#!/bin/bash
SSHFS_MPOINT=/mnt/sshfs;

REMOTE_BACKUP_USER=user;
REMOTE_BACKUP_HOST=192.168.1.1;
REMOTE_BACKUP_FOLDER=/mnt/somedisk/backup;
REMOTE_BACKUP_PORT=22;

case "$1" in
	rotate)
		#Check if the sshfs mount point exists, create it if it does not
		if [ -d $SSHFS_MPOINT ]; then
			#Do nothing, the mount point exists	
			:
		else
			echo "Creating sshfs mount point:" $SSHFS_MPOINT;
			mkdir $SSHFS_MPOINT;
		fi

		#Mount remote backup folder via sshfs
		sshfs -p $REMOTE_BACKUP_PORT $REMOTE_BACKUP_USER@$REMOTE_BACKUP_HOST:$REMOTE_BACKUP_FOLDER $SSHFS_MPOINT

		#Delete oldest backup, if it exists
		if [ -d $SSHFS_MPOINT/weekly3 ] ; then
			rm -rf $SSHFS_MPOINT/weekly3 ;
		fi ;

		#Rotate (weekly0 -> weekly1, weekly1 -> weekly2, weekly2 -> weekly3)
		if [ -d $SSHFS_MPOINT/weekly2 ] ; then			
			echo "Rotating weekly2 -> weekly3"
			mv $SSHFS_MPOINT/weekly2 $SSHFS_MPOINT/weekly3;
		fi;
		if [ -d $SSHFS_MPOINT/weekly1 ] ; then			
			echo "Rotating weekly1-> weekly2"
			mv $SSHFS_MPOINT/weekly1 $SSHFS_MPOINT/weekly2;
		fi;
		if [ -d $SSHFS_MPOINT/weekly0 ] ; then			
			echo "Rotating weekly0 -> weekly1"
			mv $SSHFS_MPOINT/weekly0 $SSHFS_MPOINT/weekly1;
		fi;

		#Umount sshfs
		echo "Unmounting:" $SSHFS_MPOINT;
		umount $SSHFS_MPOINT;

		echo "Done rotating"
		;;

	dailybackup)
		echo "Backing up /var/log";
		rsync --delete -avzR -e "ssh -p "$REMOTE_BACKUP_PORT /var/log/ $REMOTE_BACKUP_USER@$REMOTE_BACKUP_HOST:$REMOTE_BACKUP_FOLDER/weekly0
		echo "Backing up /home";
		rsync --delete -avzR -e "ssh -p "$REMOTE_BACKUP_PORT /home/ $REMOTE_BACKUP_USER@$REMOTE_BACKUP_HOST:$REMOTE_BACKUP_FOLDER/weekly0
		echo "Backing up /etc";
		rsync --delete -avzR -e "ssh -p "$REMOTE_BACKUP_PORT /etc/ $REMOTE_BACKUP_USER@$REMOTE_BACKUP_HOST:$REMOTE_BACKUP_FOLDER/weekly0
		;;
esac;
exit 0;