[usb-moded] Do not send signals when disconnected and handling -HUP. …

…Fixes: JB#18884

We reread the configuration data after recieving SIGHUP. To make sure this happens
cleanly we set ourselves disconnected. However if we are disconnected this
generates some spurious signals. By using a silent function for this use case
we can avoid it.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

src/usb_moded.c

@@ -84,6 +84,7 @@ static GList *modelist;
 
 /* static helper functions */
 static gboolean set_disconnected(gpointer data);
+static gboolean set_disconnected_silent(gpointer data);
 static void usb_moded_init(void);
 static gboolean charging_fallback(gpointer data);
 static void usage(void);
@@ -163,6 +164,24 @@ static gboolean set_disconnected(gpointer data)
   return FALSE;
 }
 
+/* set disconnected without sending signals. */
+static gboolean set_disconnected_silent(gpointer data)
+{
+if(!get_usb_connection_state())
+        {
+                log_debug("Resetting connection data after HUP\n");
+                /* unload modules and general cleanup if not charging */
+                if(strcmp(get_usb_mode(), MODE_CHARGING))
+                        usb_moded_mode_cleanup(get_usb_module());
+                /* Nothing else as we do not need to do anything for cleaning up charging mode */
+                usb_moded_module_cleanup(get_usb_module());
+                set_usb_mode(MODE_UNDEFINED);
+                charging_mode_set = FALSE;
+        }
+  return FALSE;
+
+}
+
 /** set and track charger state
  *
  */
@@ -623,7 +642,7 @@ static void sigint_handler(int signum)
   {
 	/* clean up current mode */
 	data = get_usb_mode_data();
-	set_disconnected(data);
+	set_disconnected_silent(data);
 	/* clear existing data to be sure */
 	set_usb_mode_data(NULL);
 	/* free and read in modelist again */
@@ -941,7 +960,7 @@ int main(int argc, char* argv[])
 	}
 #endif /* SYSTEMD */
 
-    send_supported_modes_signal();
+        send_supported_modes_signal();
 
 	/* init succesful, run main loop */
 	result = EXIT_SUCCESS;