Re: [GnomeMeeting-list] Runs as root but not as user

[Anne Wilson <cannewilson tiscali co uk>]

On Thursday 11 Sep 2003 11:48 am, Stefan Bruens wrote:
> Am Donnerstag, 11. September 2003 11:35 schrieb Anne Wilson:
> > On Wednesday 10 Sep 2003 9:58 pm, Stefan Bruens wrote:
> > > Am Mittwoch, 10. September 2003 22:03 schrieb Anne Wilson:
> > > > On Wednesday 10 Sep 2003 8:07 pm, PUYDT Julien wrote:
> > > > > Then no wonder the error message is the same: change the
> > > > > perms to a more sensible 660, and the owner to root:video,
> > > > > and that should work.
> > > >
> > > > OK - now it's
> > > > [root anne-linux anne]# ls -l /dev/v4l/
> > > > total 0
> > > > crw-rw----    1 root     video     81,   0 Jan  1  1970
> > > > video0
> > > >
> > > >
> > > > If I launch as root I have a picture.  If I launch as anne I
> > > > still get the same message
> > > >
> > > > Later...
> > > >
> > > > I've just discovered that I can change owner, group and
> > > > perms, and they list ok, but if I log out and back in they
> > > > have reverted.  I must be missing something vital here, and
> > > > perhaps that's what's causing the problems.
> > >
> > > This is done in accordance to /etc/logindevperm.
> > >
> > > As you said, the directory /dev/v4l belongs to root.video,
> > > check that the _directory_ /dev/v4l is accessible by users
> > > belonging to group video, so this should be 750 for the
> > > directory and 660 for the device.
> > >
> > > Make shure to change /etc/logindevperm accordingly.
> > >
> > > Stefan
> >
> > Stefan, /etc/logindevperm doesn't exist in a Mandrake setup, so I
> > had to guess. I set the permissions I wanted in
> > /etc/security/msec/perm.local, which overrides the more general
> > permission settings in msec, then rebooted.  The directory
> > /dev/v4l is now root.video 750, but I cannot change the
> > /dev/v4l/video* owner which still shows as anne, although the
> > group as changed to video, and permissions are 750. No matter
> > what I do, it reverts to owner anne, permissions 750. I don't
> > understand why it is not being read from
> > /etc/security/msec/perm.local.  The current lines in that file
> > are:
> > /dev/v4l/	root.video	750
> > /dev/v4l/video0  root.video	660
> >
> > I am trying to achieve what you have all said are optimal
> > settings, but shouldn't the settings that I have now allow me
> > access anyway?  I am still getting the same error message.
> >
> > Anne
>
> What is the result of "ls -la /proc/video/dev/"? This has to be
> readable to find the devices, too.
>
dr-xr-xr-x    2 root     root            0 Sep 11 12:31 ./
dr-xr-xr-x    3 root     root            0 Sep 11 12:31 ../
-rw-r--r--    1 root     root            0 Sep 11 12:31 video0

It doesn't look right.  Bearing in mind what I wrote above, can you 
guess what's happening?

> If the settings seem to be correct, try starting gm with
> "strace -eopen -o gm.out gnomemeeting"
> Start it, wait till the error messages has appeared, and quit gm.
> Then open gm.out with less (or any other pager or editor) and
> search for "video". This should you give some hints what gm is
> trying to do.

As user:

strace: can't fopen 'gm.out': Permission denied

Anne
-- 
Registered Linux User No.293302
Have you visited http://twiki.mdklinuxfaq.org yet?