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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.sources.bugs
Subject: Re: Compress  error messages
Message-ID: <6363@brl-smoke.ARPA>
Date: Sat, 29-Aug-87 19:16:37 EDT
Article-I.D.: brl-smok.6363
Posted: Sat Aug 29 19:16:37 1987
Date-Received: Sun, 30-Aug-87 09:58:30 EDT
References: <339@cbstr1.att.com> <209@ho7cad.ATT.COM> <865@percival.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 7

In article <865@percival.UUCP> nerd@percival.UUCP (Michael N. Galassi) writes:
>...no "sysexits.h"...

<sysexits.h> has nothing to do with error messages.  As others have
already explained, the "not a typewriter" syndrome is due to an
inappropriate call to perror() when errno just contains the dregs
of a much earlier test isatty() by the stdio package.