+ # pad the output ISO to multiples of 256 KiB for partition table support
+ siz=$($getfilesize "${ISO_OUTPUT}/${ISO_NAME}")
+ cyls=$((siz / 512 / 32 / 16 + 1)) # C=$cyls H=16 S=32
+ siz=$((cyls * 16 * 32 * 512)) # size after padding
+ dd if=/dev/zero bs=1 count=1 seek=$((siz - 1)) \
+ of="${ISO_OUTPUT}/${ISO_NAME}" 2>/dev/null
+
+ # support disabling hybrid ISO image
+ if [ "$HYBRID_METHOD" = "disable" ] ; then
+ log "Skipping creation of hybrid ISO file as requested via HYBRID_METHOD=disable"
+ einfo "Skipping creation of hybrid ISO file as requested via HYBRID_METHOD=disable"
+ eend 0
+ elif [ "$HYBRID_METHOD" = "manifold" ] || [ "$HYBRID_METHOD" = "grub2" ] ; then
+ # isoinfo is part of both mkisofs and genisoimage so we're good
+ bootoff=$(isoinfo -l -i "${ISO_OUTPUT}/${ISO_NAME}" | \
+ sed -n '/^.*\[ *\([0-9]*\)[] ].* ISOLINUX.BIN[;1]* *$/s//\1/p')
+
+ if ! [ -r boot/grub/core.img ] ; then
+ log "boot/grub/core.img not found, not creating manifold boot ISO file"
+ ewarn "boot/grub/core.img not found, not creating manifold boot ISO file"
+ elif [ "${bootoff:-0}" -lt 1 ] ; then
+ log "isolinux.bin not found on the ISO file, disabling manifold boot"
+ ewarn "isolinux.bin not found on the ISO file, disabling manifold boot"
+ else
+ if [ "$HYBRID_METHOD" = "grub2" ] ; then
+ log "Creating hybrid ISO file with manifold/grub2 method"
+ einfo "Creating hybrid ISO file with manifold/grub2 method"
+ # 512 bytes: MBR, partition table, load GRUB 2
+ echo 4 63 | mksh /usr/share/grml-live/scripts/bootgrub.mksh -A -M 4:0x96 -g $cyls:16:32
+ else
+ log "Creating hybrid ISO file with manifold method"
+ einfo "Creating hybrid ISO file with manifold method"
+ # read only one but 2048-byte sized (scale: << 2) sector
+ echo $bootoff $bootoff | \
+ mksh /usr/share/grml-live/scripts/bootilnx.mksh -A -M 4:0x96 -g $cyls:16:32 -S 2
+ fi | dd of="${ISO_OUTPUT}/${ISO_NAME}" conv=notrunc 2>/dev/null
+ eend $?
+ fi
+ elif [ "$HYBRID_METHOD" = "isohybrid" ] ; then
+ if ! which isohybrid >/dev/null 2>&1 ; then
+ bailout 12 "isohybrid binary not found - please install syslinux/syslinux-common"
+ else
+ log "Creating hybrid ISO file with isohybrid method"
+ einfo "Creating hybrid ISO file with isohybrid method"
+ # Notes for consideration:
+ # "-entry 4 -type 1c"
+ # * using 4 as the partition number is supposed to help with BIOSes
+ # that only support USB-Zip boot
+ # * using 1c (i.e. hidden FAT32 LBA), instead of the default 0x17
+ # (hidden NTFS, IIRC), as the partition type is sometimes needed
+ # to get the BIOS even look at the partition created by isohybrid
+ if isohybrid --help | grep -q -- --uefi ; then
+ if echo $CLASSES | grep -qw I386 ; then
+ log "Detected uefi support for isohybrid but 32bit systems do not support it, ignoring."
+ einfo "Detected uefi support for isohybrid but 32bit systems do not support it, ignoring."
+ else
+ log "Detected uefi support for isohybrid, enabling"
+ einfo "Detected uefi support for isohybrid, enabling"
+ ISOHYBRID_OPTIONS=--uefi
+ fi
+ fi
+
+ log "isohybrid $ISOHYBRID_OPTIONS ${ISO_OUTPUT}/${ISO_NAME}"
+ isohybrid $ISOHYBRID_OPTIONS "${ISO_OUTPUT}/${ISO_NAME}"
+ eend $?
+ fi
+ else
+ bailout 12 "Unknown HYBRID_METHOD [${HYBRID_METHOD}]. Supported values: disable, isohybrid, grub2, manifold"
+ fi
+
+ # generate md5sum and sha1sum of ISO if we are using class 'RELEASE':
+ case $CLASSES in *RELEASE*)