target/linux/x86/base-files/lib/upgrade/platform.sh

   1 platform_export_bootpart() {
   2         local cmdline uuid disk
   3
   4         if read cmdline < /proc/cmdline; then
   5                 case "$cmdline" in
   6                         *block2mtd=*)
   7                                 disk="${cmdline##*block2mtd=}"
   8                                 disk="${disk%%,*}"
   9                         ;;
  10                         *root=*)
  11                                 disk="${cmdline##*root=}"
  12                                 disk="${disk%% *}"
  13                         ;;
  14                 esac
  15
  16                 case "$disk" in
  17                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02)
  18                                 uuid="${disk#PARTUUID=}"
  19                                 uuid="${uuid%-02}"
  20                                 for disk in /dev/[hsv]d[a-z]; do
  21                                         set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
  22                                         if [ "$4$3$2$1" = "$uuid" ]; then
  23                                                 export BOOTPART="${disk}1"
  24                                                 return 0
  25                                         fi
  26                                 done
  27                         ;;
  28                         /dev/*)
  29                                 export BOOTPART="${disk%[0-9]}1"
  30                                 return 0
  31                         ;;
  32                 esac
  33         fi
  34
  35         return 1
  36 }
  37
  38 platform_check_image() {
  39         [ "$#" -gt 1 ] && return 1
  40
  41         case "$(get_magic_word "$1")" in
  42                 eb48|eb63) return 0;;
  43                 *)
  44                         echo "Invalid image type"
  45                         return 1
  46                 ;;
  47         esac
  48 }
  49
  50 platform_copy_config() {
  51         if [ -b "$BOOTPART" ]; then
  52                 mount -t ext4 -o rw,noatime "$BOOTPART" /mnt
  53                 cp -af "$CONF_TAR" /mnt/
  54                 umount /mnt
  55         fi
  56 }
  57
  58 platform_do_upgrade() {
  59         platform_export_bootpart
  60
  61         if [ -b "${BOOTPART%[0-9]}" ]; then
  62                 sync
  63                 get_image "$@" | dd of="${BOOTPART%[0-9]}" bs=4096 conv=fsync
  64                 sleep 1
  65         fi
  66 }