A bash script that keeps my Raspberry Pi wireless internet connection open

hackhappy

#!/bin/bash

# Script from hackhappy.org

while [ true ]
do
    sleep 20
    wget -q --spider http://www.google.com/
    if [ "$?" != 0 ]; then
        sudo ifdown wlan0 && sudo ifup wlan0
    fi
done

wifi

#! /bin/sh
# /etc/init.d/wifi

### BEGIN INIT INFO
# Provides:          wifi
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Simple script to start a program at boot
# Description:       A simple script from www.stuffaboutcode.com which will start / stop a program a boot / shutdown.
### END INIT INFO

# If you want a command to always run, put it here

# Carry out specific functions when asked to by the system
case "$1" in
  start)
    echo "Starting wifi connection"
    # run application you want to start
    /home/pi/scripts/hackhappy &
    ;;
  stop)
    echo "Stopping wifi connection"
    # kill application you want to stop
    killall hackhappy
    ;;
  *)
    echo "Usage: /home/pi/scripts/hackhappy {start|stop}"
    exit 1
    ;;
esac

exit 0