Framework to support disabling publications via IOCTL

src/drivers/device/cdev.cpp

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -38,6 +38,7 @@
  */
 
 #include "device.h"
+#include "drivers/drv_device.h"
 
 #include <sys/ioctl.h>
 #include <arch/irq.h>
@@ -93,6 +94,7 @@ CDev::CDev(const char *name,
 	Device(name, irq),
 	// public
 	// protected
+	_pub_blocked(false),
 	// private
 	_devname(devname),
 	_registered(false),
@@ -256,6 +258,13 @@ CDev::ioctl(struct file *filp, int cmd, unsigned long arg)
 	case DIOC_GETPRIV:
 		*(void **)(uintptr_t)arg = (void *)this;
 		return OK;
+		break;
+	case DEVIOCSPUBBLOCK:
+		_pub_blocked = (arg != 0);
+		break;
+	case DEVIOCGPUBBLOCK:
+		return _pub_blocked;
+		break;
 	}
 
 	return -ENOTTY;

src/drivers/device/device.cpp

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions

src/drivers/device/device.h

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -415,6 +415,8 @@ protected:
 	 */
 	virtual int unregister_class_devname(const char *class_devname, unsigned class_instance);
 
+	bool		_pub_blocked;		/**< true if publishing should be blocked */
+
 private:
 	static const unsigned _max_pollwaiters = 8;