// +build !windows

package testutil

import (
	"os"
	"testing"

	"golang.org/x/sys/unix"
)

// Unmount unmounts a given mountPoint and sets t.Error if it fails
func Unmount(t *testing.T, mountPoint string) {
	t.Log("unmount", mountPoint)
	if err := unmountAll(mountPoint); err != nil {
		t.Error("Could not umount", mountPoint, err)
	}
}

// RequiresRoot skips tests that require root, unless the test.root flag has
// been set
func RequiresRoot(t testing.TB) {
	if !rootEnabled {
		t.Skip("skipping test that requires root")
		return
	}
	if os.Getuid() != 0 {
		t.Error("This test must be run as root.")
	}
}

func unmountAll(mountpoint string) error {
	for {
		if err := unix.Unmount(mountpoint, unmountFlags); err != nil {
			if err == unix.EINVAL {
				return nil
			}
			return err
		}
	}
}