# Prints the WAN IP address. The result is cached and updated according to $update_period.


run_segment() {
	local tmp_file="${TMUX_POWERLINE_DIR_TEMPORARY}/wan_ip.txt"
	local wan_ip

	if [ -f "$tmp_file" ]; then
  	  if shell_is_osx || shell_is_bsd; then
    	last_update=$(stat -f "%m" ${tmp_file})
  	  elif shell_is_linux; then
    	last_update=$(stat -c "%Y" ${tmp_file})
  	  fi

  	  time_now=$(date +%s)
  	  update_period=900
  	  up_to_date=$(echo "(${time_now}-${last_update}) < ${update_period}" | bc)

  	  if [ "$up_to_date" -eq 1 ]; then
    	wan_ip=$(cat ${tmp_file})
  	  fi
	fi

	if [ -z "$wan_ip" ]; then
  	  wan_ip=$(curl --max-time 2 -s http://whatismyip.akamai.com/)

  	  if [ "$?" -eq "0" ]; then
    	echo "${wan_ip}" > $tmp_file
  	  elif [ -f "${tmp_file}" ]; then
    	wan_ip=$(cat "$tmp_file")
  	  fi
	fi

	if [ -n "$wan_ip" ]; then
  	  echo "ⓦ ${wan_ip}"
	fi

	return 0
}

# Prints the WAN IP address. The result is cached and updated according to $update_period.


run_segment() {
    local tmp_file="${TMUX_POWERLINE_DIR_TEMPORARY}/wan_ip.txt"
    local wan_ip

    if [ -f "$tmp_file" ]; then
      if shell_is_osx || shell_is_bsd; then
        stat >/dev/null 2>&1 && is_gnu_stat=false || is_gnu_stat=true
        if [ "$is_gnu_stat" == "true" ];then
            last_update=$(stat -c "%Y" ${tmp_file})
        else
            last_update=$(stat -f "%m" ${tmp_file})
        fi
      elif shell_is_linux || [ -z $is_gnu_stat]; then
        last_update=$(stat -c "%Y" ${tmp_file})
      fi

      time_now=$(date +%s)
      update_period=900
      up_to_date=$(echo "(${time_now}-${last_update}) < ${update_period}" | bc)

      if [ "$up_to_date" -eq 1 ]; then
        wan_ip=$(cat ${tmp_file})
      fi
    fi

    if [ -z "$wan_ip" ]; then
      wan_ip=$(curl --max-time 2 -s http://whatismyip.akamai.com/)

      if [ "$?" -eq "0" ]; then
        echo "${wan_ip}" > $tmp_file
      elif [ -f "${tmp_file}" ]; then
        wan_ip=$(cat "$tmp_file")
      fi
    fi

    if [ -n "$wan_ip" ]; then
      echo "ⓦ ${wan_ip}"
    fi

    return 0
}

Replace \t for the space, Add osx under the gnu stat command support
Replace \t for the space, Add osx under the gnu stat command support
