#!/bin/sh

secs=`expr 32 '*' 64`

make_hdimage()
{
	dd if=$TMPDISK of=usrimage bs=$BS count=$USRBLOCKS

	rootsize=`stat -size rootimage`
	usrsize=`stat -size usrimage`

	rootsects=`expr $rootsize / 512`
	usrsects=`expr $usrsize / 512`

	# installboot -m needs at least 1KB 
	dd < /dev/zero >tmpimage count=2
	partition -fm tmpimage 2 81:$rootsects* 0:0 81:$usrsects
	installboot -m tmpimage /usr/mdec/masterboot
	dd < tmpimage > subpart count=1

	primsects=`expr 1 + $rootsects + $usrsects`
	cyl=`expr '(' $primsects ')' / $secs + 1`
	padsects=`expr $cyl \* $secs - 1 - $primsects`

	{ dd < /dev/zero count=1
		cat subpart
		cat rootimage
		cat usrimage
		dd < /dev/zero count=$padsects
	} > hdimage
	partition -m hdimage 81:`expr $primsects + $padsects`*
	installboot -m hdimage /usr/mdec/masterboot
}

hdemu_root_changes()
{
	$RELEASEDIR/usr/bin/installboot -d $RAM \
		$RELEASEDIR/usr/mdec/bootblock boot/boot
	echo \
'label=BIOS
bootcd=2
disable=inet
bios_remap_first=1
ramimagedev=c0d7p0s0
save'	| $RELEASEDIR/usr/bin/edparams $RAM

	echo \
'root=/dev/c0d7p0s0
usr=/dev/c0d7p0s2
usr_roflag="-r"' > $RELEASEDIR/etc/fstab
}

HDEMU=1

COPYITEMS="usr/bin bin usr/lib"
RELEASEDIR=/usr/r/release
IMAGE=cdfdimage
ROOTIMAGE=rootimage
CDFILES=/usr/tmp/cdreleasefiles
sh tell_config OS_RELEASE . OS_VERSION >/tmp/rel.$$
version_pretty=`sed 's/["      ]//g;/^$/d' </tmp/rel.$$`
version=`sed 's/["      ]//g;/^$/d' </tmp/rel.$$ | tr . _`
ISO=minix${version}_`date +%Y%m%d-%H%M%S`.iso
ISOGZ=${ISO}.gz
echo $ISOGZ
RAM=/dev/ram
BS=4096

HDEMU=0
COPY=0
QUICK=0

while getopts "chaq?" c
do
	case "$c" in
	\?)
		echo "Usage: $0 [-a] [-c] [-h]" >&2
		exit 1
	;;
	h)
		echo " * Making HD image"
		HDEMU=1
		;;
	c)
		echo " * Copying, not CVS"
		COPY=1
		;;
	q)
		echo " * Quick option (skip important bits"
		QUICK=1
		;;
	esac
done

if [ $QUICK = 0 ]
then USRMB=380
else USRMB=30
fi

USRBLOCKS="`expr $USRMB \* 1024 \* 1024 / $BS`"
USRSECTS="`expr $USRMB \* 1024 \* 2`"
ROOTKB=1400
ROOTSECTS="`expr $ROOTKB \* 2`"
ROOTBLOCKS="`expr $ROOTKB \* 1024 / $BS`"

if [ "$COPY" -ne 1 ]
then
	echo "Note: this script wants to do cvs operations, so it's necessary"
	echo "to have \$CVSROOT set and cvs login done."
	echo ""
fi

echo "Warning: I'm going to mkfs $RAM! It has to be at least $ROOTKB KB."
echo ""
echo "Temporary (sub)partition to use to make the /usr FS image? "
echo "I need $USRMB MB. It will be mkfsed!"
echo -n "Device: /dev/"
read dev || exit 1
TMPDISK=/dev/$dev

if [ -b $TMPDISK ]
then :
else	echo "$TMPDISK is not a block device.."
	exit 1
fi

echo "Temporary (sub)partition to use for /tmp? "
echo "It will be mkfsed!"
echo -n "Device: /dev/"
read dev || exit 1
TMPDISK2=/dev/$dev

if [ -b $TMPDISK2 ]
then :
else	echo "$TMPDISK2 is not a block device.."
	exit 1
fi

umount $TMPDISK
umount $TMPDISK2
umount $RAM

echo " * Cleanup old files"
rm -rf $RELEASEDIR $ISO $IMAGE $ROOTIMAGE $ISOGZ $CDFILES
mkdir -p $CDFILES || exit
mkdir -p $RELEASEDIR
echo " * Zeroing $RAM"
dd if=/dev/zero of=$RAM bs=$BS count=$ROOTBLOCKS
mkfs -B $BS -b $ROOTBLOCKS $RAM || exit
mkfs $TMPDISK2 || exit
echo " * mounting $RAM as $RELEASEDIR"
mount $RAM $RELEASEDIR || exit
mkdir -m 755 $RELEASEDIR/usr
mkdir -m 1777 $RELEASEDIR/tmp
mount $TMPDISK2 $RELEASEDIR/tmp

