--- /dev/null
+#!/bin/sh -e
+#
+# Copyright © 2008 Andres Salomon <dilinger@queued.net>
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+
+
+IMG_NAME="DebOLPC"
+ROOT_SIZE="512"
+IMG_LABEL="DebOLPC"
+ROOT_DIR=""
+CRCIMG="./crcimg.pl"
+
+
+PREREQ_CMDS="losetup dd parted mke2fs tune2fs grub"
+
+check_for_cmds()
+{
+ err=0
+ for cmd in $PREREQ_CMDS; do
+ which $cmd >/dev/null || {
+ echo "Missing required command '$cmd'!" 1>&2
+ err=1
+ }
+ done
+ if [ "$err" = 1 ]; then
+ exit 1
+ fi
+}
+
+# @img - fs image to attach loop device to
+# @offset - if the image is partitioned, the offset to attach at
+#
+# sets $LOOP_DEV with the path of the newly attached loop device
+attach_loop()
+{
+ img="$1"
+ offset="$2"
+
+ LOOP_DEV=$(losetup -f)
+
+ if [ "$offset" != "" ]; then
+ losetup -o "$offset" "$LOOP_DEV" "$img"
+ else
+ losetup "$LOOP_DEV" "$img"
+ fi
+}
+
+# @dev - the loop device to detach
+detach_loop()
+{
+ losetup -d "$1"
+}
+
+# @img - fs image to mount
+# @type - fs type to mount
+# @offset - if the image is partitioned, the offset to mount at
+#
+# sets $MOUNT_POINT with the path of the newly created (and mounted) dir
+mk_mount()
+{
+ img="$1"
+ type="$2"
+ offset="$3"
+
+ if [ "$offset" != "" ]; then
+ offset=",offset=$offset"
+ fi
+
+ MOUNT_POINT=$(mktemp)
+ rm -f $MOUNT_POINT
+ mkdir $MOUNT_POINT
+
+ mount "$img" "$MOUNT_POINT" -o loop$offset -t "$type"
+}
+
+# @mntpt - directory to umount and delete
+rm_mount()
+{
+ umount "$1"
+ rmdir "$1"
+}
+
+# @img - image name to create
+# @size - image size
+mk_bootable_img()
+{
+ img="$1"
+ size="$2"
+
+ # first, create a sparse image
+ minus_size=$(($size * 6 / 100))
+ size=$(($size - $minus_size))
+ dd if=/dev/zero of=$img bs=1M count=1 seek=$(($size - 1))
+
+ # fill in the partition table
+ parted -s "$img" "mklabel msdos"
+ parted -s "$img" "mkpart primary ext2 0 -1"
+ parted -s "$img" "set 1 boot on"
+}
+
+# @mntpt - path to mounted root directory
+# @fstype - the root filesystem type (in a form that 'mount' understands)
+mk_fstab()
+{
+ mntpt="$1"
+ fstype="$2"
+
+ cat >${mntpt}/etc/fstab<<EOF
+LABEL=OLPCRoot / $fstype defaults,noatime 1 1
+devpts /dev/pts devpts gid=5,mode=620 0 0
+tmpfs /dev/shm tmpfs defaults,size=15% 0 0
+proc /proc proc defaults 0 0
+sysfs /sys sysfs defaults 0 0
+EOF
+
+}
+
+# @img - image name
+# @mntpt - path to mounted root directory
+grub_install()
+{
+ img="$1"
+ mntpt="$2"
+
+ mkdir -p ${mntpt}/boot/grub
+ cp /usr/lib/grub/i386-pc/stage[12] ${mntpt}/boot/grub
+ cp /usr/lib/grub/i386-pc/e2fs_stage1_5 ${mntpt}/boot/grub
+
+ cat >${mntpt}/boot/grub/menu.lst<<EOF
+default 0
+timeout 5
+color cyan/blue white/blue
+
+title $IMG_LABEL
+root (hd0,0)
+kernel /bzImage root=LABEL=${IMG_LABEL} rootfstype=ext3 ro
+boot
+EOF
+
+ # grub-install is pretty broken, so we do this manually
+ geom=`parted -s "$img" "unit chs" "print" | sed -ne 's/geometry: \([0-9]\+\),\([0-9]\+\),\([0-9]\+\)/:\1 \2 \3:/p' | cut -d: -f2`
+ grub --device-map=/dev/null <<EOF
+device (hd0) $img
+geometry (hd0) $geom
+root (hd0,0)
+setup (hd0)
+EOF
+
+}
+
+# @img - image to create a filesystem on
+# @label - fs label
+# @root_dir - root directory to populate the fs with
+mk_ext3_fs()
+{
+ img="$1"
+ label="$2"
+ root_dir="$3"
+
+ # parted 1.8 added --machine for easier parsing; however,
+ # debian still has 1.7 in unstable.
