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44 lines
1.3 KiB
44 lines
1.3 KiB
5 years ago
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/*
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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 "os"
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// GetLinkInfo returns an identifier representing the node a hardlink is pointing
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// to. If the file is not hard linked then 0 will be returned.
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func GetLinkInfo(fi os.FileInfo) (uint64, bool) {
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return getLinkInfo(fi)
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}
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// getLinkSource returns a path for the given name and
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// file info to its link source in the provided inode
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// map. If the given file name is not in the map and
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// has other links, it is added to the inode map
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// to be a source for other link locations.
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func getLinkSource(name string, fi os.FileInfo, inodes map[uint64]string) (string, error) {
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inode, isHardlink := getLinkInfo(fi)
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if !isHardlink {
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return "", nil
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}
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path, ok := inodes[inode]
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if !ok {
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inodes[inode] = name
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}
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return path, nil
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}
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