Re: [PATCH v2 0/6] virtio-console: notify about the terminal size

[Szymon Lukasz]

On Wed, Jun 24, 2020 at 12:56:15PM +0100, Daniel P. Berrangé wrote:
> On Wed, Jun 24, 2020 at 01:26:34PM +0200, Szymon Lukasz wrote:
> > In this series resize notifications are only supported for the stdio
> > backend but I think it should be easy to add support for the vc backend.
> > Support for tty/serial backends is complicated by the fact that there is
> > no clean way to detect resizes of the underlying terminal.
> 
> In a libvirt managed scenario it is typical to have the virtio console
> connected to a UNIX socket. It would be desirable to have a way to
> deal with resizes there.
> 
> QEMU socket chardev (TCP & UNIX socket) supports a "telnet" protocol
> addition. Currently it doesn't almost nothing useful, but in theory
> we could wire up support for the telnet resize message:
> 
>    https://tools.ietf.org/html/rfc1073
> 
> 
> Another option is to allow dealing with resizes out of band, via the
> QMP monitor. ie we can introduce a qmp_chardev_winsize command that
> a client app can use to trigger the resize message to the guest OS.
> From libvirt's POV, this would be quite easy to support & useful to
> have.

I will look into that.
> 
> 
> Regards,
> Daniel
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