Make sure that ntpd creates a pid file for the rc machinery to work.

http://mail-index.netbsd.org/current-users/2012/11/19/msg021518.html

etc/rc.d/ntpd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: ntpd,v 1.13 2004/08/13 18:08:03 mycroft Exp $
+# $NetBSD: ntpd,v 1.14 2012/12/04 16:38:40 prlw1 Exp $
 #
 
 # PROVIDE: ntpd
@@ -19,6 +19,7 @@ required_files="/etc/ntp.conf"
 
 ntpd_precmd()
 {
+	rc_flags="-p ${pidfile} $rc_flags"
 	if [ -z "$ntpd_chrootdir" ]; then
 		return 0;
 	fi

etc/rc.d/ppp

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: ppp,v 1.8 2004/10/11 15:00:51 christos Exp $
+# $NetBSD: ppp,v 1.9 2012/12/04 16:38:40 prlw1 Exp $
 #
 
 # PROVIDE: ppp
@@ -14,6 +14,7 @@
 $_rc_subr_loaded . /etc/rc.subr
 
 name="ppp"
+rcvar=$name
 start_cmd="ppp_start"
 stop_cmd="ppp_stop"
 sig_stop="-INT"
@@ -40,6 +41,8 @@ ppp_start()
 			fi
 		done
 		echo "."
+	else
+		warn "\${ppp_peers} is not set - pppd was not started."
 	fi
 }