lastfmsubmitd failed to install/upgrade if user provided group doesn't exist

[W. Tattersall]

:: DESCRIPTION ::
If the user enters a non-existent group at the lastfmsubmitd/spool_group prompt, the installation fails with
chown: invalid group: `lastfm:firstfm'
dpkg: error processing lastfmsubmitd (--configure):
 subprocess post-installation script returned error exit status 1

:: VERSION ::
lastfmsubmitd | 0.36-1 | hardy/universe | source, all
lastfmsubmitd | 0.37-2 | intrepid/universe | source, all
lastfmsubmitd | 0.37-3 | jaunty/universe | source, all
lastfmsubmitd | 1.0.5-1 | karmic/universe | source, all
lastfmsubmitd | 1.0.5-1 | lucid/universe | source, all

:: HOW TO REPRODUCE ::
When prompt with the question: "Group that may send submissions:" enter a group name that doesn't exist on your system and different from the default value "lastfm"

:: WORKAROUND ::
Keep the default.

:: FAULTY CODE ::
in debian/lastfmsubmitd.postinst:

db_get lastfmsubmitd/spool_group
if [ "$RET" ]; then
    for dir in /var/log/lastfm /var/run/lastfm /var/spool/lastfm; do
        chown "lastfm:$RET" $dir
        chmod 2775 $dir
    done
fi

========================

I do not know what happened

ProblemType: Package
Architecture: i386
DistroRelease: Ubuntu 9.04
ErrorMessage: subprocess post-installation script returned error exit status 1
NonfreeKernelModules: nvidia
Package: lastfmsubmitd 0.37-3
PackageArchitecture: all
SourcePackage: lastfmsubmitd
Title: package lastfmsubmitd 0.37-3 failed to install/upgrade: subprocess post-installation script returned error exit status 1
Uname: Linux 2.6.28-11-generic i686

[Dave Walker (davewalker)]

Relevent Extract from appatch dpkg log:
Setting up lastfmsubmitd (0.37-3) ...

chown: invalid group: `lastfm:firstfm'

dpkg: error processing lastfmsubmitd (--configure):

 subprocess post-installation script returned error exit status 1

Errors were encountered while processing:

 lastfmsubmitd

I am not quite sure how the group "firstfm" came to exist. Could not reproduce on Jaunty. Will investigate further.

[Jean-Baptiste Lallement (jibel)]

Confirmed in Lucid.

This error occurs if the user enters a non-existent group at the lastfmsubmitd/spool_group prompt.
To workaround this error, either let the default or enter an exiting group.

[Jean-Baptiste Lallement (jibel)]

debdiff for lucid

[Ilya Barygin (randomaction)]

Uploaded, thank you for your contribution.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lastfmsubmitd - 1.0.5-1.1ubuntu1

---------------
lastfmsubmitd (1.0.5-1.1ubuntu1) lucid; urgency=low

  * lastfmsubmitd.postinst: Create spool group if it doesn't exist. (LP: #386240)
 -- Jean-Baptiste Lallement <email address hidden> Sat, 09 Jan 2010 22:09:54 +0100