Re: initial udev foray...successes and failures...

[Greg KH <greg@kroah.com>]

On Mon, Dec 22, 2003 at 02:41:44PM -0800, Tupshin Harper wrote:
> Greg KH wrote:
> 
> >On Thu, Dec 18, 2003 at 01:13:27AM -0800, Tupshin Harper wrote:
> > 
> >
> >>What didn't:
> >>1) anything that needed /dev/null
> >>2) anything that needed /dev/random (and probably urandom...didn't check)
> >>   
> >>
> >
> >You need the misc sysfs patch that I posted to lkml and
> >linux-hotplug-devel a while ago.  That will create those nodes for you.
> > 
> >
> Can't seem to find it in the archives of either list ...maybe I'm just 
> blind...can you point me at it?

ok, will post them over again to lkml and linux-hotplug-devel in a
minute.

> >>3) anything other that single user mode, since /dev/tty[0-9] were not 
> >>present ..just /dev/tty
> >>   
> >>
> >
> >That's odd.  Do you have any tty devices in /sys/class/tty/ ?  That's
> >what udev goes off of.
> > 
> >
> Yup...lots o stuf in /sys/class/tty: tty0-tty63 directories all 
> containing a "dev" file. tty0 (for example) contains dev with contents 4:0

Hm, so if you run the 'test.all' script in the test directory with the
'add' paramater, does it create the tty nodes?  Check to see if debian
has a initscript that properly catches all of the dev nodes in sysfs
(look at the one in the udev release, or the test.all script for an
example of how to do this properly without having to know what kinds of
devices are in sysfs.)

> >>What was odd:
> >>I have a number of ide hard drives in this machine(9). The first two 
> >>(hda, and hdb) and their partitions showed up as symlinks to 
> >>/dev/ide/host0/etc... The rest of them were not symlinks and were placed 
> >>directly in /dev (e.g. /dev/hde and /dev/hde3).
> >>
> >>   
> >>
> >>2) Why are some drives symlinked and others not?
> >>   
> >>
> >
> >I don't know.  What kind of udev.rules file did you use for this?  I
> >think the debian package is trying to emulate devfs names, which I don't
> >necessarily think is the best idea, as they are not LSB compliant.
> > 
> >
> Ahhh...udev.rules only contains ide entries for hda-hdd. hda is:
> NUMBER, BUS="ide", ID="0.0", NAME="ide/host0/bus0/target0/lun0/%D", 
> SYMLINK="hda%n"
> 
> Should there be one line for every conceivable IDE device?

If you want to name them something different from the kernel name, yes.
If not, the default kernel name will be used, which should work just
like without devfs or udev.

Hope this helps,

greg k-h


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