On 05/14/2010 04:40 PM, Bruno Haible wrote:
> Hi,
> 
> With tar-1.23, "tar --help" says in particular:
> 
>       --old-archive, --portability
>                              same as --format=v7
> 
> But these options are not recognized:
> 
>   $ tar cf - -C /mnt --old-archive . > /dev/null 
>   tar: --old-archive: (PROGRAM ERROR) Option should have been recognized!?
>   Try `tar --help' or `tar --usage' for more information.

The bug is in your usage pattern.  Again, the manual is explicit that
non-dashed short options behave differently than dashed short options.
You meant:

$ tar -cf - -C /mnt --old-archive . > /dev/null

-- 
Eric Blake   [email protected]    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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