On Tue, Nov 16, 2010 at 8:27 PM, Eric Shattow "Eprecocious" < [email protected]> wrote:
> Backing the topic up a bit, how about doing the extracting using > libcdio? extricate.c makes use of linux/cdrom.h which is not > portable. A libcdio-based tool would be preferable. > Patches are most welcome. > > On Thu, Apr 15, 2010 at 12:12 PM, Thomas Schmitt <[email protected]> > wrote: > > Hi, > > > >> Using isoinfo (NOT iso-info) it seems stuff is in place: > >> [morituri-uninstalled] [tho...@otto trunk]$ isoinfo -N 207106 -i > >> Ladyhawke\ -\ Ladyhawke/data.iso -l > > > > So the offset 207106 seems to be the right one. > > (I found this helptext of isoinfo: > > http://www.herongyang.com/CD-DVD/Data-CD-ISO-9660-isoinfo.html > > "-N sector Sector number where ISO image should start on CD" > > ) > > > > > >> a) can I write this (wrong) iso as is to a mixed mode cd to make a > >> perfect copy of my cd ? > > > > You will have to put it exactly to offset 207106 > > so that it works unaltered. > > Possibly one can do that with cdrecord -sao or > > some -raw* option if one has suitable input files > > for the tracks which come before the ISO track. > > > > But that's outside of my own experience. > > > > > >> I couldn't get this to mount either: > >> [r...@otto thomas]# mount -t iso9660 -o loop,sbsector=207106 dummy.iso > /mnt/iso/ > > > > Did you append the image to the end of a file of > > exactly the right size ? > > In this case: > > > > dd if=/dev/zero \ > > bs=2K count=1 seek=207105 \ > > of=cd_dummy.iso > > > > Note that you have to seek to (207106 - 1) > > and then write 1 block, to get 207106 blocks. > > > > Does this cd_dummy.iso show with ls -l a size of > > 424153088 bytes ? (Before you append data.iso) > > > > > > I just tried this with a multi-session CD on > > Debian 5.04. Track start block is 109287, > > track size is 3497: > > > > $ dd if=/dev/hda bs=2048 skip=109287 count=3497 of=track1.iso > > $ dd if=/dev/zero bs=2K count=1 seek=109286 of=cd_dummy.iso > > $ cat track1.iso >> cd_dummy.iso > > $ su > > # mount -t iso9660 -o loop,sbsector=109287 cd_dummy.iso /mnt > > # ls /mnt > > > > shows lots of files. > > > > > > ------------------------------------------------ > > > >> > Adventurous testers could try losetup option -o > >> > with a negative value or mount option "offset". > >> What value would this be there ? I tried in a loop with lots of values, > >> none worked. > > > > I would have thought that this might work > > > > # losetup -f > > /dev/loop0 > > # losetup -o -207106 /dev/loop0 data.iso > > # mount -t iso9660 -o sbsector=207106 /dev/loop0 /mnt > > > > but on Debian 5.04 (with 109287) it doesn't. > > > > > > > > > > > > > >
