releasetools/mkboot

   1 #!/bin/sh
   2 #
   3 #       mkboot 2.0 - make root device bootable, etc.
   4 #                                                       Author: Kees J. Bot
   5
   6 usage() {
   7         echo "Usage: $0 [bootable | hdboot] [DESTDIR]" >&2
   8         exit 1
   9 }
  10
  11 rotate_oldest() {
  12         base_dir="$1"
  13         set -- `ls -t "$base_dir"`
  14
  15         case $# in
  16         0|1|2|3)
  17                 # Not much there, do not remove a thing.
  18                 ;;
  19         *)
  20                 # Remove the third-newest image in /boot/$hdboot_t, but
  21                 # only if there's an older one (which is kept).
  22                 echo "rm $root:$base_dir/$3"
  23                 rm -rf "$base_dir/$3"
  24         esac
  25 }
  26
  27
  28 mdec=/usr/mdec  # bootstraps
  29 # If no DESTDIR specified, then act on / or on the current chroot
  30 DESTDIR=
  31 # Check arguments.
  32 case "$#:$1" in
  33 1:bootable | 1:hdboot )
  34         # LSC Broken, if $# == 1, then $2,$3 are not set...
  35         action=$1
  36         ;;
  37 2:bootable | 2:hdboot )
  38         action=$1 DESTDIR=$2
  39         ;;
  40 *)      usage
  41 esac
  42
  43 # Get the device table.
  44 FSTAB=/etc/fstab
  45 touch $FSTAB
  46 root="`awk <$FSTAB '{ if($2=="/") { print $1 } }'`"
  47
  48 # The real root device may be the RAM disk.
  49 realroot=`printroot -r`
  50
  51 # If it's an initial fstab, pretend root is real root
  52 if [ "$root" = "/dev/ROOT" -o -z "$root" ]
  53 then    root=$realroot
  54 fi
  55
  56 case $action in
  57 bootable | hdboot)
  58         # We need the root device.
  59
  60         if [ $realroot = $root ]
  61         then
  62                 rootdir=
  63         else
  64                 umount $root 2>/dev/null
  65                 mount $root /mnt || exit
  66                 rootdir=/mnt
  67         fi
  68 esac
  69
  70 case $action in
  71 hdboot)
  72         version=`sh ../sys/conf/osrelease.sh`
  73
  74         # Retrieve the git revision; this only succeeds
  75         # if git is available, it's a git checkout, *and*
  76         # there are no uncommitted changes.
  77         if git diff --quiet 2>/dev/null
  78         then    gitrev="-`git describe --always`"
  79         fi
  80
  81         revision=`cat revision 2>/dev/null`
  82
  83         oldrev=$revision
  84
  85         if [ -z "$revision" ]
  86         then
  87                 revision=0
  88                 rrevision=""
  89                 gitrev=""
  90         else
  91                 revision=`expr $revision + 1`
  92                 rrevision=r$revision
  93         fi
  94
  95         target="${version}${rrevision}${gitrev}"
  96
  97         rotate_oldest "$DESTDIR/boot/minix"
  98
  99         # rotate system processes. We assume latest ones are in
 100         # /boot/modules/.temp and we maintain /boot/modules/ by ourselves.
 101         [ -d $DESTDIR/boot/minix/.temp ] || exit 1
 102         rm -rf $DESTDIR/boot/minix/"$target"/
 103         mv $DESTDIR/boot/minix/.temp $DESTDIR/boot/minix/"$target"
 104         rm -f $DESTDIR/boot/minix_latest
 105         ln -s minix/"$target" $DESTDIR/boot/minix_latest
 106
 107         # Save the revision number.
 108         test "$revision" != "$oldrev" && echo $revision >revision
 109
 110         test $realroot != $root && umount $root
 111         echo "Done."
 112         ;;
 113 esac
 114 sync
 115 exit 0