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
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