Messages in this thread | | | From | Olaf Dietsche <> | Subject | Re: About /etc/mtab and /proc/mounts | Date | Wed, 26 Feb 2003 14:39:31 +0100 |
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mru@users.sourceforge.net (Måns Rullgård) writes:
> Olaf Dietsche <olaf.dietsche@t-online.de> writes: > >> The 'user' option is in /etc/fstab, so this is not a problem. I can >> mount _and_ umount /cdrom as a simple user. > > It's strange if you can. My mount (fairly recent) looks in fstab to > determine whether a user should be allowed to mount a device. > However, when unmounting it checks /etc/mtab to make sure it was you > who mounted it in the first place, making it impossible to unmount > someone else's cdrom. If you use the 'users' (note the 's') option > instead any user can mount or unmount the device at any time, mtab > being ignored.
I just verified it. I and anybody else can mount and umount /cdrom. If I mounted /cdrom, someone else can umount it.
$ mount -V mount: mount-2.11n
$ grep user /etc/fstab /dev/hdb/0 /cdrom iso9660 defaults,ro,unhide,user,noauto,noexec,nosuid 0 2
$ ls -l /etc/mtab lrwxrwxrwx 1 root root 12 2002-09-22 02:58 /etc/mtab -> /proc/mounts
When /etc/mtab is a regular file, it works as you described.
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