[systemd-devel] Conditional clean up action

[Mircea Husz]

On Mon, 2018-01-08 at 20:01 +0100, Lennart Poettering wrote:
> On Fr, 05.01.18 13:04, Mircea Husz (mirceahusz at yahoo.com) wrote:
> 
> > On Fri, 2018-01-05 at 09:55 +0100, Michal Sekletar wrote:
> > > On Thu, Jan 4, 2018 at 9:50 PM, Mircea Husz <mirceahusz at yahoo.com
> > > >
> > > wrote:
> > > > Migrating an init script to systemd, and need to archive logs
> > > > only
> > > > if the
> > > > service exited normally with a return code 0. I found
> > > > $SERVICE_RESULT,
> > > > $EXIT_CODE, and $EXIT_STATUS  but they are in a newer version
> > > > of
> > > > systemd, I
> > > > am stuck with version 219 on CentOS 7.
> > > > 
> > > > I'd love to run ExecStopPost on a conditional exit status but
> > > > that's just
> > > > not available. Before I get creative with Pre, Start, and Post
> > > > bash
> > > > scripts,
> > > > is there any straightforward way of handling this kind of thing
> > > > with systemd
> > > > ?
> > > 
> > > You could query the exit code in post script via systemctl show,
> > > the
> > > property is called ExecMainCode. Btw, in case you have RH
> > > subscription
> > > then please open a support case and we can backport this
> > > functionality
> > > to RHEL/CentOS.
> > > 
> > > Cheers,
> > > 
> > > Michal
> > 
> > Thank you, you're getting me on the right path. I found that
> > ExecMainCode returned 1 when the process
> >  was brought down gracefully, but in the process (no pun intended)
> > of
> > testing I discovered ExecMainStatus. 
> > Its value is 0 on normal termination, and non-zero when I cause it
> > to
> > crash. However this might be all 
> > coincidental and don't want to infer what the properties mean based
> > on
> > these observations.
> > 
> > They do seem to mirror the values listed in systemd status output,
> > as
> > in: (code=exited, status=0/SUCCESS)
> > 
> > I'd like to find documentation on these properties and didn't find
> > any;
> > can you point me in the right direction?
> 
> You may find (not very up-to-date) docs about those properties here:
> 
> https://www.freedesktop.org/wiki/Software/systemd/dbus/
> 
> Lennart

Thank you
-Mike
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