Setting dconf values as admin

[Josef Wolf]

Hello,

On Wed, Oct 25, 2017 at 01:51:38PM +0200, Ralf Mardorf wrote:
> On Wed, 25 Oct 2017 13:26:26 +0200, Josef Wolf wrote:
> >  https://wiki.gnome.org/action/show/Projects/dconf/SystemAdministrators?action=show&redirect=dconf%2FSystemAdministrators

I keep this link as a reference

> >  $ sudo cat /etc/dconf/db/ibus.d/01-cfsvn-global-defaults
> >  [org/gnome/desktop/background]
> >  picture-uri='file:///etc/lightdm/my-wallpaper.jpg'
> >
> >But this don't seem to have any effect. I have run "dconf update" as
> >root and as ordinary user. Still no effect.

This was my original attempt

> sudo -u user_name dbus-launch dconf load /org/gnome/desktop/background/ < /etc/dconf/db/ibus.d/01-cfsvn-global-defaults
> 
> or
> 
> cat /etc/dconf/db/ibus.d/01-cfsvn-global-defaults | sudo -u user_name dbus-launch dconf load /org/gnome/desktop/background/
> 
> resp. depending on the read permissions
> 
> sudo cat /etc/dconf/db/ibus.d/01-cfsvn-global-defaults | sudo -u user_name dbus-launch dconf load /org/gnome/desktop/background/

All of those methods have the same problem:

If the user already has a dbus session runnning, a new dbus connection will be
started. Write operations on this new dbus session will go to /dev/null.

Thus, what I am looking for is:
- if the user already has a dbus session running, connect to this already
  existing dbus session
- if there is no dbus session for this user, create a new one

What would be the clean way to do this?

-- 
Josef Wolf
jw at raven.inka.de