On Tue, Mar 05, 2019 at 05:58:30PM +0100, Michael Biebl wrote:
> Am 05.03.19 um 15:34 schrieb Mark Hindley:
> > 
> > reassign -1 elogind
> > retitle -1 Make libelogind0 ABI compatible with libsystemd0
> > tags -1 + pending
> > thanks
> > 
> > On Wed, Feb 27, 2019 at 05:12:50PM +0000, Mark Hindley wrote:
> >> We are currently liasing with elogind upstream who are making libelogind 
> >> ABI
> >> compatible with libsystemd. See 
> >> https://github.com/elogind/elogind/issues/97
> > 
> > ABI compatibility between libelogind.so and libsystemd.so is complete 
> > upstream.
> > Initial testing with the necessary symlinks now produces full function with
> > stock policykit-1.
> 
> Can you eloborate on that a bit?
> Why exactly is libelogind0 needed at all in Debian, where we have
> libsystemd0?

Because the elogind implementation of sd-login is necessarily different. For
example, elogind doesn't support the concept of slices or scopes.

> I would very much prefer if we could simply drop libelogind0 and make
> sure elogind + libsystemd0 works. Has this route been tried?

Yes. It can't work. See 
https://github.com/elogind/elogind/issues/95#issuecomment-438335747

> It sounds like you want to make libelogind0 Conflicts/Replaces/Provides:
> libsystemd0.

Yes, versioned provides.

> This has the potential for some interesting breakage, like the real
> systemd being installed and used together with libelogind0.
> We would need to make sure something like that can never happen (ideas
> how to solve that?)

Obviously that wouldn't work.

At the moment elogind conflicts with systemd and depends on libelogind0. So you
either end up with systemd + libsystemd0 or elogind + libelogind0. But to be
sure we could add libelogind0 conflicts systemd?

Mark

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