From owner-freebsd-stable@FreeBSD.ORG  Tue Apr  4 09:31:04 2006
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id CECCD16A41F
	for <freebsd-stable@freebsd.org>; Tue,  4 Apr 2006 09:31:04 +0000 (UTC)
	(envelope-from peterjeremy@optushome.com.au)
Received: from mail13.syd.optusnet.com.au (mail13.syd.optusnet.com.au
	[211.29.132.194])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 068C843D5C
	for <freebsd-stable@freebsd.org>; Tue,  4 Apr 2006 09:31:02 +0000 (GMT)
	(envelope-from peterjeremy@optushome.com.au)
Received: from turion.vk2pj.dyndns.org
	(c220-239-19-236.belrs4.nsw.optusnet.com.au [220.239.19.236])
	by mail13.syd.optusnet.com.au (8.12.11/8.12.11) with ESMTP id
	k349Uxpa023327
	(version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO);
	Tue, 4 Apr 2006 19:31:01 +1000
Received: from turion.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1])
	by turion.vk2pj.dyndns.org (8.13.4/8.13.4) with ESMTP id k349Uwnv050683;
	Tue, 4 Apr 2006 19:30:58 +1000 (EST)
	(envelope-from peter@turion.vk2pj.dyndns.org)
Received: (from peter@localhost)
	by turion.vk2pj.dyndns.org (8.13.4/8.13.4/Submit) id k349Uw7v050682;
	Tue, 4 Apr 2006 19:30:58 +1000 (EST) (envelope-from peter)
Date: Tue, 4 Apr 2006 19:30:58 +1000
From: Peter Jeremy <peterjeremy@optushome.com.au>
To: "Marc G. Fournier" <scrappy@postgresql.org>
Message-ID: <20060404093058.GF683@turion.vk2pj.dyndns.org>
References: <Pine.GSO.4.43.0604030817090.21105-100000@sea.ntplx.net>
	<20060403140902.C947@ganymede.hub.org>
	<20060403182504.S76562@fledge.watson.org>
	<20060403144916.J947@ganymede.hub.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20060403144916.J947@ganymede.hub.org>
X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc
User-Agent: Mutt/1.5.11
Cc: freebsd-stable@freebsd.org
Subject: Re: [HACKERS] semaphore usage "port based"?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 04 Apr 2006 09:31:04 -0000

On Mon, 2006-Apr-03 14:55:10 -0300, Marc G. Fournier wrote:
>That is all I'm advocatin / asking for ... some way of reverting kill(PID, 
>0) back to the old, FreeBSD 4.x behaviour, where this works beautifully :( 
>At least until someone does get around to 'virtualization of SysV IPC' :(

There's the old standby: You have the source code.

You should be able to get things to work by expanding prison_check()
into cr_cansignal() and changing the error return from ESRCH to EPERM.
Having not tried this, I can't comment on possible adverse side-effects.

-- 
Peter Jeremy