[Qemu-devel] Re: Any interest in an option to use an existing tun/tap device?

[Alexander E. Patrakov]

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