Re: Strange udev problem - (Found the problem and a temporary fix)

[Greg KH <greg@kroah.com>]

On Mon, Jun 21, 2004 at 01:43:49PM -0700, Jim Gifford wrote:
> If found the cause of a problem, and a temporary fix.
> 
> Cause:
> http://linuxusb.bkbits.net:8080/udev/cset@1.759?nav=index.html|tags|ChangeSet@..1.760

What?  How?

> Fix:
> Submitted By: Jim Gifford (jim at linuxfromscratch dot org)
> Date: 2004-06-21
> Initial Package Version: 027
> Origin: Jim Gifford
> Upstream Status: N/A
> Description: Reverts tweak node unlink handling

You're just reverting the code, that's not ok.

I still don't see how udev is at fault here, as you see no log messages
from it.

Didn't you also do a "echo /bin/true > /proc/sys/kernel/hotplug" to
disable udev and the hotplug events entirely and still had the problem?
That rules out udev.

thanks,

> http://linuxusb.bkbits.net:8080/udev/cset@1.759?nav=index.html|tags|ChangeSet@..1.7601
> Symptons of problem: When cron executes a bash script, /dev/null changes
> from the permissions lists in udev.rules to 600. This patch seems to
> correct the issue, I am submitting it as a temporary fix util a better
> fix can be found.

Do you have a small example script that shows this happening?  I thought
the other script you posted just watched what happened in /dev, right?

thanks,

greg k-h


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