[systemd-devel] Translating --machine parameter to a service file

[Lennart Poettering]

On Di, 25.01.22 13:04, Tomáš Hnyk (tomashnyk at gmail.com) wrote:

> Hello,
> I want to run a script invoked by udev to run a pactl script. I am now using
> a udev rule SUBSYSTEM=="drm", ACTION=="change",
> RUN+="/usr/local/bin/my_script"
>
> which calls (drew is my username):
> systemctl --machine=drew at .host --user --now my.service
>
>
> which has:
> [Service]
> Type=oneshot
> ExecStart=/usr/local/bin/my_script.py
>
> and in the my_script.py, I do what I need. I cannot call my_script.py
> directly
> from the udev rule because, if I understood it correctly, scripts triggered
> by udev run in a limited environment and pactl runs as user.
>
> Needless to say, this feels rather hackish. Ideally I would use something
> like TAG+="systemd",  ENV{SYSTEMD_WANTS}="my.service"
>
> I can specify "User=" in the service file but I could not figure out
> to translate the --machine=drew at .host parameter to it.

This is not supported. Containers run in their own little world, and
generally get their own devices (i.e. just virtual devices such as
/dev/null and similar), hence we do not have infra to propagate evnts
to containers.

Lennart

--
Lennart Poettering, Berlin