On Thu, 4 Oct 2001, Matthew Garman wrote:
>
> The permissions on /dev/dri look like the following by default:
>
> # ls -la /dev/dri
> total 23
> drwxrwx--- 2 root root 1024 Aug 10 19:08 ./
> drwxr-xr-x 6 root root 21504 Oct 4 16:12 ../
> crw-rw---- 1 root root 226, 0 Aug 10 19:08 card0
>
> What is the "correct" way to allow ordinary (i.e. non-root) users to
> access this device?
>
> I have been setting the directory permission on /dev/dri to 777 and
> /dev/dri/card0 to 666. But this probably isn't the correct approach, and
> these permissions seem to reset back to default.
>
> Should I make a "3d" group or something like that? If I do, will the
> device ownership always fall back to root.root?
X always runs with superuser privs, so it can open a device owned by
root/root. There is a special configuration directive in XF86Config that
tells X about the DRI devices:
Section "DRI"
Mode 0666
EndSection
Check out the documentation here:
http://www.xfree86.org/current/DRI6.html#10
-jwb
