USB problem: /dev/ugen* dynamically auto-reconfigures to
root:operator 644, so non-root user unable to access USB devices
even if wanted
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Oct 20 04:44:56 PDT 2003
In message <20031020113514.GA875 at titan.klemm.apsfilter.org>, Andreas Klemm writ
es:
>1) /etc/devfs.conf with:
> perm ugen1 0666
> perm ugen1.1 0666
> perm ugen1.2 0666
> perm ugen1.3 0666
I would probably just use a wildcard:
perm ugen* 0666
>1st needs a command like
> devfs ruleset 100
This makes the rules only apply to devices arriving in the future,
you also need:
devfs rule applyset
to make them apply to currently available devices.
>3. step, try to access camera
> by klick on the Canon PowerShot G5 line in digikam
>
>"failed to initialize the camera"
>
>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.
>And BTW, shouldn't the devfs(8) manpage have a reference
>to devfs.conf ? I understand, that /etc/devfs.conf is only
>used by the /etc/rc.d/devfs startup script, to setup permissions
>via chmod commands and such .... so no real relationship to the
>devfs command.
Yes, probably a good idea.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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