#!/bin/bash
#
# dump Backup Script
# VER. 0.1 - http://exitmind.hybridoptix.net
# Copyright (c) 2007-2008 crainte@hybridoptix.net
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# --------------------------------------------------------------------
# --------------------------------------------------------------------
# Set the following variables to your system needs
# (Detailed instructions below variables)
# --------------------------------------------------------------------

# Backup location e.g /backups
BACKUPDIR="/mnt/backup/filesystem"

# Directory to backup
BACKUP="/home"

# Mail setup
# What would you like to be mailed to you?
# - log  : send only log file
# - stdout : will simply output the log to the screen if run manually
# - quiet : only send logs if an error occurs
MAILCONTENT="log"

# Email Address to send mail to? (user@domain.com)
MAILADDR="admin@clemsonlinux.org"

# --------------------------------------------------------------------
# Advanced Options
# --------------------------------------------------------------------

# Choose Compression level. (0 - 9)
COMPLEVEL="2"

DLEVEL="9"

MLEVEL="0"

# --------------------------------------------------------------------
# Change Log
# --------------------------------------------------------------------
#
# VER 0.1 - (2008-05-02)
#   Initial Release
#
# --------------------------------------------------------------------
# --------------------------------------------------------------------
# --------------------------------------------------------------------
#
# Should not need to be modified from here down
#
# --------------------------------------------------------------------
# --------------------------------------------------------------------
# --------------------------------------------------------------------
VALUE=0
DATE=`date +%Y-%m-%d_%Hh%Mm`                # Datestamp e.g 2002-09-21
DOW=`date +%A`                              # Day of the week e.g. Monday
DNOW=`date +%u`                             # Day number of the week 1 to 7 where 1 represents Monday
DOM=`date +%d`                              # Date of the Month e.g. 27
M=`date +%B`                                # Month e.g January
W=`date +%V`                                # Week Number e.g 37
VER=0.1                                     # Version Number
LOGFILE=$BACKUPDIR/DUMP-`date +%N`.log               # Logfile Name
OPT="-q -u"

# Modify compession level
if [ "$COMPLEVEL" != "2" ]
then
   OPT="$OPT -z$COMPLEVEL"
else
   OPT="$OPT -z"
fi

# Create required directories
if [ ! -e "$BACKUPDIR" ]
then
   mkdir -p "$BACKUPDIR"
fi

# Check for daily directories
if [ ! -e "$BACKUPDIR/daily" ]
then
   mkdir -p "$BACKUPDIR/daily"
fi

# Check for monthly directories
if [ ! -e "$BACKUPDIR/monthly" ]
then
   mkdir -p "$BACKUPDIR/monthly"
fi

HOST=`hostname`

touch $LOGFILE
exec 6>&1        # Link file descriptor #6 with stdout.
                 # Saves stdout.
exec > $LOGFILE  # stdout replaced with file $LOGFILE.

exec 7>&2        # Link file descriptor #7 with stderr.
                 # Saves stderr.
exec 2>&1  # stderr replaced with file $LOGFILE.


# Functions

fsdump () {
/usr/sbin/dump $OPT -f $1 $BACKUP
VALUE=$?
return 0
}

echo =========================================================
echo AutoDumpBackup VER $VER
echo
echo Backup of Server - $HOST
echo =========================================================


echo Backup Start Time `date`
echo =========================================================
if [ $DOM = "01" ]; then
   OPT="-$MLEVEL $OPT"
   echo "Monthly Backup of $BACKUP..."
   echo
   fsdump "$BACKUPDIR/monthly/$DATE.$M.backup"
   echo
   echo ------------------------------------------------------
else
   OPT="-$DLEVEL $OPT"
   echo "Daily Backup of $BACKUP..."
   echo Rotating last weeks Backup...
   eval rm -fv "$BACKUPDIR/daily/*.$DOW.backup"
   echo
   fsdump "$BACKUPDIR/daily/$DATE.$DOW.backup"
   echo
   echo ------------------------------------------------------
fi

echo Backup End `date`
echo =========================================================


echo Total disk space used for backup storage...
echo Size - Location
echo `du -hs "$BACKUPDIR"`
echo
echo =========================================================


# Clean up IO redirection
exec 1>&6 6>&-
exec 2>&7 7>&-

if [ "$MAILCONTENT" = "log" ]; then
   cat "$LOGFILE" | mail -s "Filesystem Dump Log for $HOST - $DATE" $MAILADDR
elif [ "$MAILCONTENT" = "quiet" ]; then
   if [ "$VALUE" = "3" ]; then
      cat "$LOGFILE"
   fi
else
   cat "$LOGFILE"
fi

if [ "$VALuE" != 0 ]
then
   STATUS=1
else
   STATUS=0
fi

# Clean up Logfile
eval rm -f "$LOGFILE"

exit $STATUS