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Re: du counting files in hard-linked directories twice
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From: |
Eric Blake |
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Subject: |
Re: du counting files in hard-linked directories twice |
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Date: |
Thu, 27 Aug 2009 20:54:36 -0600 |
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Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.23) Gecko/20090812 Thunderbird/2.0.0.23 Mnenhy/0.7.6.666 |
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According to Matthew Woehlke on 8/27/2009 5:09 PM:
> Hard-linked *directories*? I wasn't aware those were allowed... (If I
> read 'man 3 link' right, they aren't allowed on Linux.)
POSIX permits, but does not require, them (and Linux intentionally does
not permit them). Solaris has them (for superuser only), but they are
annoying; they break some optimizations that would otherwise be possible
due to unlink() vs. rmdir() semantics. Therefore, coreutils already
intentionally drops privileges on Solaris in order to remove the ability
to unlink a hard-linked directory.
- --
Don't work too hard, make some time for fun as well!
Eric Blake address@hidden
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