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43 lines
1.3 KiB
43 lines
1.3 KiB
/* |
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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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