On Thu, Aug 10, 2000 at 01:35:36PM -0400, rpjday wrote:
> On Thu, 10 Aug 2000, Steve Borho wrote:
> > mount/unmounting drives requires root access (since you're modifying
> > important filesystem tables).
> >
> > Since /bin/mount is setuid root, it can allow normal users to mount
> > some drives if it is configured to.
>
> this still doesn't answer the question. the option "user" makes
> the filesystem mountable by regular users. so how is the option
> "owner" different?
from the mount man page:
Thus, given a line
/dev/cdrom /cd iso9660 ro,user,noauto,unhide
any user can mount the iso9660 file system found on his
CDROM using the command
mount /dev/cdrom
or
mount /cd
For more details, see fstab(5). Only the user that
mounted a filesystem can unmount it again. If any user
should be able to unmount, then use users instead of user
in the fstab line. The owner option is similar to the
user option, with the restriction that the user must be
the owner of the special file. This may be useful e.g. for
/dev/fd if a login script makes the console user owner of
this device.
Red Hat's login (PAM) scripts change the ownership of the console,
cdrom, floppy, and other devices to your userid when you log into the
console. Then in /etc/fstab they add the 'owner' tag to those mount
points. Now anyone who logs into the console can mount those devices
without being root.
The only problem with this scheme is that multiple people can log into
the console... ie: multiple VT's plus X, and only the last one to log
in has ownership rights.
--
Steve Borho Voice: 314-429-8300 ext:3042
Member of Technical Staff
Celox Networking Inc
Fortune of the day:
Death is nature's way of telling you to slow down.
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