support runtime setting of srcmounts. closes #12

src/unlink.cpp

@@ -33,6 +33,7 @@
 #include "ugid.hpp"
 #include "fs.hpp"
 #include "config.hpp"
+#include "rwlock.hpp"
 
 using std::string;
 using std::vector;
@@ -74,6 +75,7 @@ namespace mergerfs
       const struct fuse_context *fc     = fuse_get_context();
       const config::Config      &config = config::get();
       const ugid::SetResetGuard  ugid(fc->uid,fc->gid);
+      const rwlock::ReadGuard    readlock(&config.srcmountslock);
 
       return _unlink(*config.action,
                      config.srcmounts,