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Am 18.10.2016 um 22:33 schrieb Eric Blake:
> tag 24730 notabug
> On 10/18/2016 02:49 PM, L. A. Walsh wrote:
>> It doesn't seem rmdir and mkdir are behaving "reciprocally"...
>> If I type
>> mkdir -p ./a/b/c # no error
> . already exists, so mkdir silently does nothing,
> ./a needs to be created,
> ./a/b needs to be created,
> ./a/b/c needs to be created
>> rmdir -p ./a/b/c # get error msg, but a,b,c removed.
> ./a/b/c needs to be removed,
> ./a/b needs to be removed,
> ./a needs to be removed,
> . needs to be removed, but you can't do that, hence the error
> The apparent asymmetry is due to the POSIX rules on how '.' is treated;
> but we can't change the behavior of either of these commands, because
> they are both following the POSIX rules.
> If you want symmetry, omit the leading './', as in:
> $ mkdir -p a/b/c
> $ rmdir -p a/b/c
>> 1) thinking either rmdir shouldn't generate an error or mkdir should
>> mkdir -p a/../b # no error
> a needs to be created,
> a/.. already exists, so it silently does nothing,
> a/../b needs to be created
>> rmdir -p a/../b # error, but a & b removed
> a/../b needs to be removed,
> a/.. needs to be removed, but you can't do that,
> at this point, POSIX is fuzzy whether to attempt to remove 'a', or to
> give up since 'a/..' was already an error; but obviously coreutils
> removes 'a'
What version of core-utils shows this behavior. In the latest one it's not
- -- Reuti
>> 2) similar comment to above -- leading to:
>> for rmdir, if "-p" is used, then as similar to "mkdir -p":
>> (no error if existing, make parent directories as needed)
>> rmdir -p should be
>> "no error if dir not empty, but directories are followed
>> and deleted as possible".
> Sadly, while that might be a nicer definition for 'rmdir -p', it doesn't
> match the POSIX requirements nor the historical behavior, so we can't
> really change it now.
> So I'm marking this as not a bug, as there is nothing to change.
> Eric Blake eblake redhat com +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
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