Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.questions
Subject: Re: idle time
Message-ID: <7263@auspex.auspex.com>
Date: 19 Apr 91 18:35:29 GMT
References: <1991Apr17.024209.1056@nmt.edu> <1991Apr17.150347.29858@logixwi.uucp>
Organization: Auspex Systems, Santa Clara
Lines: 9

>	Try having a look at the modification times of the user's 
>	/dev/tty* file.

Try having a look at the *access* time instead; that's the way all the
programs *I* know of that find "idle time" do it (the theory is that
they want the *user's* idle time, i.e. the time since they last asked
the system to do something, and the access time on the tty device gets
updated whenever a "read()" completes on that device, i.e. when
something to read becomes available because the user typed it).