CentOS - Oct 2007 - umount'ing a /media/disk... as a user

Hello!

Currently, whenever I attempt to umount /media/disk (or -1, etc), I 
either have to be user or have to have given the account sudo 
privileges.  Since these "disks" are usually just flash-memory sticks,
I'd really rather have the permission to umount them be given to users.  
The /etc/mtab shows the /media filesystems, /etc/fstab does not.

Thank you,
Charles Campbell

On 10/15/07, Charles E Campbell Jr <charles.e.campbell at nasa.gov>
wrote:
> Hello!
>
> Currently, whenever I attempt to umount /media/disk (or -1, etc), I
> either have to be user or have to have given the account sudo
> privileges.  Since these "disks" are usually just flash-memory
sticks,
> I'd really rather have the permission to umount them be given to users.
> The /etc/mtab shows the /media filesystems, /etc/fstab does not.
>
> Thank you,
> Charles Campbell
Charles,

During a quick google session I found this feedback:

whats wrong with using the "su" command?

And after laughing for a while I found alternatives, udev rules:

http://www.reactivated.net/writing_udev_rules.html

You could also use a automounter approach, kernel patch or suid on a
custom compiled mount command etc.


/ Nicolas

Charles E Campbell Jr pisze:
> Currently, whenever I attempt to umount /media/disk (or -1, etc), I 
> either have to be user or have to have given the account sudo 
> privileges.  Since these "disks" are usually just flash-memory
sticks,
> I'd really rather have the permission to umount them be given to users.
> The /etc/mtab shows the /media filesystems, /etc/fstab does not.
You may add those devices to fstab, much like partitions:

/dev/sda1 /mnt/pendrive vfat noauto,users,rw,umask=0000 0 0
/dev/sda2 /mnt/pendrive2 vfat noauto,users,rw,umask=0000 0 0

the key is that "users" param, to allow normal users mount and umount 
filesystem; I very often use static mount points and edit fstab instead 
of using HAL for this, but HAL itself respects fstab configuration too

all parameters are listed in mount docs, but since those are removable 
media, security isn't very important