Accessing Session Bus through the superuser

[Thiago Macieira]

Ozan Çağlayan wrote:
>Hi,
>
>I'm trying to access the Session Bus for sending notifications to
>desktop through the superuser. I wrote a python script which acts like a
>regular user which has an X Display and an address for accessing its
>session bus. It works perfectly when run as root:

Ok, stop.

That's not a good practice. Instead, let the user connect to the system 
bus and receive the notifications there. Do not push messages into the 
session bus.

If three users are logged in now, in 4 different sessions, how do you know 
which session bus to connect to? In most cases, you've chosen the wrong 
one, so do as I say: the user connects to the system bus.

> dbus.exceptions.DBusException:
>org.freedesktop.DBus.Error.Spawn.ExecFailed: dbus-launch failed to
>autolaunch D-Bus session: 6360: Autolaunch enabled (using X11).
>6360: --exit-with-session automatically enabled
>No protocol specified
>Autolaunch error: X11 initialization failed.

The X server refused the connection. In itself, it's not a D-Bus problem. 
But:

>It's trying to autolaunch a session bus using dbus-launch but it fails.
>
>What I can't understand is why "exporting an object over the system bus"
>is triggering this error?

I don't either. The environment variable you set with the D-Bus session's 
bus address did not take effect. Review your script to see if setting the 
environment is working.

-- 
  Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
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