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> Random side note: on MacOS, the kernel does know all the filenames of a hardlink, because hardlinks are secretly implemented as fancy symlink-like data structures. You normally don't see any symptoms of this except that hardlinks are suspiciously slow on MacOS. But in exchange for the slowness, the kernel actually can look up all filenames of a hardlink if it wants. I think this has something to do with Aliases and finding .app files even if they move around, or something.

I don’t think this is true anymore with APFS.

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