Merge branch 'master' into acro2

7 files changed, 168 insertions, 105 deletions

diff --git a/src/modules/commander/accelerometer_calibration.cpp b/src/modules/commander/accelerometer_calibration.cpp
index 36b75dd58..1cbdf9bf8 100644
--- a/src/modules/commander/accelerometer_calibration.cpp
+++ b/src/modules/commander/accelerometer_calibration.cpp
@@ -311,7 +311,7 @@ int do_accel_calibration_measurements(int mavlink_fd, float accel_offs[3], float
 				 (double)accel_ref[orient][2]);
 
 		data_collected[orient] = true;
-		tune_neutral();
+		tune_neutral(true);
 	}
 
 	close(sensor_combined_sub);
diff --git a/src/modules/commander/airspeed_calibration.cpp b/src/modules/commander/airspeed_calibration.cpp
index 1809f9688..6039d92a7 100644
--- a/src/modules/commander/airspeed_calibration.cpp
+++ b/src/modules/commander/airspeed_calibration.cpp
@@ -142,7 +142,7 @@ int do_airspeed_calibration(int mavlink_fd)
 		}
 
 		mavlink_log_info(mavlink_fd, CAL_DONE_MSG, sensor_name);
-		tune_neutral();
+		tune_neutral(true);
 		close(diff_pres_sub);
 		return OK;
 
diff --git a/src/modules/commander/commander.cpp b/src/modules/commander/commander.cpp
index 4a47603f9..9c1642ac2 100644
--- a/src/modules/commander/commander.cpp
+++ b/src/modules/commander/commander.cpp
@@ -152,6 +152,7 @@ static uint64_t last_print_mode_reject_time = 0;
 static bool on_usb_power = false;
 
 static float takeoff_alt = 5.0f;
+static int parachute_enabled = 0;
 
 static struct vehicle_status_s status;
 static struct actuator_armed_s armed;
@@ -429,7 +430,7 @@ bool handle_command(struct vehicle_status_s *status, const struct safety_s *safe
 			arming_res = TRANSITION_NOT_CHANGED;
 
 			if (base_mode & MAV_MODE_FLAG_SAFETY_ARMED) {
-				if ((safety->safety_switch_available && !safety->safety_off) && status->hil_state == HIL_STATE_OFF) {
+				if (safety->safety_switch_available && !safety->safety_off && status->hil_state == HIL_STATE_OFF) {
 					print_reject_arm("NOT ARMING: Press safety switch first.");
 					arming_res = TRANSITION_DENIED;
 
@@ -515,7 +516,7 @@ bool handle_command(struct vehicle_status_s *status, const struct safety_s *safe
 			transition_result_t arming_res = TRANSITION_NOT_CHANGED;
 
 			if (!armed->armed && ((int)(cmd->param1 + 0.5f)) == 1) {
-				if (safety->safety_switch_available && !safety->safety_off) {
+				if (safety->safety_switch_available && !safety->safety_off && status->hil_state == HIL_STATE_OFF) {
 					print_reject_arm("NOT ARMING: Press safety switch first.");
 					arming_res = TRANSITION_DENIED;
 
@@ -563,7 +564,9 @@ bool handle_command(struct vehicle_status_s *status, const struct safety_s *safe
 		/* Flight termination */
 	case VEHICLE_CMD_DO_SET_SERVO: { //xxx: needs its own mavlink command
 
-			if (armed->armed && cmd->param3 > 0.5) { //xxx: for safety only for now, param3 is unused by VEHICLE_CMD_DO_SET_SERVO
+			//XXX: to enable the parachute, a param needs to be set
+			//xxx: for safety only for now, param3 is unused by VEHICLE_CMD_DO_SET_SERVO
+			if (armed->armed && cmd->param3 > 0.5 && parachute_enabled) {
 				transition_result_t failsafe_res = failsafe_state_transition(status, FAILSAFE_STATE_TERMINATION);
 				result = VEHICLE_CMD_RESULT_ACCEPTED;
 				ret = true;
@@ -607,7 +610,6 @@ int commander_thread_main(int argc, char *argv[])
 	/* not yet initialized */
 	commander_initialized = false;
 
-	bool battery_tune_played = false;
 	bool arm_tune_played = false;
 
