Re: Opinions on removing /proc/tty?

[Randy.Dunlap]

On Sun, 9 Jul 2006 09:45:06 -0400 Jon Smirl wrote:

> On 7/9/06, Antonino A. Daplas <adaplas@xxxxxxxxx> wrote:
> > Jon Smirl wrote:
> > > On 7/9/06, Randy.Dunlap <rdunlap@xxxxxxxxxxxx> wrote:
> > >> On Sat, 8 Jul 2006 01:56:02 -0400 Jon Smirl wrote:
> > >>
> > >> > On 7/8/06, Randy.Dunlap <rdunlap@xxxxxxxxxxxx> wrote:
> > >> > > I don't know how well this is an answer to your question,
> > >> > > but I would like to be able to find a list of registered "consoles,"
> > >> > > whether they be serial, usbserial, netconsole, lp, or whatever.
> > >> > > /proc/tty/drivers does that partially.
> > >> >
> > >> > Console is an overloaded word. Do you want to know where it is legal
> > >> > to send system log output to, or do you want to know where you can log
> > >> > in from? There was a thread earlier that talked a little about
> > >> > controlling this.
> > >>
> > >> I have a working definition:
> > >> I want to see a list of drivers that have called register_console().
> > >>
> > >> > > I have a patch that also does it in /proc/consoles:
> > >> > >   http://www.xenotime.net/linux/patches/consoles-list.patch
> > >> > > Is somewhere in /sys the right place to find a list of all consoles?
> > >> >
> > >> > /sys is the right place for this info but a class does not exist for
> > >> it yet.
> > >>
> > >> I want a list of registered consoles.  How would I express that in /sys ?
> > >
> > > You could make the list appear as an attribute in
> > > /sys/class/tty/console. You will need to all a little sysfs code after
> > > the console tty device is created.
> > >
> >
> > That would violate the one file, one value rule and GregKH will drop
> > it like a hot potato.
> >
> > A better solution is to have /sys/class/console.
> 
> The one value rule is for things that can be changed. For, example, I
> see no problem with using the graphics/modes attribute to see a list
> of legal modes, and then using graphics/mode to set or view the
> currently active mode. Why can't we have a read-only attribute that
> displays the list of available consoles?

We should be able to do that somewhere/somehow, but /sys does
not allow for it in one file, like Tony said.

---
~Randy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/