mirror of https://github.com/docker/cli.git
40 lines
1.2 KiB
Go
40 lines
1.2 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 driver
|
||
|
|
|
||
|
|
import (
|
||
|
|
"os"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Lchmod changes the mode of a file not following symlinks.
|
||
|
|
func (d *driver) Lchmod(path string, mode os.FileMode) error {
|
||
|
|
// On Linux, file mode is not supported for symlinks,
|
||
|
|
// and fchmodat() does not support AT_SYMLINK_NOFOLLOW,
|
||
|
|
// so symlinks need to be skipped entirely.
|
||
|
|
if st, err := os.Stat(path); err == nil && st.Mode()&os.ModeSymlink != 0 {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
err := unix.Fchmodat(unix.AT_FDCWD, path, uint32(mode), 0)
|
||
|
|
if err != nil {
|
||
|
|
err = &os.PathError{Op: "lchmod", Path: path, Err: err}
|
||
|
|
}
|
||
|
|
return err
|
||
|
|
}
|