func run(c *cli.Context) (err error) {
// Mount, writing information about our progress to the writer that package
// daemon gives us and telling it about the outcome.
var mfs *fuse.MountedFileSystem
{
mountStatus := log.New(daemon.StatusWriter(), "", 0)
mfs, err = mountFromContext(c, mountStatus)
if err == nil {
mountStatus.Println("File system has been successfully mounted.")
daemon.SignalOutcome(nil)
} else {
err = fmt.Errorf("mountFromContext: %v", err)
daemon.SignalOutcome(err)
return
}
}
// Let the user unmount with Ctrl-C (SIGINT).
registerSIGINTHandler(mfs.Dir())
// Wait for the file system to be unmounted.
err = mfs.Join(context.Background())
if err != nil {
err = fmt.Errorf("MountedFileSystem.Join: %v", err)
return
}
return
}
func runCLIApp(c *cli.Context) (err error) {
flags := populateFlags(c)
// Extract arguments.
if len(c.Args()) != 2 {
err = fmt.Errorf(
"%s takes exactly two arguments. Run `%s --help` for more info.",
path.Base(os.Args[0]),
path.Base(os.Args[0]))
return
}
bucketName := c.Args()[0]
mountPoint := c.Args()[1]
// Canonicalize the mount point, making it absolute. This is important when
// daemonizing below, since the daemon will change its working directory
// before running this code again.
mountPoint, err = filepath.Abs(mountPoint)
if err != nil {
err = fmt.Errorf("canonicalizing mount point: %v", err)
return
}
fmt.Fprintf(os.Stderr, "Using mount point: %s\n", mountPoint)
// If we haven't been asked to run in foreground mode, we should run a daemon
// with the foreground flag set and wait for it to mount.
if !flags.Foreground {
// Find the executable.
var path string
path, err = osext.Executable()
if err != nil {
err = fmt.Errorf("osext.Executable: %v", err)
return
}
// Set up arguments. Be sure to use foreground mode, and to send along the
// potentially-modified mount point.
args := append([]string{"--foreground"}, os.Args[1:]...)
args[len(args)-1] = mountPoint
// Pass along PATH so that the daemon can find fusermount on Linux.
env := []string{
fmt.Sprintf("PATH=%s", os.Getenv("PATH")),
}
// Run.
err = daemonize.Run(path, args, env, os.Stderr)
if err != nil {
err = fmt.Errorf("daemonize.Run: %v", err)
return
}
return
}
// Mount, writing information about our progress to the writer that package
// daemonize gives us and telling it about the outcome.
var mfs *fuse.MountedFileSystem
{
mountStatus := log.New(daemonize.StatusWriter, "", 0)
mfs, err = mountWithArgs(bucketName, mountPoint, flags, mountStatus)
if err == nil {
mountStatus.Println("File system has been successfully mounted.")
daemonize.SignalOutcome(nil)
} else {
err = fmt.Errorf("mountWithArgs: %v", err)
daemonize.SignalOutcome(err)
return
}
}
// Let the user unmount with Ctrl-C (SIGINT).
registerSIGINTHandler(mfs.Dir())
// Wait for the file system to be unmounted.
err = mfs.Join(context.Background())
if err != nil {
err = fmt.Errorf("MountedFileSystem.Join: %v", err)
return
}
return
}
func main() {
app := NewApp()
app.Action = func(c *cli.Context) (err error) {
// We should get two arguments exactly. Otherwise error out.
if len(c.Args()) != 2 {
fmt.Fprintf(
os.Stderr,
"Error: %s takes exactly two arguments.\n\n",
app.Name)
cli.ShowAppHelp(c)
os.Exit(1)
}
// Populate and parse flags.
bucketName := c.Args()[0]
mountPoint := c.Args()[1]
flags := PopulateFlags(c)
InitLoggers(!flags.Foreground)
massagePath()
if !flags.Foreground {
massageArg0()
ctx := new(daemon.Context)
var child *os.Process
child, err = ctx.Reborn()
if err != nil {
panic(fmt.Sprintf("unable to daemonize: %v", err))
}
if child != nil {
return
} else {
defer ctx.Release()
}
}
// Mount the file system.
var mfs *fuse.MountedFileSystem
mfs, err = mount(
context.Background(),
bucketName,
mountPoint,
flags)
if err != nil {
log.Fatalf("Mounting file system: %v", err)
}
log.Println("File system has been successfully mounted.")
// Let the user unmount with Ctrl-C (SIGINT).
registerSIGINTHandler(mfs.Dir())
// Wait for the file system to be unmounted.
err = mfs.Join(context.Background())
if err != nil {
err = fmt.Errorf("MountedFileSystem.Join: %v", err)
return
}
log.Println("Successfully exiting.")
return
}
err := app.Run(MassageMountFlags(os.Args))
if err != nil {
log.Fatalln(err)
}
}