AirPort-rc.local.sh

#!/bin/sh
# Save this to /mnt/Flash/AirPort-rc.local.sh
# This file first mounts /dev/dk0 in /Volumes/dk0, then executes /Volumes/dk0/AirPort-startup.sh

FLASH="/mnt/Flash"
DEVICE="/dev/dk0"
MOUNT="/Volumes/dk0"
SCRIPT="/AirPort-startup.sh"
KEY_FILE="/AirPort-hash.key"
LOG="/AirPort-rc.local.sh.log"
DEBUG_INFO="/AirPort-rc.local.sh.debug.log"

echo "[`date`] Running AirPort-rc.local.sh" >> $LOG
echo "[`date`] Running AirPort-rc.local.sh" >> $DEBUG_INFO

# ... we might have to mount the disk first
# We don't actually have any way of checking that though
# Try checking if files diskd creates on mount exist
if test ! -e $MOUNT/Shared/.com.apple.airport.sharepoint -a -e $DEVICE
then
	echo "[`date`] $DEVICE exists and is not mounted" >> $LOG
	AUTO_UNMOUNT=true
	mkdir -p $MOUNT
	mount $DEVICE $MOUNT
else
	echo "[`date`] $DEVICE does not exist or is already mounted" >> $LOG
	AUTO_UNMOUNT=false
fi

if [ -x $MOUNT$SCRIPT ]
then
	echo "[`date`] $MOUNT$SCRIPT exists and is executable" >> $LOG
	
	# The SHA512 hash of /Volumes/dk0/AirPort-hash.key must match the contents of /mnt/Flash/AirPort-hash.key
	RUN=false
	if [ -f /mnt/Flash$KEY_FILE ]
	then
		echo "[`date`] $FLASH$KEY_FILE exists" >> $LOG
		
		if [ -f $MOUNT$KEY_FILE ]
		then
			echo "[`date`] Checking hash of $MOUNT$KEY_FILE" >> $LOG
			KEY_HASH=`openssl dgst -r -sha512 $MOUNT$KEY_FILE | sed -E -e "s/^.*([a-zA-Z0-9]{128}).*\$/\1/g"`
			echo "[`date`] Hash of $MOUNT$KEY_FILE is $KEY_HASH" >> $LOG
			
			if [ "$KEY_HASH" = "`cat $FLASH$KEY_FILE`" ]
			then
				echo "[`date`] Hash on $FLASH and $MOUNT match!" >> $LOG
				RUN=true
			else
				echo "[`date`] !!! Hash on $FLASH and $MOUNT DO NOT match !!!" >> $LOG
			fi
		else
			echo "[`date`] Hash file exists on $FLASH, but not on $MOUNT" >> $LOG
		fi
	else
		echo "[`date`] !!! /mnt/Flash$KEY_FILE does not exist !!!" >> $LOG
		echo "[`date`] Skipping verification" >> $LOG
		RUN=true
	fi
	
	if [ $RUN = true ]
	then
		echo "[`date`] Running $MOUNT$SCRIPT..." >> $LOG
		cd $MOUNT
		$MOUNT$SCRIPT >> $LOG 2>&1
		echo "[`date`] Done!" >> $LOG
	else
		echo "[`date`] Verification failed" >> $LOG
	fi
fi

# Unmount the disk - before diskd tries to mount it again
# AirPort-startup.sh should copy any files it needs to somewhere in the main partition
if [ $AUTO_UNMOUNT = true ]
then
	cd /
	
	echo "[`date`] Printing ps -A to $DEBUG_INFO..." >> $LOG
	printf "\n[`date`] Printing ps -A to debug info...\n" >> $DEBUG_INFO
	ps -A >> $DEBUG_INFO
	
	# Kill diskd (and later restart it) incase the disk being mouted has already stopped diskd from working
	echo "[`date`] Killing diskd..." >> $LOG
	pkill -KILL diskd >> $LOG 2>&1
	
	echo "[`date`] Unmounting $DEVICE" >> $LOG
	# Forcibly unmount - diskd really doesn't like this to be here on startup
	umount -f $DEVICE >> $LOG 2>&1
	
	# Seems to work...
	echo "[`date`] Killing diskd..." >> $LOG
	pkill -KILL diskd >> $LOG 2>&1
	
	sleep 5
	
	# Restart diskd
	echo "[`date`] Starting diskd..." >> $LOG
	/sbin/diskd -i  -d > /var/log/diskd.log 2>&1 &
	
	echo "[`date`] Printing ps -A to $DEBUG_INFO..." >> $LOG
	printf "\n[`date`] Printing ps -A to debug info...\n" >> $DEBUG_INFO
	ps -A >> $DEBUG_INFO
fi

echo "[`date`] Done!" >> $LOG

exit 0