### directory which should contain backup sets ###
RSNAP_BASE=/media/<id_der_usb_platte>/Backup/Dreambox/rsnap


### directory which should be backuped ###
### Important: without an slash at the end ###
RSNAP_SOURCE=/media/hdd/movie


### keep on every backup-set deletion the last x backup-sets ###
RETENTION_COUNT=30


### define directory format for backup-sets ###
DATE=`date +"%Y%m%d%H%M"`
RSNAP_SET_FORMAT=rsnap_$DATE


### rsync options ###
OPTIONS="-aW --protocol=28 --delete"


### Logfile ###
LOGFILE=rsnap.log

#!/bin/sh


BASEDIR=$(dirname $0)
. $BASEDIR/rsnap.conf


PATH=$PATH:/bin:/usr/bin
LOG=$RSNAP_BASE/$LOGFILE
ERROR_COUNT=0


RSNAP_DEST=$RSNAP_BASE/$RSNAP_SET_FORMAT
echo "" >> $LOG
echo "===============================================" >> $LOG
echo "Date: $DATE" >> $LOG
echo "===============================================" >> $LOG
echo "Source: $RSNAP_SOURCE" >> $LOG
echo "Destination Base: $RSNAP_BASE" >> $LOG
echo "Destination: $RSNAP_DEST" >> $LOG
echo "Retention-Keep: $RETENTION_COUNT" >> $LOG
echo "Logfile: $LOG" >> $LOG
echo "===============================================" >> $LOG


### create rsnap-sets ###


EXISTING_SETS=`ls -1 $RSNAP_BASE | grep -v $LOGFILE`
SET_COUNT=`ls -1 $RSNAP_BASE | grep -v $LOGFILE | wc -l`
if [ $SET_COUNT -eq 0 ]; then
  echo "--> doing first full-backup" >> $LOG
  ### speed-up first full-backup with cp instead of rsync ###
  ##  echo "rsync $OPTIONS $RSNAP_SOURCE $RSNAP_DEST" >> $LOG
  ##  rsync $OPTIONS $RSNAP_SOURCE $RSNAP_DEST >> $LOG 2>> $LOG
  echo "mkdir -p $RSNAP_DEST" >> $LOG
  mkdir -p $RSNAP_DEST >> $LOG 2>> $LOG
  echo "cp -aR $RSNAP_SOURCE $RSNAP_DEST" >> $LOG
  cp -aR $RSNAP_SOURCE $RSNAP_DEST >> $LOG 2>> $LOG
  ERR=$?
  ERROR_COUNT=$((ERROR_COUNT+ERR))
  echo "Return: $ERR" >> $LOG
else
  for SET in $EXISTING_SETS
  do
    LAST_SET=$SET
  done
  echo "--> doing incremental backup to $LAST_SET" >> $LOG
  echo "rsync $OPTIONS --link-dest=$RSNAP_BASE/$LAST_SET $RSNAP_SOURCE $RSNAP_DEST" >> $LOG
  rsync $OPTIONS --link-dest=$RSNAP_BASE/$LAST_SET $RSNAP_SOURCE $RSNAP_DEST >> $LOG 2>> $LOG
  ERR=$?
  ERROR_COUNT=$((ERROR_COUNT+ERR))
  echo "Return: $ERR" >> $LOG
fi


### delete old rsnap-sets ###


echo "===============================================" >> $LOG
echo "delete backup-sets except the last $RETENTION_COUNT" >> $LOG
i=$SET_COUNT
for SET in $EXISTING_SETS
do
  if [ $i -le $RETENTION_COUNT ]; then
    echo "$SET --> keep" >> $LOG
  else
    echo "$SET --> delete" >> $LOG
    rm -Rf $RSNAP_BASE/$SET >> $LOG 2>> $LOG
    ERR=$?
    ERROR_COUNT=$((ERROR_COUNT+ERR))
    echo "Return: $ERR" >> $LOG
  fi
  i=$((i-1))
done
echo "===============================================" >> $LOG
echo "ErrorCount: $ERROR_COUNT" >> $LOG
echo "===============================================" >> $LOG