RaspberryPi Shutdown Script

rc.local

# Add following line to /etc/rc.local

python /home/pi/scripts/shutdown.py &

shutdown.py

#!/usr/bin/python

# Connect switch to Pin 5 and 6
import RPi.GPIO as GPIO
import time
import subprocess

GPIO.setmode(GPIO.BOARD)
GPIO.setup(5, GPIO.IN)

oldButtonState = True

while True:
    buttonState = GPIO.input(5)

    if buttonState != oldButtonState and buttonState == False:
        subprocess.call("shutdown -h now", shell=True,
          stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        oldButtonState = buttonState

    time.sleep(.5)