[Pkg-sysvinit-devel] Future of update-rc.d in wheezy+1

[Roger Leigh]

On Fri, Jun 29, 2012 at 08:27:22PM +0100, Roger Leigh wrote:
> The following patch implements this behaviour.  While the insserv
> parsing logic has been tested, it's not been tested for upgrades
> or whether the whole script works correctly.
> 
> - it needs a Depends on insserv (>= $version_with_-s)
>   ==> this needs your feedback so it can be uploaded.
> - the preinst could be simplified to just use
>     update-rc.d "$script" -f defaults
>   if this is sufficient to update the sequence numbers in the
>   configuration.  This probably needs running in the postinst TBH.
> - this just replaces the defaults and user-provided start and stop
>   arguments with those provided by insserv.  Other than that, there
>   are no changes to anything else.
> - You might need to retain support for the old-style logic so that
>   if other scripts call update-rc.d in the gap between unpacking and
>   running the postinst, it won't fail.  Just back out the deletions
>   and run those blocks only if insserv didn't run or didn't find any
>   matches, which are a trivial addition to the script.
> 
> While this patch is just a proof a concept, this should be pretty much
> all you need.  It just needs checking and testing by someone with
> file-rc expertise.  If this could be done in the very near future,
> then that would be great.

I've attached an updated patch.  This patch

- Retains the old pre-insserv logic, and falls back to it if insserv
  is not available, or if insserv fails to find the script.  This is
  to aid the transition (between the new file-rc being configured and
  the postinst being run to migrate all the scripts), and should be
  removed in wheezy+1.
- Adds extra safeguards around the insserv logic, so it's only run
  if insserv is available.
- Moves the migration from the preinst to the postinst, since insserv
  is only available in the postinst.
- Still requires a package dependency on the fixed version of insserv.

Hope this is OK.  Still needs testing, BTW.  I'll take a look at that
tomorrow, time permitting.


Regards,
Roger

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