Re: [PATCH, RFC, BAD IDEA] /proc/tty/console

[Andrew Morton <akpm@linux-foundation.org>]

On Fri, 29 Feb 2008 10:07:30 -0500
Bill Nottingham <notting@redhat.com> wrote:

> Andrew Morton (akpm@linux-foundation.org) said: 
> > > The attached patch adds /proc/tty/console. The contents of it are
> > > simply a description of the current drivers attached to /dev/console.
> > > For example, a boot with 'console=ttyS3,115200n1 console=tty0' would
> > > yield:
> > > 
> > > # cat /proc/tty/console
> > > unknown             /dev/tty0
> > > serial              /dev/ttyS3
> > 
> > I must say that the what-consoles-are-registered problem makes my head spin
> > sometimes too.  Seems a worthy objective.
> > 
> > However I think that a bunch of plain old printks which are emitted when a
> > console is added or removed would suffice?
> 
> We already do that in register_console(), albeit without flags.

oh.

> My concern is I'd like to easily programmatically do something with this
> info - ideally it would be in sysfs so it can easily be used from udev
> or something similar.

That's the sort of information which really must be in the changelog, fully
spelled out.