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To: Olaf Dietsche <olaf.dietsche@t-online.de>
Cc: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=),
       miquels@cistron-office.nl (Miquel van Smoorenburg),
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Subject: Re: About /etc/mtab and /proc/mounts
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From: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=)
Date: 26 Feb 2003 14:54:23 +0100
In-Reply-To: Olaf Dietsche's message of "Wed, 26 Feb 2003 14:39:31 +0100"
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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.

What does your /proc/mounts look like when the cdrom is mounted?  Are
you using a standard mount, or something hacked up by RH or others?

-- 
M?ns Rullg?rd
mru@users.sf.net
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