stderr, "libulockmgr: failed to allocate memory\n");
-		return NULL;
-	}
-	o->id = o + 1;
-	o->id_len = id_len;
-	res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
-	if (res == -1) {
-		perror("libulockmgr: socketpair");
-		goto out_free;
-	}
-	res = ulockmgr_send_message(ulockmgr_cfd, &c, sizeof(c), &sv[0], 1);
-	close(sv[0]);
-	if (res == -1) {
-		close(ulockmgr_cfd);
-		ulockmgr_cfd = -1;
-		goto out_close;
-	}
-
-	o->cfd = sv[1];
-	memcpy(o->id, id, id_len);
-	list_add_owner(o, &owner_list);
-
-	return o;
-
-out_close:
-	close(sv[1]);
-out_free:
-	free(o);
-	return NULL;
-}
-
-static int ulockmgr_send_request(struct message *msg, const void *id,
-				 size_t id_len)
-{
-	int sv[2];
-	int cfd;
-	struct owner *o;
-	struct fd_store *f = NULL;
-	struct fd_store *newf = NULL;
-	struct fd_store **fp;
-	int fd = msg->fd;
-	int cmd = msg->cmd;
-	int res;
-	int unlockall = (cmd == F_SETLK && msg->lock.l_type == F_UNLCK &&
-			 msg->lock.l_start == 0 && msg->lock.l_len == 0);
-
-	for (o = owner_list.next; o != &owner_list; o = o->next)
-		if (o->id_len == id_len && memcmp(o->id, id, id_len) == 0)
-			break;
-
-	if (o == &owner_list)
-		o = NULL;
-
-	if (!o && cmd != F_GETLK && msg->lock.l_type != F_UNLCK)
-		o = ulockmgr_new_owner(id, id_len);
-
-	if (!o) {
-		if (cmd == F_GETLK) {
-			res = fcntl(msg->fd, F_GETLK, &msg->lock);
-			return (res == -1) ? -errno : 0;
-		} else if (msg->lock.l_type == F_UNLCK)
-			return 0;
-		else
-			return -ENOLCK;
-	}
-
-	if (unlockall)
-		msg->nofd = 1;
-	else {
-		for (fp = &o->fds; *fp; fp = &(*fp)->next) {
-			f = *fp;
-			if (f->fd == fd) {
-				msg->nofd = 1;
-				break;
-			}
-		}
-	}
-
-	if (!msg->nofd) {
-		newf = f = calloc(1, sizeof(struct fd_store));
-		if (!f) {
-			fprintf(stderr, "libulockmgr: failed to allocate memory\n");
-			return -ENOLCK;
-		}
-	}
-
-	res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
-	if (res == -1) {
-		perror("libulockmgr: socketpair");
-		free(newf);
-		return -ENOLCK;
-	}
-
-	cfd = sv[1];
-	sv[1] = msg->fd;
-	res = ulockmgr_send_message(o->cfd, msg, sizeof(struct message), sv,
-				    msg->nofd ? 1 : 2);
-	close(sv[0]);
-	if (res == -1) {
-		free(newf);
-		close(cfd);
-		return -EIO;
-	}
-
-	if (newf) {
-		newf->fd = msg->fd;
-		newf->next = o->fds;
-		o->fds = newf;
-	}
-	if (f)
-		f->inuse++;
-
-	res = do_recv(cfd, msg, sizeof(struct message), MSG_WAITALL);
-	if (res == -1) {
-		perror("libulockmgr: recv");
-		msg->error = EIO;
-	} else if (res != sizeof(struct message)) {
-		fprintf(stderr, "libulockmgr: recv short\n");
-		msg->error = EIO;
-	} else if (cmd == F_SETLKW && msg->error == EAGAIN) {
-		pthread_mutex_unlock(&ulockmgr_lock);
-		while (1) {
-			sigset_t old;
-			sigset_t unblock;
-			int errno_save;
-
-			sigemptyset(&unblock);
-			sigaddset(&unblock, SIGUSR1);
-			pthread_sigmask(SIG_UNBLOCK, &unblock, &old);
-			res = do_recv(cfd, msg, sizeof(struct message),
-				      MSG_WAITALL);
-			errno_save = errno;
-			pthread_sigmask(SIG_SETMASK, &old, NULL);
-			if (res == sizeof(struct message))
