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

[Christopher Cox]

On 1/17/19 11:59 AM, Lennart Poettering wrote:
> 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.

Nohup'd processes started by an ssh as a user.  Process "parent" pid 1.