#!/bin/sh

#

# mkboot 2.0 - 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:hdboot | [12]:fdboot )

action=$1 dev=$2 size=$3

;;

*) echo "Usage: $0 [bootable | hdboot | fdboot [device]]" >&2

exit 1

esac

# Get the device table.

. /etc/fstab

# The real root device may be the RAM disk.

realroot=`printroot -r`

# If it's an initial fstab, pretend root is real root

if [ $root = "/dev/ROOT" ]

then root=$realroot

fi

case $action in

bootable | hdboot)

# We need the root device.

if [ $realroot = $root ]

then

rootdir=

else

umount $root 2>/dev/null

mount $root /mnt || exit

rootdir=/mnt

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/boot || exit

sync

installboot -device $root $mdec/bootblock /boot/boot || exit

test $realroot != $root && umount $root

;;

hdboot)

# Install a new image on the root device.

if [ ! -d $rootdir/boot/image ]

then

# /boot/image is not yet a directory! Fix it.

su root -c \

"exec mv $rootdir/boot/image /M"

install -d $rootdir/boot/image

su root -c \

"exec mv $rootdir/M $rootdir/boot/image/`uname -r`.`uname -v`"

fi

sh tell_config OS_RELEASE . OS_VERSION >/tmp/mkb.$$

version=`sed 's/[" ]//g;/^$/d' </tmp/mkb.$$`

revision=`cat revision 2>/dev/null`

if [ -z "$revision" ]

then rrevision=""

else rrevision=r$revision

fi

oldrev=$revision

target="${version}r${revision}"

if [ -z "$revision" ]

then

revision=0

rrevision=""

elif [ -f $rootdir/boot/image/$target ]

then

if [ $rootdir/boot/image/$target -newer image ]

then

echo "$root:/boot/image/$target is up to date"

test $realroot != $root && umount $root

exit 0

fi

revision=`expr $revision + 1`

rrevision=r$revision

fi

target="${version}${rrevision}"

set -- `ls -t $rootdir/boot/image`

case $# in

0|1|2|3)

# Not much there, do not remove a thing.

;;

*)

# Remove the third-newest image in /boot/image, but

# only if there's an older one (which is kept).

echo "rm $root:/boot/image/$3"

rm -f "$rootdir/boot/image/$3"

esac

# Install the new image.

echo "install image $root:/boot/image/$target"

install -o root -m 600 image $rootdir/boot/image/$target || exit

# Save the revision number.

test "$revision" != "$oldrev" && echo $revision >revision

test $realroot != $root && umount $root

echo "Done."

;;

fdboot)

# fdboot: Make a boot floppy.

if [ -z "$dev" ]

then

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/$dev

esac

fi

# Make a file system.

umount $dev 2>/dev/null

if mkfs -B 1024 -i 512 $dev

then :

else

echo "mkfs of $dev failed."

exit 1;

fi

# Install /dev, /boot/boot and /boot/image.

mount $dev /mnt || exit

mkdir -p /mnt/boot/image || exit

cpdir /dev /mnt/dev || exit

cp -p $mdec/boot /mnt/boot/boot || exit

cp -p image /mnt/boot/image/ || exit

umount $dev || exit

# Make bootable and copy the boot parameters.

installboot -d $dev $mdec/bootblock /boot/boot || exit

pfile=fdbootparams

if [ -f $pfile ]

then echo "Using floppy boot parameters from file $pfile."

edparams $dev "`cat $pfile`" || exit

else echo "Copying floppy boot parameters from $root."

dd if=$root of=$dev skip=1 seek=1 count=1 conv=silent || exit

fi

edparams $dev 'main(){delay 2000;boot}; save' || exit

echo "Test kernel installed on $dev"

;;

esac

sync

exit 0