Bug 819187

Summary:	tar depends on xz-lzma-compat
Product:	[Fedora] Fedora	Reporter:	Ulrich Drepper <drepper>
Component:	tar	Assignee:	Pavel Raiskup <praiskup>
Status:	CLOSED RAWHIDE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	17	CC:	kdudka, ovasik, praiskup
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Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2013-03-19 15:01:47 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Ulrich Drepper 2012-05-05 13:39:42 UTC

Description of problem:
tar's ability to handle lzma-compressed archives depends on the xz-lzma-compat package which is not installed by default.


Version-Release number of selected component (if applicable):
tar-1.26-2.fc16.x86_64

How reproducible:
always

Steps to Reproduce:
1.compress tar ball with lzma
2.run 'tar atf compressed-tar-ball.tar.lzma'
3.
  
Actual results:
$ tar atf compressed-tar-ball.tar.lzma 
tar (child): lzma: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2

Expected results:
No error, tarball handled.

Additional info:
Either:
1. Add xz-lzma-compat as a runtime dependency to tar

or

2. Change tar to use lzcat instead of lzma.  The former comes with the xz package.

Comment 1 Ulrich Drepper 2012-05-05 13:59:47 UTC

Little typo: for solution two, use xzcat, not lzcat.

Comment 2 Ondrej Vasik 2012-05-05 15:16:21 UTC

Thanks for suggestions. I don't like hard runtime dependency idea - as it would mean adding runtime dependency for all the other external compression programs supported by tar.
Second option, changing LZMA_PROGRAM to something from xz package probably makes sense - probably to xz --format=lzma , which will cover that.

Comment 3 Pavel Raiskup 2013-01-24 12:48:58 UTC

I looked at this a little.  This could be easily done if there was possibility
to pass to tar compress command consisting of multiple arguments.  And so far
there is only possibility to pass single worded command.  Relevant upstream
discussion:

  http://lists.gnu.org/archive/html/bug-tar/2012-08/msg00001.html

There is possible to ship with GNU tar some wrapper around 'xz --format=lzma'
residing in PATH (which is ugly) or hack tar to support multi worded commands.

Pavel

Comment 4 Pavel Raiskup 2013-01-29 15:41:49 UTC

Taking.

Comment 5 Pavel Raiskup 2013-01-30 14:01:27 UTC

Upstream proposal:

  http://lists.gnu.org/archive/html/bug-tar/2013-01/msg00016.html

Comment 6 Pavel Raiskup 2013-03-19 15:01:47 UTC

Upstream added support for this by the commit:

http://git.savannah.gnu.org/cgit/tar.git/commit/?id=7b5e803963822e69a73d00ba62ac01b1c23f112c

I have added this quite big patch into fedora Rawhide.  This is not a so big
issue for fedora <= fc20 thus closing as RAWHIDE.

Pavel