[RFC]: Enhanced User Sessions and session shutdown

[James Hunt]

I've recently updated the spec above to include details of session shutdown [1].
If anyone has comments, please weigh in:

https://wiki.ubuntu.com/FoundationsTeam/Specs/RaringUpstartUserSessions#Desktop_Session_Shutdown

Note that on Ubuntu, when the gnome-session job ends, gnome-session will
potentially first signal ConsoleKit to shutdown the system. This will ultimately
result in the display manager (lightdm on Ubuntu) sending SIGTERM to each
Session Init [2] which should preclude the need for a final "shutdown" job that
reacts to the session-exiting event, although it may be necessary to modify the
'kill timeout' for the lightdm job.

Kind regards,

James.

[1] - Note that this *only* applies to Upstart running as a Session Init (as a
non-privileged user) although ideally the design will be flexible enough to
support a 'Pure Upstart' system shutdown sequence in the future (for Ubuntu).
[2] - Which will need to be changed to not re-exec on receipt of that signal.

--
James Hunt
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http://upstart.ubuntu.com/cookbook
http://upstart.ubuntu.com/cookbook/upstart_cookbook.pdf