adding permisssions to cdrom so it can be mounted by a user

paul62 · 11-08-2004, 10:56 AM

How can I change the permissions of a cdrom so that a regular user not root can mount a cdrom I would appreciate the help?

http://www.blingo.com/images/friendb...120x52.blu.gif

k_bob · 11-08-2004, 11:05 AM

try using

chown <user name> -Rf /mnt/cdrom
chmod a+x /mnt/cdrom

or try editing your fstab

mine looks like this:
/dev/cdrom /mnt/cdrom iso9660 noauto,user,uid=1000,gid=100,owner
,ro 0 0

fstab is located in /etc so try vi /etc/fstab

Lenard Spencer · 11-08-2004, 02:03 PM

I was having that problem after I upgraded to the vanilla 2.6.9 kernel, but finally with some help of some our other users here, got it straightened out. Here are my fstab entries:

/dev/hdb /mnt/cdrom auto noauto,user,ro 0 0
/dev/hdd /mnt/cdrom2 auto noauto,user,ro 0 0

This way, they don't try to mount at bootup, and they can be mounted by normal users as well as root. The only caveat is only the user who mounted the volume (or root!) can unmount it, but that's the way it should be.

Hope this helps.

ror · 11-08-2004, 02:07 PM

If you want anyone to unmount after someone else mounted you can put users instead of user in the fstab.

Lenard Spencer · 11-08-2004, 03:19 PM

Quote:

Originally posted by ror
If you want anyone to unmount after someone else mounted you can put users instead of user in the fstab.

Thanks! I hadn't thought about that one.

lewkh · 11-08-2004, 07:46 PM

Quote:

Originally posted by Lenard Spencer
I was having that problem after I upgraded to the vanilla 2.6.9 kernel, but finally with some help of some our other users here, got it straightened out. Here are my fstab entries:

/dev/hdb /mnt/cdrom auto noauto,user,ro 0 0
/dev/hdd /mnt/cdrom2 auto noauto,user,ro 0 0

This way, they don't try to mount at bootup, and they can be mounted by normal users as well as root. The only caveat is only the user who mounted the volume (or root!) can unmount it, but that's the way it should be.

Hope this helps.

I have followed the fstab entries given by you, but I type mount as normal user, it prompts me:- "mount: only root can do that" error message. How can I solve this to let regular user to mount ,umount and eject cd ? And do I let it auto run whenever my cd insertion?

Lenard Spencer · 11-08-2004, 11:10 PM

Quote:

Originally posted by lewkh
I have followed the fstab entries given by you, but I type mount as normal user, it prompts me:- "mount: only root can do that" error message. How can I solve this to let regular user to mount ,umount and eject cd ? And do I let it auto run whenever my cd insertion?

Did you reboot after the changes?

eelriver · 11-08-2004, 11:45 PM

Reboot? Slackware only needs to reboot after a kernel change
or something really bad happening.
By the way, fstab is picky. There needs to be a "new line" character at the end of the file. Press enter at the end of the last entry, then save.
And instead of "auto" I use iso9660 as the file system.

lewkh · 11-09-2004, 02:22 AM

It does not work and show the same error message as before. by the way I m using debian linux, does it affect?
Why regular user seems like lacking of privileges to perform mount, umount and eject. error message shows as below:
command: mount /dev/hdc /cdrom
error: mount: only root can do thateject
command: eject
error: eject: unable to open `/dev/hdc'

eelriver · 11-09-2004, 02:40 AM

Well, maybe post in the Debian Forum?

Do you have a /mnt/cdrom directory? Or a /cdrom directory? You need to make one or the other. Then write your fstab to read
/dev/hdc /mnt/cdrom iso9660 noauto users 0 0
Also, make sure /dev/hdc is the correct drive.

ror · 11-09-2004, 02:54 AM

Quote:

Originally posted by eelriver
Well, maybe post in the Debian Forum?

Was gonna say that, but this person wasn't the thread starter.

And this isn't distro specific so no worries.

eelriver · 11-09-2004, 04:12 AM

Quote:

Originally posted by ror
Was gonna say that, but this person wasn't the thread starter.

And this isn't distro specific so no worries.

That's why I tried to help.

zba78 · 11-09-2004, 04:16 AM

Quote:

Originally posted by Lenard Spencer
Did you reboot after the changes?

Once any changes are made to fstab just do

Code:

mount -a

and that will remount everything as described in fstab.

oh BTW hello to the community

OrphanedLand · 11-09-2004, 06:10 AM

Hello friend

You can change permission of /dev/hdc and set it to 666. It must be solution for you. Also you can try to add users to 'cdrom' group. So they can mount cdrom device. This is another solution.

I hope that it will help to you...

Lenard Spencer · 11-09-2004, 04:46 PM

Quote:

Originally posted by zba78
Once any changes are made to fstab just do

Code:

mount -a

and that will remount everything as described in fstab.

oh BTW hello to the community

Sorry, I was thinking of something else...