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24 lines
1.1 KiB
Go
24 lines
1.1 KiB
Go
package archive
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// Whiteouts are files with a special meaning for the layered filesystem.
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// Docker uses AUFS whiteout files inside exported archives. In other
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// filesystems these files are generated/handled on tar creation/extraction.
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// WhiteoutPrefix prefix means file is a whiteout. If this is followed by a
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// filename this means that file has been removed from the base layer.
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const WhiteoutPrefix = ".wh."
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// WhiteoutMetaPrefix prefix means whiteout has a special meaning and is not
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// for removing an actual file. Normally these files are excluded from exported
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// archives.
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const WhiteoutMetaPrefix = WhiteoutPrefix + WhiteoutPrefix
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// WhiteoutLinkDir is a directory AUFS uses for storing hardlink links to other
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// layers. Normally these should not go into exported archives and all changed
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// hardlinks should be copied to the top layer.
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const WhiteoutLinkDir = WhiteoutMetaPrefix + "plnk"
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// WhiteoutOpaqueDir file means directory has been made opaque - meaning
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// readdir calls to this directory do not follow to lower layers.
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const WhiteoutOpaqueDir = WhiteoutMetaPrefix + ".opq"
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