#!/bin/sh
#unmount the overlayfs
uovmount

# if uovmount failed, exit
if [ $? -ne 0 ]; then
	exit 1
	read -p "Press enter to exit"
fi

# Check if any processes are using the mount devices
PIDUSINGFS=
for mount in /mnt/*; do
	if [ -d "${mount}" ]; then
	USINGDIR=`fuser -m ${mount}`
	if [ $? -eq 0 ]; then
		for pid in ${USINGDIR}; do
			if [ -z "$TEXTUSINGFS" ]; then
				TEXTUSINGFS="`ps | grep "$pid" | grep -v grep | awk '{print $5}'`"
			else
				TEXTUSINGFS="$TEXTUSINGFS, `ps | grep "$pid" | grep -v grep | awk '{print $5}'`"
			fi
		done
		PIDUSINGFS="$PIDUSINGFS $USINGDIR"
	fi
	fi
done
if [ -n "$PIDUSINGFS" ]; then
	echo "The following programs are using mount points:"
	echo "$TEXTUSINGFS"
	read -p "Ok to kill these programs? (Y/n): " CHOICE
	if [ "$CHOICE" == "N" ] || [ "$CHOICE" == "n" ]; then
		echo "Mount points STILL mounted, exiting..."
		sleep 4
		exit 1
	else
		echo "Killing all programs using the mount points..."
		kill -9 ${PIDUSINGFS}
		if [ $? -ne 0 ]; then
			echo "Problem killing programs, exiting..."
			sleep 4
			exit 1
		fi
	fi
fi

# Unmount SD Cards
echo "Attempting to unmount mount points..."
for mount in /mnt/*; do
	echo "Unmounting $mount"
	umount ${mount} &>/dev/null
	if [ $? -eq 0 ]; then
		rmdir ${mount}
	fi
done

echo "Finished. Press enter to continue"
read