eloop: Add eloop_sock_requeue()

This function can be used to re-build eloop socket tables after forking
for eloop implementations that need this.

Signed-off-by: Roy Marples <roy@marples.name>

hostapd/hostapd_cli.c

@@ -1444,7 +1444,7 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (daemonize && os_daemonize(pid_file))
+	if (daemonize && os_daemonize(pid_file) && eloop_sock_requeue())
 		return -1;
 
 	if (interactive)

hostapd/main.c

@@ -408,9 +408,16 @@ static int hostapd_global_run(struct hapd_interfaces *ifaces, int daemonize,
 	}
 #endif /* EAP_SERVER_TNC */
 
-	if (daemonize && os_daemonize(pid_file)) {
-		wpa_printf(MSG_ERROR, "daemon: %s", strerror(errno));
-		return -1;
+	if (daemonize) {
+		if (os_daemonize(pid_file)) {
+			wpa_printf(MSG_ERROR, "daemon: %s", strerror(errno));
+			return -1;
+		}
+		if (eloop_sock_requeue()) {
+			wpa_printf(MSG_ERROR, "eloop_sock_requeue: %s",
+				   strerror(errno));
+			return -1;
+		}
 	}
 
 	eloop_run();

src/utils/eloop.c

@@ -525,6 +525,12 @@ static void eloop_sock_table_dispatch(struct epoll_event *events, int nfds)
 #endif /* CONFIG_ELOOP_EPOLL */
 
 
+int eloop_sock_requeue(void)
+{
+	return 0;
+}
+
+
 static void eloop_sock_table_destroy(struct eloop_sock_table *table)
 {
 	if (table) {

src/utils/eloop.h

@@ -312,6 +312,14 @@ int eloop_register_signal_terminate(eloop_signal_handler handler,
 int eloop_register_signal_reconfig(eloop_signal_handler handler,
 				   void *user_data);
 
+/**
+ * eloop_sock_requeue - Requeue sockets
+ *
+ * Requeue sockets after forking because some implementations require this,
+ * such as epoll and kqueue.
+ */
+int eloop_sock_requeue(void);
+
 /**
  * eloop_run - Start the event loop
  *

src/utils/eloop_win.c

@@ -692,3 +692,9 @@ void eloop_wait_for_read_sock(int sock)
 	WSAEventSelect(sock, event, 0);
 	WSACloseEvent(event);
 }
+
+
+int eloop_sock_requeue(void)
+{
+	return 0;
+}

wpa_supplicant/wpa_cli.c

@@ -4441,7 +4441,7 @@ int main(int argc, char *argv[])
 			}
 		}
 
-		if (daemonize && os_daemonize(pid_file))
+		if (daemonize && os_daemonize(pid_file) && eloop_sock_requeue())
 			return -1;
 
 		if (action_file)

wpa_supplicant/wpa_priv.c

@@ -1128,7 +1128,7 @@ int main(int argc, char *argv[])
 		interfaces = iface;
 	}
 
-	if (daemonize && os_daemonize(pid_file))
+	if (daemonize && os_daemonize(pid_file) && eloop_sock_requeue())
 		goto out;
 
 	eloop_register_signal_terminate(wpa_priv_terminate, NULL);

wpa_supplicant/wpa_supplicant.c

@@ -5221,7 +5221,8 @@ int wpa_supplicant_run(struct wpa_global *global)
 	struct wpa_supplicant *wpa_s;
 
 	if (global->params.daemonize &&
-	    wpa_supplicant_daemon(global->params.pid_file))
+	    (wpa_supplicant_daemon(global->params.pid_file) ||
+	     eloop_sock_requeue()))
 		return -1;
 
 	if (global->params.wait_for_monitor) {