From owner-freebsd-current@FreeBSD.ORG  Mon Jan  3 20:01:17 2011
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0022B106566C
	for <freebsd-current@freebsd.org>; Mon,  3 Jan 2011 20:01:16 +0000 (UTC)
	(envelope-from bakul@bitblocks.com)
Received: from mail.bitblocks.com (mail.bitblocks.com [64.142.15.60])
	by mx1.freebsd.org (Postfix) with ESMTP id D500B8FC12
	for <freebsd-current@freebsd.org>; Mon,  3 Jan 2011 20:01:16 +0000 (UTC)
Received: from bitblocks.com (localhost.bitblocks.com [127.0.0.1])
	by mail.bitblocks.com (Postfix) with ESMTP id F2FCA5B30;
	Mon,  3 Jan 2011 11:53:50 -0800 (PST)
To: Anonymous <swell.k@gmail.com>
In-reply-to: Your message of "Mon, 03 Jan 2011 22:21:51 +0300."
	<8639p923ow.fsf@gmail.com> 
References: <4D1B0E41.40405@gmail.com> <ifsi3f$5ub$1@dough.gmane.org>
	<4D21CC35.5060803@gmx.de>
	<20110103141830.GC3140@deviant.kiev.zoral.com.ua>
	<47B52F19-AB6B-4116-9F5E-219B26519115@FreeBSD.org>
	<F5FB1B76-21A9-42E6-8294-BA4F6E8EA8DA@gmail.com>
	<86vd256e85.fsf@gmail.com>
	<20110103190245.4AA005B30@mail.bitblocks.com>
	<8639p923ow.fsf@gmail.com>
Comments: In-reply-to Anonymous <swell.k@gmail.com>
	message dated "Mon, 03 Jan 2011 22:21:51 +0300."
Date: Mon, 03 Jan 2011 11:53:50 -0800
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20110103195350.F2FCA5B30@mail.bitblocks.com>
Cc: freebsd-current@freebsd.org
Subject: Re: No human readable message with g_vfs 
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: Mon, 03 Jan 2011 20:01:17 -0000

On Mon, 03 Jan 2011 22:21:51 +0300 Anonymous <swell.k@gmail.com>  wrote:
> Bakul Shah <bakul@bitblocks.com> writes:
> 
> > On Mon, 03 Jan 2011 21:20:42 +0300 Anonymous <swell.k@gmail.com>  wrote:
> >>=20
> >> Do you mean perror(1)?
> >>=20
> >>   $ perror 5
> >>   Input/output error
> >
> > I prefer mine:
> >
> > $ errno () { grep "^#.*\\<$*\\>" /usr/include/sys/errno.h }
> > $ errno 5
> > #define EIO             5               /* Input/output error */
> > $ errno EIO
> > #define EIO             5               /* Input/output error */
> 
> perror(1) displays localized messages
> 
>   $ LANG=3Dja_JP.UTF-8 perror 5
>   =E5=85=A5=E5=87=BA=E5=8A=9B=E3=82=A8=E3=83=A9=E3=83=BC=E3=81=A7=E3=81=99
> 
>   $ LANG=3Duk_UA.UTF-8 perror 5
>   =D0=9F=D0=BE=D0=BC=D0=B8=D0=BB=D0=BA=D0=B0 =D0=B2=D0=B2=D0=BE=D0=B4=D1=83=
> -=D0=B2=D0=B8=D0=B2=D0=BE=D0=B4=D1=83

Yes, definitely useful. Perhaps strerror would be a better name?

> but I have to agree that knowing errno macro is useful

And you can use grep tricks :-)

$ errno '[dD]evice'
#define ENXIO           6               /* Device not configured */
#define ENOTBLK         15              /* Block device required */
#define EBUSY           16              /* Device busy */
#define EXDEV           18              /* Cross-device link */
#define ENODEV          19              /* Operation not supported by device */
#define ENOTTY          25              /* Inappropriate ioctl for device */
#define ENOSPC          28              /* No space left on device */