Qnap [Tuto QNAP] Garder deux fichiers locaux en sync

#!/bin/sh

# select the two files
FILE1="/dir1/file1"
FILE2="/dir2/file1"

# use or create a log file with timestamp of the output
LOG="Log.txt"
TIMESTAMP=$(date +"%Y-%m-%d %Hh:%M")

if [ ! -e $LOG ]; then
	touch $LOG
	echo "$TIMESTAMP - INFO: '$LOG' does not exists but has been created." >&2
	# send output to LOG file
	echo "$TIMESTAMP - INFO: '$LOG' does not exists but has been created." >> $LOG
# else
#	echo "$TIMESTAMP - INFO: '$LOG' exists and it will be used if any change to '$FILE1' 
# 	or to '$FILE2' is needed." >&2
fi

# You can also pass the two file names as arguments for the script
if [[ $# == 2 ]]; then
	FILE1=$1
	FILE2=$2
fi

# check if the two files exist and are regular
if [ -f "$FILE1" -a -f "$FILE2" ]; then

	# meanwhile compare FILE1 against FILE2
	# if files are identical, stop there
	if cmp "$FILE1" "$FILE2" 2>/dev/null>/dev/null; then
		# send output to terminal
		echo "$TIMESTAMP - INFO: '$FILE1' and '$FILE2' are identical." >&2
		# send output to LOG file
		# echo "$TIMESTAMP - INFO: '$FILE1' and '$FILE2' are identical." >> $LOG

	# if FILE1 is newer than FILE2, copy FILE1 over FILE2
	elif [ "$FILE1" -nt "$FILE2" ]; then
		# if copy is successful
		if cp -p "$FILE1" "$FILE2"; then
			# send output to terminal
			echo "$TIMESTAMP - INFO: '$FILE1' replaced '$FILE2'." >&2
			# send output to LOG file
			echo "$TIMESTAMP - INFO: '$FILE1' replaced '$FILE2'." >> $LOG
			# send output to QTS
			/sbin/log_tool -a "$TIMESTAMP - INFO: '$FILE1' replaced '$FILE2'." -t 1 >&2
		# if copy is unsuccessful
		else
			# send output to terminal
			echo "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'." >&2
			# send output to LOG file
			echo "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'." >> $LOG
			# send output to QTS
			/sbin/log_tool -a "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'" -t 2 >&2
			exit 1
		fi

	# if FILE1 is older than FILE2, copy FILE2 over FILE1
	elif [ "$FILE1" -ot "$FILE2" ]; then 
		# if copy is successful
		if cp -p "$FILE2" "$FILE1"; then
			# send output to the LOG file
			echo "$TIMESTAMP - INFO: '$FILE2' replaced '$FILE1'." >&2
			# send output to LOG file
			echo "$TIMESTAMP - INFO: '$FILE2' replaced '$FILE1'." >> $LOG
			# send output to QTS
			/sbin/log_tool -a "$TIMESTAMP - INFO: '$FILE2' replaced '$FILE1'." -t 1 >&2
		# if copy is unsuccessful
		else
			# send output to the LOG file
			echo "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'." >&2
			# send output to LOG file
			echo "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'." >> $LOG
			# send output to QTS
			/sbin/log_tool -a "$TIMESTAMP - ERROR: FAILED to replace '$FILE2' with '$FILE1'." -t 2 >&2
			exit 1
		fi

	# if two files are not identical but with same modification date
	else
		# send output to the LOG file
		echo "$TIMESTAMP - ERROR: We should never reach this point. Something is wrong in the script." >&2
		# send output to LOG file
		echo "$TIMESTAMP - ERROR: We should never reach this point. Something is wrong in the script." >> $LOG
		# send output to QTS
		/sbin/log_tool -a "$TIMESTAMP - ERROR: We should never reach this point. Something is wrong in the script." -t 2 >&2
		exit 1
	fi

	# if one file does not exist or is not valid, exit
else
	# send output to the LOG file
	echo "$TIMESTAMP - ERROR: One of the files does not exist, has been moved or renamed." >&2
	# send output to LOG file
	echo "$TIMESTAMP - ERROR: One of the files does not exist, has been moved or renamed." >> $LOG
	# send output to QTS
	/sbin/log_tool -a "$TIMESTAMP - ERROR: One of the files does not exist, has been moved or renamed." -t 2 >&2
	exit 1
fi