#!/bin/bash

[ $# -ne 5 ] && exit 6

DBHOST=${1}
DBUSER=${2}
DBPASS=${3}
DATABASE=${4}
BACKUP_DIR=${5}

BUG=`echo "${DATABASE}" | sed 's/ //g' | grep -i "^information_schema$"`
[ -n "${BUG}" ] && exit 0

HOTCOPY=`which mysqlhotcopy`

[ -z "${HOTCOPY}" ] && exit
[ -z "${BACKUP_DIR}" -o "${BACKUP_DIR}" == "/" ] && exit

[ -e "${BACKUP_DIR}" ] && rm -rf "${BACKUP_DIR}"
[ ! -e "${BACKUP_DIR}" ] && mkdir -p "${BACKUP_DIR}" >/dev/null

use_ip=$(echo "${DBHOST}" | egrep "^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$")

if [ -z "${use_ip}" ]; then
    OPTS="-S ${DBHOST}"
    else
    OPTS="-h ${DBHOST}"
    fi

$HOTCOPY -u "${DBUSER}" -p "${DBPASS}" ${OPTS} --allowold -q "${DATABASE}" "${BACKUP_DIR}" >/dev/null

[ $? -ne 0 ] && exit 100

tar -czf "${BACKUP_DIR}-${DATABASE}.tgz" "${BACKUP_DIR}/${DATABASE}" >/dev/null 2>&1
ret=$?
rm -rf "${BACKUP_DIR}" >/dev/null

exit ${ret}