spindle.queued.net Git - xodist/blob - installer

   1 #!/bin/sh -e
   2
   3 PREREQS=""
   4
   5 prereqs()
   6 {
   7         echo "$PREREQS"
   8 }
   9
  10 case "$1" in
  11         prereqs)
  12                 prereqs
  13                 exit 0
  14         ;;
  15 esac
  16
  17 # find the disk to install to
  18 find_target()
  19 {
  20         SRC=$1
  21
  22         for f in /sys/block/[sh]d[a-z]; do
  23                 bdev=$(basename $f)
  24                 if [ "$bdev" = "$SRC" ]; then
  25                         continue
  26                 fi
  27                 # the first block device that's not root?  take it!
  28                 echo "$bdev"
  29                 break
  30         done
  31 }
  32
  33 do_install()
  34 {
  35         echo
  36         echo
  37         echo
  38         echo "Starting installer!"
  39         if [ ! -d /root/etc ]; then
  40                 echo "Error: /root doesn't appear to have a valid filesystem mounted!"
  41                 sleep 9999999999
  42         fi
  43
  44         ROOT_SRC=$(grep ' /root ' /proc/mounts | cut -d' ' -f1)
  45         ROOT_SRC=$(readlink -f $ROOT_SRC | sed 's/.*\/\([hs]d[a-z]\)[0-9]\+$/\1/')
  46
  47         TARGET=$(find_target "$ROOT_SRC")
  48
  49         if [ -z "$TARGET" ]; then
  50                 echo "Error: couldn't find drive to install to!"
  51                 sleep 9999999999
  52         fi
  53
  54         # don't keep fs mounted while copying it
  55         umount /root
  56
  57         # wait 15s for user realize that they've made a mistake
  58         echo "Copying data from [$ROOT_SRC]  =>  [$TARGET]"
  59         echo "IF THIS IS INCORRECT, REBOOT NOW OR YOU WILL LOSE DATA!  (waiting 15s)"
  60         sleep 15
  61
  62         echo "Too late, starting copy..."
  63         # ideally, we'll resize the filesystem/partitions later..
  64         dd if=/dev/$ROOT_SRC of=/dev/$TARGET bs=4k
  65
  66         echo "Done.  Remove installer media."
  67         while [ -d /sys/block/$ROOT_SRC ]; do
  68                 sleep 1
  69         done
  70         reboot
  71 }
  72
  73 for x in $(cat /proc/cmdline); do
  74         case $x in
  75         installer)
  76                 do_install
  77                 ;;
  78         esac
  79 done
  80