From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.33)
	id 1BxMhJ-0005n7-3B
	for qemu-devel@nongnu.org; Wed, 18 Aug 2004 05:25:33 -0400
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.33)
	id 1BxMhH-0005mv-MC
	for qemu-devel@nongnu.org; Wed, 18 Aug 2004 05:25:32 -0400
Received: from [199.232.76.173] (helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.33) id 1BxMhH-0005ms-GV
	for qemu-devel@nongnu.org; Wed, 18 Aug 2004 05:25:31 -0400
Received: from [80.91.224.249] (helo=main.gmane.org)
	by monty-python.gnu.org with esmtp (Exim 4.34) id 1BxMcq-0001Wg-RW
	for qemu-devel@nongnu.org; Wed, 18 Aug 2004 05:20:57 -0400
Received: from root by main.gmane.org with local (Exim 3.35 #1 (Debian))
	id 1BxMcp-00034i-00
	for <qemu-devel@nongnu.org>; Wed, 18 Aug 2004 11:20:55 +0200
Received: from dsa.physics.usu.ru ([194.226.236.126])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <qemu-devel@nongnu.org>; Wed, 18 Aug 2004 11:20:55 +0200
Received: from patrakov by dsa.physics.usu.ru with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <qemu-devel@nongnu.org>; Wed, 18 Aug 2004 11:20:55 +0200
From: "Alexander E. Patrakov" <patrakov@ums.usu.ru>
Date: Wed, 18 Aug 2004 15:15:44 +0600
Message-ID: <cfv6n2$6tb$3@sea.gmane.org>
References: <874qn24t78.fsf@trouble.defaultvalue.org>
	<41214B89.4030908@migasia.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
In-Reply-To: <41214B89.4030908@migasia.com>
Sender: news <news@sea.gmane.org>
Subject: [Qemu-devel] Re: Any interest in an option to use an existing
	tun/tap device?
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org

Jesus M. Salvo Jr. wrote:
> Rob Browning wrote:
> 
>> It would be nice if qemu could be configured to use an existing
>> tun/tap device rather than require root (or sudo) access.  Would
>> others be interested in such an addition, perhaps "qemu -tun tun0" or
>> similar.
>>
>> User Mode Linux allows something similar.  See the section "TUN/TAP
>> with a preconfigured tap device" at
>> http://user-mode-linux.sourceforge.net/networking.html.
>>
>> Thanks
>>
> 
> I thought it already does, via the -tun-fd option ... though I have not 
> seen an example of how to use this option / determine the file 
> descriptor of an existing tun/tap interface, so I dont know how to use 
> it as well. An example would be good.

(not tested, but might work in bash)

qemu -other-options -tun-fd 3 3<>/dev/net/tun

-- 
Alexander E. Patrakov