cri-o/vendor/github.com/containers/storage/drivers/aufs/mount.go

// +build linux

package aufs

import (
	"os/exec"
	"syscall"

	"github.com/sirupsen/logrus"
)

// Unmount the target specified.
func Unmount(target string) error {
	if err := exec.Command("auplink", target, "flush").Run(); err != nil {
		logrus.Warnf("Couldn't run auplink before unmount %s: %s", target, err)
	}
	if err := syscall.Unmount(target, 0); err != nil {
		return err
	}
	return nil
}