Making a mounted ISO image of a CD-ROM writable
cyberleo at cyberleo.net
Fri Jul 13 11:17:25 UTC 2007
Paul Hoffman wrote:
> At 10:53 PM +0200 7/12/07, Roland Smith wrote:
>> On Thu, Jul 12, 2007 at 12:38:10PM -0700, Paul Hoffman wrote:
>>> Greetings again. I want to make an ISO image of the FreeBSD
>>> with a boot.config file that contains "/boot/loader -h". I have the ISO
>>> image as a file on my hard drive, and have mounted it on /mnt:
>>> mdconfig -a -t vnode -f /path/to/my/bootable.iso -u 0
>>> mount -w -t cd9660 /dev/md0 /mnt
>>> However, when I try to create files on /mnt, I get:
>>> -su: boot.config: Read-only file system
>>> How do I make it so that I can write into /mnt so that I can then later
>>> save those back to the ISO image?
>> Try the sysutils/isomaster port.
> Er, thanks, but I am running on a text-only system. Looks nice, however.
> Other thoughts? I would hope this would be as easy as "run this program
> to change the image to read-write".
Due to the way iso9660 (cd) filesystems are arranged, they cannot be
written to after they are created. The easiest option would be to copy
all the files to a directory on your hard disk, make the required
changes, and use mkisofs to regenerate a new iso9660 filesystem.
This will likely require more than a cursory perusal of mkisofs(8),
given that you wish to create a bootable CD.
<CyberLeo at CyberLeo.Net>
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