#!/bin/bash
# Copyright (c) 2008, Michael Lind Mortensen
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of Michael Lind Mortensen nor the
#       names of his contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY MICHAEL LIND MORTENSEN ''AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL MICHAEL LIND MORTENSEN BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
# Define settings
DATA="/home/user1 /home/user2 /etc /var/www/virtual /var/log" #Location of backup files.
DISC="/mnt/backup" # Mount location of backup disc
DEVICE="/dev/sdb1" # Backup devicename
MAILREC="info@example.com" # Define message recipients. Comma-separate for more recipients.
SENDER="noreply@example.com" # Define sender e-mail for error-messaging.
LOG="logfile.txt" # Location of the error logfile
DBPASS="databasepassword" # The root password to the mysql server
 
set $(date)
 
#####################################################
#  Define email functionality for error messaging   #
#                                                   #
# Parameters: MESSAGE - E-mail content from file    #
#                                                   #
#####################################################
function error_mailer {
        MESSAGE=$1
        SUBJECT="Backup process encountered errors!"
        # Send the email using mail
    if mail -s "$SUBJECT" -r "$SENDER"  "$MAILREC" < $MESSAGE
    then
        :
    else
        echo "$3-$2-$6-$4 - ERROR: Mail functionality not working!" >> $LOG
    fi
}
 
#####################################################
#  Define email functionality for success messaging #
#                                                   #
# Parameters: MESSAGE - E-mail content from file    #
#                                                   #
#####################################################
function success_mailer {
        MESSAGE=$1
        SUBJECT="Backup created succesfully!"
        # Send the email using mail
        if mail -s "$SUBJECT" -r "$SENDER" "$MAILREC" < $MESSAGE
        then
                :
        else
                echo "$3-$2-$6-$4 - ERROR: Mail functionality not working!" >> $LOG
        fi
} 
 
# Mount backup disc
if mount $DEVICE $DISC
then
        :
else
        echo "$3-$2-$6-$4 - ERROR: error while mounting disc!" >> $LOG
    error_mailer "/etc/backup_inc/errors/mount_error.txt"
fi
 
# Perform daily full backup
if tar cfz "$DISC/data/data_$3-$2-$6.tgz" $DATA
then
        echo "Data saved successfully!"
else
        echo "$3-$2-$6-$4 - ERROR: error while saving data!" >> $LOG
    error_mailer "/etc/backup_inc/errors/data_error.txt"
fi
 
# Create SQL dumps of databases
if mysqldump -u root --password=$DBPASS --all-databases > "$DISC/database/db_$3-$2-$6.sql"
then
        :
else
        echo "$3-$2-$6-$4 - ERROR: error while making mysqldump!" >> $LOG
    error_mailer "/etc/backup_inc/errors/mysqldump_error.txt"
fi
 
if gzip "$DISC/database/db_$3-$2-$6.sql"
then
        echo "MySQL databases saved and compressed succesfully!"
else
        echo "$3-$2-$6-$4 - ERROR: error while saving mysql databases!" >> $LOG
    error_mailer "/etc/backup_inc/errors/db_error.txt"
fi
 
# Unmount backup disc
if umount $DISC
then
        success_mailer "/etc/backup_inc/success.txt"
else
        echo "$3-$2-$6-$4 - ERROR: error while unmounting disc!" >> $LOG
        error_mailer "/etc/backup_inc/error/umount_error.txt"
fi