 	/* set parameters */
@@ -615,6 +617,7 @@ int commander_thread_main(int argc, char *argv[])
 	param_t _param_system_id = param_find("MAV_SYS_ID");
 	param_t _param_component_id = param_find("MAV_COMP_ID");
 	param_t _param_takeoff_alt = param_find("NAV_TAKEOFF_ALT");
+	param_t _param_enable_parachute = param_find("NAV_PARACHUTE_EN");
 
 	/* welcome user */
 	warnx("starting");
@@ -861,10 +864,10 @@ int commander_thread_main(int argc, char *argv[])
 
 				/* re-check RC calibration */
 				rc_calibration_ok = (OK == rc_calibration_check(mavlink_fd));
-
-				/* navigation parameters */
-				param_get(_param_takeoff_alt, &takeoff_alt);
 			}
+			/* navigation parameters */
+			param_get(_param_takeoff_alt, &takeoff_alt);
+			param_get(_param_enable_parachute, &parachute_enabled);
 		}
 
 		orb_check(sp_man_sub, &updated);
@@ -899,11 +902,13 @@ int commander_thread_main(int argc, char *argv[])
 		if (updated) {
 			orb_copy(ORB_ID(safety), safety_sub, &safety);
 
-			// XXX this would be the right approach to do it, but do we *WANT* this?
-			// /* disarm if safety is now on and still armed */
-			// if (safety.safety_switch_available && !safety.safety_off) {
-			// 	(void)arming_state_transition(&status, &safety, ARMING_STATE_STANDBY, &armed);
-			// }
+			/* disarm if safety is now on and still armed */
+			if (status.hil_state == HIL_STATE_OFF && safety.safety_switch_available && !safety.safety_off && armed.armed) {
+				arming_state_t new_arming_state = (status.arming_state == ARMING_STATE_ARMED ? ARMING_STATE_STANDBY : ARMING_STATE_STANDBY_ERROR);
+				if (TRANSITION_CHANGED == arming_state_transition(&status, &safety, new_arming_state, &armed)) {
+					mavlink_log_info(mavlink_fd, "[cmd] DISARMED by safety switch");
+				}
+			}
 		}
 
 		/* update global position estimate */
@@ -958,7 +963,7 @@ int commander_thread_main(int argc, char *argv[])
 			orb_copy(ORB_ID(battery_status), battery_sub, &battery);
 
 			/* only consider battery voltage if system has been running 2s and battery voltage is valid */
-			if (hrt_absolute_time() > start_time + 2000000 && battery.voltage_filtered_v > 0.0f) {
+			if (status.hil_state == HIL_STATE_OFF && hrt_absolute_time() > start_time + 2000000 && battery.voltage_filtered_v > 0.0f) {
 				status.battery_voltage = battery.voltage_filtered_v;
 				status.battery_current = battery.current_a;
 				status.condition_battery_voltage_valid = true;
@@ -1021,14 +1026,12 @@ int commander_thread_main(int argc, char *argv[])
 			mavlink_log_critical(mavlink_fd, "#audio: WARNING: LOW BATTERY");
 			status.battery_warning = VEHICLE_BATTERY_WARNING_LOW;
 			status_changed = true;
-			battery_tune_played = false;
 
 		} else if (status.condition_battery_voltage_valid && status.battery_remaining < 0.1f && !critical_battery_voltage_actions_done && low_battery_voltage_actions_done) {
 			/* critical battery voltage, this is rather an emergency, change state machine */
 			critical_battery_voltage_actions_done = true;
 			mavlink_log_critical(mavlink_fd, "#audio: EMERGENCY: CRITICAL BATTERY");
 			status.battery_warning = VEHICLE_BATTERY_WARNING_CRITICAL;
-			battery_tune_played = false;
 
 			if (armed.armed) {
 				arming_state_transition(&status, &safety, ARMING_STATE_ARMED_ERROR, &armed);
@@ -1102,7 +1105,7 @@ int commander_thread_main(int argc, char *argv[])
 
 				/* mark home position as set */
 				status.condition_home_position_valid = true;
-				tune_positive();
+				tune_positive(true);
 			}
 		}
 
