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Re: [Bug-tar] option -C ignored when it comes after the source directory
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From: |
Eric Blake |
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Subject: |
Re: [Bug-tar] option -C ignored when it comes after the source directory |
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Date: |
Fri, 14 May 2010 16:36:17 -0600 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-3.fc13 Lightning/1.0b1 Mnenhy/0.8.2 Thunderbird/3.0.4 |
On 05/14/2010 04:30 PM, Bruno Haible wrote:
> Hi,
>
> Seen with tar-1.23 on a glibc system:
> $ tar cf - . -C /mnt
> has a different effect than
> $ tar cf - -C /mnt .
Not a bug. Tar has to consider legacy operation, when you don't use a
leading - in front of short options.
You probably want:
$ tar -cf - . -C /mnt
or:
$ tar cfC - /mnt .
> I consider this a bug for two reasons:
>
> 1) glibc systems use GNU getopt. It allows to mix command line options with
> regular arguments. The very idea of this feature is that
> PROG ARGS OPTIONS
> is equivalent to
> PROG OPTIONS ARGS
Only when you use the dashed form of short opts, and not the legacy
dashless form. This is documented in the tar manual.
--
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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