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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: net.unix-wizards
Subject: Re: System V and SIGCLD
Message-ID: <863@brl-smoke.ARPA>
Date: Thu, 15-May-86 00:17:30 EDT
Article-I.D.: brl-smok.863
Posted: Thu May 15 00:17:30 1986
Date-Received: Sun, 25-May-86 11:42:09 EDT
References: <709@cheviot.uucp> <211@altos86.altos86.UUCP>
Reply-To: gwyn@brl.ARPA
Organization: Ballistic Research Lab (BRL)
Lines: 10

In article <211@altos86.altos86.UUCP> andy@altos86.UUCP (Andy Hatcher) writes:
>P.S.  I've always been told that it is a bad idea to put printfs in
>a signal handling routine.   The signal handler is called asyncronously
>and if you use stdio both inside and outside the signal handler you
>could make it very confused.

UNIX System V Release 2 tries very hard to make stdio support
usage from inside signal catchers.  I think this was a big
mistake, as it turned Dennis's clean stdio source code into
a complicated mess.