From owner-cvs-src@FreeBSD.ORG  Wed Jan 25 19:15:58 2006
Return-Path: <owner-cvs-src@FreeBSD.ORG>
X-Original-To: cvs-src@FreeBSD.org
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 2E02D16A41F;
	Wed, 25 Jan 2006 19:15:58 +0000 (GMT)
	(envelope-from phk@critter.freebsd.dk)
Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 3682B43D46;
	Wed, 25 Jan 2006 19:15:49 +0000 (GMT)
	(envelope-from phk@critter.freebsd.dk)
Received: from critter.freebsd.dk (unknown [192.168.48.2])
	by phk.freebsd.dk (Postfix) with ESMTP id 81B43BC74;
	Wed, 25 Jan 2006 19:15:48 +0000 (UTC)
To: Julian Elischer <julian@elischer.org>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 25 Jan 2006 10:49:28 PST."
	<43D7C838.4000202@elischer.org> 
Date: Wed, 25 Jan 2006 20:15:47 +0100
Message-ID: <19618.1138216547@critter.freebsd.dk>
Sender: phk@critter.freebsd.dk
Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/include printf.h src/lib/libc/stdio
	Makefile.inc xprintf.c xprintf_errno.c xprintf_quote.c
	xprintf_vis.c 
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 25 Jan 2006 19:15:58 -0000

In message <43D7C838.4000202@elischer.org>, Julian Elischer writes:
>Poul-Henning Kamp wrote:

>>  FreeBSD src repository
>>
>>  Modified files:
>>    include              printf.h 
>>    lib/libc/stdio       Makefile.inc xprintf.c xprintf_vis.c 
>>  Added files:
>>    lib/libc/stdio       xprintf_errno.c xprintf_quote.c 
>>  Log:
>>  Make the %V{is} extension handle a NULL pointer like %s does: output "(null)"
>>  
>>  Add %M{essage} extension which prints an errno value as the
>>  corresponding string if possible or numerically otherwise.
>
>Is this compatible with anyone else?

Not that I know off.  It is an optional extension which you have to
ask for explicitly, so it is non-intrusive as far as stadnards go.

>basically, did this idea come from somewhere? or is it new?

Extending printf is as old as at least SYSIII.

The specific implementation was written to be compatible with GLIBC.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.