+ partition_start=$(parted -s "$img" "unit B" "print" | sed -ne 's/^ 1[[:space:]]\+//p' | cut -dB -f1)
+
+ # create the filesystem
+ attach_loop "$img" "$partition_start"
+ mke2fs -q -L "$label" -m0 -j "$LOOP_DEV"
+ tune2fs -c0 -i0 "$LOOP_DEV"
+ detach_loop "$LOOP_DEV"
+
+ # populate the filesystem
+ mk_mount "$img" "ext3" "$partition_start"
+ cp -ra "$root_dir"/* "$MOUNT_POINT" || true
+ mk_fstab "$MOUNT_POINT" "ext3"
+ grub_install "$img" "$MOUNT_POINT"
+ rm_mount "$MOUNT_POINT"
+}
+
+create_jffs2_img()
+{
+ mkfs.jffs2 -n -e128KiB -r "$1" -o "${IMG_NAME}.pre"
+ sumtool -n -p -e 128KiB -i "${IMG_NAME}.pre" -o "${IMG_NAME}.jffs2"
+ rm -f "${IMG_NAME}.pre"
+ $CRCIMG < ${IMG_NAME}.jffs2 > ${IMG_NAME}.jffs2.crc
+}
+
+
+usage()
+{
+ echo "" 1>&2
+ echo "Usage: $0 [<options>] <root directory>" 1>&2
+ echo "" 1>&2
+ echo "Options:" 1>&2
+ echo " -l <label> Image label" 1>&2
+ echo " -o <img> Image (base) filename" 1>&2
+ echo " -s <size> Root filesystem size (in MB)" 1>&2
+ echo "" 1>&2
+ exit 1
+}
+
+check_for_cmds
+
+while test $# != 0
+do
+ case $1 in
+ -l)
+ IMG_LABEL=$2
+ shift
+ ;;
+ -o)
+ IMG_NAME=$2
+ shift
+ ;;
+ -s)
+ ROOT_SIZE=$2
+ shift
+ ;;
+ *)
+ if [ "$#" != "1" ]; then
+ echo "Unknown option $1" 1>&2
+ usage
+ else
+ ROOT_DIR="$1"
+ fi
+ ;;
+ esac
+ shift
+done
+
+if [ "$(id -u)" != "0" ]; then
+ echo "" 1>&2
+ echo "*** Error: must be run as root!" 1>&2
+ echo "" 1>&2
+ exit 2
+fi
+
+if [ "$ROOT_DIR" = "" ]; then
+ echo "" 1>&2
+ echo "*** No root directory specified!" 1>&2
+ usage
+fi
+if [ ! -d "$ROOT_DIR" ]; then
+ echo "" 1>&2
+ echo "*** Unable to find root directory!" 1>&2
+ usage
+fi
+
+mk_bootable_img "${IMG_NAME}.ext3.img" "$ROOT_SIZE"
+mk_ext3_fs "${IMG_NAME}.ext3.img" "$IMG_LABEL" "$ROOT_DIR"
+
+#mount ${IMG_NAME}.ext3 $MOUNT_POINT -o loop,offset=$OS_PART1_BEGIN -t ext3
+#cp -r "$ROOT_DIR"/* $MOUNT_POINT
+#create_jffs2_img $MOUNT_POINT
+#umount $MOUNT_POINT
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