From owner-freebsd-hackers@FreeBSD.ORG  Fri Nov  6 21:34:12 2009
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 8B8CF106566B
	for <freebsd-hackers@freebsd.org>; Fri,  6 Nov 2009 21:34:12 +0000 (UTC)
	(envelope-from a_best01@uni-muenster.de)
Received: from zivm-exrelay3.uni-muenster.de (ZIVM-EXRELAY3.UNI-MUENSTER.DE
	[128.176.192.20])
	by mx1.freebsd.org (Postfix) with ESMTP id 214698FC08
	for <freebsd-hackers@freebsd.org>; Fri,  6 Nov 2009 21:34:11 +0000 (UTC)
X-IronPort-AV: E=Sophos;i="4.44,695,1249250400"; d="scan'208";a="17811175"
Received: from zivmaildisp1.uni-muenster.de (HELO
	ZIVMAILUSER01.UNI-MUENSTER.DE) ([128.176.188.85])
	by zivm-relay3.uni-muenster.de with ESMTP; 06 Nov 2009 22:33:58 +0100
Received: by ZIVMAILUSER01.UNI-MUENSTER.DE (Postfix, from userid 149459)
	id 55C061B0766; Fri,  6 Nov 2009 22:33:58 +0100 (CET)
Date: Fri, 06 Nov 2009 22:33:57 +0100 (CET)
From: Alexander Best <alexbestms@math.uni-muenster.de>
Sender: <a_best01@uni-muenster.de>
Organization: Westfaelische Wilhelms-Universitaet Muenster
To: <freebsd-hackers@FreeBSD.org>
Message-ID: <permail-20091106213357f0889e84000012ed-a_best01@message-id.uni-muenster.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: 
Subject: SIGUNUSED
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 06 Nov 2009 21:34:12 -0000

some programmers tend to do the following in their apps to install a standard
handler for all signals (mostly SIG_IGN):

int counter;

for (counter = 1; counter < SIGUNUSED; counter++)
    signal(counter, SIG_IGN);

any objections if we also have SIGUNUSED in our signal.h? seems like a
reasonable addition. since the highest signal number (excluding
SIGRT[MIN|MAX]) is SIGTHR with 32 we could add

#define SIGUNUSED 33

alex.