target/linux/mvebu/base-files/lib/upgrade/sdcard.sh

   1 get_magic_at() {
   2         local file="$1"
   3         local pos="$2"
   4         get_image "$file" | dd bs=1 count=2 skip="$pos" 2>/dev/null | hexdump -v -n 2 -e '1/1 "%02x"'
   5 }
   6
   7 platform_check_image_sdcard() {
   8         local file="$1"
   9         local magic
  10
  11         magic=$(get_magic_at "$file" 510)
  12         [ "$magic" != "55aa" ] && {
  13                 echo "Failed to verify MBR boot signature."
  14                 return 1
  15         }
  16
  17         return 0;
  18 }
  19
  20 platform_do_upgrade_sdcard() {
  21         sync
  22         get_image "$1" | dd of=/dev/mmcblk0 bs=2M conv=fsync
  23         sleep 1
  24 }
  25
  26 platform_copy_config_sdcard() {
  27         mkdir -p /boot
  28         [ -f /boot/kernel.img ] || mount -o rw,noatime /dev/mmcblk0p1 /boot
  29         cp -af "$CONF_TAR" /boot/
  30         sync
  31         umount /boot
  32 }