target/linux/x86_64/base-files/lib/preinit/79_move_config

   1 #!/bin/sh
   2 # Copyright (C) 2012-2014 OpenWrt.org
   3
   4 move_config() {
   5         local cmdline uuid disk dev
   6
   7         if read cmdline < /proc/cmdline; then
   8                 case "$cmdline" in
   9                         *block2mtd=*)
  10                                 disk="${cmdline##*block2mtd=}"
  11                                 disk="${disk%%,*}"
  12                         ;;
  13                         *root=*)
  14                                 disk="${cmdline##*root=}"
  15                                 disk="${disk%% *}"
  16                         ;;
  17                 esac
  18
  19                 case "$disk" in
  20                         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)
  21                                 uuid="${cmdline#PARTUUID=}"
  22                                 uuid="${uuid%-02}"
  23                                 for disk in /dev/[hsv]d[a-z]; do
  24                                         set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
  25                                         if [ "$4$3$2$1" = "$uuid" ]; then
  26                                                 dev="${disk}1"
  27                                                 break
  28                                         fi
  29                                 done
  30                         ;;
  31                         /dev/*)
  32                                 dev="${disk%[0-9]}1"
  33                         ;;
  34                 esac
  35         fi
  36
  37         if [ -n "$dev" ]; then
  38                 mount -t ext4 -o rw,noatime "$dev" /mnt
  39                 mv -f /mnt/sysupgrade.tgz /
  40                 umount /mnt
  41         fi
  42 }
  43
  44 boot_hook_add preinit_mount_root move_config
  45