#!/bin/sh

S=`dfConfig -rs serial`

if [ "$S" = "unset" ]; then
  if [ -z "$1" ]; then
    echo "setserial [serial number]"
    exit 1
  fi
  echo -n "$1" > /tmp/s
  dfConfig -w serial /tmp/s
else
  echo "Serial: \"$S\"."
fi