#!/system/bin/sh

FAIL_CODE=32767

function do_test() {

	# parameters: sizeK vfat_arg id

	UUT=/tmp/$$.disk
	MPT=/tmp/$$
	DEV=/dev/block/loop7

	step=0
	rc=0

	while true; do

		step=1
		echo "Creating disk of size $1..." 		| tee -a $LOG
		dd if=/dev/zero of=$UUT bs=1024 count=$1 	>> $LOG
		rc=$?
		if [ $rc -ne 0 ]; then
			echo "Problems with dd"			| tee -a $LOG
			break
		fi

		step=2
		echo "Setting up loop device $DEV"
		losetup $DEV $UUT 				>> $LOG
		rc=$?
		if [ $rc -ne 0 ]; then
			echo "Problems setting up loop device"	| tee -a $LOG
			break
		fi

		step=3
		echo "Running mkfs.vfat..." 			| tee -a $LOG
		mkfs.vfat $2 -i $3 $DEV 			>> $LOG
		rc=$?
		if [ $rc -ne 0 ]; then
			echo "Problems formatting loop device"	| tee -a $LOG
			break
		fi

		step=4
		mkdir -p $MPT

		step=5
		# argument "-t vfat" here is necessary, busybox's mount requires it
		echo "Mounting device"				| tee -a $LOG
		mount -t vfat $DEV $MPT				| tee -a $LOG
		rc=$?								
		if [ $rc -ne 0 ]; then
			echo "Could not mount device"		| tee -a $LOG
			break
		fi

		step=6
		echo "Getting volume ID" 			| tee -a $LOG
		v1=`/system/bin/vfat-volid --path $MPT -i`
		rc=$?
		if [ $rc -ne 0 ]; then
			echo "Error when getting volume ID"	| tee -a $LOG
			break
		fi

		step=7
		echo "Got volume IDs $v1 and $3, should be identical" | tee -a $LOG
		if [ x$v1 != x$3 ]; then
			rc=$FAIL_CODE				# indicate fail
		fi

		break

	done

	# clean up
	[ $step -gt 5 ] && umount $MPT
	[ $step -gt 4 ] && rmdir $MPT
	[ $step -gt 2 ] && losetup -d $DEV
	[ $step -gt 1 ] && rm $UUT

	return $rc
}

echo "Starting"
mount -o rw,remount /
mkdir /tmp

LOG=/dev/null
if [ $# -ge 1 ]; then
	LOG=$1
fi
for FTYPE in 12 16 32; do
	for SIZE in 360 1024 102400; do
		for ID in 0x12347900 0x00000000 0xDEADBEEF; do
			do_test "$SIZE" "-F $FTYPE" "$ID"
			rc=$?
			if [ $rc -ne 0 ]; then
				echo -e "### FAIL code = $rc" | tee -a $LOG
				echo -e "[vfat_${FTYPE}_${SIZE}_$ID]: test failed"
			else
				echo -e "### PASS"  | tee -a $LOG
				echo -e "[vfat_${FTYPE}_${SIZE}_$ID]: test passed"
			fi
			echo -e "(FTYPE=$FTYPE, SIZE=$SIZE, ID=$ID)\n" | tee -a $LOG
		done
	done
done