#!/bin/sh
#
# Load Daniel Becker's modified Trackpad Driver on recent PowerBooks and iBooks
# This is released under a BSD license.
# By J. P. Block <jpb@apesseekingknowledge.net>
# and Joe Stroller <stroller@bigfoot.com>

. /etc/rc.common

# http://www.macdevcenter.com/pub/a/mac/2003/10/21/startup.html says:
#   The StartupItems specification requires that the executable file
#   has the same name as the subdirectory that contains it and that the
#   executable is in the root level of subdirectory.
#
# But since Joe User might choose to run this script manually
# (for testing or otherwise), we can't rely on $PWD and have
# to define the /path/to/the.kext programatically

MYDIR="${0%/*}" 

if [ "$UID" != "0" ]
  then
  echo "Who are you, kid? Get r00t if you wanna me55 with kernel m0dulez!"
  exit 1
fi

# Check to make sure we have a patched driver to load, or bad things will
# happen when we unload the original driver and can't find the patched driver
# to replace it.

if [ ! -d "$MYDIR/AppleADBMouse.kext" ]; then
        ConsoleMessage "No patched AppleADBMouse.kext found."
        exit 0
fi

# We have to source Apple's /etc/rc.common in order to get the ConsoleMessage
# function, but it breaks the below:
#
#if [ -z "$1" ]
#then
#   echo "ERROR! This script requires a commandline argument, silly!"
#fi

# You don't have to be drunk to write Bash scripts on a Macintosh, but it helps!
#
ConsoleMessage ""
ConsoleMessage ' * If you see a message below saying "$1: unbound variable"'
ConsoleMessage " * It probably means $0 "
ConsoleMessage ' * has been called without a parameter (like "start" or "stop")'
ConsoleMessage " * "
ConsoleMessage " * If this message annoys you then please bitch to (IE file a"
ConsoleMessage " * bug report with) Apple, compaining that their /etc/rc.common"
ConsoleMessage " * functions break standard Bash syntax like: "
ConsoleMessage ' *   if [ -z "$1" ] ; then echo "missing parameter" ; fi '
ConsoleMessage ""

case "$1" in
        start)

                ConsoleMessage "Loading Two Finger Scrolling"
# make sure the permissions are correct on it before we load it
                chown -R root:wheel $MYDIR/AppleADBMouse.kext
               kextunload -b com.apple.driver.AppleADBMouse && kextload $MYDIR//AppleADBMouse.kext
        ;;
        stop)

                ConsoleMessage "Stopping Two Finger Scrolling"
                /usr/bin/logger "Stopping Two Finger Scrolling"
                kextunload $MYDIR/AppleADBMouse.kext && kextload /System/Library/Extensions/AppleADBMouse.kext
        ;;
        *)
                echo "Neither \"Start\" nor \"Stop\" are spelled \"$1\""
        ;;
esac

exit 0