Re: [ANNOUNCE] udev 021 release

[Greg KH <greg@kroah.com>]

On Fri, Mar 05, 2004 at 08:22:52AM +0100, Dominik Kubla wrote:
> >Permissions are based on the name of the device.
> >
> 
> Oh, i realized that. But my point is: shouldn't they be based on the 
> CLASS of the device rather than the name? After all the names are 
> changeable, but the class is not...
> 
> I checked the hotplug-devel archives and saw that somebody has already
> posted a patch doing that. So i guess the question boils down to:
> Will you accept it or not?

Ok, I'm convinced now.  I just took a patch that does this.

> >>Is there a way to distinguish between CD-ROM, DVD-ROM and writers? It is
> >>not unusual  these days to  have at least a  DVD-ROM and CD-Writer  in a
> >>desktop system. If you look at the  latest offers from Dell you will see
> >>that they tend to include a DVD-ROM  and a DVD+RW drive in at least some
> >>configurations. So  it would  be nice  if udev would  be able  to create
> >>links like "cdwriter", "dvd" and "dvdwriter" out of the box. (And assign
> >>the appropriate group to the device nodes...)
> >
> >
> >You can do that, just name them differently based on the type of device.
> >Also, try providing a symlink to "cdrom" to not break what users are
> >expecting.
> 
> Would you care to explain how to do it?

Is there some way that you can see in sysfs or in /proc that you can use
to detect these devices differently?

thanks,

greg k-h