- GOOSE subscriber example: added error handling when ethernet cannot be accessed

examples/goose_publisher/goose_publisher_example.c

@@ -69,7 +69,7 @@ main(int argc, char** argv)
 	    GoosePublisher_destroy(publisher);
 	}
 	else {
-	    printf("Failed to create GOOSE publisher. Reason can be that the Ethernet interface doesn't exist or you need root permissions.\n");
+	    printf("Failed to create GOOSE publisher. Reason can be that the Ethernet interface doesn't exist or root permission are required.\n");
 	}
 
 	LinkedList_destroyDeep(dataSetValues, (LinkedListValueDeleteFunction) MmsValue_delete);

examples/goose_subscriber/goose_subscriber_example.c

@@ -66,10 +66,15 @@ main(int argc, char** argv)
 
     GooseReceiver_start(receiver);
 
-    signal(SIGINT, sigint_handler);
+    if (GooseReceiver_isRunning(receiver)) {
+        signal(SIGINT, sigint_handler);
 
-    while (running) {
-        Thread_sleep(100);
+        while (running) {
+            Thread_sleep(100);
+        }
+    }
+    else {
+        printf("Failed to start GOOSE subscriber. Reason can be that the Ethernet interface doesn't exist or root permission are required.\n");
     }
 
     GooseReceiver_stop(receiver);

src/goose/goose_receiver.c

@@ -844,7 +844,9 @@ GooseReceiver_stop(GooseReceiver self)
     self->stop = true;
     self->running = false;
 
-    Thread_destroy(self->thread);
+    if (self->thread)
+        Thread_destroy(self->thread);
+
     self->stop = false;
 #endif
 }