#!/bin/bash

if [ "$(whoami)" != "root" ]; then
	echo "Must be running as root!"
	exit 1
fi

DIR="/root/backup/$(date +%s)"

if [ -d "$DIR" ]; then
	echo "Backup already running!?"
	exit 1
fi

mkdir -p "$DIR"
cd "$DIR" || exit 1

mysqldump --defaults-extra-file=/etc/mysql/debian.cnf --add-locks --add-drop-database --default-character-set=utf8 --databases openslx > openslx.sql
RET1=$?
mysqldump --defaults-extra-file=/etc/mysql/debian.cnf --add-locks --add-drop-database --default-character-set=utf8 --databases sat > sat.sql
RET2=$?
if [ $RET1 -ne 0 ] || [ $RET2 -ne 0 ]; then
	echo "Database dump failed with exit code $RET1/$RET2"
	exit 1
fi

FILELIST="
	/opt/openslx/configs
	/etc/lighttpd/server.pem
	/etc/lighttpd/chain.pem
	/etc/lighttpd/pub-cert.pem
"

tar --ignore-failed-read -k -c -p -z -f files.tgz $FILELIST # no quotes here!
RET=$?
if [ $RET -ne 0 ]; then
	echo "WARNING: filesystem-tar exited with code $RET - backup might be incomplete!"
fi

tar -k -c -z -f backup.tgz files.tgz openslx.sql sat.sql
RET=$?
if [ ! -f backup.tgz ]; then
	echo "Creating backup.tgz failed!"
	exit 1
fi
if [ $RET -ne 0 ]; then
	echo "WARNING: final tar exited with code $RET - backup might be incomplete!"
fi

chown www-data backup.tgz
chmod 0600 backup.tgz

FILE="/tmp/bwlp-backup-$(date +%s)-${RANDOM}.tgz"
if ! mv backup.tgz "$FILE"; then
	echo "moving backup to $FILE failed."
	exit 1
fi

rm -rf -- /root/backup/1*

echo "Location: $FILE"
exit 0