@@ -1153,7 +1156,7 @@ int commander_thread_main(int argc, char *argv[])
 			if (status.arming_state == ARMING_STATE_STANDBY &&
 			    sp_man.yaw > STICK_ON_OFF_LIMIT && sp_man.throttle < STICK_THRUST_RANGE * 0.1f) {
 				if (stick_on_counter > STICK_ON_OFF_COUNTER_LIMIT) {
-					if (safety.safety_switch_available && !safety.safety_off) {
+					if (safety.safety_switch_available && !safety.safety_off && status.hil_state == HIL_STATE_OFF) {
 						print_reject_arm("NOT ARMING: Press safety switch first.");
 
 					} else if (status.main_state != MAIN_STATE_MANUAL) {
@@ -1197,8 +1200,9 @@ int commander_thread_main(int argc, char *argv[])
 			/* evaluate the main state machine according to mode switches */
 			res = set_main_state_rc(&status);
 
+			/* play tune on mode change only if armed, blink LED always */
 			if (res == TRANSITION_CHANGED) {
-				tune_positive();
+				tune_positive(armed.armed);
 
 			} else if (res == TRANSITION_DENIED) {
 				/* DENIED here indicates bug in the commander */
@@ -1252,9 +1256,9 @@ int commander_thread_main(int argc, char *argv[])
 
 		// TODO remove this hack
 		/* flight termination in manual mode if assisted switch is on easy position */
-		if (!status.is_rotary_wing && armed.armed && status.main_state == MAIN_STATE_MANUAL && sp_man.assisted_switch > STICK_ON_OFF_LIMIT) {
+		if (!status.is_rotary_wing && parachute_enabled && armed.armed && status.main_state == MAIN_STATE_MANUAL && sp_man.assisted_switch > STICK_ON_OFF_LIMIT) {
 			if (TRANSITION_CHANGED == failsafe_state_transition(&status, FAILSAFE_STATE_TERMINATION)) {
-				tune_positive();
+				tune_positive(armed.armed);
 			}
 		}
 
@@ -1309,26 +1313,23 @@ int commander_thread_main(int argc, char *argv[])
 		/* play arming and battery warning tunes */
 		if (!arm_tune_played && armed.armed && (!safety.safety_switch_available || (safety.safety_switch_available && safety.safety_off))) {
 			/* play tune when armed */
-			if (tune_arm() == OK)
-				arm_tune_played = true;
-
-		} else if (status.battery_warning == VEHICLE_BATTERY_WARNING_LOW) {
-			/* play tune on battery warning */
-			if (tune_low_bat() == OK)
-				battery_tune_played = true;
+			set_tune(TONE_ARMING_WARNING_TUNE);
+			arm_tune_played = true;
 
 		} else if (status.battery_warning == VEHICLE_BATTERY_WARNING_CRITICAL) {
 			/* play tune on battery critical */
-			if (tune_critical_bat() == OK)
-				battery_tune_played = true;
+			set_tune(TONE_BATTERY_WARNING_FAST_TUNE);
+
+		} else if (status.battery_warning == VEHICLE_BATTERY_WARNING_LOW || status.failsafe_state != FAILSAFE_STATE_NORMAL) {
+			/* play tune on battery warning or failsafe */
+			set_tune(TONE_BATTERY_WARNING_SLOW_TUNE);
 
-		} else if (battery_tune_played) {
-			tune_stop();
-			battery_tune_played = false;
+		} else {
+			set_tune(TONE_STOP_TUNE);
 		}
 
 		/* reset arm_tune_played when disarmed */
-		if (status.arming_state != ARMING_STATE_ARMED || (safety.safety_switch_available && !safety.safety_off)) {
+		if (!armed.armed || (safety.safety_switch_available && !safety.safety_off)) {
 			arm_tune_played = false;
 		}
 
@@ -1423,11 +1424,8 @@ control_status_leds(vehicle_status_s *status, const actuator_armed_s *actuator_a
 
 		if (set_normal_color) {
 			/* set color */
-			if (status->battery_warning != VEHICLE_BATTERY_WARNING_NONE) {
-				if (status->battery_warning == VEHICLE_BATTERY_WARNING_LOW) {
-					rgbled_set_color(RGBLED_COLOR_AMBER);
-				}
-
+			if (status->battery_warning == VEHICLE_BATTERY_WARNING_LOW || status->failsafe_state != FAILSAFE_STATE_NORMAL) {
+				rgbled_set_color(RGBLED_COLOR_AMBER);
 				/* VEHICLE_BATTERY_WARNING_CRITICAL handled as ARMING_STATE_ARMED_ERROR / ARMING_STATE_STANDBY_ERROR */
 
