From owner-freebsd-questions  Sat Jul  5 07:06:50 1997
Return-Path: <owner-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id HAA06709
          for questions-outgoing; Sat, 5 Jul 1997 07:06:50 -0700 (PDT)
Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id HAA06704
          for <freebsd-questions@freebsd.com>; Sat, 5 Jul 1997 07:06:47 -0700 (PDT)
Received: from helbig.informatik.ba-stuttgart.de (rvc1.informatik.ba-stuttgart.de [141.31.112.22])
	by freefall.freebsd.org (8.8.6/8.8.5) with ESMTP id HAA08973
	for <freebsd-questions@freebsd.com>; Sat, 5 Jul 1997 07:06:36 -0700 (PDT)
Received: (from helbig@localhost)
	by helbig.informatik.ba-stuttgart.de (8.8.5/8.8.5) id QAA20037;
	Sat, 5 Jul 1997 16:06:29 +0200 (MET DST)
From: Wolfgang Helbig <helbig@MX.BA-Stuttgart.De>
Message-Id: <199707051406.QAA20037@helbig.informatik.ba-stuttgart.de>
Subject: Re: Where do I look to find system error defs?
In-Reply-To: <199707051316.GAA08831@freefall.freebsd.org> from Stan Brown at "Jul 5, 97 09:16:22 am"
To: stanb@netcom.com (Stan Brown)
Date: Sat, 5 Jul 1997 16:06:28 +0200 (MET DST)
Cc: freebsd-questions@freebsd.com
X-Mailer: ELM [version 2.4ME+ PL30 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

> 	What include file contains system errror number defs? I am trying to
> 	find out whatt an error 22 is for a select() call.

In the manual page for errno (man errno) you find that 22 is EINVAL, i. e.
invalid argument. Then ``man 2 select'' will tell you what this means in
the select(2) call.
You'll get a better error reporting from perror(3).

Wolfgang