contrib/package/sysupgrade-atheros/files/lib/upgrade/platform.sh

   1 platform_check_image() {
   2         [ "$ARGC" -gt 1 ] && return 1
   3
   4         case "$(get_magic_word "$1")" in
   5                 # Freifunk .img files
   6                 4646)
   7                         local kern_name=$(dd if="$1" bs=2 skip=5 count=8 2>/dev/null); kern_name="${kern_name%% *}"
   8                         local root_name=$(dd if="$1" bs=2 skip=17 count=8 2>/dev/null); root_name="${root_name%% *}"
   9
  10                         if grep -q '"'$kern_name'"' /proc/mtd && grep -q '"'$root_name'"' /proc/mtd; then
  11                                 return 0
  12                         else
  13                                 echo "Invalid image. Missing the '$kern_name' or '$root_name' partition"
  14                                 return 1
  15                         fi
  16                 ;;
  17                 *)
  18                         echo "Invalid image. Use combined .img files on this platform"
  19                         return 1
  20                 ;;
  21         esac
  22 }
  23
  24 platform_do_upgrade() {
  25         local kern_length=$((0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)/65536))
  26         local kern_name=$(dd if="$1" bs=2 skip=5 count=8 2>/dev/null); kern_name="${kern_name%% *}"
  27         local root_length=$((0x$(dd if="$1" bs=2 skip=13 count=4 2>/dev/null)/65536))
  28         local root_name=$(dd if="$1" bs=2 skip=17 count=8 2>/dev/null); root_name="${root_name%% *}"
  29
  30         if grep -q '"'$kern_name'"' /proc/mtd && grep -q '"'$root_name'"' /proc/mtd; then
  31                 local append=""
  32                 [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
  33
  34                 if [ -n "$kern_name" -a -n "$root_name" ] && \
  35                    [ ${kern_length:-0} -gt 0 -a ${root_length:-0} -gt ${kern_length:-0} ];
  36                 then
  37                         dd if="$1" bs=65536 skip=1 count=$kern_length 2>/dev/null | \
  38                                 mtd -e $kern_name write - $kern_name
  39
  40                         dd if="$1" bs=65536 skip=$((1+$kern_length)) count=$root_length 2>/dev/null | \
  41                                 mtd -e $root_name $append write - $root_name
  42                 fi
  43         fi
  44 }