USB problem: /dev/ugen* dynamically auto-reconfigures to
root:operator 644, so non-root user unable to access USB devices
even if wanted
Bernd Walter
ticso at cicely12.cicely.de
Mon Oct 20 09:06:10 PDT 2003
On Mon, Oct 20, 2003 at 01:44:50PM +0200, Poul-Henning Kamp wrote:
> In message <20031020113514.GA875 at titan.klemm.apsfilter.org>, Andreas Klemm writ
> es:
> >root at titan[ttyp2]{6} ~ ls -l /dev/ugen*
> >crw-r--r-- 1 root operator 114, 0 Oct 20 13:14 /dev/ugen0
> >crw-r--r-- 1 root operator 114, 2 Oct 20 13:14 /dev/ugen0.2
> >crw-rw-rw- 1 root operator 114, 16 Oct 20 13:14 /dev/ugen1
> >crw-r--r-- 1 root operator 114, 17 Oct 20 13:14 /dev/ugen1.1
> >crw-r--r-- 1 root operator 114, 18 Oct 20 13:14 /dev/ugen1.2
> >crw-r--r-- 1 root operator 114, 19 Oct 20 13:14 /dev/ugen1.3
> >
> >And voila, ther permission are wrong again.
>
> I have no idea what goes on here.
An USB device can be switched between several alternative
configurations.
If such a change is requested (USB_SET_CONFIG) the devicenode for
everything but the control channel is recreated.
--
B.Walter BWCT http://www.bwct.de
ticso at bwct.de info at bwct.de
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