func start() *libfs.Error {
kbfsParams := libkbfs.AddFlags(flag.CommandLine)
platformParams := libfuse.AddPlatformFlags(flag.CommandLine)
flag.Parse()
if *version {
fmt.Printf("%s\n", libkbfs.VersionString())
return nil
}
if len(flag.Args()) < 1 {
fmt.Print(getUsageStr())
return libfs.InitError("no mount specified")
}
if len(flag.Args()) > 1 {
fmt.Print(getUsageStr())
return libfs.InitError("extra arguments specified (flags go before the first argument)")
}
if kbfsParams.Debug {
fuseLog := logger.NewWithCallDepth("FUSE", 1)
fuseLog.Configure("", true, "")
fuse.Debug = func(msg interface{}) {
fuseLog.Debug("%s", msg)
}
}
mountpoint := flag.Arg(0)
var mounter libfuse.Mounter
if *mountType == "force" {
mounter = libfuse.NewForceMounter(mountpoint, *platformParams)
} else {
mounter = libfuse.NewDefaultMounter(mountpoint, *platformParams)
}
options := libfuse.StartOptions{
KbfsParams: *kbfsParams,
RuntimeDir: *runtimeDir,
Label: *label,
}
return libfuse.Start(mounter, options)
}
// 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
}