[systemd-devel] How to have systemd --user instance share the same environment variables as the X server?

[Mantas Mikulėnas]

On Sun, Feb 26, 2017 at 11:10 PM, Patrick Schleizer <
patrick-mailinglists at whonix.org> wrote:

> Being on Debian stretch (Qubes). The display manager there does not yet
> get started by systemd --user.
>
> I find it useful to convert /etc/xdg/autostart/app.desktop files to
> systemd --user unit files.
>
> Therefore the environment variables have to be sorted out. On any Linux
> we would have to set at least DISPLAY as well as XAUTHORITY.
>
> On Qubes however, we need a few more environment variables. We need also
> QT_X11_NO_MITSHM=1 and may need a few others ones.
>
> Now, before I go through them manually and then have this break in
> future when more/different environment variables are needed...
>
> Is there a way to have the systemd --user session share the same
> variables as the X server? Writing a parser for /etc/X11/Xsession.d/
> seems wrong. Am I missing some tool to do that?
>
> Would I add something like this?
>
> ExecStartPre=dbus-update-activation-environment --systemd --all
>

Those don't sound like X server variables – they're X *client* variables,
aren't they?

If you're in charge of the distro, and if the variables are fairly static,
a) set them via the pam_env PAM module (i.e. /etc/environment),
or b) set them with Environment= in "user at .service".

That said, in many distributions Xsession already calls
`dbus-update-activation-environment…` right after having sourced all the
Xsession.d scripts.

-- 
Mantas Mikulėnas <grawity at gmail.com>
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