initd: implement handling of socket requests

Actually process requests and send an answer to status inquiries.

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>

initd/init.h

@@ -67,6 +67,9 @@ void supervisor_init(void);
 
 bool supervisor_process_queues(void);
 
+void supervisor_answer_status_request(int fd, const void *dest_addr,
+				      size_t addrlen);
+
 /********** signal_<platform>.c **********/
 
 /*

initd/main.c

@@ -43,6 +43,27 @@ static void handle_signal(void)
 
 static void handle_request(void)
 {
+	struct sockaddr_un addr;
+	init_request_t rq;
+	socklen_t addrlen;
+	ssize_t ret;
+retry:
+	memset(&rq, 0, sizeof(rq));
+	addrlen = sizeof(addr);
+	ret = recvfrom(sockfd, &rq, sizeof(rq), MSG_DONTWAIT | MSG_TRUNC,
+		       &addr, &addrlen);
+
+	if (ret < 0 && errno == EINTR)
+		goto retry;
+
+	if ((size_t)ret < sizeof(rq))
+		return;
+
+	switch (rq.rq) {
+	case EIR_STATUS:
+		supervisor_answer_status_request(sockfd, &addr, addrlen);
+		break;
+	}
 }
 
 void target_completed(int target)

initd/supervisor.c

@@ -167,3 +167,29 @@ bool supervisor_process_queues(void)
 		target_completed(target);
 	return true;
 }
+
+static int send_svc_list(int fd, const void *dst, size_t addrlen,
+			 E_SERVICE_STATE state, service_t *list)
+{
+	while (list != NULL) {
+		if (init_socket_send_status(fd, dst, addrlen, state, list))
+			return -1;
+
+		list = list->next;
+	}
+
+	return 0;
+}
+
+void supervisor_answer_status_request(int fd, const void *dst, size_t addrlen)
+{
+	if (send_svc_list(fd, dst, addrlen, ESS_RUNNING, running))
+		return;
+	if (send_svc_list(fd, dst, addrlen, ESS_EXITED, completed))
+		return;
+	if (send_svc_list(fd, dst, addrlen, ESS_ENQUEUED, queue))
+		return;
+	if (send_svc_list(fd, dst, addrlen, ESS_ENQUEUED, terminated))
+		return;
+	init_socket_send_status(fd, dst, addrlen, ESS_NONE, NULL);
+}