target/linux/ath79/generic/base-files/lib/functions/k2t.sh

   1 #
   2 # Copyright (C) 2018 Weijie Gao <hackpascal@gmail.com>
   3 #
   4 # Helper function to extract mac addresses from mtd part for Phicomm K2T
   5 #
   6
   7 . /lib/functions.sh
   8 . /lib/functions/system.sh
   9 . /usr/share/libubox/jshn.sh
  10
  11 k2t_config_load() {
  12         local mtd_blk=$(find_mtd_part config)
  13
  14         if [ -z "$mtd_blk" ]; then
  15                 echo "k2t_config_load: no mtd part named config" >&2
  16                 exit 1
  17         fi
  18
  19         local json_size=$(dd if=$mtd_blk bs=1 count=8 2>/dev/null)
  20
  21         json_size="0x$json_size"
  22         json_size=$((json_size))
  23
  24         if [ "$?" -ne 0 ]; then
  25                 echo "k2t_config_load: invalid json data size" >&2
  26                 exit 2
  27         fi
  28
  29         if [ "$json_size" -eq 0 ]; then
  30                 echo "k2t_config_load: empty json data" >&2
  31                 exit 3
  32         fi
  33
  34         local json_data=$(dd if=$mtd_blk bs=1 skip=8 count=$json_size 2>/dev/null)
  35
  36         json_load "$json_data"
  37 }
  38
  39 k2t_get_mac() {
  40         local old_ns
  41
  42         json_set_namespace "k2t" old_ns
  43
  44         if k2t_config_load; then
  45                 json_select "this_dev_info"
  46                 json_get_var val "$1"
  47                 json_select ..
  48         fi
  49
  50         json_set_namespace old_ns
  51
  52         echo $val
  53 }
  54