### Funktionen ####################################

function xor()
{	local RES=($(echo "$1" | sed "s/../0x& /g"))
	shift 1
	while [[ "$1" ]]; do
		local ONE=($(echo "$1" | sed "s/../0x& /g"))
		local COUNT1=${#RES[@]}
		local COUNT2=${#ONE[@]}
		for (( i = 0; i < $COUNT1; i++ )); do
			RES[$i]=$((${ONE[$(( i % COUNT2 ))]:-0} ^ ${RES[$i]:-0}))
		done
		shift 1
	done
	printf "%02x" "${RES[@]}"
}

function already_mounted()
{
	# Ausgabe: gemountet = true = 0, nicht gemountet = false = 1
	local AUSGANG
	mount | grep -q " ${1} " && AUSGANG=0 || AUSGANG=1 
	return $AUSGANG
}

function mounter()
{
	# Ausgabe: konnte mounten: 0, konnte nicht mounten: 1, schon gemountet 2
	already_mounted "$4"
	ERR=$?
	if [ "$ERR" -eq 0 ]; then
		logger "openslx sharemapper: $3 already mounted."
		AUSGANG=2	
	else	
		case "$MOUNTER" in 
			nfs)	AUSGANG=0
				x=2
				while ! mount $1 $2 $3 $4 2>/dev/null 1>&2; do
					logger "openslx sharemapper: could not mount ${3} to ${4}, waited another $x seconds, retrying."
					sleep $x
					if [ "$x" -gt 6 ]; then
						AUSGANG=1
						logger "openslx sharemapper: timeout, could not mount ${3} to ${4}."
						break
					fi
					let x=x+2
				done
				[ "$AUSGANG" -eq 0 ] 	&& logger "openslx sharemapper: ${3} mounted to ${4} (nfs)."	# Todo: Schöner schreiben:)
				;;
			cifs)	AUSGANG=0
				x=2
				for VERSION in $CIFSVERSIONS; do
					AUSGANG=0
					while ! mount $1 vers="$VERSION",${2} $3 $4 2>/dev/null 1>&2; do
						logger "openslx sharemapper: could not mount ${3} to ${4}, waited another $x seconds, retrying."
						sleep $x
						if [ "$x" -gt 4 ]; then
							AUSGANG=1
							logger "openslx sharemapper: timeout, could not mount ${3} to ${4} cifs v${VERSION}."
							break
						fi
						let x=x+2
					done
					[ "$AUSGANG" -eq 0 ] && break
				done
				[ "$AUSGANG" -eq 0 ]    && logger "openslx sharemapper: ${3} mounted to ${4} (cifs $VERSION)."
				;;
			*)	logger "openslx sharemapper: unknown mounter ${MOUNTER}!"
				;;
		esac
	fi
	return $AUSGANG
}

### Funktionen Ende ###############################