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Date: Thu, 13 Mar 1997 20:14:05 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199703130914.UAA04699@godzilla.zeta.org.au>
To: andrew@ugh.net.au, j@uriah.heep.sax.de
Subject: Re: My child dosn't exit :-(
Cc: freebsd-hackers@freebsd.org
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
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>> > Look at the WCHAN message in a ps -alx
>> 
>> WCHAN  STAT COMMAND
>> ttywai SEs  (passwd)
>
>That means it hangs in an attempt to flush the output on the tty,
>during exit from the process.
>
>``Can't happen.'' :-)

Always happens if the output can't be flushed for some reason
(such as hung flow control).  comcontrol can be used to set a
timeout for the flush.

Bruce