backuppcExportOnUsbDisk/backup-usb

#!/bin/bash

# Path to backuppcfs script
BACKUPPCFS_PATH="/usr/local/sbin/backuppcfs"

BACKUPPCFS_MNT="/mnt/backuppcfs"
MNT_DIR=/mnt/usb

LUKS_DM_NAME=bkp-usb
LUKS_DM_PATH=/dev/mapper/$LUKS_DM_NAME
LUKS_KEY_FILE="/root/.luks.key"

# LOCK_FILE
LOCK_FILE=/var/lock/bkp-disk.lock

MAIL_FROM=root@localhost
MAIL_TO=root@localhost

function usage() {
	echo "Usage : backup-usb [-d] [-c] [-l /path/to/log.file] [-u /dev/sdX]"
	echo " -d	Debug mode"
	echo " -c	Clean mode"
	echo " -l	Log file path"
	echo " -u	Path of USB disk device"
}

DEBUG=0
CLEAN_MODE=0
LOG=""
DEVICE=""

while getopts ":dcl:u:h" opt
do
        case "$opt" in
                d)
			DEBUG=1
		;;
		c)
			CLEAN_MODE=1
		;;
		l)
			LOG="$OPTARG"
		;;
		u)
			DEVICE="$OPTARG"
		;;
		h)
			usage
			exit 0
		;;
		*)
			echo "Invalid '$opt' parameter"
			echo
			usage
			exit 1
	esac
done

#
# Functions
#
function is_mount () {
	mount | grep -c "$1 "
}

function send_mail () {
	echo "$2"|mail -s "$1" -r "$MAIL_FROM" "$MAIL_TO"
}

function debug () {
	d=`date "+%Y-%m-%d - %Hh%Mm%Ss"`
	if [ -z "$LOG" ]
	then
		echo "$d -- [$1] $2"
	else
		echo "$d -- [$1] $2" >> $LOG 2>&1
	fi
	if [ "$1" == "HALT" ]
	then
		beep -f 300 -l 2000
	fi
	if [ "$3" == "send" ]
	then
		if [ -z "$LOG" ]
		then
			echo "$d -- [INFO] Send mail"
		else
			echo "$d -- [INFO] Send mail" >> $LOG 2>&1
		fi
		send_mail "[$1] Export sauvegardes Backup PC" "$2"
	fi
}

function backup() {
	debug INFO Start send
	if [ -f $LOCK_FILE ]
	then
		debug ERREUR "Le fichier de lock est toujours présent ($LOCK_FILE)." send
		debug HALT
		exit 1
	fi
	debug INFO "Dépot du fichier de lock."
	echo $$ > $LOCK_FILE
	beep -f 1000 -r 2 -l 100

	if [ -e $LUKS_DM_PATH ]
	then
		debug ERREUR "Le device $LUKS_DM_NAME existe deja ($LUKS_DM_PATH)." send
		debug HALT
		exit 1
	fi

	debug INFO "Ouverture du disque LUKS ..."
	cryptsetup luksOpen $DEVICE $LUKS_DM_NAME --key-file $LUKS_KEY_FILE
	RES=$?
	if [ $RES -ne 0 ]
	then
		debug ERREUR "La commande 'cryptsetup luksOpen' n'a pas retourne 0. Code retour : $RES" send
		debug HALT
		exit $RES
	else
		debug INFO "Fait."
	fi


	if [ `is_mount $LUKS_DM_PATH` -eq 1 ]
	then
		debug ERREUR "Le disque est déjà monté" send
		debug HALT
		exit 1
	fi

	debug INFO "Montage du disque."
	mount $LUKS_DM_PATH $MNT_DIR

	if [ `is_mount $LUKS_DM_PATH` -eq 0 ]
	then
		debug ERREUR "Problème durant le montage du disque dur." send
		debug HALT
		exit 1
	fi
	debug INFO "Disque monté."

	debug INFO "Montage de BackupPC FS..."
	$BACKUPPCFS_PATH $BACKUPPCFS_MNT

        RES=$?
        if [ $RES -ne 0 ]
        then
                debug ERREUR "Problème durant le montage de BackupPC FS. Code retour : $RES"
                umount $BACKUPPCFS_MNT
                umount $LUKS_DM_PATH
                cryptsetup close $LUKS_DM_NAME
                debug HALT
                exit 1
        else
                debug INFO "Fait."
        fi

	sleep 2

	debug INFO "Export des sauvegardes ..."
	for dir in $BACKUPPCFS_MNT/*
	do
		[ ! -d "$dir" -o ! -d "$dir/latest/" ] && continue
		host="$( basename "$dir")"
		debug INFO "Export de la dernière sauvegarde du serveur $host ..."
		rsync -a --delete --numeric-ids "$dir/latest/" --exclude='/dev/*' "$MNT_DIR/$host/"
		RES=$?
		if [ $RES -ne 0 ]
		then
			debug ERREUR "Problème durant l'export de la sauvegarde du serveur $host (Code retour : $RES)" send
		else
			debug INFO "Fait."
		fi
	done
	debug INFO "Export des sauvegardes terminé"

	debug INFO "Démontage de BackupPC FS..."
	umount $BACKUPPCFS_MNT
	RES=$?
	if [ $RES -ne 0 ]
	then
		debug ERREUR "Problème durant le démontage de BackupPC FS (Code retour : $RES)" send
	else
		debug INFO "Fait."
	fi

	debug INFO "Démontage du disque"
	umount $LUKS_DM_PATH

	if [ `is_mount $LUKS_DM_PATH` -eq 1 ]
	then
	    debug ERREUR "Problème durant le démontage du disque dur." send
	    debug HALT
	    exit 1
	else
		debug INFO "Fait."
	fi

	debug INFO "Fermeture du disque LUKS..."
	cryptsetup close $LUKS_DM_NAME
	RES=$?
	if [ $RES -ne 0 ]
	then
		debug ERREUR "Problème durant la fermeture du disque LUKS" send
		debug HALT
		exit 1
	fi

	debug INFO "Suppression du fichier de lock"
	rm -f $LOCK_FILE

	debug INFO "Stop" send
	beep -f 1000 -l 2000
}

function clean () {
	umount $MNT_DIR
	cryptsetup close $LUKS_DM_NAME
	umount $BACKUPPCFS_MNT
	rm -f $LOCK_FILE
}

# Manage clean mode
if [ "$CLEAN_MODE" == "1" ]
then
	clean
	exit 0
fi

# Else : we are in backup mode

if [ -n "$LOG" ]
then
	# Close STDOUT file descriptor
	exec 1<&-
	# Close STDERR FD
	exec 2<&-
	
	# Open STDOUT as $LOG file for read and write.
	exec 1<>$LOG
	
	# Redirect STDERR to STDOUT
	exec 2>&1
fi

if [ -z "$DEVICE" ]
then
	debug FATAL "Il faut specifié le disque USB avec le paramètre -u !"
	usage
	exit 1
fi

backup