linux-kernel - Re: [PATCH] /dev/time for Linux, inspired by Plan 9

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Date:	Fri, 6 Mar 2009 21:54:04 -0800
From:	Greg KH <greg@...ah.com>
To:	"J.R. Mauro" <jrm8005@...il.com>
Cc:	Christopher Brannon <cmbrannon@....net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] /dev/time for Linux, inspired by Plan 9

On Sat, Mar 07, 2009 at 12:43:43AM -0500, J.R. Mauro wrote:
> On Fri, Mar 6, 2009 at 12:57 PM, Greg KH <greg@...ah.com> wrote:
> > On Tue, Mar 03, 2009 at 09:06:46PM -0600, Christopher Brannon wrote:
> >> Under Plan 9 from Bell Labs, one queries or sets the system clock by
> >> reading or writing text strings to a special file named /dev/time.
> >> I implemented such a facility for Linux.  A read of /dev/time produces
> >> four decimal numbers: epoch seconds, nanoseconds since start of epoch,
> >> jiffies since boot, and jiffies per second.  Writing a decimal number to
> >> /dev/time sets the system clock to the given number of epoch seconds.
> >> Anyone who is permitted to write to /dev/time may set the clock.
> >> Granting this privilege becomes as easy as modifying groups and file
> >> permissions.
> >>
> >> Signed-off-by: Christopher Brannon <cmbrannon@....net>
> >
> > I'm starting to see a few plan9 specific devices being proposed
> > recently, with one making it into the staging tree recently (the p9auth
> > interface).  Should we just start lumping them all together so to keep
> > them in one place?  drivers/plan9/ ?
> 
> That might be a good idea, assuming it doesn't start up a flamewar.

I don't think if we keep it all in one place, it would.

> The Glendix folks are working hard to get a lot of these device files
> and filesystems implemented and it would be nice to see them have a
> place to feel welcome.
> 
> Would it be very involved to get a little sandbox for these things?

drivers/plan9 looks like a nice place to me, any objections?

thanks,

greg k-h
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