[systemd-devel] Still confused with socket activation

[Benjamin Berg]

On Wed, 2021-02-03 at 08:00 +0100, Reindl Harald wrote:
> 
> 
> Am 02.02.21 um 22:25 schrieb Benjamin Berg:
> > On Tue, 2021-02-02 at 22:50 +0300, Andrei Borzenkov wrote:
> > > 02.02.2021 17:59, Lennart Poettering пишет:
> > > > 
> > > > Note that Requires= in almost all cases should be combined with
> > > > an
> > > > order dep of After= onto the same unit.
> > > 
> > > Years ago I asked for example when Requires makes sense without
> > > After.
> > > Care to show it? I assume you must have use case if you say "in
> > > almost all".
> > 
> > In the GNOME systemd units there are a few places where a Requires=
> > is
> > combined with Before=
> 
> sounds like complete nonsense
> 
> you can not require something at your own to be there but on the other 
> hand start before it - at least by common sense

The units are indeed non-trivial. I have put in a lot of effort to find
a solution that both works and is robust in various failure modes. It
may well be that there is a better approach with similar properties.
But, session login and logout(!) is not quite as trivial as one could
hope for unfortunately (backward compatibility and workarounds add some
complexities).

So, I would love to be educated on how to simplify all this while still
catching the various corner cases. But in order to convince me, you'll
need to make a more concrete suggestion and explain its properties.

Benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: This is a digitally signed message part
URL: <https://lists.freedesktop.org/archives/systemd-devel/attachments/20210203/54476589/attachment.sig>