mirror of https://github.com/docker/cli.git
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package driver
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import (
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"os"
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"golang.org/x/sys/unix"
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)
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// Lchmod changes the mode of a file not following symlinks.
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func (d *driver) Lchmod(path string, mode os.FileMode) error {
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// On Linux, file mode is not supported for symlinks,
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// and fchmodat() does not support AT_SYMLINK_NOFOLLOW,
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// so symlinks need to be skipped entirely.
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if st, err := os.Stat(path); err == nil && st.Mode()&os.ModeSymlink != 0 {
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return nil
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}
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err := unix.Fchmodat(unix.AT_FDCWD, path, uint32(mode), 0)
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if err != nil {
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err = &os.PathError{Op: "lchmod", Path: path, Err: err}
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}
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return err
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}
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