dbus: Use the shutdown procedure instead of l_main_quit

Move the calling of the *_shutdown functions from the signal handler to
a new public function, and use that function inside the DBus disconnect
handler to make sure resources are cleanly released.

src/dbus.c

@@ -31,6 +31,7 @@
 #include <ell/dbus-private.h>
 #include "src/dbus.h"
 #include "src/agent.h"
+#include "src/iwd.h"
 
 struct l_dbus *g_dbus = 0;
 
@@ -196,7 +197,7 @@ static void ready_callback(void *user_data)
 static void disconnect_callback(void *user_data)
 {
 	l_info("D-Bus disconnected, quitting...");
-	l_main_quit();
+	iwd_shutdown();
 }
 
 struct l_dbus *dbus_get_bus(void)

src/iwd.h

@@ -36,3 +36,5 @@ typedef void (*iwd_device_foreach_func)(struct device *, void *data);
 void __iwd_device_foreach(iwd_device_foreach_func func, void *user_data);
 
 const struct l_settings *iwd_get_config(void);
+
+void iwd_shutdown(void);

src/main.c

@@ -59,6 +59,14 @@ static void main_loop_quit(struct l_timeout *timeout, void *user_data)
 	l_main_quit();
 }
 
+void iwd_shutdown(void)
+{
+	dbus_shutdown();
+	netdev_shutdown();
+
+	timeout = l_timeout_create(1, main_loop_quit, NULL, NULL);
+}
+
 static void signal_handler(struct l_signal *signal, uint32_t signo,
 							void *user_data)
 {
@@ -66,11 +74,7 @@ static void signal_handler(struct l_signal *signal, uint32_t signo,
 	case SIGINT:
 	case SIGTERM:
 		l_info("Terminate");
-
-		dbus_shutdown();
-		netdev_shutdown();
-
-		timeout = l_timeout_create(1, main_loop_quit, NULL, NULL);
+		iwd_shutdown();
 		break;
 	}
 }