Variety should detect logout and clean up quotes and clock

[Peter Levi]

We now properly handle SIGINT, SIGQUIT, SIGTERM and clean up.
However, this does not solve the issue with removing clock/quotes on session logout – it seems that in this case we don’t get any UNIX signals, we just get killed. The way to solve this seems to be to listen to DE-specific session-related events…

Some sample code here for PyGTK:
http://stackoverflow.com/questions/2490166/detect-user-logout-shutdown-in-python-gtk-under-linux-sigterm-hup-not-rece

[Peter Levi (peterlevi)]

https://developer.gnome.org/gtk3/3.3/GtkApplication.html#gtk-application-new

GtkApplication provides ways to inhibit the logout until we're done cleaning up. The question now is how to detect the user is actually logging out.

GEdit handles logout gracefully - we need to dig into its source.

[Ivo Anjo (knuckles)]

If I may add, I believe you can do operations on log-out by registering the app with a session manager (the register-session in GtkApplication).

After that you can get a signal, I believe quit-requested. The docs don't seem to mention that (...) but you can see it clearly in the patch that introduced it: https://mail.gnome.org/archives/commits-list/2012-January/msg03318.html .

[Peter Levi (peterlevi)]

"quit-requested" does not seem to be official API anymore: https://mail.gnome.org/archives/commits-list/2012-January/msg05551.html.
And same goes for "quit" signal: https://mail.gnome.org/archives/commits-list/2012-February/msg08022.html.
They don't mention what the replacement is.