chromecast-ota

#!/bin/busybox sh

# ROM Name - Used in logcat output
ROMName="EurekaROM"

# Build version, revision and device serial hash, normally no need to change these
BuildVersion="$(getprop ro.build.version.incremental)"
BuildRevision="$(cat /system/etc/chromecast-ota.rev)"
SerialHash=`busybox sha1sum /factory/serial.txt | busybox awk '{ print $1 }'` # We only use your serial hash

#URL for the Update Server
URL="http://ota.team-eureka.com/ota/update.php?version=$BuildVersion.$BuildRevision&serial=$SerialHash"

# Prefixed log messages are easier to distinguish
pLog() {
		echo "$ROMName-OTA: $1"
}

##################################
# Now we start the actual script #
##################################

# Start infinite loop to imitate the google updater
while true
do
	pLog "Running $ROMName-OTA Updater!"

	# Are we allowed to run?
	if test -f "/usr/bin/EurekaSettings" ; then
		DISABLE_OTA="$(EurekaSettings get EurekaRom ota)"
	else
		if test -f "/system/etc/chromecast-ota.rev" ; then
			DISABLE_OTA="0"
		else
			DISABLE_OTA="1"
		fi
	fi
	
	# If force update file exists, we will force an update
	if [ -f /tmp/.chromecastOTAForce ]
	then
		pLog "Force update check file found, forcing check"
		DISABLE_OTA="1"
		rm /tmp/.chromecastOTAForce
	fi
	
	# Are OTA's Disabled?
	if [ $DISABLE_OTA -eq "0" ]
	then
		pLog "OTA updates disabled per user request, Terminating"
		
		# Create a empty loop so this script is never ran again.
		while true
		do
			sleep 72000
		done
		
		# Delete run file
		rm /tmp/.chromecastOTA
		
		# Somehow, if we break out, exit, do NOT go through the rest of the code
		continue
	fi
	
	# Are we already running?
	if [ -f /tmp/.chromecastOTA ]
	then
		pLog "Already Running, Terminating"
		exit 1
	fi
	
	# We are running, so the world must know
	touch /tmp/.chromecastOTA

	# Delete any existing OTA
	if [ -f /cache/eureka_image.zip ]
	then
		rm /cache/eureka_image.zip
	fi
	
	# Check if update is forced
	if [ -f /tmp/.ignoreStagedRollout ]
	then
		rm /tmp/.ignoreStagedRollout
		URLWithForce="${URL}&force=true"
	# Else is needed here. Otherwise update will always be forced.
	else
		URLWithForce=$URL
	fi

	# Check for the update
	pLog "Checking for Updates"
	Response="$(busybox wget -q $URLWithForce -O - )"

	# Error checking for update, due to server/web issues
	if [ $? -ne 0 ]
	then
		pLog "Error Checking for update, Connection Issues"
		pLog "Restarting Service in 5 Minutes"
	
		# Delete run file
		rm /tmp/.chromecastOTA
	
		sleep 300
		continue
		
	# Update is available, do something
	elif [ "$Response" != "NoUpdate" ]
	then
		pLog "Update Found! Downloading now!"
		busybox wget -q "$Response" -O /cache/eureka_image.zip
		if [ $? -ne 0 ];
		then
			pLog "Error Downloading, Restarting"
			
			# Delete the failed update if it exists
			if [ -f /cache/eureka_image.zip ]
			then
				rm /cache/eureka_image.zip
			fi
			
			# Delete run file
			rm /tmp/.chromecastOTA
			
			# Sleep a while
			pLog "Sleeping 20 hours"
			sleep 72000
			
			continue
		else
			#Download was good, now download MD5 and check
			pLog "Update Downloaded Successfully"
			pLog "Downloading and Verifiying MD5 Hash"
			
			MD5Hash="$Response.md5"
			busybox wget -q "$MD5Hash" -O /cache/eureka_image.zip.md5
			
			# Did MD5 Download Successfully?
			if [ $? -ne 0 ];
			then
				# Delete run file
				rm /tmp/.chromecastOTA
				
				pLog "Error Downloading MD5, Restarting"
				
				# Sleep a while
				pLog "Sleeping 20 hours"
				sleep 72000
				
				continue
			else
			
				# Check of MD5 is OK
				MD1=`busybox md5sum -c /cache/eureka_image.zip.md5 | busybox awk '{ print $2 }'`

				# Compare MD5's
				if [ "$MD1" != "OK" ]
				then
					# Bad MD5 Match
					pLog "Failed to verify, Deleting files and Restarting"
					
					# Delete the failed update if it exists
					rm /cache/eureka_image.zip /cache/eureka_image.zip.md5
					
					# Delete run file
					rm /tmp/.chromecastOTA
					
					# Sleep a while
					pLog "Sleeping 20 hours"
					sleep 72000
					
					continue
				else
					# All went good
					pLog "File Verified Successfully!"
					
					# Delete md5 file as no need to keep it
					rm /cache/eureka_image.zip.md5
					
					# Delete run file
					rm /tmp/.chromecastOTA
					
					# Dirty fix to prevent issue with cache dir
					rm -r /cache/flashcast-data/
					
					# we do this as a file needs to exist for content_shel ota update to work
					touch /cache/ota.zip
					
					pLog "Rebooting into Flashcast To Update..."
					curl -H "Content-Type: application/json" http://localhost:8008/setup/reboot -d '{"params":"ota"}' -X POST
				
					#Sleep for 5 minutes as the curl based reboot can take a minute to complete
					sleep 300
					
					#Sometimes the CURL does not work due to some strage google bug, so lets fix that, shall we?
					curl -H "Content-Type: application/json" http://localhost:8008/apps/Fling -d 'http://localhost/?page=sysupdate' -X POST
					sleep 6 # Give time for the message to show up
					reboot recovery
					sleep 300
				fi
			fi
		fi
	else
		pLog "No Update Required!"
	fi
	
	# Sleep a while
	pLog "Sleeping 20 hours"
	sleep 72000
	
	# Delete run file
	rm /tmp/.chromecastOTA

done