package docker import ( "fmt" "github.com/dotcloud/docker/utils" "os" "os/exec" "path/filepath" "syscall" "time" ) func Unmount(target string) error { if err := exec.Command("auplink", target, "flush").Run(); err != nil { utils.Errorf("[warning]: couldn't run auplink before unmount: %s", err) } if err := syscall.Unmount(target, 0); err != nil { return err } // Even though we just unmounted the filesystem, AUFS will prevent deleting the mntpoint // for some time. We'll just keep retrying until it succeeds. for retries := 0; retries < 1000; retries++ { err := os.Remove(target) if err == nil { // rm mntpoint succeeded return nil } if os.IsNotExist(err) { // mntpoint doesn't exist anymore. Success. return nil } // fmt.Printf("(%v) Remove %v returned: %v\n", retries, target, err) time.Sleep(10 * time.Millisecond) } return fmt.Errorf("Umount: Failed to umount %v", target) } func Mounted(mountpoint string) (bool, error) { mntpoint, err := os.Stat(mountpoint) if err != nil { if os.IsNotExist(err) { return false, nil } return false, err } parent, err := os.Stat(filepath.Join(mountpoint, "..")) if err != nil { return false, err } mntpointSt := mntpoint.Sys().(*syscall.Stat_t) parentSt := parent.Sys().(*syscall.Stat_t) return mntpointSt.Dev != parentSt.Dev, nil }