#!/bin/sh
#
# Module: mkisoimages.sh
# Author: Jordan K Hubbard
# Date:   22 June 2001
#
# $FreeBSD$
#
# This script is used by release/Makefile to build the (optional) ISO images
# for a FreeBSD release.  It is considered architecture dependent since each
# platform has a slightly unique way of making bootable CDs.  This script
# is also allowed to generate any number of images since that is more of
# publishing decision than anything else.
#
# Usage:
#
# mkisoimages.sh [-b] image-label image-name base-bits-dir [extra-bits-dir]
#
# Where -b is passed if the ISO image should be made "bootable" by
# whatever standards this architecture supports (may be unsupported),
# image-label is the ISO image label, image-name is the filename of the
# resulting ISO image, base-bits-dir contains the image contents and
# extra-bits-dir, if provided, contains additional files to be merged
# into base-bits-dir as part of making the image.
if [ $# -lt 3 ]; then
	echo Usage: $0 '[-b] image-label image-name base-bits-dir [extra-bits-dir]' > /dev/stderr
	exit 1
fi

case $1 in
-b)	BOPT=$1; shift ;;
esac
LABEL=`echo $1 | tr '[:lower:]' '[:upper:]'`; shift
NAME=$1; shift
BASEBITSDIR=$1

# Create an ISO image
publisher="The FreeBSD Project.  http://www.FreeBSD.org/"
echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > "${BASEBITSDIR}/etc/fstab"
makefs -t cd9660 -o rockridge -o label="$LABEL" -o publisher="$publisher" ${NAME}.tmp $*
rm "${BASEBITSDIR}/etc/fstab"

if [ "x$BOPT" != "x-b" ]; then
	mv ${NAME}.tmp ${NAME}
	exit 0
fi

TMPIMGDIR=`mktemp -d /tmp/bootfs.XXXXXXXX` || exit 1
BOOTFSDIR="${TMPIMGDIR}/bootfs"
BOOTFSIMG="${TMPIMGDIR}/bootfs.img"

# Create a boot filesystem
mkdir -p "${BOOTFSDIR}/boot"
cp -p "${BASEBITSDIR}/boot/loader" "${BOOTFSDIR}/boot"
makefs -t ffs -B be -M 512k "${BOOTFSIMG}" "${BOOTFSDIR}"
dd if="${BASEBITSDIR}/boot/boot1" of="${BOOTFSIMG}" bs=512 conv=notrunc,sync

# Create a boot ISO image
: ${CYLSIZE:=640}
ISOSIZE=$(stat -f %z ${NAME}.tmp)
ISOBLKS=$(((${ISOSIZE} + 511) / 512))
ISOCYLS=$(((${ISOBLKS} + (${CYLSIZE} - 1)) / ${CYLSIZE}))

BOOTFSSIZE=$(stat -f %z "${BOOTFSIMG}")
BOOTFSBLKS=$(((${BOOTFSSIZE} + 511) / 512))
BOOTFSCYLS=$(((${BOOTFSBLKS} + (${CYLSIZE} - 1)) / ${CYLSIZE}))

ENDCYL=$((${ISOCYLS} + ${BOOTFSCYLS}))
NSECTS=$((${ENDCYL} * 1 * ${CYLSIZE}))

dd if=${NAME}.tmp of=${NAME} bs=${CYLSIZE}b conv=notrunc,sync
dd if=${BOOTFSIMG} of=${NAME} bs=${CYLSIZE}b seek=${ISOCYLS} conv=notrunc,sync
# The number of alternative cylinders is always 2.
dd if=/dev/zero of=${NAME} bs=${CYLSIZE}b seek=${ENDCYL} count=2 conv=notrunc,sync
rm -rf ${NAME}.tmp ${TMPIMGDIR}

# Write VTOC8 label to boot ISO image
MD=`mdconfig -a -t vnode -S 512 -y 1 -x ${CYLSIZE} -f ${NAME}`
gpart create -s VTOC8 ${MD}
# !4: usr, for ISO image part
gpart add -i 1 -s $((${ISOCYLS} * ${CYLSIZE} * 512))b -t \!4 ${MD}
# !2: root, for bootfs part.
gpart add -i 6 -s $((${BOOTFSCYLS} * ${CYLSIZE} * 512))b -t \!2 ${MD}
mdconfig -d -u ${MD#md}