Re: failure to remove+purge debian package generated by make deb-pkg

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

On Thu, Feb 25, 2010 at 11:29:11PM +0100, Frans Pop wrote:
> Uwe Kleine-König wrote:
> > I created and successfully installed a custom kernel package using
> > $(make deb-pkg).
> > 
> > Then after a failed boot test I removed it and then thought that I
> > actually want to purge it.
> > 
> > Cannot delete /boot/initrd.img-2.6.33-rc8-rt, doesn't exist.
> > run-parts: /etc/kernel/postrm.d/initramfs-tools exited with return code 1
> 
> It has nothing to do with the kernel package itself. The problem is in the 
> maintainer scripts that are run as hooks from /etc/kernel/*.d.
> 
> The kernel package built by deb-pkg does not have any maintainer scripts of 
> itself. All it does is run whatever is in the hooks. As custom kernels may 
> have other requirements than distro ones it's not surprising that the 
> distro hooks can throw errors [1].
> 
> Personally I use a set of custom hook scripts with my deb-pkg kernels. 
> Simply because I don't want to have to fix issues that are the result of 
> the distro hook scripts in /etc/kernel.
> 
> You can simply use custom hook scripts by doing e.g:
>     export KDEB_HOOKDIR=/etc/kernel.custom
> before calling 'make deb-pkg'. You can then create your own hook scripts 
> in /etc/kernel.custom/{pre,post}{inst,rm}.d/.
Actually I think it would be nice if the default configuration just
works.

I did some research and I concluded it's the fault of
/etc/kernel/postrm.d/initramfs-tools.  I think it should have the
following lines:

	# skip on purge
	[ "$DEB_MAINT_PARAMS" = "remove" ] || exit 0

I will report a bug against initramfs-tools.

> [1] Although in this case I would say that the initrd could also simply be 
> removed using 'rm -f' so it does not fail if it does not exist.
> You could file a BR against the package that installed that particular hook 
> script, probably initramfs-tools.
Actually this is my problem, the hook fails because the initrd is
missing.

Best regards and thanks
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |