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 "$1")" in
   5                 # Freifunk .img files
   6                 4646) return 0;;
   7                 *)
   8                         echo "Invalid image. Use Freifunk .img files on this platform"
   9                         return 1
  10                 ;;
  11         esac
  12 }
  13
  14 platform_do_upgrade() {
  15         local kern_length=$((0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)/65536))
  16         local kern_name=$(dd if="$1" bs=2 skip=5 count=8 2>/dev/null); kern_name="${kern_name%% *}"
  17         local root_length=$((0x$(dd if="$1" bs=2 skip=13 count=4 2>/dev/null)/65536))
  18         local root_name=$(dd if="$1" bs=2 skip=17 count=8 2>/dev/null); root_name="${root_name%% *}"
  19
  20         local append=""
  21         [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
  22
  23         if [ -n "$kern_name" -a -n "$root_name" ] && \
  24            [ ${kern_length:-0} -gt 0 -a ${root_length:-0} -gt ${kern_length:-0} ];
  25         then
  26                 dd if="$1" bs=65536 skip=1 count=$kern_length 2>/dev/null | \
  27                         mtd -e $kern_name write - $kern_name
  28
  29                 dd if="$1" bs=65536 skip=$((1+$kern_length)) count=$root_length 2>/dev/null | \
  30                         mtd -e $root_name $append write - $root_name
  31         fi
  32 }