#!/bin/sh
#
# ex:ts=4:sw=4:noet
#-*- mode: makefile; tab-width: 4; -*-

ETC_SERVICES="/etc/services"


check_service() {
	local SERVICE PORT PROTO COMMENT

	SERVICE=$1
	PORT=$2
	PROTO=$3
	COMMENT=$4

	# check
	OK=no
	HAS_SERVICE=no
	COUNT=1
	for i in $(grep ^${SERVICE} ${ETC_SERVICES}); do
		if [ ${COUNT} -eq 1 ] && [ x"${i}" = x"${SERVICE}" ]; then
			HAS_SERVICE=yes
			echo " already in ${ETC_SERVICES}: ${SERVICE}"

		elif [ ${COUNT} -eq 2 ] && [ "${HAS_SERVICE}" = "yes" ] && \
			[ x"${i}" = x"${PORT}/${PROTO}" ]; then
			OK=yes
			break
		fi
		COUNT=$(( ${COUNT} + 1 ))
	done
	# add an entry for SERVICE to /etc/services
	if [ "${OK}" = "no" ]; then
		echo "==> add entry \"${SERVICE} ${PORT}/${PROTO}\""
		(
			grep -v -e "^${SERVICE}.*${PORT}/${PROTO}" ${ETC_SERVICES}
			echo "${SERVICE}	${PORT}/${PROTO}   # ${COMMENT}"
		) >> ${ETC_SERVICES}.new
		mv ${ETC_SERVICES}.new ${ETC_SERVICES}
	fi
}

# always add service entries
echo "Checking ${ETC_SERVICES} for missing spamd service entries"
[ ! -f ${ETC_SERVICES} ] && echo "==> cannot find ${ETC_SERVICES} ... => exit" &&  exit 1
check_service spamd 8025 tcp "spamd(8)"
check_service spamd-sync 8025 udp "spamd(8) synchronisation"
check_service spamd-cfg 8026 tcp "spamd(8) configuration"