echo " * Zeroing $TMPDISK"
dd if=/dev/zero of=$TMPDISK bs=$BS count=$USRBLOCKS
mkfs -B $BS -b $USRBLOCKS $TMPDISK || exit
echo " * Mounting $TMPDISK as $RELEASEDIR/usr"
mount $TMPDISK $RELEASEDIR/usr || exit
mkdir -p $RELEASEDIR/tmp
mkdir -p $RELEASEDIR/usr/tmp

if [ $QUICK = 0 ]
then
	echo " * Transfering $COPYITEMS to $RELEASEDIR"
	( cd / && tar cf - $COPYITEMS ) | ( cd $RELEASEDIR && tar xf - ) || exit 1

	# Make sure compilers and libraries are bin-owned
	chown -R bin $RELEASEDIR/usr/lib

	if [ "$COPY" -ne 1 ]
	then
		echo " * Doing new cvs export"
		( cd $RELEASEDIR/usr && mkdir src && cvs export -rHEAD src )
	else
		( cd .. && make clean )
		srcdir=/usr/src
		( cd $srcdir && tar cf - . ) | ( cd $RELEASEDIR/usr && mkdir src && cd src && tar xf - )
	fi

	echo " * Fixups for owners and modes of dirs and files"
	chown -R bin $RELEASEDIR/usr/src
	find $RELEASEDIR/usr/src -type d | xargs chmod 755
	find $RELEASEDIR/usr/src -type f | xargs chmod 644
	find $RELEASEDIR/usr/src -name configure | xargs chmod 755
	find $RELEASEDIR/usr/src/commands -name build | xargs chmod 755
	# Bug tracking system not for on cd
	rm -rf $RELEASEDIR/usr/src/doc/bugs

	# Make sure the CD knows it's a CD
	date >$RELEASEDIR/CD
	echo " * Chroot build"
	chroot $RELEASEDIR "/bin/sh -x /usr/src/tools/chrootmake.sh" || exit 1
	echo " * Chroot build done"
	# The build process leaves some file in src as root.
	chown -R bin $RELEASEDIR/usr/src*
	cp issue.install $RELEASEDIR/etc/issue

	if [ "$HDEMU" -ne 0 ]; then hdemu_root_changes; fi

	echo "Temporary filesystems still mounted. Make changes, or press RETURN"
	echo -n "to continue making the image.."
	read xyzzy
fi

echo $version_pretty >$RELEASEDIR/etc/version
echo " * Counting files"
df $TMPDISK | tail -1 | awk '{ print $4 }' >$RELEASEDIR/.usrkb
du -s $RELEASEDIR/usr/src.* | awk '{ t += $1 } END { print t }' >$RELEASEDIR/.extrasrckb
( for d in $RELEASEDIR/usr/src.*; do find $d; done) | wc -l >$RELEASEDIR/.extrasrcfiles
find $RELEASEDIR/usr | wc -l >$RELEASEDIR/.usrfiles
find $RELEASEDIR -xdev | wc -l >$RELEASEDIR/.rootfiles
umount $TMPDISK || exit
umount $TMPDISK2 || exit
umount $RAM || exit
(cd ../boot && make)
(cd .. && make depend)
make image || exit 1
cp image image_big
make clean
make image_small || exit 1
dd if=$RAM of=$ROOTIMAGE bs=$BS count=$ROOTBLOCKS
# Prepare image and image_small for cdfdboot
cp image_big image
sh mkboot cdfdboot
cp $IMAGE $CDFILES/bootflop.img
cp release/cd/* $CDFILES

h_opt=
bootimage=$IMAGE
if [ "$HDEMU" -ne 0 ]; then
	make_hdimage
	h_opt='-h'
	bootimage=hdimage
fi
writeisofs -l MINIX -b $bootimage $h_opt $CDFILES $ISO || exit 1

if [ "$HDEMU" -eq 0 ]
then
	echo "Appending Minix root and usr filesystem"
	# Pad ISO out to cylinder boundary
	isobytes=`stat -size $ISO`
	isosects=`expr $isobytes / 512`
	isopad=`expr $secs - '(' $isosects % $secs ')'`
	dd if=/dev/zero count=$isopad >>$ISO
	# number of sectors
	isosects=`expr $isosects + $isopad`
	( cat $ISO $ROOTIMAGE ; dd if=$TMPDISK bs=$BS count=$USRBLOCKS ) >m
	mv m $ISO
	# Make CD partition table
	installboot -m $ISO /usr/mdec/masterboot
	# Make sure there is no hole..! Otherwise the ISO format is
	# unreadable.
	partition -m $ISO 0 81:$isosects 81:$ROOTSECTS 81:$USRSECTS
fi
echo " * gzipping $ISO"
gzip -9 $ISO
ls -al $ISOGZ