#!/bin/bash

# Simple utility script for turning the LEDs on and off.
# Spares the user having to flip the GPIO lines constantly.
#
# Version 1.0.0

if [ ! "$UID" -eq 0 ] ; then
        echo "LEDs must be controlled as root or sudo."
        exit -1
fi

if [ "$#" -eq 0 ] ; then
	echo "Usage:  led-a [red | green | amber | off]"
	exit 1
elif [ "$1" == "red" ] ; then
	echo 1 > /sys/class/gpio/gpio40/value
	echo 0 > /sys/class/gpio/gpio41/value
elif [ "$1" == "green" ] ; then
	echo 1 > /sys/class/gpio/gpio41/value
	echo 0 > /sys/class/gpio/gpio40/value
elif [ "$1" == "amber" ] ; then
	echo 1 > /sys/class/gpio/gpio40/value
	echo 1 > /sys/class/gpio/gpio41/value
elif [ "$1" == "off" ] ; then
	echo 0 > /sys/class/gpio/gpio40/value
	echo 0 > /sys/class/gpio/gpio41/value
fi

exit 0
