Track run/tasks, should run at least once per declared runlevel

This patch adds a 'once' counter to the svc_t for run/task jobs.  This
counter is incremented when Finit calls service_start() and is reset on
runlevel changes.

Also, at the end of a runlevel each run/task have their state reset to
SVC_HALTED_STATE so they can be launched again for the new runlevel, if
so declared.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/service.c

@@ -274,7 +274,7 @@ static int service_start(svc_t *svc)
 
 		if (svc->inetd.cmd)
 			status = svc->inetd.cmd(svc->inetd.type);
-		else if (svc->type & SVC_TYPE_RUNTASK)
+		else if (svc_is_runtask(svc))
 			status = exec_runtask(svc->cmd, args);
 		else
 			status = execv(svc->cmd, args);
@@ -920,6 +920,11 @@ restart:
 				svc_set_state(svc, SVC_STOPPING_STATE);
 				break;
 			}
+
+			if (svc_is_runtask(svc)) {
+				svc->once++;
+				break;
+			}
 		}
 
 		cond = cond_get_agg(svc->cond);
@@ -995,6 +1000,24 @@ void service_step_all(int types)
 	svc_foreach_type(types, service_step);
 }
 
+/**
+ * svc_clean_runtask - Clear once flag of runtasks
+ *
+ * XXX: runtasks should be stopped before calling this
+ */
+void service_runtask_clean(void)
+{
+	svc_t *svc;
+
+	for (svc = svc_iterator(1); svc; svc = svc_iterator(0)) {
+		if (!svc_is_runtask(svc))
+			continue;
+		svc->once = 0;
+		if (svc->state == SVC_DONE_STATE)
+			svc_set_state(svc, SVC_HALTED_STATE);
+	}
+}
+
 /**
  * Local Variables:
  *  indent-tabs-mode: t