Watchdog program

[Moore]

It seems like a program such as this should be very common:  does anyone have
a program (source, too, please!) to monitor terminal inactivity and shut down
any processes idle for a certain amount of time?  It would have to detect
processes that indicate Idle but really aren't (like a Kermit file transfer).

Target machine is an 11/750 running 4.3bsd (from Mt. Xinu).  Please forgive 
if this is a duplicate request, I may have already sent a query during the
panic phase of being assigned interim system administrator duties with no
experience....

Thanks for any assistance.

jim
moore at NCSC.navy.mil