[Qemu-devel] Re: virtio-serial: An interface for host-guest communication

[Anthony Liguori]

Amit Shah wrote:
> Hello all,
>
> This are the latest version of the patches.
>
> Lots of things have changed since the last submission. A few of
> which I remember:
> - VNC copy / paste works* (* conditions apply)
>   - client vnc copies get propagated to guest port 3 (/dev/vmch3)
>   - guest writes to port 3 (/dev/vmch3) go straight to client's clipboard
>   

Why 3?

Where's the guest application that drives the copy/paste?

I expect the first problem you'll run into is that copy/paste daemon has 
to run as an unprivileged user but /dev/vmch3 is going to be owned by 
root.  You could set udev rules for /dev/vmch3 but that's pretty 
terrible IMHO.

I think you'll find that you need a root daemon that talks to vmchannel 
and then allows unprivileged connections over a unix socket device.  In 
that case, why even bother having multiple channels since your daemon 
can multiplex..

Regards,

Anthony Liguori