122 lines
2.3 KiB
Bash
Executable file
122 lines
2.3 KiB
Bash
Executable file
#!/bin/sh
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#
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# mkboot 2.0 - make boot floppy, make root device bootable, etc.
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# Author: Kees J. Bot
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usage() {
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echo "Usage: $0 [bootable | hdboot | fdboot [device]]" >&2
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exit 1
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}
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rotate_oldest() {
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base_dir="$1"
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set -- `ls -t "$base_dir"`
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case $# in
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0|1|2|3)
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# Not much there, do not remove a thing.
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;;
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*)
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# Remove the third-newest image in /boot/$hdboot_t, but
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# only if there's an older one (which is kept).
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echo "rm $root:$base_dir/$3"
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rm -rf "$base_dir/$3"
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esac
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}
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trap 'e=$?; rm -f /tmp/mkb.$$; exit $e' 0 2
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mdec=/usr/mdec # bootstraps
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# Check arguments.
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case "$#:$1" in
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1:bootable | 1:hdboot | [12]:fdboot )
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action=$1 dev=$2 size=$3
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;;
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*) usage
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esac
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# Get the device table.
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FSTAB=/etc/fstab
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touch $FSTAB
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if grep -q "Poor man" $FSTAB
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then . $FSTAB
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else root="`awk <$FSTAB '{ if($2=="/") { print $1 } }'`"
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fi
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# The real root device may be the RAM disk.
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realroot=`printroot -r`
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# If it's an initial fstab, pretend root is real root
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if [ "$root" = "/dev/ROOT" -o -z "$root" ]
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then root=$realroot
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fi
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case $action in
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bootable | hdboot)
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# We need the root device.
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if [ $realroot = $root ]
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then
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rootdir=
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else
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umount $root 2>/dev/null
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mount $root /mnt || exit
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rootdir=/mnt
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fi
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esac
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case $action in
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hdboot)
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sh tell_config OS_RELEASE . OS_VERSION >/tmp/mkb.$$
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version=`sed 's/[" ]//g;/^$/d' </tmp/mkb.$$`
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# Retrieve the git revision; this only succeeds
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# if git is available, it's a git checkout, *and*
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# there are no uncommitted changes.
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if git diff --quiet 2>/dev/null
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then gitrev="-`git describe --always`"
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fi
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revision=`cat revision 2>/dev/null`
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if [ -z "$revision" ]
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then rrevision=""
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gitrev=""
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else rrevision=r$revision
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fi
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oldrev=$revision
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if [ -z "$revision" ]
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then
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revision=0
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rrevision=""
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else
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revision=`expr $revision + 1`
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rrevision=r$revision
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fi
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target="${version}${rrevision}${gitrev}"
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rotate_oldest "$rootdir/boot/minix"
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# rotate system processes. We assume latest ones are in
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# /boot/modules/.temp and we maintain /boot/modules/ by ourselves.
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[ -d /boot/minix/.temp ] || exit 1
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rm -rf /boot/minix/"$target"/
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mv /boot/minix/.temp /boot/minix/"$target"
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rm -f /boot/minix_latest
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ln -s minix/"$target" /boot/minix_latest
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# Save the revision number.
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test "$revision" != "$oldrev" && echo $revision >revision
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test $realroot != $root && umount $root
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echo "Done."
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;;
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esac
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sync
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exit 0
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