fix incorrect argc < 1 check for no arguments

-requiring arguments should be argc < 2

src/drivers/ardrone_interface/ardrone_interface.c

@@ -108,8 +108,9 @@ usage(const char *reason)
  */
 int ardrone_interface_main(int argc, char *argv[])
 {
-		if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/drivers/hott/hott_sensors/hott_sensors.cpp

@@ -197,7 +197,7 @@ hott_sensors_thread_main(int argc, char *argv[])
 int
 hott_sensors_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "missing command\n%s", commandline_usage);
 	}
 

src/drivers/hott/hott_telemetry/hott_telemetry.cpp

@@ -223,7 +223,7 @@ hott_telemetry_thread_main(int argc, char *argv[])
 int
 hott_telemetry_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "missing command\n%s", commandline_usage);
 	}
 

src/drivers/md25/md25_main.cpp

@@ -97,8 +97,9 @@ usage(const char *reason)
 int md25_main(int argc, char *argv[])
 {
 
-	if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/drivers/roboclaw/roboclaw_main.cpp

@@ -92,8 +92,9 @@ static void usage()
 int roboclaw_main(int argc, char *argv[])
 {
 
-	if (argc < 1)
+	if (argc < 2) {
 		usage();
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/examples/fixedwing_control/main.c

@@ -418,7 +418,7 @@ usage(const char *reason)
  */
 int ex_fixedwing_control_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/examples/flow_position_estimator/flow_position_estimator_main.c

@@ -99,7 +99,7 @@ static void usage(const char *reason)
  */
 int flow_position_estimator_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/examples/matlab_csv_serial/matlab_csv_serial.c

@@ -91,7 +91,7 @@ static void usage(const char *reason)
  */
 int matlab_csv_serial_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/examples/publisher/publisher_start_nuttx.cpp

@@ -54,7 +54,7 @@ extern int main(int argc, char **argv);
 extern "C" __EXPORT int publisher_main(int argc, char *argv[]);
 int publisher_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: publisher {start|stop|status}");
 	}
 

src/examples/px4_daemon_app/px4_daemon_app.c

@@ -88,7 +88,7 @@ usage(const char *reason)
  */
 int px4_daemon_app_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/examples/rover_steering_control/main.cpp

@@ -412,7 +412,7 @@ usage(const char *reason)
  */
 int rover_steering_control_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/examples/subscriber/subscriber_start_nuttx.cpp

@@ -54,7 +54,7 @@ extern int main(int argc, char **argv);
 extern "C" __EXPORT int subscriber_main(int argc, char *argv[]);
 int subscriber_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: subscriber {start|stop|status}");
 	}
 

src/modules/attitude_estimator_ekf/attitude_estimator_ekf_main.cpp

@@ -118,8 +118,9 @@ usage(const char *reason)
  */
 int attitude_estimator_ekf_main(int argc, char *argv[])
 {
-	if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/attitude_estimator_so3/attitude_estimator_so3_main.cpp

@@ -136,8 +136,9 @@ usage(const char *reason)
  */
 int attitude_estimator_so3_main(int argc, char *argv[])
 {
-	if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/commander/commander.cpp

@@ -261,7 +261,7 @@ void answer_command(struct vehicle_command_s &cmd, enum VEHICLE_CMD_RESULT resul
 
 int commander_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/modules/ekf_att_pos_estimator/ekf_att_pos_estimator_main.cpp

@@ -1516,7 +1516,7 @@ int AttitudePositionEstimatorEKF::trip_nan()
 
 int ekf_att_pos_estimator_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: ekf_att_pos_estimator {start|stop|status|logging}");
 	}
 

src/modules/fixedwing_backside/fixedwing_backside_main.cpp

@@ -97,8 +97,9 @@ usage(const char *reason)
 int fixedwing_backside_main(int argc, char *argv[])
 {
 
-	if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/fw_att_control/fw_att_control_main.cpp

@@ -1134,8 +1134,9 @@ FixedwingAttitudeControl::start()
 
 int fw_att_control_main(int argc, char *argv[])
 {
-	if (argc < 1)
+	if (argc < 2) {
 		errx(1, "usage: fw_att_control {start|stop|status}");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/fw_pos_control_l1/fw_pos_control_l1_main.cpp

@@ -1638,8 +1638,9 @@ FixedwingPositionControl::start()
 
 int fw_pos_control_l1_main(int argc, char *argv[])
 {
-	if (argc < 1)
+	if (argc < 2) {
 		errx(1, "usage: fw_pos_control_l1 {start|stop|status}");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/land_detector/land_detector_main.cpp

@@ -178,7 +178,7 @@ static int land_detector_start(const char *mode)
 int land_detector_main(int argc, char *argv[])
 {
 
-	if (argc < 1) {
+	if (argc < 2) {
 		goto exiterr;
 	}
 

src/modules/mc_att_control/mc_att_control_main.cpp

@@ -922,8 +922,9 @@ MulticopterAttitudeControl::start()
 
 int mc_att_control_main(int argc, char *argv[])
 {
-	if (argc < 1)
+	if (argc < 2) {
 		errx(1, "usage: mc_att_control {start|stop|status}");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/mc_att_control_multiplatform/mc_att_control_start_nuttx.cpp

@@ -54,7 +54,7 @@ extern int main(int argc, char **argv);
 extern "C" __EXPORT int mc_att_control_m_main(int argc, char *argv[]);
 int mc_att_control_m_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: mc_att_control_m {start|stop|status}");
 	}
 

src/modules/mc_pos_control/mc_pos_control_main.cpp

@@ -1440,7 +1440,7 @@ MulticopterPositionControl::start()
 
 int mc_pos_control_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: mc_pos_control {start|stop|status}");
 	}
 

src/modules/mc_pos_control_multiplatform/mc_pos_control_start_nuttx.cpp

@@ -54,7 +54,7 @@ extern int main(int argc, char **argv);
 extern "C" __EXPORT int mc_pos_control_m_main(int argc, char *argv[]);
 int mc_pos_control_m_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: mc_pos_control_m {start|stop|status}");
 	}
 

src/modules/position_estimator_inav/position_estimator_inav_main.c

@@ -134,7 +134,7 @@ static void usage(const char *reason)
  */
 int position_estimator_inav_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		usage("missing command");
 	}
 

src/modules/segway/segway_main.cpp

@@ -92,8 +92,9 @@ usage(const char *reason)
 int segway_main(int argc, char *argv[])
 {
 
-	if (argc < 1)
+	if (argc < 2) {
 		usage("missing command");
+	}
 
 	if (!strcmp(argv[1], "start")) {
 

src/modules/sensors/sensors.cpp

@@ -2252,7 +2252,7 @@ Sensors::start()
 
 int sensors_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: sensors {start|stop|status}");
 	}
 

src/modules/vtol_att_control/vtol_att_control_main.cpp

@@ -877,7 +877,7 @@ VtolAttitudeControl::start()
 
 int vtol_att_control_main(int argc, char *argv[])
 {
-	if (argc < 1) {
+	if (argc < 2) {
 		errx(1, "usage: vtol_att_control {start|stop|status}");
 	}