+
+if [ -r ${libdir}/grub/grub-mkconfig_lib ] ; then
+ . ${libdir}/grub/grub-mkconfig_lib
+elif [ -r /usr/share/grub/grub-mkconfig_lib ] ; then # fallback for e.g. Fedora
+ . /usr/share/grub/grub-mkconfig_lib
+else
+ echo "Could not locate file grub-mkconfig_lib, please report a bug." >&2
+fi
+
+# default unless configured otherwise:
+ISO_LOCATION="/boot/grml"
+
+if [ -r /etc/default/grml-rescueboot ] ; then
+ . /etc/default/grml-rescueboot
+fi
+
+resolve_dm_name() {
+ retval="$1"
+ base=${1##*/}
+ for block in /sys/block /sys/class/block ; do
+ [ ! -d ${block}/${base}/dm ] && continue
+ retval="/dev/mapper/$(cat ${block}/${base}/dm/name)"
+ break
+ done
+ case "$retval" in
+ /dev/dm-*)
+ minor=${retval##*-}
+ retval="/dev/mapper/$(dmsetup info -C --noheadings -o name -j 253 -m $minor)"
+ ;;
+ esac
+
+ echo "$retval"
+}
+
+get_dependencies() {
+ device=${1}
+ if [ -z ${device} ] ; then
+ return
+ fi
+ device=$(readlink -f ${device})
+ case "$device" in
+ /dev/mapper/*)
+ device="/dev/dm-$(dmsetup info -C --noheadings -o minor "$device")"
+ ;;
+ esac
+
+ base=${device##*/}
+ dependencies=""
+ additional_dependencies=""
+ for block in /sys/block /sys/class/block ; do
+ [ ! -d ${block}/${base}/slaves ] && continue
+ for file in ${block}/${base}/slaves/* ; do
+ dep_name="/dev/${file##*/}"
+ dep_name=$(resolve_dm_name ${dep_name})
+
+ # resolve recursively all dependencies
+ additional_dependencies=$(get_dependencies ${dep_name})
+
+ dependencies="$dependencies $additional_dependencies $dep_name"
+ done
+ break
+ done
+ echo $dependencies
+}
+
+get_iso_identifier() {
+ local iso="$1"
+ local id=
+ if isoinfo --version >/dev/null 2>&1 ; then
+ id=$(isoinfo -d -i "${iso}" | grep '^Volume id:' | sed -e 's/^[^:]*: *//')
+ [ -n "${id}" ] || id=$(isoinfo -d -i "${iso}" | grep '^Application id:' | sed -e 's/^[^:]*: *//')
+ fi
+ echo "${id}"
+}
+
+iso_list=""
+for file in "${ISO_LOCATION}"/*.iso ; do
+ if grub_file_is_not_garbage "$file" ; then
+ iso_list="$iso_list $file "
+ fi
+done
+
+indent=' '
+submenu_indent=
+if [ -n "${GRUB_SUBMENU}" ] && [ -n "${iso_list}" ] ; then
+ echo "submenu \"${GRUB_SUBMENU}\" \$menuentry_id_option \"grml-rescueboot\" {"
+ submenu_indent="${indent}"
+fi
+
+for grmliso in $iso_list ; do
+ rel_dirname="$(dirname $(make_system_path_relative_to_its_root $grmliso))"
+ grml="$(basename $grmliso)"
+ device="$(${grub_probe} -t device ${grmliso})"
+
+ additional_param=""
+
+ case "$device" in
+ /dev/mapper*|/dev/md*)
+ dependencies=$(get_dependencies ${device})
+ dep_string=""
+ for dep in $dependencies $device ; do
+ case "$dep" in
+ /dev/md*)
+ md_name="$(mdadm --detail --export "$dep" | sed -ne 's/MD_NAME=//p')"
+ dep="/dev/md/$md_name"
+ esac
+ dep_string="$dep_string,$dep"
+ done
+ dep_string=${dep_string#,}
+ additional_param="live-media=$dep_string"
+ ;;
+ esac
+
+ echo "Found grml-rescueboot ISO image: ${grmliso}" >&2
+ iso_id=$(get_iso_identifier "${grmliso}")
+ if [ -n "${iso_id}" ] ; then
+ title="${iso_id} (${grml})"
+ else
+ title="${grml}"
+ fi
+ grub_prep=$(prepare_grub_to_access_device "${device}" | sed -e "s/^/${indent}/")
+ grub_iso_path="${rel_dirname%/}/${grml}"
+
+ sed -e "s/^/${submenu_indent}/" << EOF
+menuentry "${title}" {
+${grub_prep}
+ iso_path="${grub_iso_path}"
+ export iso_path
+ kernelopts=" $CUSTOM_BOOTOPTIONS $additional_param "
+ export kernelopts
+ # support booting recent GRUB versions on UEFI systems
+ # (see bugs.debian.org/959425)
+ rmmod tpm
+ loopback loop "\$iso_path"
+ set root=(loop)
+ configfile /boot/grub/loopback.cfg
+ unset root
+ loopback -d loop
+ unset iso_path
+ unset kernelopts
+}