Index: example.service_mk
==================================================================
--- example.service_mk
+++ example.service_mk
@@ -18,20 +18,27 @@
 # flags to prevent daemonizing
 DAEMON_example_FOREGROUND?=
 
 # group to run service as
 DAEMON_example_GROUP?=wheel
+
+# lower process priority by using `idprio`
+DAEMON_example_IDPRIO?=
 
 # kernel modules to load prior to service start
 DAEMON_example_MODULES?=
+
+# raise process priority by using `rtprio`
+# (IDPRIO setting takes precedence if set)
+DAEMON_example_RTPRIO?=
 
 # user to run service as
 DAEMON_example_USER?=root
 
 # extra commands to execute before starting service
-# ${_SERVICE} - starts after root mount appear
-# ${_EARLYSERVICE} - not required on early boot
+# ${_EARLYSERVICE} - starts after root mount appear
+# ${_SERVICE} - not required on early boot
 # you also can select specific starter by inheriting class by full name:
 # ${_(EARLY)?SERVICE(_(SVC|DAEMON|PLAIN))?}
 
 example: ${_EARLYSERVICE}
 	: run commands that should go before the service start

Index: starter.mk
==================================================================
--- starter.mk
+++ starter.mk
@@ -4,18 +4,29 @@
 
 _service_check: .USEBEFORE
 	# check whether service is enabled
 	if [ -z "$${DAEMON_$@_ENABLE}" -a -z "${FORCE}" ]; then \
 		exit 0 ;\
-	fi ;\
-	for CMD in ${DAEMON_$@_COMMAND}; do \
-		if [ -x $${CMD} ]; then \
-			export CMD ;\
+	fi
+	# check for first present executable
+	for COMMAND in ${DAEMON_$@_COMMAND}; do \
+		if [ -x $${COMMAND} ]; then \
+			export CMD="${COMMAND}" ;\
 			break ;\
 		fi ;\
-	done ;\
-	echo $${CMD}
+	done
+	# bail out if binary not found
+	if [ -z $${CMD} ]; then \
+		MRC:$@> Executable not found.
+		exit 0 ;\
+	fi
+	# check for rtprio/idprio
+	if [ -n "$${DAEMON_$@_IDPRIO}" ]; then \
+		export CMD="/usr/sbin/idprio $${DAEMON_$@_IDPRIO} $${CMD}" ;\
+	elif [ -n "$${DAEMON_$@_RTPRIO}" ]; then \
+		export CMD="/usr/sbin/rtprio $${DAEMON_$@_RTPRIO} $${CMD}" ;\
+	fi
 
 _service_pre: .USEBEFORE
 	# kldload modules if any
 	echo "MRC:$@> Starting service." ;\
 	if [ -n "${DAEMON_$@_MODULES}" ]; then \