From owner-freebsd-hackers@FreeBSD.ORG  Mon Jul  6 13:22:25 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 8F63E1065676
	for <freebsd-hackers@freebsd.org>; Mon,  6 Jul 2009 13:22:25 +0000 (UTC)
	(envelope-from rb@gid.co.uk)
Received: from mx0.gid.co.uk (mx0.gid.co.uk [194.32.164.250])
	by mx1.freebsd.org (Postfix) with ESMTP id 138CE8FC21
	for <freebsd-hackers@freebsd.org>; Mon,  6 Jul 2009 13:22:24 +0000 (UTC)
	(envelope-from rb@gid.co.uk)
Received: from gidgate.gid.co.uk (80-46-130-69.static.dsl.as9105.com
	[80.46.130.69])
	by mx0.gid.co.uk (8.14.2/8.14.2) with ESMTP id n66D5SSN049919;
	Mon, 6 Jul 2009 14:05:28 +0100 (BST) (envelope-from rb@gid.co.uk)
Received: from [192.168.2.3] (host86-150-28-49.range86-150.btcentralplus.com
	[86.150.28.49])
	by gidgate.gid.co.uk (8.13.8/8.13.8) with ESMTP id n66D5Mmt038464;
	Mon, 6 Jul 2009 14:05:22 +0100 (BST) (envelope-from rb@gid.co.uk)
Message-Id: <F8DAE450-4157-4DE7-BE80-13D237A3768C@gid.co.uk>
From: Bob Bishop <rb@gid.co.uk>
To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no>
In-Reply-To: <86hbxqgg8v.fsf@ds4.des.no>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (Apple Message framework v935.3)
Date: Mon, 6 Jul 2009 14:05:17 +0100
References: <permail-20090704224845f0889e84000046f1-a_best01@message-id.uni-muenster.de>
	<3a142e750907041727l6fac4b67m33973ec352664c6b@mail.gmail.com>
	<86hbxqgg8v.fsf@ds4.des.no>
X-Mailer: Apple Mail (2.935.3)
Cc: freebsd-hackers@freebsd.org,
	Alexander Best <alexbestms@math.uni-muenster.de>,
	"Paul B. Mahol" <onemda@gmail.com>
Subject: Re: mmap/munmap with zero length
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: Mon, 06 Jul 2009 13:22:25 -0000

Hi,

On 6 Jul 2009, at 13:14, Dag-Erling Sm=F8rgrav wrote:

> Allocating or mapping a zero-length region is not necessarily a bug.

POSIX says it is, IIRC.

--
Bob Bishop
rb@gid.co.uk