Re: FW: [Xen-devel] qemu-dm exit(1) for invalid option '-vncviewer' -- Xen #18023

[John Levon <levon@xxxxxxxxxxxxxxxxx>]

On Fri, Jul 11, 2008 at 11:46:42AM +0100, Daniel P. Berrange wrote:

> > This option works (worked) by passing the caller's display and
> > xauthority through xm and xend to qemu.  qemu then connects to it
> > later.  This is a very remarkable way of going about things.  Its
> > security properties are problematic from several points of view.
> > 
> > I had assumed that because it was so strange no-one would be using it,
> > so I deliberately dropped that change.  Evidently I was wrong.  If
> > this is a feature that is seriously used then I could reinstate it but
> > I think it should come with a health warning.

What might be useful is allowing "wait" mode for VNC like you can with
telnet serial console. I'm suspecting that's the only reason you would
ever want -vncviewer (to catch the BIOS screen).

> I think it should be killed - its easy todo it in the 'xm' client code,
> after all xm already knows how to spawn 'xm console' for text mode 
> display - this is just same use case in graphical mode.

Heck, then can we kill SDL, which does exactly the same thing, but in
xend?

I must admit when I discovered this, I blanched.

john

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