On Mon, May 23, 2005 at 11:51:29AM +0200, martin f krafft wrote: > The fluxbox in woody, 0.1.7-3 diverts /usr/bin/bsetbg to > /usr/bin/bsetbg.blackbox, but it only removes those diversions in > postrm/remove. Installing and deinstalling this package works fine, > with or without blackbox installed: Meh. This definitely looks like a dpkg bug, and it also explains how bug #309485 got to be the way it was. Well, at least we have an explanation now. > root@woody:/# dpkg -l fluxbox | grep ^ii > ii fluxbox 0.1.7-3 Highly configurable and low resource X11 Win > root@woody:/# md5sum /usr/bin/bsetbg* > 2ea340efa4ee7d20cb76c2d48adf3fbf /usr/bin/bsetbg > 9ab1aca855e8990ca6df9399c24f20da /usr/bin/bsetbg.blackbox > root@woody:/# dpkg -S /usr/bin/bsetbg > diversion by fluxbox from: /usr/bin/bsetbg > diversion by fluxbox to: /usr/bin/bsetbg.blackbox > blackbox, fluxbox: /usr/bin/bsetbg > root@woody:/# dpkg --remove fluxbox > [...] > Removing `diversion of /usr/bin/bsetbg to /usr/bin/bsetbg.blackbox by fluxbox' > [...] > root@woody:/# md5sum /usr/bin/bsetbg* > 9ab1aca855e8990ca6df9399c24f20da /usr/bin/bsetbg > root@woody:/# dpkg -S /usr/bin/bsetbg > blackbox: /usr/bin/bsetbg > root@woody:/# dpkg -i /var/cache/apt/archives/fluxbox_0.1.7-3_i386.deb > [...] > Unpacking fluxbox (from .../fluxbox_0.1.7-3_i386.deb) ... > Adding `diversion of /usr/bin/bsetbg to /usr/bin/bsetbg.blackbox by fluxbox' > [...] > Setting up fluxbox (0.1.7-3) ... > A problem arises (#310050) when 0.9.11-* is used to upgrade the > woody version. 0.9.11-* does not provide /usr/bin/bsetbg anymore, > but 0.1.7-3 is not given a chance to remove it, since on an upgrade, > old-postrm/remove is (obvioulsy) not called. That part is a fluxbox bug, and not even a bug in the previous version but in the current one; you can't remove a diversion for a file until you've removed your version of the file, otherwise you get a file collision. > Thus, when 0.9.11-* has been unpacked, dpkg does not know about > /usr/bin/bsetbg anymore, but it still has a diversion for it: > root@woody:/# dpkg --unpack /var/cache/apt/archives/fluxbox_0.9.11-1sarge0_i386.deb > [...] > Preparing to replace fluxbox 0.1.7-3 (using .../fluxbox_0.9.11-1sarge0_i386.deb) ... > [...] > root@woody:/# dpkg -S /usr/bin/bsetbg diversion by fluxbox from: /usr/bin/bsetbg > diversion by fluxbox to: /usr/bin/bsetbg.blackbox > blackbox: /usr/bin/bsetbg > So far so good (well, or bad). This could be easily fixed in the > 0.9.11 postinst. It would have to be postinst since the preinst is > called before the 0.1.7-3 files are removed, and no diversions for > still-existing files can be removed. > Now make sure to be seated: after the unpack, however, > /usr/bin/bsetbg is still on the system, but dpkg knows jack about > it. > root@woody:/# dpkg -S /usr/bin/bsetbg diversion by fluxbox from: /usr/bin/bsetbg > diversion by fluxbox to: /usr/bin/bsetbg.blackbox > blackbox: /usr/bin/bsetbg > root@woody:/# md5sum /usr/bin/bsetbg* > 2ea340efa4ee7d20cb76c2d48adf3fbf /usr/bin/bsetbg > 9ab1aca855e8990ca6df9399c24f20da /usr/bin/bsetbg.blackbox > This is our main problem and a complete mystery. The rest of this > post is just a consequence. The same applies to the associated > manpage, btw. And it seems not to make a difference in which order > blackbox and fluxbox are upgraded -- as long as blackbox is > installed. If it is not, then this entire problem does not appear. For further fun (and to see the exact bug that libldap2 was tripping across), remove blackbox and then un-divert (by hand, in this case) bsetbg. You get a nice little file named /usr/bin/bsetbg, which dpkg knows nothing about. :/ > Right now, the only way seems to be to call the following ugly hack > in postinst/upgrade: > if [ -n "$2" ] && dpkg --compare-versions "$2" le "0.1.7-3"; then > if [ -f /usr/bin/bsetbg ] && [ -f /usr/bin/bsetbg.blackbox ] \ > && dpkg-divert --list /usr/bin/bsetbg | \ > grep -q '^diversion.*by fluxbox$'; then > rm /usr/bin/bsetbg > fi > if [ -f /usr/share/man/man1/bsetbg.1.gz ] \ > && [ -f /usr/share/man/man1/bsetbg.1.gz.blackbox ] \ > && dpkg-divert --list /usr/bin/bsetbg | \ > grep -q '^diversion.*by fluxbox$'; then > rm /usr/share/man/man1/bsetbg.1.gz > fi > dpkg-divert --package fluxbox --remove --rename /usr/bin/bsetbg > dpkg-divert --package fluxbox --remove --rename /usr/share/man/man1/bsetbg.1.gz > fi > Do you know any better way? I think checking the output of dpkg-divert --list is probably redundant here, FWIW. -- Steve Langasek postmodern programmer
Attachment:
signature.asc
Description: Digital signature