#!/bin/bash

Usage()
{
cat <<__USAGE__
Usage: ltsp-mkbootiso [OPTIONS]
Make boot iso image with kernel and initrd for boot LTSP5 client via CD-ROM
  -h, --help             display this help and exit
  -,  --stdout           write iso file to stdout
  -o, --output ISO_FILE  write iso to ISO_FILE (./ltsp-boot.iso)
  -c, --conf CONF_FILE   use CONF_FILE as isolinux.cfg (/boot/pxelinux.cfg/default)
  -b, --boot BOOT_FILE   use BOOT_FILE as isolinux.bin (/usr/lib/syslinux/isolinux.bin)
  -v, --version VER      use kernel version VER
  -r, --root DIR         LTSP-client root directory
__USAGE__
exit 0
}

VER=
CONF_FILE=/boot/pxelinux.cfg/default
BOOT_FILE=/usr/lib/syslinux/isolinux.bin
ISO_FILE=ltsp-boot.iso
CHROOT=

while [ $# -ne 0 ]; do
    case "$1" in
	-h|--help) Usage ;;
	-v|--version)
	    VER=$2
	    shift 2
	    ;;
	-b|--boot)
	    BOOT_FILE=$2
	    shift 2
	    ;;
	-c|--conf)
	    CONF_FILE=$2
	    shift 2
	    ;;
	-|--stdout)
	    ISO_FILE=
	    shift
	    ;;
	-o|--output)
	    ISO_FILE=$2
	    shift 2
	    ;;
	-r|--root)
	    CHROOT=$2
	    shift 2
	    ;;
	*)
	    echo "Unknown key $1 !" >&2
	    exit 2
	    ;;
    esac
done

if [ -f /etc/ltsp_chroot ]; then
    CHROOT=
elif [ -z "$CHROOT" -a -r /etc/ltsp/ltsp-build-client.conf ]; then
    . /etc/ltsp/ltsp-build-client.conf
    CHROOT=$BASE/$ARCH
fi

KERNEL=$CHROOT/boot/vmlinuz${VER:+-}$VER
INITRD=$CHROOT/boot/initrd${VER:+-}$VER.img
CONF_FILE=$CHROOT${CHROOT:+/}$CONF_FILE
FILES="$BOOT_FILE $KERNEL $INITRD $CONF_FILE"

for f in $FILES; do
    if ! [ -f "$f" ]; then
	echo "Can't found $f !" >&2
	exit 1
    fi
done

Dir=`mktemp -t -d ltsp5-iso.XXXX`
cp -L "$BOOT_FILE" "$Dir"/isolinux.bin
cp -L "$KERNEL" "$Dir"/vmlinuz
cp -L "$INITRD" "$Dir"/initrd.img
cp -L "$CONF_FILE" "$Dir"/isolinux.cfg

mkisofs ${ISO_FILE:+-o }"$ISO_FILE" -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table "$Dir"

rm -rf "$Dir"