[Pkg-sysvinit-devel] Bug#521562: please parse LSB headers

[Jordi Pujol]

A Dijous 27 Gener 2011 18:17:08, Joey Hess va escriure:
> Jordi Pujol wrote:
> > now the default behaviour for update-rc.d  with option "defaults" is
> > parse the LSB Headers, therefore we can leave blank the options for
> > dh_installlinit and it will pass the option "defaults" to update-rc.d,
> > but when update-rc.d works in legacy mode, dh_installinit should write
> > the start and stop values, obtained from parsing the LSB headers.
> 
> If the LSB Default-Start and Default-Stop headers can be trusted,
> why does "update-rc.d defaults" not already parse and use those in
> legacy mode?
> 
> I don't like adding yet another parser for this, and it seems it should
> be up to update-rc.d to decide whether to use those headers or not. My
> suspicion is that, since they are unused, they probably are less correct
> than the default "defaults" behavior in most cases, and that by using
> this unverified infomation source, debhelper would break a lot of
> packages. Can you prove otherwise?
Yes, you are right, if update-rc.d could parse the headers for defaults in any 
mode, then the change in dh_installinit is not needed.
Also, thinking about my modification, it has a problem because is wrong to 
suppose a sequence number to start and stop, must be computed regarding the 
sequences for other services, or in the same manner as insserv does, when 
installing.

> 
> It does seem that by making most systems use dependency based boot,
> while leaving a fraction in legacy mode, we now have a situation where
> the legacy mode is going to tend to bit-rot, since it is a) hard to
> maintain and b) won't get wide use and testing. But I don't see this
> change to debhelper signifiantly ammeloriating that problem, and it
> could easily make it much worse.

Yes, modifying update-rc.d to allways parse defaults will easy development of 
packages, maybe the answer is declare obsolete the legacy mode or use insserv 
to compute the sequences even in legacy mode.

Jordi Pujol

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