#!/bin/bash

# **************************************************************

# file: backup

# date: 2006-02-08 22:27

# author: Marko Schulz - <info@shellXpress.de>

# description: simple backup script with GNU tar

# **************************************************************

#

# I put the following line in my crontab. This make every day

# an incremental backup other than sunday a full backup.

#

# These lines must be on line in your crontab.

# 0 23 * * * [ -n "`date +%a | grep -E '^(So|Sun)'`" ] 

#	&& ( /usr/local/sbin/backup -f ) 

#	|| ( /usr/local/sbin/backup -i ) >/dev/null 2>&1

#

# Directory(s) which will be backup.

backup="/etc /home /root /usr/local/bin /usr/local/sbin /var/cache /var/lib /var/mail /var/spool"

#

# File in which stored the date of the last full backup.

datefile="/var/log/backup/date.log"

#

# Directory in which the created backup stored.

dumpdir="/data/backup"

#

# Files and directorys list in these file will not backup.

prunefile="/var/log/backup/exclude.log"

#

# Mail configuration:

#  Switch to line 77 and follow (mail section) to set your

#  mail variables...

#

# **************************************************************

# program action...

# Get current date...

current=$( date +"%m/%d/%y %H:%M" )

# Get last backup date...

date=$( cat $datefile 2>/dev/null )

# Temporary error variable...

ERROR=0

# Lets go...

case "$1" in

	-f|--full)

		# Update full backup date...

		( echo $current > $datefile; chmod 0640 $datefile )

		# Get Full backup...

		( tar --exclude-from $prunefile 

			-czf $dumpdir/backup-full-$( hostname )-$( date +"%Y-%m-%d_%H%M" ).tar.gz $backup >/dev/null 2>&1 )

		# Set exit state...

		[ "$?" != 0 ] && ERROR=1

	;;

	-i|--incremental)

		# Get Incremental Backup...

		( tar -N "$date" 

			--exclude-from $prunefile 

			-czf $dumpdir/backup-incremental-$( hostname )-$( date +"%Y-%m-%d_%H%M" ).tar.gz $backup >/dev/null 2>&1 )

		# Set exit state...

		[ "$?" != 0 ] && ERROR=2

	;;

	*)

		# Bad exec...

		echo -e "Usage: $( basename $0 ) -f --full | -i --incremental"

		echo -e "t-i|--incremental get incremental backup"

		echo -e "t-f|--full        get full backupa"

		# Set exit state...

		ERROR=3

	;;

esac

# Sent notify mail, if an error is given.

if [ "$ERROR" != 0 ]; then

	# define subject depending on error state...

	if [ "$ERROR" = 1 ]; then

		subject="[$( hostname )] Full backup failed"

		headline="Full backup failed on $( hostname )"

	elif [ "$ERROR" = 2 ]; then

		subject="[$( hostname )] Incremental backup failed"

		headline="Incremental backup failed on $( hostname )"

	elif [ "$ERROR" = 3 ]; then

		subject="[$( hostname )] Backup failed"

		headline="Backup failed on $( hostname )"

	fi

	# Define mail header To/From/Subject etc...

	mail="To: "Your Name" <your@domain.de>n"

	mail="${mail}Reply-to: "Your Name" <your@domain.de>n"

	mail="${mail}From: "System Operator" <root@$( hostname ).your.domain>n"

	mail="${mail}X-Mailer: Custom-CGI: $( basename $0 )n"

	mail="${mail}MIME-Version: 1.0n"

	mail="${mail}Subject: $subjectn"

	mail="${mail}Importance: Highn"

	mail="${mail}Content-Type: text/plain; charset=iso-8859-1n"

	mail="${mail}Content-Transfer-Encoding: 8bitnn"

	# Define mail body...

	body="${mail}================================================n"

	body="${body}program: $0n"

	body="${body}hostname: $( hostname )n"

	body="${body}contact: Your Name <your@domain.de>n"

	body="${body}date/time: $( date +"%Y-%m-%d %H:%M:%S" )n"

	body="${body}================================================nn"

	body="${body}*${headline}*nn"

	# Here can you read an error file and put the output to message.

	#    eg.  message="$( cat /path/to/errorfile )n"

	# or type in what you thing :-)

	message=""

	# Concatenate message to body...

	body="${body}${message}n"

	# sent mail with sendmail...

	echo -e "${body}" | /usr/sbin/sendmail -t

fi

# exit program...

exit $ERROR

# **************************************************************

# end of this script...