From owner-freebsd-questions@FreeBSD.ORG  Mon Nov  7 02:32:03 2011
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C5502106566C
	for <freebsd-questions@freebsd.org>;
	Mon,  7 Nov 2011 02:32:03 +0000 (UTC)
	(envelope-from freebsd@edvax.de)
Received: from mx02.qsc.de (mx02.qsc.de [213.148.130.14])
	by mx1.freebsd.org (Postfix) with ESMTP id 8A3DC8FC13
	for <freebsd-questions@freebsd.org>;
	Mon,  7 Nov 2011 02:32:03 +0000 (UTC)
Received: from r56.edvax.de (port-92-195-104-16.dynamic.qsc.de [92.195.104.16])
	by mx02.qsc.de (Postfix) with ESMTP id CA47B1E16A;
	Mon,  7 Nov 2011 03:31:56 +0100 (CET)
Received: from r56.edvax.de (localhost [127.0.0.1])
	by r56.edvax.de (8.14.5/8.14.5) with SMTP id pA72VtmK004437;
	Mon, 7 Nov 2011 03:31:56 +0100 (CET) (envelope-from freebsd@edvax.de)
Date: Mon, 7 Nov 2011 03:31:55 +0100
From: Polytropon <freebsd@edvax.de>
To: "Michael Ross" <michael.ross@gmx.net>
Message-Id: <20111107033155.65ccd301.freebsd@edvax.de>
In-Reply-To: <op.v4jwfcrahalquq@michael-think>
References: <op.v4jwfcrahalquq@michael-think>
Organization: EDVAX
X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2)
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject: Re: Get list of ethernet devices
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Polytropon <freebsd@edvax.de>
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 07 Nov 2011 02:32:03 -0000

On Mon, 07 Nov 2011 01:46:14 +0100, Michael Ross wrote:
> Moin,
> 
> I'm setting up a system on an external USB drive,
> serving as fallback in case of a server failure:
> 
> Customer takes USB drive, plugs it into any of his PCs and boots of it.
> 
> Now I am looking for a good method to configure the network:
> 
> I could just start dhclient on any NIC which could possibly be there,
> thus cramming rc.conf with
> 	ifconfig_em0="DHCP"
> 	ifconfig_em1="DHCP"
> 	ifconfig_fxp0="DHCP"
> and so on.
> 
> Or I could grep ifconfig or dmesg output for ethernet interfaces and  
> dhclient these.
> 
> Both sound like a very messy solution.
> 
> So I would step beyond my current area of expertise, grep some source from  
> sysinstall, bsdinstall or somewhere and do it in C.
> But I'm kind of hoping anybody can point me to a readymade solution yet  
> unknown to me.

You could look at how FreeSBIE does it - it contains
"autodetect magic" also for graphics and sound.


-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...