#!/bin/sh
#
#	mkboot - make boot floppy, make root device bootable, etc.
#							Author: Kees J. Bot

trap 'e=$?; rm -f /tmp/mkb.$$; exit $e' 0 2

mdec=/usr/mdec	# bootstraps

# Check arguments.
case "$#:$1" in
1:bootable | 1:hdinstall | 1:hdtest | 1:fdboot)
	action=$1
	;;
*)	echo "Usage: $0 [bootable | hdinstall | hdtest | fdboot]" >&2
	exit 1
esac

# Get the device table.
. /etc/fstab

# The real root device may be the RAM disk.
realroot=`printroot -r`

case $action in
bootable | hdinstall)
	# We need the root device.
	if [ $realroot = $root ]
	then
		rootdir=
	else
		umount $root 2>/dev/null
		mount $root /root || exit
		rootdir=/root
	fi
esac

case $action in
bootable)
	# Install the boot monitor on the root device and make it bootable.
	install -cs -m 644 $mdec/boot $rootdir/boot || exit
	sync
	su root -c "exec installboot -device $root $mdec/bootblock /boot" \
		|| exit
	;;
hdinstall)
	# Install a new image on the root device.
	if [ -d $rootdir/minix ]
	then
		# /minix is a directory containing images.
		target=minix/`uname -r`.`uname -v`
	else
		# /minix is the image.
		target=minix
	fi
	if [ $rootdir/$target -newer image ]
	then
		echo "$root:/$target is up to date"
	else
		ps -U ../kernel/kernel ../mm/mm ../fs/fs >/dev/null || exit
		if [ $realroot != $root ]
		then
			install -c /etc/psdatabase $rootdir/etc/psdatabase
		fi
		install -c image $rootdir/$target || exit
		echo "New $root:/$target installed."
	fi
	;;
hdtest)
	# Turn the hard disk scratch device into a boot disk for testing.
	su root -c \
	  "exec installboot -boot $tmp $mdec/bootblock $mdec/boot image" || exit

	# Copy the boot parameters.
	su root -c "exec edparams $root set" >/tmp/mkb.$$ || exit
	echo "unset delay; main(){boot}; save" >>/tmp/mkb.$$
	su root -c "exec edparams $tmp" </tmp/mkb.$$ || exit
	;;
fdboot)
	# Make a boot floppy.
	echo -n \
"Finish the name of the floppy device to write (by default 'fd0'): /dev/";
	read dev
	case "$dev" in
	'')	dev=/dev/fd0
		;;
	*)	dev=/dev/$dev
	esac
	installboot -boot $dev $mdec/bootblock $mdec/boot image || exit

	# Copy the boot parameters.
	su root -c "exec edparams $root set" >/tmp/mkb.$$ || exit
	echo "unset delay; save" >>/tmp/mkb.$$
	su root -c "exec edparams $dev" </tmp/mkb.$$ || exit
esac

case $action in
bootable | hdinstall)
	# Unmount the root device.
	if [ $realroot != $root ]
	then
		umount $root
	fi
esac
: exit 0