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From: ron@BRL.ARPA (Ron Natalie)
Newsgroups: net.unix-wizards
Subject: Re:  System V and the Hangup Signal
Message-ID: <3531@brl-smoke.ARPA>
Date: Wed, 3-Sep-86 18:06:25 EDT
Article-I.D.: brl-smok.3531
Posted: Wed Sep  3 18:06:25 1986
Date-Received: Thu, 4-Sep-86 06:45:49 EDT
Sender: news@brl-smoke.ARPA
Lines: 5

After receiving a hang up signal, processes should neither try to
write anything on the terminal, nor try to open the tty or "/dev/tty"
device.  To do so will likely cause a hang on lines with modem control.

-Ron