dhcpd(8) has
-n Only test configuration, do not run dhcpd.
rc_configtest() taken from other rc.d scripts.
Feedback? OK?
Index: dhcpd
===================================================================
RCS file: /cvs/src/etc/rc.d/dhcpd,v
retrieving revision 1.3
diff -u -p -r1.3 dhcpd
--- dhcpd 11 Jan 2018 19:52:12 -0000 1.3
+++ dhcpd 29 Sep 2022 20:52:28 -0000
@@ -6,6 +6,11 @@ daemon="/usr/sbin/dhcpd"
. /etc/rc.d/rc.subr
+rc_configtest() {
+ # use rc_exec here since daemon_flags may contain arguments with spaces
+ rc_exec "${daemon} -n ${daemon_flags}"
+}
+
rc_reload=NO
rc_pre() {
