[systemd-devel] At wits end... need to execute a script prior to anything getting killed/changed on reboot/shutdown

[Lennart Poettering]

On Do, 17.01.19 11:17, Christopher Cox (ccox at endlessnow.com) wrote:

> > > [Install]
> > > WantedBy=multi-user.target
> > >
> > > In my case, my script rolls through the currently running processes, looking
> > > for certain ones, determines listening port (ss) and gets the time the
> > > process was started (stat) and outputs info to a file.
> > >
> > > What I'm seeing is a file at shutdown that does not contain all the
> > > processes.
> > Hmm, what kind of processes are you missing? user session stuff? How
> > do you shut down? Note that display managers are likely to terminate
> > the user sessions first, and only initiate system shutdown then...
>
> These are nohup'd background processes not tied to any tty.

Well, how is that stuff started? Note that if systemd --user or
--system manages your process then it will keep track of it through
cgroups, and "nohup" is not a concept for evading that.

Lennart

--
Lennart Poettering, Red Hat