 			} else {
@@ -1720,15 +1718,9 @@ print_reject_mode(struct vehicle_status_s *status, const char *msg)
 		sprintf(s, "#audio: REJECT %s", msg);
 		mavlink_log_critical(mavlink_fd, s);
 
-		// only buzz if armed, because else we're driving people nuts indoors
-		// they really need to look at the leds as well.
-		if (status->arming_state == ARMING_STATE_ARMED) {
-			tune_negative();
-		} else {
-
-			// Always show the led indication
-			led_negative();
-		}
+		/* only buzz if armed, because else we're driving people nuts indoors
+		they really need to look at the leds as well. */
+		tune_negative(armed.armed);
 	}
 }
 
@@ -1742,7 +1734,7 @@ print_reject_arm(const char *msg)
 		char s[80];
 		sprintf(s, "#audio: %s", msg);
 		mavlink_log_critical(mavlink_fd, s);
-		tune_negative();
+		tune_negative(true);
 	}
 }
 
@@ -1750,27 +1742,27 @@ void answer_command(struct vehicle_command_s &cmd, enum VEHICLE_CMD_RESULT resul
 {
 	switch (result) {
 	case VEHICLE_CMD_RESULT_ACCEPTED:
-			tune_positive();
+			tune_positive(true);
 		break;
 
 	case VEHICLE_CMD_RESULT_DENIED:
 		mavlink_log_critical(mavlink_fd, "#audio: command denied: %u", cmd.command);
-		tune_negative();
+		tune_negative(true);
 		break;
 
 	case VEHICLE_CMD_RESULT_FAILED:
 		mavlink_log_critical(mavlink_fd, "#audio: command failed: %u", cmd.command);
-		tune_negative();
+		tune_negative(true);
 		break;
 
 	case VEHICLE_CMD_RESULT_TEMPORARILY_REJECTED:
 		mavlink_log_critical(mavlink_fd, "#audio: command temporarily rejected: %u", cmd.command);
-		tune_negative();
+		tune_negative(true);
 		break;
 
 	case VEHICLE_CMD_RESULT_UNSUPPORTED:
 		mavlink_log_critical(mavlink_fd, "#audio: command unsupported: %u", cmd.command);
-		tune_negative();
+		tune_negative(true);
 		break;
 
 	default:
@@ -1910,9 +1902,9 @@ void *commander_low_prio_loop(void *arg)
 				}
 
 				if (calib_ret == OK)
-					tune_positive();
+					tune_positive(true);
 				else
-					tune_negative();
+					tune_negative(true);
 
 				arming_state_transition(&status, &safety, ARMING_STATE_STANDBY, &armed);
 
diff --git a/src/modules/commander/commander_helper.cpp b/src/modules/commander/commander_helper.cpp
index 033e7dc88..fe6c9bfaa 100644
--- a/src/modules/commander/commander_helper.cpp
+++ b/src/modules/commander/commander_helper.cpp
@@ -45,6 +45,7 @@
 #include <stdbool.h>
 #include <fcntl.h>
 #include <math.h>
+#include <string.h>
 
 #include <uORB/uORB.h>
 #include <uORB/topics/vehicle_status.h>
@@ -81,11 +82,22 @@ bool is_rotary_wing(const struct vehicle_status_s *current_status)
 	       || (current_status->system_type == VEHICLE_TYPE_COAXIAL);
 }
 
-static int buzzer;
-static hrt_abstime blink_msg_end;
+static int buzzer = -1;
+static hrt_abstime blink_msg_end = 0;	// end time for currently blinking LED message, 0 if no blink message
+static hrt_abstime tune_end = 0;		// end time of currently played tune, 0 for repeating tunes or silence
+static int tune_current = TONE_STOP_TUNE;		// currently playing tune, can be interrupted after tune_end
+static unsigned int tune_durations[TONE_NUMBER_OF_TUNES];
 
 int buzzer_init()
 {
+	tune_end = 0;
+	tune_current = 0;
+	memset(tune_durations, 0, sizeof(tune_durations));
+	tune_durations[TONE_NOTIFY_POSITIVE_TUNE] = 800000;
+	tune_durations[TONE_NOTIFY_NEGATIVE_TUNE] = 900000;
+	tune_durations[TONE_NOTIFY_NEUTRAL_TUNE] = 500000;
+	tune_durations[TONE_ARMING_WARNING_TUNE] = 3000000;
+
 	buzzer = open(TONEALARM_DEVICE_PATH, O_WRONLY);
 
