my_i3status

#!/bin/sh

output () {
  led_mask=`xset q | grep LED | cut -d: -f4`
  caps_lock=$(( led_mask & 1))
  num_lock=$(( led_mask & 2))
  scroll_lock=$(( led_mask & 4))

  declare -A output

  if [[ caps_lock -eq 1 ]]; then
    output[caps]="C"
  else
    output[caps]="-"
  fi

  if [[ num_lock -eq 2 ]]; then
    output[num]="N"
  else
    output[num]="-"
  fi

  if [[ scroll_lock -eq 4 ]]; then
    output[scroll]="S"
  else
    output[scroll]="-"
  fi

  echo -n "[{ \"full_text\": \"${output[@]}\" }"
}

i3status_first_output (){
  read line
  echo ", `echo $line | sed \"s/^\[//\"`"
}

i3status_output (){
  read line
  echo ", `echo $line | sed \"s/^,\[//\"`"
}

read_first_two_lines () {
  read line && echo $line && read line && echo $line
}

i3status | (read_first_two_lines && output && i3status_first_output && while :
do
  echo -n ", "
  output
  i3status_output || exit 1
done)

Esse aqui vai no /usr/local/bin mas eu fiz um symlink na vdd.