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#
# backupninja handler to do incremental pull backups using
# rsync and hardlinks; this script grabs folders from a remote
# server and stores incrementally in a local folder. its based on
#
# http://www.mikerubel.org/computers/rsync_snapshots/
#
# feedback: rhatto at riseup.net | gpl
#
setsection general
getconf log /var/log/backupninja-pull.log
getconf backupdir
getconf rotate
getconf days
setsection source
getconf user
getconf server
getconf include
getconf exclude
getconf ssh
getconf rsync
function rotate {
# please use an absolute path
if [[ "$2" < 4 ]]; then
error "Rotate: minimum of 4 rotations"
exit 1
fi
if [ -d $1.$2 ]; then
mv $1.$2 $1.tmp
fi
for ((n=`echo "$2 - 1" | bc`; n >= 0; n--)); do
if [ -d $1.$n ]; then
dest=`echo "$n + 1" | bc`
mv $1.$n $1.$dest
touch $1.$dest
fi
done
if [ -d $1.tmp ]; then
mv $1.tmp $1.0
fi
if [ -d $1.1 ]; then
cp -alf $1.1/. $1.0
fi
}
backupdir="/$backupdir"
if [ ! -d "$backupdir" ]; then
error "Backupdir $backupdir does not exist"
exit 1
fi
if [ -z "$days" ]; then
keep="4"
else
keep="`echo $days - 1 | bc -l`"
fi
for path in $exclude; do
EXCLUDES="$EXCLUDES --exclude=$path"
done
echo "Starting backup at `date`" >> $log
for SECTION in $include; do
section="`basename $SECTION`"
if [ ! -d "$backupdir/$SECTION/$section.0" ]; then
mkdir -p $backupdir/$SECTION/$section.0
fi
info "Rotating $backupdir/$SECTION/$SECTION..."
echo "Rotating $backupdir/$SECTION/$SECTION..." >> $log
rotate $backupdir/$SECTION/$section $keep
info "Syncing $SECTION on $backupdir/$SECTION/$section.0..."
$rsync "$ssh $user@$server:/$SECTION/ $backupdir/$SECTION/$section.0 >> $log
touch $backupdir/$SECTION/$section.0
done
echo "Finnishing backup at `date`" >> $log
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