- Proper process termination:

if interrupted with CTRL+C blocking socket calls will return with -1. Each device should call FairMQDevice::Shutdown() before ending the running state to close open sockets, otherwise the interrupt call itself will block.

- FIX: Update number of received messages for FairMQFileSink.
- Add ability to poll on outputs for FairMQPoller.

fairmq/FairMQDevice.h

@@ -88,6 +88,8 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
     vector<FairMQSocket*>* fPayloadInputs;
     vector<FairMQSocket*>* fPayloadOutputs;
 
+    FairMQSocket* fCommandSocket;
+
     int fLogIntervalInMs;
 
     FairMQTransportFactory* fTransportFactory;
@@ -98,6 +100,8 @@ class FairMQDevice : public FairMQStateMachine, public FairMQConfigurable
     virtual void Shutdown();
     virtual void InitOutput();
     virtual void InitInput();
+
+    virtual void Terminate();
 };
 
 #endif /* FAIRMQDEVICE_H_ */