#!/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.

set -e

HERE="$(dirname "$(readlink -f "${0}")")"
. ${HERE}/install-boot.sh

if [ -z $ETDUMP ]; then
    ETDUMP=etdump
fi

if [ -z $MAKEFS ]; then
    MAKEFS=makefs
fi

if [ -z $MKIMG ]; then
    MKIMG=mkimg
fi

if [ "$1" = "-b" ]; then
    BASEBITSDIR="$4"
    # This is highly x86-centric and will be used directly below.
    bootable="-o bootimage=i386;$BASEBITSDIR/boot/cdboot -o no-emul-boot"

    # Make EFI system partition.
    espfilename=$(mktemp /tmp/efiboot.XXXXXX)
    # ESP file size in KB.
    espsize="2048"
    make_esp_file ${espfilename} ${espsize} ${BASEBITSDIR}/boot/loader.efi
    bootable="$bootable -o bootimage=i386;${espfilename} -o no-emul-boot -o platformid=efi"

    shift
else
    BASEBITSDIR="$3"
    bootable=""
fi

if [ $# -lt 3 ]; then
    echo "Usage: $0 [-b] image-label image-name base-bits-dir [extra-bits-dir]"
    exit 1
fi

LABEL=`echo "$1" | tr '[:lower:]' '[:upper:]'`; shift
NAME="$1"; shift

publisher=" "
### echo "/dev/iso9660/$LABEL / cd9660 ro 0 0" > "$BASEBITSDIR/etc/fstab"
$MAKEFS -t cd9660 $bootable -o rockridge -o label="$LABEL" -o publisher="$publisher" "$NAME" "$@"
rm -f "$BASEBITSDIR/etc/fstab"
rm -f ${espfilename}

if [ "$bootable" != "" ]; then
    # Look for the EFI System Partition image we dropped in the ISO image.
    for entry in `$ETDUMP --format shell $NAME`; do
        eval $entry
        if [ "$et_platform" = "efi" ]; then
            espstart=`expr $et_lba \* 2048`
            espsize=`expr $et_sectors \* 512`
            espparam="-p efi::$espsize:$espstart"
            break
        fi
    done

    # Create a GPT image containing the partitions we need for hybrid boot.
    imgsize=`stat -f %z "$NAME"`
    $MKIMG -s gpt \
        --capacity $imgsize \
        -b "$BASEBITSDIR/boot/pmbr" \
        -p freebsd-boot:="$BASEBITSDIR/boot/isoboot" \
        $espparam \
        -o hybrid.img

    # Drop the PMBR, GPT, and boot code into the System Area of the ISO.
    dd if=hybrid.img of="$NAME" bs=32k count=1 conv=notrunc
    rm -f hybrid.img
fi
