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 if grep -q "Poor man" $FSTAB
  47 then    . $FSTAB
  48 else    root="`awk <$FSTAB '{ if($2=="/") { print $1 } }'`"
  49 fi
  50
  51 # The real root device may be the RAM disk.
  52 realroot=`printroot -r`
  53
  54 # If it's an initial fstab, pretend root is real root
  55 if [ "$root" = "/dev/ROOT" -o -z "$root" ]
  56 then    root=$realroot
  57 fi
  58
  59 case $action in
  60 bootable | hdboot)
  61         # We need the root device.
  62
  63         if [ $realroot = $root ]
  64         then
  65                 rootdir=
  66         else
  67                 umount $root 2>/dev/null
  68                 mount $root /mnt || exit
  69                 rootdir=/mnt
  70         fi
  71 esac
  72
  73 case $action in
  74 hdboot)
  75         version=`sh ../sys/conf/osrelease.sh`
  76
  77         # Retrieve the git revision; this only succeeds
  78         # if git is available, it's a git checkout, *and*
  79         # there are no uncommitted changes.
  80         if git diff --quiet 2>/dev/null
  81         then    gitrev="-`git describe --always`"
  82         fi
  83
  84         revision=`cat revision 2>/dev/null`
  85
  86         oldrev=$revision
  87
  88         if [ -z "$revision" ]
  89         then
  90                 revision=0
  91                 rrevision=""
  92                 gitrev=""
  93         else
  94                 revision=`expr $revision + 1`
  95                 rrevision=r$revision
  96         fi
  97
  98         target="${version}${rrevision}${gitrev}"
  99
 100         rotate_oldest "$DESTDIR/boot/minix"
 101
 102         # rotate system processes. We assume latest ones are in
 103         # /boot/modules/.temp and we maintain /boot/modules/ by ourselves.
 104         [ -d $DESTDIR/boot/minix/.temp ] || exit 1
 105         rm -rf $DESTDIR/boot/minix/"$target"/
 106         mv $DESTDIR/boot/minix/.temp $DESTDIR/boot/minix/"$target"
 107         rm -f $DESTDIR/boot/minix_latest
 108         ln -s minix/"$target" $DESTDIR/boot/minix_latest
 109
 110         # Save the revision number.
 111         test "$revision" != "$oldrev" && echo $revision >revision
 112
 113         test $realroot != $root && umount $root
 114         echo "Done."
 115         ;;
 116 esac
 117 sync
 118 exit 0