[systemd-devel] How can I simply check that a service has been restarted ?

[Francis Moreau]

On Tue, Nov 10, 2020 at 6:35 PM Luca Boccassi <bluca at debian.org> wrote:
>
> On Tue, 2020-11-10 at 17:22 +0000, Luca Boccassi wrote:
> > On Tue, 2020-11-10 at 18:12 +0100, Francis Moreau wrote:
> > > On Tue, Nov 10, 2020 at 2:43 PM Luca Boccassi <bluca at debian.org> wrote:
> > > > On Tue, 2020-11-10 at 11:50 +0100, Francis Moreau wrote:
> > > > > On Tue, Nov 10, 2020 at 11:30 AM Lennart Poettering
> > > > > <lennart at poettering.net> wrote:
> > > > > > On Di, 10.11.20 10:28, Francis Moreau (francis.moro at gmail.com) wrote:
> > > > > >
> > > > > > > Hello,
> > > > > > >
> > > > > > > After restarting a service with "systemctl try-restart ..." I want to
> > > > > > > verify that the service has been restarted.
> > > > > > >
> > > > > > > How can I reliably do this without using the dbus API ?
> > > > > >
> > > > > > D-Bus is how systemd exposes its state. If you don't want to use that,
> > > > > > you won't get the state information.
> > > > > >
> > > > >
> > > > > dbus is overkill for my little bash script.
> > > >
> > > > It's pretty simple, and a one-liner, to get the value of a property
> > > > from a bash script with busctl. Eg:
> > > >
> > > > $ busctl get-property org.freedesktop.systemd1 /org/freedesktop/systemd1/unit/gdm_2eservice org.freedesktop.systemd1.Service Restart
> > > > s "always"
> > > >
> > >
> > > Thank you but I'm not interested in the Restart property of a service,
> > > I want to know if a service as been restarted.
> >
> > It's just an example on how to get D-Bus data on units easily from a
> > bash script.
>
> Eg:
>
> $ busctl get-property org.freedesktop.systemd1 /org/freedesktop/systemd1/unit/gdm_2eservice org.freedesktop.systemd1.Service NRestarts
> u 0
>

I didn't know NRestart property, thanks. But it only counts automatic
restart, not manual one.

And also there's no need to use busctl, for getting service properties
I can use 'systemctl show -p'

-- 
Francis