[PATCH] tar: support the common file extensions .tlzma and .txz

[Denys Vlasenko]

On Wed, Feb 29, 2012 at 9:03 PM, Lauri Kasanen <curaga at operamail.com> wrote:
>> > The attached patch adds support for .txz and .tlzma tar archives. For
>> > .txz the proper way would be to add the magic detection
>>
>> The autodetection should already work, see archival/tar.c:
>
> Using git master:
>
> $ ./busybox tar tvf /tmp/test.txz
> tar: invalid tar magic
>
> Renaming the file to .tar.xz lets bb tar read it.
>
>> I am not convinced .txz and .tlzma extensions are common.
>> (In my opinion, existence of .tgz extension was a mistake).
>
> They exist, and GNU tar handles them, so I think bb tar shouldn't puke
> when it sees one. Busybox does handle .tgz and .tbz2, because they have
> the magic detection already written (xz magic is marked todo in
> archival/libarchive/get_header_tar.c).

I consolidated several copies of autodetection code. One in get_header_tar.c
is gone.
Now tar recognizes XZ-compressed data using generic setup_unzip_on_fd().
I added a testsuite entry which verifies that.
Please try current git.
Please also review last ~5 commits, maybe I added a few bugs :(

-- 
vda