Path: utzoo!mnetor!uunet!husc6!rutgers!mcnc!decvax!dartvax!andyb
From: andyb@dartvax.UUCP (Andy Behrens)
Newsgroups: comp.unix.questions
Subject: Re: stty 0
Message-ID: <7783@dartvax.UUCP>
Date: 19 Dec 87 01:40:35 GMT
References: <2412@homxc.UUCP>
Reply-To: andyb@burlcoat.uucp (Andy Behrens)
Organization: Dartmouth College, Hanover, NH
Lines: 23
Keywords: bye

In article <2412@homxc.UUCP> ldm@homxc.UUCP (the wharf rat) writes:
> I work on a switching system that doesn't drop the line when I log 
> off.  So I wrote a short one to stty 0:
>	[program omitted]
> and trap 0 "bye" in .profile.  Right?  Wrong.  I still (sometimes!)
> get another login: .  Of course, stty 0 from the shell works every time...
>
> What's going on ?

Your program is correctly dropping the line.  Unfortunately, as soon as it
and your shell terminate, the system starts up another copy of getty.  What's
the first thing that getty does?  It resets the line to its normal state.
That usually happens fast enough that the switching system doesn't see that
the line has dropped.

Your program could call sleep() before it exits.  You don't need to write any
C, though -- just trap 'stty 0;sleep 3' 0.   

					Andy Behrens

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