minix/tools/mkboot

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#!/bin/sh
#
# mkboot 2.0 - make boot floppy, make root device bootable, etc.
# Author: Kees J. Bot
trap 'e=$?; rm -f /tmp/mkb.$$; exit $e' 0 2
mdec=/usr/mdec # bootstraps
# Check arguments.
case "$#:$1" in
1:bootable | 1:hdboot | [12]:fdboot )
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action=$1 dev=$2 size=$3
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;;
*) echo "Usage: $0 [bootable | hdboot | fdboot [device]]" >&2
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exit 1
esac
# Get the device table.
. /etc/fstab
# The real root device may be the RAM disk.
realroot=`printroot -r`
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# If it's an initial fstab, pretend root is real root
if [ $root = "/dev/ROOT" ]
then root=$realroot
fi
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case $action in
bootable | hdboot)
# We need the root device.
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if [ $realroot = $root ]
then
rootdir=
else
umount $root 2>/dev/null
mount $root /mnt || exit
rootdir=/mnt
fi
esac
case $action in
bootable)
# Install the boot monitor on the root device and make it bootable.
install -cs -m 644 $mdec/boot $rootdir/boot/boot || exit
sync
installboot -device $root $mdec/bootblock /boot/boot || exit
test $realroot != $root && umount $root
;;
hdboot)
# Install a new image on the root device.
if [ ! -d $rootdir/boot/image ]
then
# /boot/image is not yet a directory! Fix it.
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su root -c \
"exec mv $rootdir/boot/image /M"
install -d $rootdir/boot/image
su root -c \
"exec mv $rootdir/M $rootdir/boot/image/`uname -r`.`uname -v`"
fi
sh tell_config OS_RELEASE . OS_VERSION >/tmp/mkb.$$
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version=`sed 's/[" ]//g;/^$/d' </tmp/mkb.$$`
revision=`cat revision 2>/dev/null`
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if [ -z "$revision" ]
then rrevision=""
else rrevision=r$revision
fi
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oldrev=$revision
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target="${version}r${revision}"
if [ -z "$revision" ]
then
revision=0
rrevision=""
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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 $revision + 1`
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rrevision=r$revision
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fi
target="${version}${rrevision}"
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set -- `ls -t $rootdir/boot/image`
case $# in
0|1|2|3)
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# 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"
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esac
# Install the new image.
echo "install image $root:/boot/image/$target"
install -o root -m 600 image $rootdir/boot/image/$target || exit
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# 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
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if mkfs -B 1024 -i 512 $dev
then :
else
echo "mkfs of $dev failed."
exit 1;
fi
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# Install /dev, /boot/boot and /boot/image.
mount $dev /mnt || exit
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mkdir -p /mnt/boot/image || exit
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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
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edparams $dev 'main(){delay 2000;boot}; save' || exit
echo "Test kernel installed on $dev"
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;;
esac
sync
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exit 0