-				break;
-			else if (res >= 0) {
-				fprintf(stderr, "libulockmgr: recv short\n");
-				msg->error = EIO;
-				break;
-			} else if (errno_save != EINTR) {
-				errno = errno_save;
-				perror("libulockmgr: recv");
-				msg->error = EIO;
-				break;
-			}
-			msg->intr = 1;
-			res = send(o->cfd, msg, sizeof(struct message),
-				   MSG_NOSIGNAL);
-			if (res == -1) {
-				perror("libulockmgr: send");
-				msg->error = EIO;
-				break;
-			}
-			if (res != sizeof(struct message)) {
-				fprintf(stderr, "libulockmgr: send short\n");
-				msg->error = EIO;
-				break;
-			}
-		}
-		pthread_mutex_lock(&ulockmgr_lock);
-
-	}
-	if (f)
-		f->inuse--;
-	close(cfd);
-	if (unlockall) {
-		for (fp = &o->fds; *fp;) {
-			f = *fp;
-			if (f->fd == fd && !f->inuse) {
-				*fp = f->next;
-				free(f);
-			} else
-				fp = &f->next;
-		}
-		if (!o->fds) {
-			list_del_owner(o);
-			close(o->cfd);
-			free(o);
-		}
-		/* Force OK on unlock-all, since it _will_ succeed once the
-		   owner is deleted */
-		msg->error = 0;
-	}
-
-	return -msg->error;
-}
-
-#ifdef DEBUG
-static uint32_t owner_hash(const unsigned char *id, size_t id_len)
-{
-	uint32_t h = 0;
-	size_t i;
-	for (i = 0; i < id_len; i++)
-		h = ((h << 8) | (h >> 24)) ^ id[i];
-
-	return h;
-}
-#endif
-
-static int ulockmgr_canonicalize(int fd, struct flock *lock)
-{
-	off_t offset;
-	if (lock->l_whence == SEEK_CUR) {
-		offset = lseek(fd, 0, SEEK_CUR);
-		if (offset == (off_t) -1)
-			return -errno;
-	} else if (lock->l_whence == SEEK_END) {
-		struct stat stbuf;
-		int res = fstat(fd, &stbuf);
-		if (res == -1)
-			return -errno;
-
-		offset = stbuf.st_size;
-	} else
-		offset = 0;
-
-	lock->l_whence = SEEK_SET;
-	lock->l_start += offset;
-
-	if (lock->l_start < 0)
-		return -EINVAL;
-
-	if (lock->l_len < 0) {
-		lock->l_start += lock->l_len;
-		if (lock->l_start < 0)
-			return -EINVAL;
-		lock->l_len = -lock->l_len;
-	}
-	if (lock->l_len && lock->l_start + lock->l_len - 1 < 0)
-		return -EINVAL;
-
-	return 0;
-}
-
-int ulockmgr_op(int fd, int cmd, struct flock *lock, const void *owner,
-		size_t owner_len)
-{
-	int err;
-	struct message msg;
-	sigset_t old;
-	sigset_t block;
-
-	if (cmd != F_GETLK && cmd != F_SETLK && cmd != F_SETLKW)
-		return -EINVAL;
-
-	if (lock->l_type != F_RDLCK && lock->l_type != F_WRLCK &&
-	    lock->l_type != F_UNLCK)
-		return -EINVAL;
-
-	if (lock->l_whence != SEEK_SET && lock->l_whence != SEEK_CUR &&
-	    lock->l_whence != SEEK_END)
-		return -EINVAL;
-
-#ifdef DEBUG
-	fprintf(stderr, "libulockmgr: %i %i %i %lli %lli own: 0x%08x\n",
-		cmd, lock->l_type, lock->l_whence, lock->l_start, lock->l_len,
-		owner_hash(owner, owner_len));
-#endif
-
-	/* Unlock should never block anyway */
-	if (cmd == F_SETLKW && lock->l_type == F_UNLCK)
-		cmd = F_SETLK;
-
-	memset(&msg, 0, sizeof(struct message));
-	msg.cmd = cmd;
-	msg.fd = fd;
-	msg.lock = *lock;
-	err = ulockmgr_canonicalize(fd, &msg.lock);
-	if (err)
-		return err;
-
-	sigemptyset(&block);
-	sigaddset(&block, SIGUSR1);
