Re: wireless device and udev

["John W. Linville" <linville@tuxdriver.com>]

On Wed, Dec 09, 2009 at 06:54:27AM +0300, Andrey Borzenkov wrote:
> On Tuesday 08 of December 2009 23:05:04 John W. Linville wrote:
> > On Tue, Dec 08, 2009 at 08:29:11PM +0100, Johannes Berg wrote:
> > > On Tue, 2009-12-08 at 13:52 -0500, John W. Linville wrote:
> > > > So, probably we need to map from the wlanX name to the phyY name,
> > > > then determine whether or not this is the first wlanX for phyY.
> > > > If not, then the name should be left alone.
> > > >
> > > > Now, how do we figure out how many wlanX's belong to phyY?
> > >
> > > And what's the "first" one? :)
> > 
> > I suppose I was figuring that if there was only one, it was the
> > first. :-)  But you're right, I suppose that could be racy...
> > 
> > > ls /sys/class/net/wlan0/device/net/
> > >
> > > will give you the list of interface associated with this device.
> > 
> > Cool...
> > 
> 
> Is it possible to distinguish between automatic system enumeration when 
> new device is created and explicit name that user gives? Because in 
> example above (iw phy add interface) user already supplied specific 
> name; there is no reason for udev to (try to) mangle it.

That's why I wanted the "first" one...it is auto-generated. :-)

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@tuxdriver.com			might be all we have.  Be ready.