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Date: Thu, 21 Aug 2008 12:31:05 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] vnc port selection
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To: qemu-devel@nongnu.org
Cc: Xen Development Mailing List <xen-devel@lists.xensource.com>

Gerd Hoffmann wrote:
>   Hi folks,
>
> Xen's qemu-dm version has a '-vncunused' command line switch which asks
> the internal vnc server to pick any unused tcp port to listen on.  The
> actual port is communicated to the outside world via xenstore.
>
> I'm looking for a reasonable way to implement that functionality in
> upstream qemu.  First, I think it shouldn't be a separate command line
> switch but an option for the existion -vnc switch.

Maybe something like a to=N option.  So you would have:

-vnc localhost:0,to=10

That would try from displays 0 to 10 and select the first one it could 
attach to.

>   Second, we need a
> way to communicate the port picked which isn't xen-specific.  Obvious
> choice is a monitor info subcommand.
>   

There's already an info vnc.  It can be added to that.

Regards,

Anthony Liguori

> Comments?  Other suggestions?
>
> cheers,
>   Gerd
>
>