target/share/livecd/init

   1 #!/bin/sh
   2 # --- T2-COPYRIGHT-NOTE-BEGIN ---
   3 # This copyright note is auto-generated by scripts/Create-CopyPatch.
   4 #
   5 # T2 SDE: target/share/livecd/init
   6 # Copyright (C) 2020 The T2 SDE Project
   7 #
   8 # More information can be found in the files COPYING and README.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; version 2 of the License. A copy of the
  13 # GNU General Public License can be found in the file COPYING.
  14 # --- T2-COPYRIGHT-NOTE-END ---
  15
  16
  17 live="live=live.squash `cat /proc/cmdline`" ; live=${live##*live=} ; live=${live%% *}
  18 echo "Searching for media with $live image ..."
  19 mkdir -p /{media,mnt}/live
  20 i=0
  21 while [ $i -le 14 ]; do
  22   for x in /sys/block/*/device; do
  23     x=${x%/device}; x=${x#/sys/block/}
  24     [ "$x" = "*" ] && continue
  25     # TODO: make option to skip fixed devices
  26     #case "`ls -l /sys/block/$x/device`" in
  27     #  */usb*|*/ieee1394) : ;;
  28     #  *) [ "`cat /sys/block/$x/removable`" = 1 ] || continue ;;
  29     #esac
  30     x=/dev/$x
  31     for x in ${x}* ; do
  32       [ -e $x ] || continue
  33       fs=`disktype $x 2>/dev/null |
  34           sed -e '/file system/!d' -e 's/file system.*//' -e 's/ //g' \
  35               -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/' \
  36               -e 's/fat.*/vfat/' | sed -n '$p'`
  37       [ $i -gt 2 ] && echo "Testing device $x, type $fs ..."
  38       if mount -t $fs -o ro $x /media/live 2>/dev/null; then
  39         [ $i -gt 0 ] && echo "Successfully mounted $x ..."
  40         if [ -f /media/live/$live ]; then
  41           echo "Found the $live image on $x."
  42
  43           if losetup /dev/loop0 /media/live/$live &&
  44              mount -t squashfs -o ro /dev/loop0 /mnt/live
  45           then
  46             kill %1
  47
  48             # setup final directory structure
  49             mkdir -p /tmp/bin
  50             mv /lib /tmp/
  51             mv /bin/* /sbin/* /tmp/bin/
  52             for x in /mnt/live/* ; do
  53                 x=${x#/mnt/live/}
  54                 case $x in
  55                   dev|proc|sys|media|mnt|tmp) continue ;;
  56                 esac
  57                 if [ -e /$x ]; then
  58 #                       echo "Removing /$x ..."
  59                         /tmp/bin/rm -rf /$x
  60                 fi
  61 #               echo "Sym-linking /mnt/live/$x /$x"
  62                 /tmp/bin/ln -s /mnt/live/$x /$x
  63             done
  64
  65 #           /tmp/bin/ls -l / /tmp
  66 #           /tmp/bin/rm -rf /tmp/bin
  67
  68             exec /init2 $*
  69           else
  70             echo "Failed to loop-mount $live."
  71             losetup -d /dev/loop0
  72           fi
  73         else
  74           echo "No $live image found."
  75         fi
  76         umount /media/live
  77       fi
  78     done
  79   done
  80   : $(( i++ ))
  81   sleep 1
  82 done
  83
  84 echo "No live media found, giving up. Debug shell:"
  85 exec /bin/sh