a virtual CD/DVD program?

[yellowchicken]

Is there any vitural CD/DVD program that we can mount cd image (.iso ...) and use like a CD/DVD drive?

Like this program for windows:

http://www.daemon-tools.cc/dtcc/portal/portal.php

 

Thanks

[feralertx]

No extra program needed to do that !

 

All you need to do is mount your iso image in a directory of your choice, yeah, its that simple !

 

For example, we are mounting the file Mandrake_DVD.iso into the MDKDVD directory on my home partition, so we do (as root):

 

mount -o loop -t iso9660 Mandrake_DVD.iso /home/feralertx/MDKDVD

 

And thats about it, you can use the MDKDVD directory as you like.

 

:lol: :lol:

[yellowchicken]

:D thanks!!

[papaschtroumpf]

Is there a way to make the mount point mountable by a user rather than root?

 

I want to create a /mnt/iso mount point where a user can mount an iso file from the hardrive (specifically this is to be able to play homeworld without having to insert a CD, but I want /mnt/iso to be the generic mount point for iso in loopback).

 

when I try to do the mount it tells me that only root can do that.

 

Do I need to add something like that to my fstab:

dev/loop0 /mnt/iso auto umask=0,user,iocharset=iso8859-1,codepage=850,noauto,ro,exec 0 0

 

how do I know which loop device to use?

 

 

EDIT: I do not want to dedicate a permanent mount point to the iso (i.e. not do something like adding "/full/path/isoimage.iso /mnt/iso iso9660 loop,user,noauto 0 0" to fstab

Edited September 13, 2004 by papaschtroumpf

[theYinYeti]

You could use /dev/loop9 for example. I guess other tools using loop devices are unlikely to conflict with the use of loop9; they'd rather use loop0, I suppose.

 

So yes, you could add a line like that to /etc/fstab:

/dev/loop9 /mnt/img udf,iso9660,vfat,msdos user,ro,...

 

Then you could have a "mymount.sh" script like that

#!/bin/bash
# $1: file (.iso, .img...) to mount

losetup /dev/loop9 "$1"
mount /mnt/img

And "myumount.sh" script like that

#!/bin/bash

umount /dev/loop9
losetup -d /dev/loop9

 

I don't know if losetup requires root's privileges. You may have to configure sudo for allowing losetup without a password, and then add sudo in front of the lines beginning with losetup.

 

Then you only have to configure your favourite file-manager to execute mymount.sh when you "open" a .iso or .img file. And put a shortcut icon somewhere for the umount part. But if you do this, be sure to add some security to the scripts: don't mount if already mounted; don't umount if not mounted.

 

Yves.

[papaschtroumpf]

Sounds like the right track. losetup can't be ran as a user though, and I keep reading that letting users losetup is a security risk.

 

Maybe I'm going to be stuck to have a dedicated entry for each iso in the fstab file, each with its own mount point. Yuck!

[theYinYeti]

Letting users use losetup is not a security risk if:

- you check that "$1" is, and ONLY is, ONE file ([ -f "$1" ]);

- you give access to losetup with sudo, and only for parameters "/dev/loop9 *" and "-d /dev/loop9";

- you take care of /etc/fstab options, such as nodev,noexec...

- you make sure /dev/loop9 is not mounted, nor attached, before trying to attach&mount it.

 

Yves.

Edited September 14, 2004 by theYinYeti

[papaschtroumpf]

is it more secure than adding the following to my sudoers file:

papaschtroumpf ALL=/bin/mount -t iso9660 *.iso /mnt/iso/ -o loop\,ro\,user

or even:

papaschtroumpf ALL = NOPASSWD: /bin/mount -t iso9660 *.iso /mnt/iso/ -o loop\,ro\,user

 

it seems that either way I'm letting user papaschtroumpf mount any iso with user permissions.

 

The game startup script then looks like:

 

#!/bin/sh

# Shell script wrapper for running Homeworld with the proper library search

# location and mounting the ISO so you don't need to insert the disk

 

# remove any previous mount

sudo umount /mnt/iso

 

# mount the ISO and make sure we point the game to it

sudo mount -t iso9660 homeworld-linux.iso /mnt/iso/ -o loop,ro,user

export HW_CDROM=/mnt/iso

 

# launch the game

LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH ./homeworld.bin $*

 

# now unmount the ISO

sudo umount /mnt/iso

Edited September 15, 2004 by papaschtroumpf