[systemd-devel] getty : how to run getty on every ttyX
Daniel P. Berrange
berrange at redhat.com
Fri Dec 13 08:28:01 PST 2013
On Fri, Dec 13, 2013 at 05:20:19PM +0100, Lennart Poettering wrote:
> On Fri, 13.12.13 16:15, Lennart Poettering (lennart at poettering.net) wrote:
>
> > > We had discussed this back at Linux Plumbers last year, and at the time
> > > you had suggested that rather than create /dev/ttyN symlinks we should
> > > instead do something like /dev/containerttyN instead, and set a
> > > 'container_tty' variable containing a list of all those device names
> > > so that systemd can discover them sensibly. We never got around to
> > > doing this from the libvirt side, and AFAIK systemd hasn't done anything
> > > on its side either. So is this still a suitable way forward ?
> >
> > Yeah, I am pretty sure that's what we should do. I figure I should hack
> > that up. I'll work on it now.
>
> Committed. "systemd-getty-generator" will now look for $container_ttys
> set as an environment variable for PID 1. If that is set it will split
> the string up on whitespaces and start a getty on all ptys
> referenced. Note that this only supports ptys, not any other ttys.
>
> Example:
>
> "container_ttys=pts/5 pts/8 pts/15"
>
> when pass to PID 1 will spawn three additional gettys on ptys 5, 8 and
> 15.
>
> Note that this *really* only supports ptys, not any other kinds of ttys,
> sinc for those we require propery device enumeration and notification
> and we don't have those in containers... I still chose to name this
> $container_ttys rather than $container_ptys, so that maybe one day we
> can extend it should devices like this ever get virtualized.
>
> This will be in systemd 209.
Great, that all sounds good to me.
Daniel
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