Refactoring for simplicity, no functional change:

* Instead of nesting subshells, perform a linear series of operations
and bail out as soon as one of them fails.
* Rename rc_print to rc_exit, let it calculate the exit code itself
and let it exit, considerably simplifying error handling; new name
suggested by sthen@.
OK ajacoutot@ sthen@

src/etc/rc.d/rc.subr

@@ -1,4 +1,4 @@
-#	$OpenBSD: rc.subr,v 1.37 2011/06/10 08:43:26 ajacoutot Exp $
+#	$OpenBSD: rc.subr,v 1.38 2011/06/20 21:26:27 schwarze Exp $
 
 # Default functions and variables used by rc.d(8) scripts.
 
@@ -31,11 +31,10 @@ rc_do() {
 	fi
 }
 
-rc_print() {
-	_ret=$?
+rc_exit() {
 	[ -z "${INRC}" -o X"$1" != X"ok" ] && _pfix="($1)"
 	echo ${INRC:+'-n'} "${INRC:+ }${_name}${_pfix}"
-	return ${_ret}
+	[ X"$1" = X"ok" ] && exit 0 || exit 1
 }
 
 rc_wait() {
@@ -75,44 +74,34 @@ rc_cmd() {
 		rc_do rc_check
 		;;
 	start)
-		rc_do rc_check || \
-			(
+		rc_do rc_check && exit 0
+		while true; do  # no real loop, only needed to break
 			if type rc_pre >/dev/null; then
-				rc_do rc_pre
+				rc_do rc_pre || break
 			fi
-			[ $? -eq 0 ] && rc_do rc_start
-			[ $? -eq 0 ] && \
-				if [ -n "${_bg}" ]; then
-					sleep 1 && rc_do rc_wait start
-				else
-					: # do nothing
-				fi
-			[ $? -eq 0 ] && \
-				rc_print ok || \
-					(
-					type rc_post >/dev/null && rc_do rc_post
-					rc_print failed
-					return 1
-					)
-			)
+			rc_do rc_start || break
+			if [ -n "${_bg}" ]; then
+				sleep 1
+				rc_do rc_wait start || break
+			fi
+			rc_exit ok
+		done
+		# handle failure
+		type rc_post >/dev/null && rc_do rc_post
+		rc_exit failed
 		;;
 	stop)
-		if rc_do rc_check; then rc_do rc_stop || \
-			( rc_print failed ) && \
-			(
-				rc_do rc_wait stop &&
-				(
-				if type rc_post >/dev/null; then \
-					rc_do rc_post
-				fi
-				) && rc_print ok || rc_print failed
-			)
-		else
-			return 0
+		rc_do rc_check || exit 0
+		rc_do rc_stop || rc_exit failed
+		rc_do rc_wait stop || rc_exit failed
+		if type rc_post >/dev/null; then \
+			rc_do rc_post || rc_exit failed
 		fi
+		rc_exit ok
 		;;
 	reload)
-		rc_do rc_check && ( rc_do rc_reload || rc_print failed )
+		rc_do rc_check || exit 1
+		rc_do rc_reload || rc_exit failed
 		;;
 	restart)
 		/etc/rc.d/${_name} stop && /etc/rc.d/${_name} start