On Mon, Jul 18, 2016 at 4:30 PM, Holger Kiehl <holger.ki...@dwd.de> wrote:
>
> I am beginning to wonder, even if I write proper unit files (using templates),
> the user is allowed to start and stop his AFD, either via command line or GUI.
> If he now does it with the provided tools, the process will again end up in
> the user.slice. Unless he uses systemctl, ie. I have to rewrite the command
> line for starting+stopping to use systemctl, so the user does not have to
> change anything.
>

Yes, that's correct.

> Is there no way one can tell systemd to just run a command at start and
> when it stops, waiting for the command to complete?

That's what systemd does by default, no? This is what service is about.

> I do not need any
> of those 'babysitting' services of systemd. In fact I don't want them.
> init_afd takes care of this.
>

In this case you should write your service definition so that init_afd
becomes main PID. That will provide for proper stop and cleanup.

> But I have users that run multiple AFD's under one user, each in their on
> working directory. Can this be done, without having to manually write a
> unit file for each AFD instance?

Yes, of course, that is what templates are intended for. If you have
template afd@.service, users can then use "systemctl start
afd@instance.service" and this will be instantiated on the fly - no
need to actually have file with this name anywhere (or you can link
afd@instance.service -> afd@.service). Interpretation of instance name
(string between "@" and ".") is entirely up to you.
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