mounting a hard disk image as user?

zero79 · 05-04-2005, 02:30 PM

Hi,

I am unable to mount a hard disk image via the loop device as user; however, I am able to mount the image as root. It would make my life significantly simpler to be able to mount and unmount this image as a standard user.

i can mount the image as root with:

Code:

$ lsmod | grep loop
loop                   16424  0
$mkdir /home/account/mnt
$ su -c "mount -o loop=/dev/loop0 /home/account/test.img /home/account/mnt"
$ su -c "ls /home/account/mnt"
test1 test2
$ su -c "umount /home/account/mnt"

now if i attempt to perform the same operations as user, i get errors:

Code:

$ mount -o loop=/dev/loop0 /home/account/test.img /home/account/mnt
/dev/loop1: Permission denied

i figured there may be an issue with permissions:

Code:

$ ls -l /dev/loop0
brw-rw----  1 root disk 7, 1 2005-05-03 11:24 /dev/loop0
$ chmod 666 /dev/loop0
$ ls -l /dev/loop0
brw-rw-rw-  1 root disk 7, 1 2005-05-03 11:24 /dev/loop0

now, i have a new error, but i don't know exactly what this means:

Code:

$ mount -o loop=/dev/loop0 /home/account/test.img /home/account/mnt
memlock: Operation not permitted
Couldn't lock into memory, exiting.

thanks for any thoughts or assistance...this is really bugging me.

makuyl · 05-04-2005, 03:01 PM

You need to modify /etc/fstab so users can mount it. There's an example here: http://www.linuxsecurity.com/docs/HO...n-HOWTO-4.html

jschiwal · 05-05-2005, 07:12 PM

I think that I would make an entry in the fstab and use the options:
noauto,uid=account,gid=account

or you could use the options
noauto, user

When mounting it as a user, use the mount location and not the device location:
mount /home/account/mnt

Also, this is assuming that your user name is 'account' or that you have read and execute permissions for the /home/account directory.