Greetings. I'm using TAR_OPTIONS with GNU tar 1.29 to set my preferred compression program:
$ export TAR_OPTIONS="--use-compress-program=lbzip2"
However, doing so seems to break the -a (--auto-compress) option:
$ tar -x -a -v -f foo.tar.bz2
tar (child): laN\a\306\320U: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
Some observations:
* The problem seems to happens only when --use-compress-program is
invoked via $TAR_OPTIONS. If I pass it on the command line, or don't
pass it at all (that is, neither on the command line nor via
$TAR_OPTIONS) then everything works fine.
* Specifying -j instead of -a also works in any case.
* The problem happens to matter what value is passed to
--use-compress-program. (That is, this isn't a problem with lbzip2.)
I suspect this is a bug but would be happy to be corrected.
Full steps to reproduce, showing what works and what doesn't:
$ touch 'This works fine'
$ export TAR_OPTIONS=
$ tar -c -j -v -f foo.tar.bz2 'This works fine'
This works fine
$ tar -x -a -v -f foo.tar.bz2
This works fine
$ tar --use-compress-program=lbzip2 -x -a -v -f foo.tar.bz2
This works fine
$ export TAR_OPTIONS="--use-compress-program=lbzip2"
$ tar -x -j -v -f foo.tar.bz2
This works fine
$ tar -x -a -v -f foo.tar.bz2
tar (child): la\256\233\350\267U: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
Regards,
Tristan
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Tristan Miller
Free Software developer, ferret herder, logologist
https://logological.org/
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