 	if (buzzer < 0) {
@@ -101,58 +113,60 @@ void buzzer_deinit()
 	close(buzzer);
 }
 
-void tune_error()
-{
-	ioctl(buzzer, TONE_SET_ALARM, TONE_ERROR_TUNE);
+void set_tune(int tune) {
+	unsigned int new_tune_duration = tune_durations[tune];
+	/* don't interrupt currently playing non-repeating tune by repeating */
+	if (tune_end == 0 || new_tune_duration != 0 || hrt_absolute_time() > tune_end) {
+		/* allow interrupting current non-repeating tune by the same tune */
+		if (tune != tune_current || new_tune_duration != 0) {
+			ioctl(buzzer, TONE_SET_ALARM, tune);
+		}
+		tune_current = tune;
+		if (new_tune_duration != 0) {
+			tune_end = hrt_absolute_time() + new_tune_duration;
+		} else {
+			tune_end = 0;
+		}
+	}
 }
 
-void tune_positive()
+/**
+ * Blink green LED and play positive tune (if use_buzzer == true).
+ */
+void tune_positive(bool use_buzzer)
 {
 	blink_msg_end = hrt_absolute_time() + BLINK_MSG_TIME;
 	rgbled_set_color(RGBLED_COLOR_GREEN);
 	rgbled_set_mode(RGBLED_MODE_BLINK_FAST);
-	ioctl(buzzer, TONE_SET_ALARM, TONE_NOTIFY_POSITIVE_TUNE);
+	if (use_buzzer) {
+		set_tune(TONE_NOTIFY_POSITIVE_TUNE);
+	}
 }
 
-void tune_neutral()
+/**
+ * Blink white LED and play neutral tune (if use_buzzer == true).
+ */
+void tune_neutral(bool use_buzzer)
 {
 	blink_msg_end = hrt_absolute_time() + BLINK_MSG_TIME;
 	rgbled_set_color(RGBLED_COLOR_WHITE);
 	rgbled_set_mode(RGBLED_MODE_BLINK_FAST);
-	ioctl(buzzer, TONE_SET_ALARM, TONE_NOTIFY_NEUTRAL_TUNE);
-}
-
-void tune_negative()
-{
-	led_negative();
-	ioctl(buzzer, TONE_SET_ALARM, TONE_NOTIFY_NEGATIVE_TUNE);
+	if (use_buzzer) {
+		set_tune(TONE_NOTIFY_NEUTRAL_TUNE);
+	}
 }
 
-void led_negative()
+/**
+ * Blink red LED and play negative tune (if use_buzzer == true).
+ */
+void tune_negative(bool use_buzzer)
 {
 	blink_msg_end = hrt_absolute_time() + BLINK_MSG_TIME;
 	rgbled_set_color(RGBLED_COLOR_RED);
 	rgbled_set_mode(RGBLED_MODE_BLINK_FAST);
-}
-
-int tune_arm()
-{
-	return ioctl(buzzer, TONE_SET_ALARM, TONE_ARMING_WARNING_TUNE);
-}
-
-int tune_low_bat()
-{
-	return ioctl(buzzer, TONE_SET_ALARM, TONE_BATTERY_WARNING_SLOW_TUNE);
-}
-
-int tune_critical_bat()
-{
-	return ioctl(buzzer, TONE_SET_ALARM, TONE_BATTERY_WARNING_FAST_TUNE);
-}
-
-void tune_stop()
-{
-	ioctl(buzzer, TONE_SET_ALARM, TONE_STOP_TUNE);
+	if (use_buzzer) {
+		set_tune(TONE_NOTIFY_NEGATIVE_TUNE);
+	}
 }
 
 int blink_msg_state()
@@ -161,6 +175,7 @@ int blink_msg_state()
 		return 0;
 
 	} else if (hrt_absolute_time() > blink_msg_end) {
+		blink_msg_end = 0;
 		return 2;
 
