autologout for unix/sunos?

[General Dynamics Corp]

OK wizards this is a challenge.
Should you choose to accept it you are hereby challenged to point me in the 
right direction toward an autologout feature that is clean for sun/os.

What I am looking for is a clean logout of all processes/sub-processes
that:
     1) are connected with a terminal session.
     2) are found to be inactive for x minutes.
     3) are on particular tty lines.
     4) have some warning feature for x-5 minutes.


Has anybody got it now?
Is it a commercial/free product easily available?
Is someone willing to write one for publication?

advaTHANXnce,

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Robin Handelman
gdls system administrator
General Dynamics Land Systems Division
Yes we build the M1A1 tank!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

the usual disclaimer: