#! /bin/sh

do_start()
{
	# setting NFS server's IP
	IP="10.0.2.5"
	# you need to have a backup of /etc/fstab
	if [ -e "/etc/fstab.save" ]
	then
		# test if server is alive
		if ! ping -c 1 -w 5 $IP 2>&1 >/dev/null
		then
			# if it is not alive
			echo "tarantino is down, mount -a impossible."
		else
			# if NFS server is alive then trying to mount directories
			echo "Mounting tarantino's directories via NFS" 
			# getting shared directories
			SHARED=`showmount -e $IP|grep  "^/"|awk -F" " '{print $1;}'`
			# for each shared directory
			for DIR in $SHARED
			do
				# test if a similar directory is present on local host
				if test -d $DIR
				then
					# do nothing if it exists
					a=""
				else
					# else we create it
					echo "	$DIR does not exist, then creating it"
					mkdir $DIR
				fi
				echo "	Adding $IP:$DIR in /etc/fstab"
				# adding an entry in /etc/fstab
				echo "$IP:$DIR	$DIR	nfs	defaults	0	0" >> /etc/fstab
				# saving the mounted path into a log file
				echo "$DIR" >> /var/log/mounted.log
			done
			# finally mount all
			mount -a
			echo "Done"
		fi
	else
		echo "File /etc/fstab.save does not exist, mount -a impossible"
	fi
}

do_stop()
{
	echo "Stopping mounts on tarantino"
	# for each mounted directory we try to unmount them
	for i in `cat /var/log/mounted.log`
	do
		echo "	Unmounting $i"
		umount $i
	done
	echo "	Setting normal fstab"
	# setting original fstab
	cp /etc/fstab.save /etc/fstab
	# removing log file
	rm /var/log/mounted.log
	echo "Done"
}

case $1 in
	start)
		do_start
		;;
	stop)
		do_stop
		;;
	restart)
		do_stop
		sleep 10
		do_start
		;;
	*)
		echo "Usage: service mount-nds {start|stop|restart}"
		exit 1
		;;
esac

exit 0