Re: Struggling with Audio CD access rights in SuSE 8.2 (SOLVED)

On Tuesday 15 July 2003 21:18, Jan Elders wrote:
> On Monday 14 July 2003 12:13, [email protected] wrote:
> > I always forget the default reply is to the original sender only, sorry
> > for the double Jan   ^^;
> >
> > > What puzzles me even more is that I have to give both
> > > commands everytime again after having booted. Shouldn't
> > > the chmod remain effective, also after boot ?
> >
> > That's right, assuming nothing changes them.
> >
> > In a standard 8.2 installation if you look in /etc/pam.d files for xmd
> > and gdm, you'll see they call a pam module called devperm.
> > This module reads a /etc/logindevperm file, that states wich device
> > should have their permissions changed and to what. Moreover, they change
> > the owner of some devices to the logged in user.
> > This is what's changing the devices permissions. What I dom't understand
> > is why this isn't right for you: after all it should give you ownerships
> > of the listed device, so your user should be able to use them. I have
> > problem with this only when/if I log in with a different user in a
> > different X session, but otherwise I'm fine.
> >
> > Oh, since I'me re-sendding this, I can as well add a maybe obvious tip:
> > if you want to give permission for the devices to some groups, you can
> > change the ownership of i.e.  /dev/video0 to root:video this way the
> > logging-in user is assigned ownership of the device, but the other users
> > in the video group can still use the device. Then you go editing
> > /etc/logindevperm to change the rights for the video devices from 0600 to
> > 0660  :-)
> >
> >
> > Ciao,
> >    Roberto.
>
> Whoa, that's exactly what I am doing : logging in as 'root' and after that
> logging in as 'user' in a different X session !
> Are your tips still valid then ?
> This requires some studying for me, since I'm relatively new in the Linux
> environment.
> In the meantime I have - temporarily - circumvented the problem by writing
> a small script containing both commands :
>    chmod a+r /dev/cdrom
>    chmod a=+rw /dev/mixer
> Now I run this script as 'root' first thing after booting and then all is
> fine (of course).
>
> Would there be any other approach in this multi X-session situation ?
> Greetings,
> --
> Jan Elders

YES ! I just found the answer myself (by accident).
The problem is indeed caused by running multiple X-sessions.
If you want to run multisessions then :
FIRST start your user session(s) -> no problem with accessing the Audio CD,
THEN start your root session.
No script is necessary !
Until now I did it in the reverse order (first 'root' then 'user') and then 
the 'user' will have no access permission to the CDROM.

Ciao,
-- 
Jan Elders
Nuenen
the Netherlands