Need help: Idle X-user?

[Dennis Stampfer <seppy@debian.org>]

Hi -devel,

the program timeoutd was originally written when using X was not a matter
of course:

timeoutd loggs user out when they reached timeout-restrictions like max.
login-time, max. idle-time, etc.

Some users asked for X-Support. Well, X works well with "No login
allowed at all" and "Login restricted to max. X minutes", but it does
not work with "Logout, when user U was idle Yminutes.
Support for X and "idle-logout" is not included within timeoutd. My
question is:

Is there any way to querry how long a X-user is idle? If not, do you
think it's okay to write something like "IDLE-Logout does not work
with X" into Readme.Debian and into the config-file(,manpage, ...)?

I found no way to check if a user is idle without using extra libraries,
and if I use extra libaries, new depencies are needed wich users don't
need if they have no X on their box. (these extra-depencies may depend
on X, so they need X, etc...)

thank you,
Dennis