#!/bin/bash

for i in "$@"; do
	file=$i

	filename=$(basename "$file")
	fingerprintfile="/tmp/$filename.md5"

	if [ ! -f $file ]; then
		echo "ERROR: $file does not exist - aborting"
	fi

	filemd5=`md5sum $file | cut -d " " -f1`

	if [ -z $filemd5 ]; then
		echo "The file $file is empty - aborting"
	fi

	if [ -f $fingerprintfile ]; then

		savedmd5=`cat $fingerprintfile`

		if [ -z $savedmd5 ]; then
			echo "The file $filename is empty - aborting"
		fi

		if [ "$savedmd5" = "$filemd5" ]; then
			echo "File $filename hasn't been changed"
		else
			echo "File $filename has been changed"
			echo $filemd5 > $fingerprintfile
		fi
	else
		echo $filemd5 > $fingerprintfile
		echo "File $filename is new one"
	fi

done