Fix unit tests leaking resources

This was harmless but none the less is not good style and needs fixing.

src/systemcmds/tests/test_mount.c

@@ -272,6 +272,7 @@ test_mount(int argc, char *argv[])
 			px4_close(fd);
 
 			if (ret) {
+				px4_close(cmd_fd);
 				PX4_ERR("UNLINKING FILE FAILED");
 				return 1;
 			}
@@ -283,7 +284,7 @@ test_mount(int argc, char *argv[])
 	fsync(fileno(stderr));
 	usleep(20000);
 
-
+	px4_close(cmd_fd);
 
 	/* we always reboot for the next test if we get here */
 	PX4_INFO("Iteration done, rebooting..");

src/systemcmds/tests/test_ppm_loopback.c

 /****************************************************************************
  *
- *   Copyright (c) 2012, 2013 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012, 2013, 2017 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
@@ -173,6 +173,8 @@ int test_ppm_loopback(int argc, char *argv[])
 		return ERROR;
 	}
 
+	close(servo_fd);
+
 	warnx("PPM LOOPBACK TEST PASSED SUCCESSFULLY!");
 
 	return 0;

src/systemcmds/tests/test_servo.c

 /****************************************************************************
  *
- *   Copyright (c) 2012, 2013 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012, 2013, 2017 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
@@ -116,5 +116,6 @@ int test_servo(int argc, char *argv[])
 	printf("Advancing channel 1 to 1800\n");
 	result = ioctl(fd, PWM_SERVO_SET(1), 1800);
 out:
+	close(fd);
 	return 0;
 }

src/systemcmds/tests/test_uart_baudchange.c

 /****************************************************************************
- * px4/sensors/test_gpio.c
  *
- *  Copyright (C) 2012 PX4 Development Team. All rights reserved.
- *            Lorenz Meier <lm@inf.ethz.ch>
+ *  Copyright (c) 2012, 2017 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
@@ -14,7 +12,7 @@
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
+ * 3. Neither the name PX4 nor the names of its contributors may be
  *    used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
@@ -33,9 +31,11 @@
  *
  ****************************************************************************/
 
-/****************************************************************************
- * Included Files
- ****************************************************************************/
+/**
+ * @file test_uart_baudchange.c
+ *
+ * @author Lorenz Meier <lorenz@px4.io>
+ */
 
 #include <px4_config.h>
 #include <px4_defines.h>

src/systemcmds/tests/test_uart_break.c

 /****************************************************************************
- * px4/sensors/test_uart_break.c
  *
- *  Copyright (C) 2012-2016 PX4 Development Team. All rights reserved.
- *            Lorenz Meier <lm@inf.ethz.ch>
- *            David Sidrane <david_s5@nscdg.com>
+ *  Copyright (c) 2012-2017 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
@@ -15,7 +12,7 @@
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
+ * 3. Neither the name PX4 nor the names of its contributors may be
  *    used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
@@ -34,9 +31,12 @@
  *
  ****************************************************************************/
 
-/****************************************************************************
- * Included Files
- ****************************************************************************/
+/**
+ * @file test_uart_break.c
+ *
+ * @author Lorenz Meier <lorenz@px4.io>
+ * @author David Sidrane <david_s5@nscdg.com>
+ */
 
 #include <px4_config.h>
 #include <px4_defines.h>
@@ -59,40 +59,6 @@
 #include <math.h>
 #include <float.h>
 
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: test_led
- ****************************************************************************/
-
 int test_uart_break(int argc, char *argv[])
 {
 	int uart2_nwrite0 = 0;

src/systemcmds/tests/test_uart_loopback.c

@@ -35,6 +35,7 @@
  * @file test_uart_loopback.c
  * Tests the uart outputs
  *
+ * @author Lorenz Meier <lorenz@px4.io>
  */
 
 #include <px4_config.h>
@@ -75,6 +76,10 @@ int test_uart_loopback(int argc, char *argv[])
 	}
 
 	if (uart5 < 0) {
+		if (uart2 > 0) {
+			close(uart2);
+		}
+
 		printf("ERROR opening UART5, aborting..\n");
 		exit(uart5);
 	}