 	} else {
@@ -168,8 +183,8 @@ int blink_msg_state()
 	}
 }
 
-static int leds;
-static int rgbleds;
+static int leds = -1;
+static int rgbleds = -1;
 
 int led_init()
 {
diff --git a/src/modules/commander/commander_helper.h b/src/modules/commander/commander_helper.h
index af25a5e97..e75f2592f 100644
--- a/src/modules/commander/commander_helper.h
+++ b/src/modules/commander/commander_helper.h
@@ -54,16 +54,10 @@ bool is_rotary_wing(const struct vehicle_status_s *current_status);
 int buzzer_init(void);
 void buzzer_deinit(void);
 
-void tune_error(void);
-void tune_positive(void);
-void tune_neutral(void);
-void tune_negative(void);
-int tune_arm(void);
-int tune_low_bat(void);
-int tune_critical_bat(void);
-void tune_stop(void);
-
-void led_negative();
+void set_tune(int tune);
+void tune_positive(bool use_buzzer);
+void tune_neutral(bool use_buzzer);
+void tune_negative(bool use_buzzer);
 
 int blink_msg_state();
 
diff --git a/src/modules/commander/commander_params.c b/src/modules/commander/commander_params.c
index d3155f7bf..80ca68f21 100644
--- a/src/modules/commander/commander_params.c
+++ b/src/modules/commander/commander_params.c
@@ -48,7 +48,39 @@
 PARAM_DEFINE_FLOAT(TRIM_ROLL, 0.0f);
 PARAM_DEFINE_FLOAT(TRIM_PITCH, 0.0f);
 PARAM_DEFINE_FLOAT(TRIM_YAW, 0.0f);
+
+/**
+ * Empty cell voltage.
+ *
+ * Defines the voltage where a single cell of the battery is considered empty.
+ *
+ * @group Battery Calibration
+ */
 PARAM_DEFINE_FLOAT(BAT_V_EMPTY, 3.4f);
+
+/**
+ * Full cell voltage.
+ *
+ * Defines the voltage where a single cell of the battery is considered full.
+ *
+ * @group Battery Calibration
+ */
 PARAM_DEFINE_FLOAT(BAT_V_FULL, 3.9f);
+
+/**
+ * Number of cells.
+ *
+ * Defines the number of cells the attached battery consists of.
+ *
+ * @group Battery Calibration
+ */
 PARAM_DEFINE_INT32(BAT_N_CELLS, 3);
+
+/**
+ * Battery capacity.
+ *
+ * Defines the capacity of the attached battery.
+ *
+ * @group Battery Calibration
+ */
 PARAM_DEFINE_FLOAT(BAT_CAPACITY, -1.0f);
diff --git a/src/modules/commander/state_machine_helper.cpp b/src/modules/commander/state_machine_helper.cpp
index 2516d4c68..d5ecd9647 100644
--- a/src/modules/commander/state_machine_helper.cpp
+++ b/src/modules/commander/state_machine_helper.cpp
@@ -42,6 +42,8 @@
 #include <unistd.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include <dirent.h>
+#include <fcntl.h>
 
 #include <uORB/uORB.h>
 #include <uORB/topics/vehicle_status.h>
@@ -50,6 +52,7 @@
 #include <systemlib/param/param.h>
 #include <systemlib/err.h>
 #include <drivers/drv_hrt.h>
+#include <drivers/drv_device.h>
 #include <mavlink/mavlink_log.h>
 
 #include "state_machine_helper.h"
@@ -336,6 +339,33 @@ int hil_state_transition(hil_state_t new_state, int status_pub, struct vehicle_s
 
 				mavlink_log_critical(mavlink_fd, "Switched to ON hil state");
 				valid_transition = true;
+
+				// Disable publication of all attached sensors
+
+				/* list directory */
+				DIR		*d;
+				struct dirent	*direntry;
+				d = opendir("/dev");
+				if (d) {
+
+					while ((direntry = readdir(d)) != NULL) {
+
+						int sensfd = ::open(direntry->d_name, 0);
+						int block_ret = ::ioctl(sensfd, DEVIOCSPUBBLOCK, 0);
+						close(sensfd);
+
+						printf("Disabling %s\n: %s", direntry->d_name, (!block_ret) ? "OK" : "FAIL");
+					}
+
+					closedir(d);
+
+					warnx("directory listing ok (FS mounted and readable)");
+
+				} else {
+					/* failed opening dir */
+					warnx("FAILED LISTING DEVICE ROOT DIRECTORY");
+					return 1;
+				}
 			}
 
 			break;