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From: Dan C on 12 Feb 2010 16:54
On Fri, 12 Feb 2010 13:11:31 -0800, Keith Keller wrote:

> On 2010-02-12, Dan C <youmustbejoking(a)lan.invalid> wrote:
>>
>> Why would one think that the version of tar which ships with Slack13
>> would *NOT* handle .txz files.... since that is the default package
>> compression method as of Slack13...?
>
> Well, partly because it doesn't. Remember that pkgtools uses tar-1.13
> by default, which as far as I can tell does not support xz. So you see
> this, for example, in installpkg:
>
> ( cd $ROOT/ ; $packagecompression -dc | $TAR -xlUpvf - ) < $package >>
> $TMP/$shortname 2> /dev/null
>
> where $packagecompression is determined by the extension.
>
> As pkgtools demonstrates, it doesn't really matter what compression tar
> supports, as long as an uncompression utility exists that can pipe to
> stdout. Alternatively, tar can support arbitrary compression algorithms
> through the -I switch.

I see. I hadn't realized that 'xz' was a standalone program and that tar
piped to it when used with pkgtools. Thanks for the clarification.


--
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"Bother!" said Pooh, as Lorena Bobbitt tied him to the bed.

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From: Richard Herbert on 12 Feb 2010 21:51
On Thu, 11 Feb 2010 21:11:53 -0800, allend wrote:

> You can also use Midnight Commander. Highlight the *.txz and hit F3
> (View).

Thanks. I should have thought of that! Of course, I was using the 12.2
version of MC, but I just grabbed the "current" version, and it works like
a charm.

Thanks very much for all of the other helpful suggestions.

Richard Herbert
From: Eef Hartman on 22 Feb 2010 05:36
Keith Keller <kkeller-usenet(a)wombat.san-francisco.ca.us> wrote:
> I don't believe any version of tar that comes with Slackware supports xz
> compression, so you need to do something like the xzcat pipe I posted
> earlier (or the equivalent, like uncompressing the tarball on disk).

As long as the xz program itself is available you can use the
--use-compress-program=xz
option with any older version of tar (instead of the "-z" or "-j" ones)
and it will work fine.
Have been using this a long time in both 10.2 and 12.2 releases and
even Pat's own tar-1.13 will do this (it is not the way HE does it,
but it does work, see this from its usage screen:
--use-compress-program=PROG filter through PROG (must accept -d)
--
*******************************************************************
** Eef Hartman, Delft University of Technology, dept. SSC/ICT **
** e-mail: E.J.M.Hartman(a)tudelft.nl - phone: +31-15-278 82525 **
*******************************************************************
From: Eef Hartman on 22 Feb 2010 05:39
Dan C <youmustbejoking(a)lan.invalid> wrote:
> On Fri, 12 Feb 2010 10:59:35 -0800, Keith Keller wrote:
> Why would one think that the version of tar which ships with Slack13
> would *NOT* handle .txz files.... since that is the default package
> compression method as of Slack13...?

Maybe the fact that Pat is NOT using that tar version? <grin>

The pkg toolsset a long time has been using tar 1.13 exclusively as
never versions seem to conflict with the way these scripts work.
--
*******************************************************************
** Eef Hartman, Delft University of Technology, dept. SSC/ICT **
** e-mail: E.J.M.Hartman(a)tudelft.nl - phone: +31-15-278 82525 **
*******************************************************************
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