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Date: Thu, 05 Jul 2007 10:44:01 -0500
From: Jason Wessel <jason.wessel@windriver.com>
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Subject: Re: [Qemu-devel] Problem with the -serial option of qemu
References: <C2BB89FD-F97D-4ADF-B938-264C20A3C8C2@gmail.com>
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To: The MoonSeeker <themoonseeker@gmail.com>
Cc: qemu-devel@nongnu.org

The MoonSeeker wrote:
> Hi everyone,
>
> I'm on gentoo 2.6.20-gentoo-r8 and I'm trying to send the serial port 
> of my linux guest to a tcp server. To do that, i use this command :
>
> qemu -hda linux.img -serial tcp::4000,server,nowait
>
> And I get this error :
>
> qemu: could not open serial device 'tcp::4000,server,nowait'
>
> I was using the same command on Ubuntu 6.06 and that was working. I 
> don't understand what's happen and how can I debug this?
>
> Thx for help!
Make sure you are running the same version of QEMU in both places.  
Generally speaking if it says it could not open the device, it is 
because something else is using the port.

% netstat -an |grep 4000
tcp        0      0 0.0.0.0:4000                
0.0.0.0:*                   LISTEN     

% lsof -nP |grep 4000
redirector  15998   jwessel    3u     IPv4    1661621              TCP 
*:4000 (LISTEN)

In this example I started up an application called redirector on the 
port.  I do not believe this issue is a qemu defect of any kind.

Cheers,
Jason.