Synology btrfs snapshots when needed.

snapshots.sh

#!/bin/sh
NOW=$(date +"%Y-%m-%d")
BPATH=/volume1/Guy/log
RUNLOG=/volume1/Guy/log/$NOW.txt

NAME="Guy"
echo  ------------------- START SNAPSHOT $NAME -- $(date) | tee -a $RUNLOG
SOURCE="/volume1/$NAME"
LAST=$(find $SOURCE -type d -name '#snapshot' -prune -o -type d -name 'log' -prune -o -type f -printf '%T@\n' | sort -n | tail -1 | cut -f1- -d" ")
PREV=$(cat "$BPATH/timestamp_$NAME.txt")
echo $LAST>"$BPATH/timestamp_$NAME.txt"
if [ "$LAST" != "$PREV" ]
then
	/usr/syno/bin/synosnapschedtask.sh local share "$NAME"
else
	echo Nothing to do | tee -a $RUNLOG
fi
echo  ------------------- END SNAPSHOT  $NAME -- $(date) | tee -a $RUNLOG

NAME="Kirby"
echo  ------------------- START SNAPSHOT $NAME -- $(date) | tee -a $RUNLOG
SOURCE="/volume1/$NAME"
LAST=$(find $SOURCE -type d -name '#snapshot' -prune -o -type d -name 'log' -prune -o -type f -printf '%T@\n' | sort -n | tail -1 | cut -f1- -d" ")
PREV=$(cat "$BPATH/timestamp_$NAME.txt")
echo $LAST>"$BPATH/timestamp_$NAME.txt"
if [ "$LAST" != "$PREV" ]
then
	/usr/syno/bin/synosnapschedtask.sh local share "$NAME"
else
	echo Nothing to do | tee -a $RUNLOG
fi
echo  ------------------- END SNAPSHOT  $NAME -- $(date) | tee -a $RUNLOG

NAME="Tobi"
echo  ------------------- START SNAPSHOT $NAME -- $(date) | tee -a $RUNLOG
SOURCE="/volume1/$NAME"
LAST=$(find $SOURCE -type d -name '#snapshot' -prune -o -type d -name 'log' -prune -o -type f -printf '%T@\n' | sort -n | tail -1 | cut -f1- -d" ")
PREV=$(cat "$BPATH/timestamp_$NAME.txt")
echo $LAST>"$BPATH/timestamp_$NAME.txt"
if [ "$LAST" != "$PREV" ]
then
	/usr/syno/bin/synosnapschedtask.sh local share "$NAME"
else
	echo Nothing to do | tee -a $RUNLOG
fi
echo  ------------------- END SNAPSHOT  $NAME -- $(date) | tee -a $RUNLOG

NAME="web"
echo  ------------------- START SNAPSHOT $NAME -- $(date) | tee -a $RUNLOG
SOURCE="/volume1/$NAME"
LAST=$(find $SOURCE -type d -name '#snapshot' -prune -o -type d -name 'log' -prune -o -type f -printf '%T@\n' | sort -n | tail -1 | cut -f1- -d" ")
PREV=$(cat "$BPATH/timestamp_$NAME.txt")
echo $LAST>"$BPATH/timestamp_$NAME.txt"
if [ "$LAST" != "$PREV" ]
then
	/usr/syno/bin/synosnapschedtask.sh local share "$NAME"
else
	echo Nothing to do | tee -a $RUNLOG
fi
echo  ------------------- END SNAPSHOT  $NAME -- $(date) | tee -a $RUNLOG

exit 0