-	pthread_sigmask(SIG_BLOCK, &block, &old);
-	pthread_mutex_lock(&ulockmgr_lock);
-	err = ulockmgr_send_request(&msg, owner, owner_len);
-	pthread_mutex_unlock(&ulockmgr_lock);
-	pthread_sigmask(SIG_SETMASK, &old, NULL);
-	if (!err && cmd == F_GETLK) {
-		if (msg.lock.l_type == F_UNLCK)
-			lock->l_type = F_UNLCK;
-		else
-			*lock = msg.lock;
-	}
-
-	return err;
-}

libfuse/lib/unbounded_queue.hpp

@@ -0,0 +1,161 @@
+#pragma once
+
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+#include <utility>
+
+
+template<typename T>
+class UnboundedQueue
+{
+public:
+  explicit
+  UnboundedQueue(bool block_ = true)
+    : _block(block_)
+  {
+  }
+
+  void
+  push(const T& item_)
+  {
+    {
+      std::lock_guard<std::mutex> guard(_queue_lock);
+      _queue.push(item_);
+    }
+    _condition.notify_one();
+  }
+
+  void
+  push(T&& item_)
+  {
+    {
+      std::lock_guard<std::mutex> guard(_queue_lock);
+      _queue.push(std::move(item_));
+    }
+
+    _condition.notify_one();
+  }
+
+  template<typename... Args>
+  void
+  emplace(Args&&... args_)
+  {
+    {
+      std::lock_guard<std::mutex> guard(_queue_lock);
+      _queue.emplace(std::forward<Args>(args_)...);
+    }
+
+    _condition.notify_one();
+  }
+
+  bool
+  try_push(const T& item_)
+  {
+    {
+      std::unique_lock<std::mutex> lock(_queue_lock, std::try_to_lock);
+      if(!lock)
+        return false;
+      _queue.push(item_);
+    }
+
+    _condition.notify_one();
+
+    return true;
+  }
+
+  bool
+  try_push(T&& item_)
+  {
+    {
+      std::unique_lock<std::mutex> lock(_queue_lock, std::try_to_lock);
+      if(!lock)
+        return false;
+      _queue.push(std::move(item_));
+    }
+
+    _condition.notify_one();
+
+    return true;
+  }
+
+  //TODO: push multiple T at once
+
+  bool
+  pop(T& item_)
+  {
+    std::unique_lock<std::mutex> guard(_queue_lock);
+
+    _condition.wait(guard, [&]() { return !_queue.empty() || !_block; });
+    if(_queue.empty())
+      return false;
+
+    item_ = std::move(_queue.front());
+    _queue.pop();
+
+    return true;
+  }
+
+  bool
+  try_pop(T& item_)
+  {
+    std::unique_lock<std::mutex> lock(_queue_lock, std::try_to_lock);
+    if(!lock || _queue.empty())
+      return false;
+
+    item_ = std::move(_queue.front());
+    _queue.pop();
+
+    return true;
+  }
+
+  std::size_t
+  size() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _queue.size();
+  }
+
+  bool
+  empty() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _queue.empty();
+  }
+
+  void
+  block()
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+    _block = true;
+  }
+
+  void
+  unblock()
+  {
+    {
+      std::lock_guard<std::mutex> guard(_queue_lock);
+      _block = false;
+    }
+
+    _condition.notify_all();
+  }
+
+  bool
+  blocking() const
+  {
+    std::lock_guard<std::mutex> guard(_queue_lock);
+
+    return _block;
+  }
+
+private:
+  mutable std::mutex _queue_lock;
+
+private:
+  bool _block;
+  std::queue<T> _queue;
+  std::condition_variable _condition;
+};