51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package mount
|
|
|
|
import (
|
|
"os/exec"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// fuseSuperMagic is defined in statfs(2)
|
|
const fuseSuperMagic = 0x65735546
|
|
|
|
func isFUSE(dir string) bool {
|
|
var st unix.Statfs_t
|
|
if err := unix.Statfs(dir, &st); err != nil {
|
|
return false
|
|
}
|
|
return st.Type == fuseSuperMagic
|
|
}
|
|
|
|
// unmountFUSE attempts to unmount using fusermount/fusermount3 helper binary.
|
|
//
|
|
// For FUSE mounts, using these helper binaries is preferred, see:
|
|
// https://github.com/containerd/containerd/pull/3765#discussion_r342083514
|
|
func unmountFUSE(target string) error {
|
|
var err error
|
|
for _, helperBinary := range []string{"fusermount3", "fusermount"} {
|
|
cmd := exec.Command(helperBinary, "-u", target)
|
|
err = cmd.Run()
|
|
if err == nil {
|
|
return nil
|
|
}
|
|
}
|
|
return err
|
|
}
|