mconfig subcommand ready

common/log/logger.go

@@ -119,6 +119,15 @@ func CreateStdoutLogWriter() WriterCreator {
 	}
 }
 
+// CreateStderrLogWriter returns a LogWriterCreator that creates LogWriter for stderr.
+func CreateStderrLogWriter() WriterCreator {
+	return func() Writer {
+		return &consoleLogWriter{
+			logger: log.New(os.Stderr, "", log.Ldate|log.Ltime),
+		}
+	}
+}
+
 // CreateFileLogWriter returns a LogWriterCreator that creates LogWriter for the given file.
 func CreateFileLogWriter(path string) (WriterCreator, error) {
 	file, err := os.OpenFile(path, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)

common/platform/ctlcmd/ctlcmd.go

@@ -39,6 +39,9 @@ func Run(args []string, input io.Reader) (buf.MultiBuffer, error) {
 		}
 		return nil, newError(msg).Base(err)
 	}
+	if !errBuffer.IsEmpty() {
+		newError("v2ctl > ", errBuffer.String()).AtInfo().WriteToLog()
+	}
 
 	return outBuffer.MultiBuffer, nil
 }