[Evolution] Backing up.

[Bram Mertens]

On Mon, 2004-03-08 at 14:56, Steven Tryon wrote:
[...]
> I also have accumulated a large number of cache folders under
> ~/evolution/mail/pop and pop3, which I assume can be safely cleared
> before backing up?
[...]

I have created the following two scripts to backup evolution:
--- bu-evo ---
#!/bin/bash

echo 'shutting down evolution and background processes'

evolution --force-shutdown

echo 'backing up /home/m8ram/evolution/'

/home/m8ram/bin/bu -e -s /home/m8ram/evolution/ -d /data/backup/evolution/

echo 'backing up /home/m8ram/.gconf/apps/evolution/'

/home/m8ram/bin/bu -s /home/m8ram/.gconf/apps/evolution/ -d /data/backup/gconf/
--- bu-evo ---

--- bu ---
#!/bin/bash

SOURCE_DIR=
TARGET_DIR=
PROGNAME=$(basename $0)
VERSION="0.8"

EXT=.tar.bz2
SPLIT=
COUNTER=1

DATE=$(date +'%Y%m%d')          # The name of the backup is in YYYYMMDD-format

BU_EVOLUTION=
EXCLUDELIST=/data/backup/evolution/exclude-index


function error_exit
{
        #####
	# 	Function for exit due to fatal program error
	# 	Accepts 1 argument
	#		string containing descriptive error message
	#####

	echo "${PROGNAME}: ${1:-"Unknown Error"}" >&2
	exit 1

}


function graceful_exit
{
        #####
	#	Function called for a graceful exit
        #       Tests whether or not the backup was created
	#	No arguments
	#####

        if [ -f ${TARGET_DIR}/${DATE}${SPLIT}${EXT} ]; then
	    echo "backup ${TARGET_DIR}/${DATE}${SPLIT}${EXT} created"
	    exit
	else
	    echo "${PROGNAME}: ${1:-"Unknown Error"}" >&2
	    echo "backup ${TARGET_DIR}/${DATE}${SPLIT}${EXT} has not been created"
	    exit 1
	fi

}


function signal_exit
{
	#####
	#	Handle termination signals
	#	Arguments:
	#		1	signal spec (required)
	#####

	# Fatal error if required arguments are missing

	if [ "bu" = "" ]; then
		error_exit "signal_exit: missing argument 1"
	fi

	case bu in
		INT)	echo "bu: Aborted by user" # TODO call int_exit?
			exit
			;;
		TERM)	echo "bu: Terminated" # TODO call term_exit?
			exit
			;;
		*)	error_exit "Terminated on unknown signal"
 			;;
	esac

}	# end of signal_exit


function term_exit
{
	#####
	#	Function to perform exit if termination signal is trapped
	#	No arguments
	#####

	echo "${PROGNAME}: Terminated"
	graceful_exit
}


function int_exit
{
	#####
	#	Function to perform exit if interrupt signal is trapped
	#	No arguments
	#####

	echo "${PROGNAME}: Aborted by user"
	exit
}


function usage
{
	#####
	#	Function to display usage message (does not exit)
	#	No arguments
	#####

	echo "Usage: ${PROGNAME}"
# this still needs to be written properly

}


function helptext
{
	#####
	#	Function to display help message for program
	#	No arguments
	#####

	echo "Usage: ${PROGNAME}"
# this still needs to be written properly

}	


function test_source
{
	#####
	#	Function to check that source directory exists
	#	No arguments
	#####

	if [ ! -d ${SOURCE_DIR} ]; then
		echo "Source directory ${SOURCE_DIR} does not exist!" 1>&2
		exit 1
	fi
}


function test_target
{
	#####
	#	Function to check that target directory exists, and create it if it does not
	#	No arguments
	#####

	if [ ! -d ${TARGET_DIR} ]; then
		echo "Target directory ${TARGET_DIR} does not exist!" 1>&2
		echo "Creating ${TARGET_DIR}" 1>&2
		mkdir -p ${TARGET_DIR}
	fi

}


function bu_normal
{
	#####
	#	Function to perform the actual backup
	#	No arguments
	#####

        echo "Creating backup of ${SOURCE_DIR}"
	tar -cjf ${TARGET_DIR}/${DATE}${SPLIT}${EXT} ${SOURCE_DIR}
	graceful_exit

}

function bu_evolution
{
	#####
	#	Function to perform the actual backup
	#	first check if the file already exists
	#	exclude 'mbox.*'
	#	No arguments
	#####

	if [ -f ${EXCLUDELIST} ]; then
	    echo "Creating backup of ${SOURCE_DIR}"
	    tar --exclude-from=${EXCLUDELIST} -cjf ${TARGET_DIR}/${DATE}${SPLIT}${EXT} ${SOURCE_DIR}
	    graceful_exit
	else
	    echo "${EXCLUDELIST} does not exist!"
	    echo "NO BACKUP CREATED!!!"
	    echo "Create the file ${EXCLUDELIST} by running:"
	    echo "find ${SOURCE_DIR} -name "mbox.*" > ${EXCLUDELIST}"
	    echo "and rerun ${PROGNAME}"
	    exit 1
	fi

}


###########################################################################
#	Program starts here
###########################################################################

##### Command Line Processing #####

while [ "$1" != "" ]; do
    case $1 in
        -s | --source )         shift
                                SOURCE_DIR=$1
                                ;;
        -d | --destination )    shift
                                TARGET_DIR=${1%/}
                                ;;
        -e | --evolution )      BU_EVOLUTION=1
                                ;;
        -h | --help )           helptext
                                graceful_exit
                                ;;
        * )                     usage
                                exit 1
    esac
    shift
done


##### Main Logic #####

test_source

test_target

# Perform the backup: check if backup already exists

while [ $COUNTER -lt 10 ]; do
	if [ -f ${TARGET_DIR}/${DATE}${SPLIT}${EXT} ]; then
		echo "you already created a backup today! ${TARGET_DIR}${DATE}${SPLIT}${EXT}"
		echo "creating extra backup..."
		COUNTER=$((COUNTER + 1))
		SPLIT=-${COUNTER}
	else
	    if [ "$BU_EVOLUTION" = "1" ]; then
		bu_evolution
	    else
		bu_normal
	    fi

	    COUNTER=10
	    exit
	fi
done

graceful_exit
--- bu ---

This backs up all the important stuff but leaves out the
(space-consuming) index-files...

HTH
-- 
# Mertens Bram "M8ram"   <bram-mertens@linux.be>     Linux User #249103 #
# SuSE Linux 8.2 (i586) kernel 2.4.20-4GB      i686                256MB RAM #
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