#!/bin/bash
#
# Backup script - gateway
#
# This script is intended to be run as root, as a cron-job
# TODO: Add validation to un-screw-up /some/messed/dir/ (problem with trailing /)
#
# Author:	Alan Briolat <alan.briolat@gmail.com>
#

# Set directories to back up
#DIRS="/etc:/home/alan:/root:/var/lib/portage";
DIRS="/etc:/root:/var/lib/portage";

# Set backup server
BACKUP_HOST="lithium";

# Set dotglob so that .files are included when compressing
shopt -s dotglob;

# Get hostname
HOSTNAME=$(hostname);
# Get datestamp
DATE=$(date +"%Y-%m-%d-%H%M");


# Create working directory and cd into it
WORKING_DIR=/tmp/backup-${DATE};
mkdir -p ${WORKING_DIR} || {
	echo "Could not create ${WORKING_DIR}";
	exit 1;
};
cd ${WORKING_DIR} || {
	echo "Could not 'cd' to ${WORKING_DIR}";
	exit 1;
};

# Iterate through directories
for CURRENT_DIR in $( echo $DIRS | sed 's/:/ /g'); do {
	# Check that the path is absolute
	if [ ! ${CURRENT_DIR:0:1} = '/' ]; then {
		echo "${CURRENT_DIR} is not an absolute path";
		exit 1;
	}; fi;
	# Check that the path exists
	if [ ! -e $CURRENT_DIR ]; then {
		echo "$CURRENT_DIR does not exist";
		exit 1;
	}; fi;
	# If everything is fine, generate a filename ...
	FILENAME_DIR=$( echo ${CURRENT_DIR:1} | sed 's/\//./g' );
	FILENAME="${WORKING_DIR}/${HOSTNAME}-${FILENAME_DIR}-${DATE}.tar.bz2";
	# ... and create the archive!
	cd ${CURRENT_DIR};
	# Added 'nice -n 15' to stop it bugging me at 3am!
    nice -n 15 tar -cjpf ${FILENAME} *;
}; done;


# Send files to server via SCP
#cp ${WORKING_DIR}/* /backup/files/
scp -Bq -i /root/.ssh/backup_dsa ${WORKING_DIR}/* backup@${BACKUP_HOST}:/backup/files
#scp -Bq -i /root/.ssh/backup_dsa ${WORKING_DIR}/* backup@${BACKUP_HOST}:/backup/${HOSTNAME}/


# LAST SECTION!!!
# Move out of temp dir and clean up
cd ..
rm -rf ${WORKING_DIR}