How is xfce4-session-logout linked to the Quit action button?

[Nick Schermer]

2009/12/10 Chris G <cl at isbd.net>:
> I want to add to/customise the actions available when you click on the
> Quit button on the panel (the little green man).  How does the button
> link to xfce4-session-logout which is what pops up the window with the
> various possible actions.
>
> Is there a script in there somewhere or is the call of xfce4-session-logout
> hard coded?

It asks the session to logout through the sm protocol, see
libxfcegui4/libxfcegui4.session-client.c:logout_session().

Nick