daily-backup.sh

#!/bin/bash

##########################################################
#         Autor: Dennis Ullrich             ##
#    E-Mail: request@decstasy.de            ##
#     Last edit: 2014-12-17             ##
#       Version: 0.4                    ##
#   License: GNU General Public License (GPL)   ##
#  Designed for: Daily Cron Backup          ##
#   Description: Makes a fucki'n backup ^.^     ##
##########################################################

# Where the backup will be stored
backupdir="/var/backups/inc-backup"

# How many Days the backup will store the files (do not enter a value < 2)
days="31"

# Where the list of the folders, which should be backed up, is located
backuplist="$backupdir/backup.conf"

# Log directory
logdir="$backupdir/logs"

#------------ No further editing needed

case $1 in
*)  if [ ! -d $logdir ]
    then
        mkdir -p -v $logdir;
    fi
    logfile="$logdir/`date +"%Y.%m.%d"`.log"
    touch $logfile
    echo "`date +"%Y.%m.%d %H:%M:%S"` - Removing old logs (older than $days)" | tee -a $logfile
    find $logdir -mtime +$days -exec rm -v {} \; | tee -a $logfile

    if [ ! -d "$backupdir" ]
    then
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Creating backupdir" | tee -a $logfile
        mkdir -p -v $backupdir  | tee -a $logfile
    fi

    echo "`date +"%Y.%m.%d %H:%M:%S"` - Set backuppath to $backupdir/backup.`date +"%Y.%m.%d"`"  | tee -a $logfile
    backuppath="$backupdir/backup.`date +"%Y.%m.%d"`"

    echo "`date +"%Y.%m.%d %H:%M:%S"` - Creating backupdir $backuppath"  | tee -a $logfile
    mkdir $backuppath  | tee -a $logfile
    if [ -d "$backupdir/backup.`date --date="$days day ago" +"%Y.%m.%d"`" ]; then
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Moving oldest backup content ($backupdir/backup.`date --date="$days day ago" +"%Y.%m.%d"`/*) to $backuppath"  | tee -a $logfile
        mv $backupdir/backup.`date --date="$days day ago" +"%Y.%m.%d"`/* $backuppath  | tee -a $logfile
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Removing $backupdir/backup.`date --date="$days day ago" +"%Y.%m.%d"`" | tee -a $logfile
        rm -rf $backupdir/backup.`date --date="$days day ago" +"%Y.%m.%d"` | tee -a $logfile
    fi

    if [ -d "$backupdir/backup.`date --date='01 day ago' +"%Y.%m.%d"`" ]
    then
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Copying (updating) backup from yesterday hardlinked into backupdir."  | tee -a $logfile
        cp -alu $backupdir/backup.`date --date='01 day ago' +"%Y.%m.%d"`/* $backuppath | grep -v '^cp: cannot create hard link'  | tee -a $logfile
    fi

    if [ -e $backuplist ]
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Starting preflight check from $backuplist"  | tee -a $logfile
        for line in $(cat "$backuplist"); do
            if [ ! -d $line ]
                echo "ERROR: Directory $line from backuplist does not exist. Backup aborted!"  | tee -a $logfile
                exit 1
            fi
        done
        echo "`date +"%Y.%m.%d %H:%M:%S"` - Preflight check passed."  | tee -a $logfile
    else
        echo "ERROR: $backuplist is not valid. Backup aborted!"  | tee -a $logfile
        exit 1
    fi

    for line in $(cat "$backuplist"); do
            echo "`date +"%Y.%m.%d %H:%M:%S"` - Started backup from ${line}"  | tee -a $logfile
        rsync -a -v --delete --checksum ${line} $backuppath/ >> $logfile.filelist
    done
    echo "`date +"%Y.%m.%d %H:%M:%S"` - Daily Backup is finished!" | tee -a $logfile
;;
esac

exit 0