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I'm new with dbus(Using Ubuntu 14.04, Unity). So I'm logged with user A, create process as user B and that process creates session for user B, now I want to use dbus messages to shut down session from that process for user B. I want my process to work on every desktop env. So I have download tool called d-feet, and started to play with it, I've noticed that everytime session is created in system /org/freedesktop/User/1002 is added(1002 is UID for user B) in org.freedesktop.login1.
So I tried to launch:
sudo dbus-send --type=method_call --print-reply --system --dest=org.freedesktop.login1 /org/freedesktop/login1/user/1000 org.freedesktop.login1.User.Terminate
But it gives me error saying Error org.freedesktop.DBus.Error.UnknownObject: Unknown user, I used ctr+alt+f1 login in as user B, launched startx and from user A-s desktop I used same command, it gives error saying 'GDBus.Error:org.freedesktop.DBus.Error.UnknownObject: Permission Denied' But this time it works(shuts downs session). I'm little lost. Hope you can help. Thanks.

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