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