Received Sun 19 Dec 2004 5:37am +1100 from Sven Luther: > On Sat, Dec 18, 2004 at 05:35:06PM +0100, Sjoerd Simons wrote: > > On Sat, Dec 18, 2004 at 05:32:26PM +0100, Sven Luther wrote: > > > On Sat, Dec 18, 2004 at 03:56:42PM +0000, Sam J wrote: > > > > Marcelo E. Magallon wrote: > > > > >On Sat, Dec 18, 2004 at 07:03:22AM +1100, Graham Williams wrote: > > > > > > > > > > > At any time on one machine (home machines running Debian unstable) I > > > > > > allow multiple users to have their X sessions running concurrently > > > > > > (e.g., on tty7, tty8, etc). I've not yet figured out how to get > > > > > > gnome-volume-manager working happily in this situation.
> > > > > My initial reaction is "sorry, you loose". > > > > Could g-v-m be configured to use the "users" option instead of "user"? > > > > According to mount(8), it should allow any user to unmount the device > > > > regardless of who mounted it. > > > yes, but this alone will not do. you also need to make the files > > > available, so > > > a group and the right gid options would be best in this circunstance. > > Please first define the behaviour you would like to see, before going into > > implementation details.. Do you want everyone to be able to umount all > > removable devices under all circumstances ? Or just in some cases or... [...] > Still, i understand that this is a maybe non-solveable usability issue. Let's > go into this in detail, as you asked. > > 1) There is one physical machine, where stuff can be plugged into. > > 2) This machine usually has only one user holding the console, so this user > is used by pmount, and everything works fine. I guess the "first" running g-v-m that notices the new device gets to assign its owner to the mounted device? (Each user may be running g-v-m and I'm guessing one of them notices the new device first?) > 3) In the case at hand, there are two X server running on the same machine > and the same console. They are not active at the same time, and it would > stand to reason that the expected behaviour would be for the user whose > session is actually active to mount the stuff. I don't know if this is > easily available as info though, but once you know this, the rest becomes > easy. Yes, if we could determine which of multiple X servers running on the current console was the active one when the device is plugged in that would be a start toward the solution. Another option is to open the device up to everyone in group plugdev through fstab (as below) but that is less than ideal: /dev/usbkey /media/usbkey auto users,gid=plugdev,umask=0002,defaults 0 0 > Remaining problem is what to do about a plugged in USB stick, once you > switch over to the other console. One solution would be a console user > group, but again this poses security problems, altough rather limited ones. Would not the use of the "users" option in mount be a help to the solution here? The second user here just unmounts the device originally mounted by the first user's g-v-m, then mounts (e.g., unplug then plugs it back in) to get their g-v-m mounting it for them. Of course, the unmount won't work if the first user still has the device open somewhere, but I suppose that is a management issue left up to the users sharing the console! Thanks for the insights. Regards, Graham
