// Start the filesystem
func Start(mounter Mounter, options StartOptions) *Error {
c, err := mounter.Mount()
if err != nil {
return MountError(err.Error())
}
defer c.Close()
onInterruptFn := func() {
select {
case <-c.Ready:
// Was mounted, so try to unmount if it was successful.
if c.MountError == nil {
err = mounter.Unmount()
if err != nil {
return
}
}
default:
// Was not mounted successfully yet, so do nothing. Note that the mount
// could still happen, but that's a rare enough edge case.
}
}
log := logger.NewWithCallDepth("", 1, os.Stderr)
log.Info("KBFS version %s", libkbfs.VersionString())
config, err := libkbfs.Init(options.KbfsParams, onInterruptFn, log)
if err != nil {
return InitError(err.Error())
}
defer libkbfs.Shutdown(options.KbfsParams.MemProfile)
if options.RuntimeDir != "" {
info := libkb.NewServiceInfo(libkbfs.Version, libkbfs.Build(), options.Label, os.Getpid())
err = info.WriteFile(path.Join(options.RuntimeDir, "kbfs.info"))
if err != nil {
return InitError(err.Error())
}
}
fs := NewFS(config, c, options.KbfsParams.Debug)
ctx := context.WithValue(context.Background(), CtxAppIDKey, fs)
logTags := make(logger.CtxLogTags)
logTags[CtxIDKey] = CtxOpID
ctx = logger.NewContextWithLogTags(ctx, logTags)
fs.Serve(ctx)
<-c.Ready
err = c.MountError
if err != nil {
return MountError(err.Error())
}
return nil
}
// Define this so deferred functions get executed before exit.
func realMain() (exitStatus int) {
kbfsParams := libkbfs.AddFlags(flag.CommandLine)
flag.Parse()
if *version {
fmt.Printf("%s\n", libkbfs.VersionString())
return 0
}
if len(flag.Args()) < 1 {
fmt.Print(getUsageStr())
return 1
}
log := logger.NewWithCallDepth("", 1)
config, err := libkbfs.Init(*kbfsParams, nil, log)
if err != nil {
printError("kbfs", err)
return 1
}
defer libkbfs.Shutdown()
// TODO: Make the logging level WARNING instead of INFO, or
// figure out some other way to log the full folder-branch
// name for kbfsfuse but not for kbfs.
cmd := flag.Arg(0)
args := flag.Args()[1:]
ctx := context.Background()
switch cmd {
case "stat":
return stat(ctx, config, args)
case "ls":
return ls(ctx, config, args)
case "mkdir":
return mkdir(ctx, config, args)
case "read":
return read(ctx, config, args)
case "write":
return write(ctx, config, args)
default:
printError("kbfs", fmt.Errorf("unknown command '%s'", cmd))
return 1
}
}
// Start the filesystem
func Start(mounter Mounter, options StartOptions) *libfs.Error {
// InitLog errors are non-fatal and are ignored.
log, _ := libkbfs.InitLog(options.KbfsParams)
if options.RuntimeDir != "" {
info := libkb.NewServiceInfo(libkbfs.Version, libkbfs.PrereleaseBuild, options.Label, os.Getpid())
err := info.WriteFile(path.Join(options.RuntimeDir, "kbfs.info"))
if err != nil {
return libfs.InitError(err.Error())
}
}
log.Debug("Mounting: %s", mounter.Dir())
c, err := mounter.Mount()
if err != nil {
return libfs.MountError(err.Error())
}
defer c.Close()
onInterruptFn := func() {
select {
case <-c.Ready:
// Was mounted, so try to unmount if it was successful.
if c.MountError == nil {
err = mounter.Unmount()
if err != nil {
return
}
}
default:
// Was not mounted successfully yet, so do nothing. Note that the mount
// could still happen, but that's a rare enough edge case.
}
}
log.Debug("Initializing")
config, err := libkbfs.Init(options.KbfsParams, onInterruptFn, log)
if err != nil {
return libfs.InitError(err.Error())
}
defer libkbfs.Shutdown()
log.Debug("Creating filesystem")
fs := NewFS(config, c, options.KbfsParams.Debug)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
ctx = context.WithValue(ctx, CtxAppIDKey, fs)
log.Debug("Serving filesystem")
fs.Serve(ctx)
<-c.Ready
err = c.MountError
if err != nil {
return libfs.MountError(err.Error())
}
log.Debug("Ending")
return nil
}