Commodore C64 on RPi - part 4 (autostart and power button)

Hardware:
Connect momentary button to gnd and GPIO 3

Software:
$ mkdir /home/pi/C64-games

$ sudo nano /etc/init.d/c64init.sh

#!/bin/sh

### BEGIN INIT INFO
# Provides:          myservice
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Put a short description of the service here
# Description:       Put a long description of the service here
### END INIT INFO

# Change the next 3 lines to suit where you install your script and what you want to call it
DIR=/usr/local/bin
DAEMON=$DIR/x64
DAEMON_NAME=C64

# Add any command line options for your daemon here
DAEMON_OPTS="-chdir /home/pi/C64-games"

# This next line determines what user the script runs as.
# Root generally not recommended but necessary if you are using the Raspberry Pi GPIO from Python.
DAEMON_USER=root

# The process ID of the script when it runs is stored here:
PIDFILE=/var/run/$DAEMON_NAME.pid

. /lib/lsb/init-functions

do_start () {
    log_daemon_msg "Starting system $DAEMON_NAME daemon"
    sleep 12
    start-stop-daemon --start --background --pidfile $PIDFILE --make-pidfile --user $DAEMON_USER --chuid $DAEMON_USER --startas $DAEMON -- $DAEMON_OPTS
    log_end_msg $?
}
do_stop () {
    log_daemon_msg "Stopping system $DAEMON_NAME daemon"
    start-stop-daemon --stop --pidfile $PIDFILE --retry 10
    log_end_msg $?
}

case "$1" in

    start|stop)
        do_${1}
        ;;

    restart|reload|force-reload)
        do_stop
        do_start
        ;;

    status)
        status_of_proc "$DAEMON_NAME" "$DAEMON" && exit 0 || exit $?
        ;;
    *)
        echo "Usage: /etc/init.d/$DAEMON_NAME {start|stop|restart|status}"
        exit 1
        ;;

esac
exit 0

$ sudo chmod 755 /etc/init.d/c64init.sh
$ sudo update-rc.d c64init.sh defaults

$ mkdir Scripts
$ cd Scripts
$ touch shutdown_pi.py
$ nano shutdown_pi.py

#!/bin/python
# Simple script for shutting down the raspberry Pi at the press of a button.
# by Inderpreet Singh

import RPi.GPIO as GPIO
import time
import os

# Use the Broadcom SOC Pin numbers
# Setup the Pin with Internal pullups enabled and PIN in reading mode.
GPIO.setmode(GPIO.BCM)
GPIO.setup(3, GPIO.IN, pull_up_down = GPIO.PUD_UP)

# Our function on what to do when the button is pressed
def Shutdown(channel):
     os.system("sudo /etc/init.d/c64init.sh stop")
     os.system("sudo shutdown -h now")

# Add our function to execute when the button pressed event happens
GPIO.add_event_detect(3, GPIO.FALLING, callback = Shutdown, bouncetime = 2000)

# Now wait!
while 1:
     time.sleep(1)

$ sudo nano /etc/rc.local

sudo python /home/pi/Scripts/shutdown_pi.py &

The "&" at the end of the command tells it to run the process in the background. If you omit it, then your login prompt probably will not appear.

to be continued ...