#!/bin/bash
# This scripts backups all but temporary data on an other harddrive
# If one harddrive fails, I still can boot from the other.
# It uses rsync, which means only the changes since the last backup
# are copied.

# /backup is encrypted. See "Cryptoloop Howto"
# First time:
#   losetup -e aes /dev/loop0 /dev/sda1
#   mkfs.ext3 /dev/loop0
#   losetup -d /dev/loop0
# Mount:
#   mount -t ext3 /dev/sda1 /backup -oencryption=aes
# /etc/fstab
# /dev/sda1   /backup  auto  rw,noauto,encryption=aes  0       0

set -u

#modprobe cryptoloop
#modprobe aes

LOG_DIR=/var/log/backup
LOG_FILE="$LOG_DIR/"`hostname`-`date --iso`.log
BACKUPDIR="/media/backup"
# $BACKUPDIR must be on an other harddrive, 
# an other partition makes no sense
if mount $BACKUPDIR; then
    echo "$BACKUPDIR mounted"
else
    echo "Can not mount $BACKUPDIR. Exit"
	exit 3
fi
mkdir -p $LOG_DIR
echo "Logfile: $LOG_FILE"
echo "---Start Backup:" `date --iso` >> $LOG_FILE
if [ ! -e $LOG_FILE ]; then
    echo "Logfile $LOG_FILE wurde nicht erstellt"
    exit 3
fi
nice -19 incrisync backup rsync -avH --one-file-system \
  --delete-excluded \
  --delete \
  --exclude '/tmp/*'  \
  --exclude '/var/tmp/*' \
  --exclude '/var/run/*' \
  --exclude '/var/log/ksymoops/*' \
  --exclude '/var/cache/*' \
  --exclude '/var/lock/*' \
  --exclude '/var/log/*' \
  --exclude '/var/backup/*' \
  --exclude '/home/data/' \
  --exclude '/home/guettli/tmp/' \
  --exclude '/home/guettli/data/' \
  --exclude '/home/guettli/Maildir/trash/*' \
  --exclude '/home/guettli/.thunderbird/*/ImapMail/' \
  --exclude '/home/guettli/Maildir/.spam/*' \
  --exclude '/home/guettli/Maildir/.listen.*' \
  --exclude '/home/guettli/.gvfs' \
  --exclude '/home/guettli/.firefox/default/*/Cache' \
  --exclude '/home/guettli/.thumbnails/*' \
  --exclude '/home/guettli/.googleearth/*' \
  --exclude '/home/guettli/.gimp*/*' \
  --exclude '/home/guettli/.wine/*' \
  --exclude '/home/guettli/.ies4linux/*' \
  --exclude '/home/guettli/google-earth/*' \
  --exclude '/home/guettli/.local/share/Trash/*' \
  --exclude '/home/guettli/download/*' \
  --exclude '/usr/lib/openoffice' \
  --exclude '/usr/share/doc' \
  --exclude '/usr/share/fonts/truetype' \
  --exclude '/usr/share/ppd' \
  --exclude '/usr/share/xemacs21' \
  --exclude '/usr/share/texmf-tetex' \
  --exclude '/usr/share/gnome/help' \
  --exclude '/**/tmp' \
  --exclude '*.pyc' \
  --exclude '/var/backups/hetzner/years' \
  --exclude '/var/backups/hetzner/months' \
  / /home $BACKUPDIR/r51  >> "$LOG_FILE" 2>&1
ret=$?
echo "---End Backup:" `date --iso` >> $LOG_FILE
umount $BACKUPDIR
echo "Tail of logfile:"
tail $LOG_FILE
if [ $ret -ne 0 ]; then
    echo "Exit Status != 0 !!!!!!!!!!!!!!!!!!!!!!!"
fi
exit $ret