From owner-freebsd-current@FreeBSD.ORG  Sun Jul  8 14:59:46 2007
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: freebsd-current@freebsd.org
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id E336016A46B
	for <freebsd-current@freebsd.org>; Sun,  8 Jul 2007 14:59:46 +0000 (UTC)
	(envelope-from ache@nagual.pp.ru)
Received: from nagual.pp.ru (nagual.pp.ru [194.87.13.69])
	by mx1.freebsd.org (Postfix) with ESMTP id 6411C13C457
	for <freebsd-current@freebsd.org>; Sun,  8 Jul 2007 14:59:45 +0000 (UTC)
	(envelope-from ache@nagual.pp.ru)
Received: from nagual.pp.ru (ache@localhost [127.0.0.1])
	by nagual.pp.ru (8.14.1/8.14.1) with ESMTP id l68ExG7J089033;
	Sun, 8 Jul 2007 18:59:16 +0400 (MSD)
	(envelope-from ache@nagual.pp.ru)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nagual.pp.ru;
	s=default; t=1183906757; bh=nq7z6bROJanaYhpI9bE2bq2JXhuX9+s8Wfa4zM3
	QCl8=; l=772; h=Received:Date:From:To:Cc:Subject:Message-ID:
	Mail-Followup-To:References:MIME-Version:Content-Type:
	Content-Disposition:In-Reply-To:User-Agent; b=GEsGQVPC9MWTr4lEVi9t
	uxrSm6engFj+iyhQGp02XrfdmQGEtHkPpNSTrFk6C1ocVBMXcxr2lHfk+UTQi2Nwvt0
	vZbOPYbSnNms0fnVPa9QjXBMnjixuleNN3tkD7EWh97WSA8l7GutVwQ7dP3VDvLVyRv
	ir+8gkFabimQGi9og=
Received: (from ache@localhost)
	by nagual.pp.ru (8.14.1/8.14.1/Submit) id l68ExGgB089031;
	Sun, 8 Jul 2007 18:59:16 +0400 (MSD) (envelope-from ache)
Date: Sun, 8 Jul 2007 18:59:16 +0400
From: Andrey Chernov <ache@nagual.pp.ru>
To: Dirk Meyer <dirk.meyer@dinoex.sub.org>
Message-ID: <20070708145916.GA88793@nagual.pp.ru>
Mail-Followup-To: Andrey Chernov <ache@nagual.pp.ru>,
	Dirk Meyer <dirk.meyer@dinoex.sub.org>, freebsd-current@freebsd.org
References: <20070703182400.Q1449@baba.farley.org>
	<Xuu8UV3Bay@dmeyer.dinoex.sub.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <Xuu8UV3Bay@dmeyer.dinoex.sub.org>
User-Agent: Mutt/1.5.16 (2007-06-09)
Cc: freebsd-current@freebsd.org
Subject: Re: HEADS UP:  getenv() and family API change
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 08 Jul 2007 14:59:47 -0000

On Sun, Jul 08, 2007 at 04:13:49PM +0200, Dirk Meyer wrote:
> Hallo Sean C. Farley,
> 
> > Changes in moving to POSIX from historic BSD API:
> >    b. putenv takes a char * instead of const char *.
> >    c. putenv no longer makes a copy of the input string.
> 
> Can you give more details?
> 

See POSIX description
http://www.opengroup.org/onlinepubs/009695399/functions/putenv.html

> An application will break in using this:
> putenv("PATH=/bin")
> 
> now taking a char *, this will break with gcc42.

No break, this is illegal call (because this const _contents_ may be 
changed with the yet one putenv call).

Why do you think gcc uses
tlink.c: putenv (xstrdup ("COMPILER_PATH="));
in its own internal code? (like many others)

-- 
http://ache.pp.ru/