#!/bin/bash
# version: 0.3.6-r8

FILE=$1
DIR=$(dirname ${FILE})
FILENAME=$(basename ${FILE})

# check if there are already protected file
# set counter to HIGHEST FILE +1
for oldpretected in $(find ${DIR} -iname "._cfg????_${FILENAME}" |
	sed -e "s:\(^.*/\)\(._cfg*_\)\(/.*$\):\1\2\3\%\2\%\3:" |
	sort -t'%' -k3 -k2 | cut -f1 -d'%')
do
	COUNTER=$(echo ${oldpretected}|cut -d_ -f2|sed -e "s:cfg::")
done

#if counter is zero than set to 0001 else to ${COUNTER}+1
if [ -z "${COUNTER}" ]
then
	COUNTER=0001
else
	#set COUNTER +1
	#this is a tricky one:
	#exp	COUNTER may be 0901
	#	exp ${COUNTER} + 1 is 902 NOT 0902

	COUNTER=${COUNTER/$(expr ${COUNTER} + 0)/$(expr ${COUNTER} + 0001)}
fi

echo ${COUNTER}