Add flag to allow "immutable" files to be overwritten #109
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…LAGS that clears platform-specific file flags that might prevent the removal of a file system object before attempting to remove it. Sponsored by: DARPA, AFRL
flags which might prevent the removal or modifiction of files to be cleared before attempting to remove them. Sponsored by: DARPA, AFRL
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@kientzle Any feedback on this? I need something like it to allow me to replace installworld with a tar invocation (with an mtree file and stage directory as input) |
kientzle
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Jul 26, 2015
Add flag to allow "immutable" files to be overwritten
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Merged. Apologies for the delay. Note there was a big effort in the libarchive 2.0 timeframe to reduce the total number of sys calls made on the restore path. I expect that in the normal case, flags reset is only needed on a handful of items which implies we might be able to optimize this by only trying the flags reset if the initial unlink attempt fails. |
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These changes add a libarchive and tar flag to allow "immutable" files to be overwritten by removing the flags before deleting the files. This is useful for situations such as recovering a corrupted FreeBSD system from release tar files.