On Thu, Sep 10, 2009 at 09:38:35PM +0200, Petter Reinholdtsen wrote:
> [Josh Triplett]
> > hotplug only exists in etch. It does not exist in lenny, and Debian
> > does not support upgrades that skip a release. Thus, please drop
> > the override for hotplug (and hotplug-net), and conflict with
> > hotplug instead.
>
> I'm not quite sure this is safe to do, and that is why the overrides
> for scripts in rcS.d/ was kept. The scenario I am afraid of, is a
> machine that was installed with Etch or earlier, which used to have
> hotplug installed, and got the package removed but not purged. This
> would leave the init.d script behind until the package is purged.
Good point. Conflicts doesn't force purging.
> If such machine started using dependency based boot sequencing in
> Lenny, and the ordering worked because of these override files,
> dropping the override files might break the boot sequence handling
> completely, because the scripts would be assumed to have the default
> headers (start in runlevels 2-5, stop in runlevels 0, 1, 6 and depend
> on $remote_fs and $syslog. Existing scripts in rcS.d/ might still
> depend on these obsolete scripts, and a loop would be introduced by
> removing the overrides.
>
> The only way to avoid this would be to make sure the old init.d
> scripts are removed from /etc/init.d/, preferably by forcing the user
> to purge the old packages.
>
> Perhaps we should start warning users about these old packages and ask
> them to purge them if they exist? Or just remove the scripts ourself
> - bad and not allowed by policy? Or refuse to upgrade if these
> scripts are not purged - bad user experience? Not quite sure how to
> handle these old overrides for scripts in rcS.d/. A good start would
> probably be to make sure no existing packages have a relationship to
> these obsolete scripts.
I'd suggest that in the short term, insserv/sysvinit should refuse to
upgrade if you don't purge those packages. Long-term, maybe we need a
Conflicts-Purge field? ("Pre-Conflicts"?)
- Josh Triplett
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