#!/bin/bash
-################################################################################
-# Filename: grml2iso
-# Purpose: create a multiboot ISO using grml2usb
-# Author: Michael Prokop <mika@grml.org>,
-# Thorsten Glaser <tg@mirbsd.org>
+# Filename: grml2iso
+# Purpose: create a multiboot grml ISO using grml2usb
+# Authors: Michael Prokop <mika@grml.org>,
+# Thorsten Glaser <tg@mirbsd.org>
+# Bug-Reports: see http://grml.org/bugs/
+# License: This file is licensed under the GPL v2 or any later version.
################################################################################
# TODO:
-# * generalise the script so we can provide it as part of the grml2usb suite
-# * improve error handling
# * support isolinux as bootloader on the ISO
+# * support setting grml2usb options (e.g. --bootoptions=...)
################################################################################
-# define function getfilesize before "set -e"
-if stat --help >/dev/null 2>&1; then
- getfilesize='stat -c %s' # GNU stat
-else
- getfilesize='stat -f %z' # BSD stat
-fi
-
-usage() {
- echo >&2 "Usage: $0 target.iso source1.iso [source2.iso ...]"
- exit 1
-}
-
-set -e
-set -u
+# define function getfilesize before "set -e" {{{
+ if stat --help >/dev/null 2>&1; then
+ getfilesize='stat -c %s' # GNU stat
+ else
+ getfilesize='stat -f %z' # BSD stat
+ fi
+# }}}
-# ********* PLEASE ADJUST! *******************************************
-# specify path to the grml2usb script you'd like to use
-GRML2USB='grml2usb'
+# adjust variables if necessary through environment {{{
+# path to the grml2usb script you'd like to use
+ [ -n "$GRML2USB" ] || GRML2USB='grml2usb'
# work directory for creating the filesystem
-WRKDIR='/dev/shm/grml2iso.tmp'
-# ********* PLEASE ADJUST! *******************************************
+ [ -n "$WRKDIR" ] || WRKDIR='/tmp/grml2iso.tmp'
+# }}}
+
+# helper stuff {{{
+ set -e
+
+ usage() {
+ echo >&2 "Usage: $0 -o target.iso source1.iso [source2.iso ...]"
+ [ -n "$1" ] && exit $1 || exit 1
+ }
+# }}}
+
+# command line handling {{{
+ [[ $# -gt 2 ]] || usage 1
+
+ ISOFILE=''
+ while getopts ao: name; do
+ case $name in
+ o) ISOFILE="$OPTARG";;
+ ?) usage 2;;
+ esac
+ done
-test $# -lt 2 && usage
-if test -e "$1"; then
- echo >&2 Error: target file "'$1'" already exists.
- usage
-fi
-ISOFILE=$1; shift
+# make sure -o is specified
+ [ -n "$ISOFILE" ] || usage 1
-# variables
- ORIG_DIR="$(pwd)"
- # note: grub-pc_1.96+20090603-1_i386.deb seems to be b0rken
- GRUB_DEB="grub-pc_1.96+20080724-16_i386.deb"
+# we don't to override any files by accident
+ if [ -e "$ISOFILE" ]; then
+ echo "Error: target file $ISOFILE exists already." >&2
+ exit 1
+ fi
-# normalise path (in mksh I’d just use the realpath builtin…)
-case $ISOFILE in
-/*) ;;
-*) ISOFILE=$ORIG_DIR/$ISOFILE ;;
-esac
+ shift $(($OPTIND - 1))
+# }}}
-# create necessary stuff under WRKDIR
+# we need root permissions for executing grml2usb {{{
+ if [[ $(id -u) != 0 ]]; then
+ echo >&2 "Error: please run $0 as root."
+ exit 1
+ fi
+# }}}
+
+# variables {{{
+ ORIG_DIR="$(pwd)"
+ # note: grub-pc_1.96+20090603-1 seems to be b0rken
+ GRUB_VERSION="grub-pc_1.96+20080724-16"
+
+# normalise path
+ case $ISOFILE in
+ /*) ;;
+ *) ISOFILE=$ORIG_DIR/$ISOFILE ;;
+ esac
+# }}}
+
+# create necessary stuff under WRKDIR {{{
+ [ -d "$WRKDIR" ] && WRKDIR_EXISTED='true' || WRKDIR_EXISTED='false'
rm -rf "$WRKDIR/cddir" "$WRKDIR/grub_tmp"
mkdir -p "$WRKDIR/cddir" "$WRKDIR/grub_tmp"
+# }}}}
-# execute grml2usb with all ISOs you'd like to install
+# execute grml2usb with all ISOs you'd like to install {{{
$GRML2USB "$@" "$WRKDIR/cddir"
+# }}}
-# install grub2 files
+# install grub2 files {{{
# as we don't want to rely on a grub2 installation on the
# running system let's grab it from the net
+ if which dpkg >/dev/null 2>&1 ; then
+ ARCH="$(dpkg --print-architecture)"
+ else
+ [[ $(uname -m) == x86_64 ]] && ARCH=amd64 || ARCH=i386
+ fi
+ GRUB_DEB="${GRUB_VERSION}_${ARCH}.deb"
+
cd "$WRKDIR"/grub_tmp/
wget http://ftp.de.debian.org/debian/pool/main/g/grub2/"$GRUB_DEB"
ar x "$GRUB_DEB"
cat usr/lib/grub/i386-pc/cdboot.img "$WRKDIR"/cddir/boot/grub/core.img \
> "$WRKDIR"/cddir/boot/grub/eltorito.img
cd "$WRKDIR/cddir"
+# }}}
-# finally generate the CD/DVD-iso
+# generate the CD/DVD ISO {{{
mkisofs -V 'grml-multiboot' -l -r -J -no-pad \
-no-emul-boot -boot-load-size 4 -boot-info-table \
-b boot/grub/eltorito.img -c boot/grub/eltorito.cat \
-o "$ISOFILE" .
+# }}}
-# pad the output ISO to multiples of 256 KiB for partition table support
+# pad the output ISO to multiples of 256 KiB for partition table support {{{
siz=$($getfilesize "$ISOFILE")
- cyls=$(echo "$siz / 512 / 32 / 16 + 1" | bc) # C=$cyls H=16 S=32
- ofs=$(echo "$cyls * 16 * 32 * 512 - 1" | bc) # padding offset (size - 1)
+ cyls=$(echo "$siz / 512 / 32 / 16 + 1" | bc) # C=$cyls H=16 S=32
+ ofs=$(echo "$cyls * 16 * 32 * 512 - 1" | bc) # padding offset (size - 1)
dd if=/dev/zero bs=1 count=1 seek=$ofs of="$ISOFILE" 2>/dev/null
+# }}}
-# create a manifold-boot image with a partition table, if possible
+# create a manifold-boot image with a partition table, if possible {{{
if mksh -c true 2>/dev/null && \
test -e /usr/share/grml-live/scripts/bootgrub.mksh; then
echo "Creating a manifold-boot ISO image"
else
echo "Cannot find mksh or bootgrub.mksh, not generating manifold-boot ISO image"
fi
+# }}}
-# cleanup
+# cleanup {{{
cd "$ORIG_DIR"
sync
rm -rf "$WRKDIR/cddir" "$WRKDIR/grub_tmp"
-
-# we are done :)
+ [[ $WRKDIR_EXISTED = 'false' ]] && rmdir "$WRKDIR"
echo "Generated $ISOFILE"
+# }}}
## EOF #########################################################################
+# vim:foldmethod=marker ts=2 ft=sh ai expandtab tw=80 sw=3