When extracting an archive that contains hardlinks onto a filesystem that does not support hardlinks, the file should be duplicated.

The current behavior is to error extracting the hardlink, and it is not created.

In fact, xar(1) does not extract hardlinked files alone. Suppose we have file yar.

$ ln yar zar $ xar -cf test.xar [yz]ar $ rm [yz]ar $ xar -xf test.xar zar Error while extracting archive:(zar): io: Could not create file (No such file or directory) - ignored