Hi, looking over the system dependencies in our project i come to the xorriso mount helper.
It reads the table-of-content of multi-session media or files and produces a mount command for mounting a particular session. Typically used to retrieve older states from multi-session backups. I read from the porting instructions that i shall assume userland to be like Linux. But this line is a bit obscure to me: Example of uname check: Linux|GNU|GNU/*) I could need an example of the string which uname(&uts); returns as uts.sysname Currently recognized: "FreeBSD" and "Linux". Another question is the mount command option by which one can address a non-default superblock in an ISO 9660 image. On Linux: mount -t iso9660 -o sbsector=... On FreeBSD: mount_cd9660 -s ... Given we have an ISO 9660 image with several sessions of which one starts at block number 122880, would this Linux shell command work for the superuser ? mount -t iso9660 \ -o nodev,noexec,nosuid,ro,sbsector=122880 \ /dev/cd0 /mnt On FreeBSD xorriso would issue this line mount_cd9660 -o noexec,nosuid -s 122880 \ /dev/cd0 /mnt PS: I am subscribed now. No need to Cc me any more. ------------------------------------------------ The following are test proposals for the case that my question cannot be answered flatly. The mount commands mount the last session on CD by default. The first session has block address 0. So at least this one is easy to find on any multi-session CD. Linux: -o sbsector=0 FreeBSD: -s 0 Typically you will see more files in the last session than in the first session. A multi-session CD-RW is traditionally produced by interaction of mkisofs and cdrecord. First session: mkisofs -graft-points \ /tree1=prepared_for_iso/tree1 | \ cdrecord -v dev=/dev/cd0 blank=fast -multi -eject - Follow-up session: m=$(cdrecord dev=/dev/cd0 -msinfo) mkisofs -graft-points -M /dev/cd0 -C $m \ /tree2=prepared_for_iso/tree2 | \ cdrecord -v dev=/dev/cd0 -waiti -multi -eject - "mkisofs" and "cdrecord" stand for the originals or for compatible programs like genisoimage, wodim, xorriso -as mkisofs, cdrskin. The Debian xorriso package can produce multi-session ISO images in disk files. For mount, this should make no difference. First session: xorriso -dev /tmp/image.iso -blank as_needed \ -map prepared_for_iso/tree1 /tree1 Follow-up session: xorriso -dev /tmp/image.iso \ -map prepared_for_iso/tree2 /tree2 Here the first session begins at block 32. At block 0 there is a superblock copy of the last session. ("superblock" means System Area plus Volume Descriptors. Usually 18 blocks.) When mounting sbsector=0 on CD resp. sbsector=32 in disk file you should only see /mnt/tree1. When mounting with no sbsector option you should see both, /mnt/tree1 and /mnt/tree2. ------------------------------------------------ Have a nice day :) Thomas -- To UNSUBSCRIBE, email to debian-bsd-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org