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36 lines
966 B
Go
36 lines
966 B
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 fs
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import (
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"errors"
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"fmt"
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"golang.org/x/sys/unix"
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)
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func copyFile(target, source string) error {
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if err := unix.Clonefile(source, target, unix.CLONE_NOFOLLOW); err != nil {
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if !errors.Is(err, unix.ENOTSUP) && !errors.Is(err, unix.EXDEV) {
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return fmt.Errorf("clonefile failed: %w", err)
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}
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return openAndCopyFile(target, source)
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}
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return nil
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}
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