client: Fix stay on error handling in non-interactive

Returns the FAILURE status since there is no meaning of stay in
non-interactive mode when executing some commands with an invalid
argument or with no controller. Also returns with the SUCCESS status
when getting a scan filtering value or disconnecting a non-default
device.
diff --git a/client/advertising.c b/client/advertising.c
index 4517f8f..152a22a 100644
--- a/client/advertising.c
+++ b/client/advertising.c
@@ -644,7 +644,7 @@
 	}
 
 	if (ad.tx_power == *value)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 
 	ad.tx_power = *value;
 
diff --git a/client/main.c b/client/main.c
index 9cc0a29..584217a 100644
--- a/client/main.c
+++ b/client/main.c
@@ -840,7 +840,7 @@
 
 	if (argc < 2 || !strlen(argv[1])) {
 		if (check_default_ctrl() == FALSE)
-			return;
+			return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 		proxy = default_ctrl->proxy;
 	} else {
@@ -848,7 +848,7 @@
 		if (!adapter) {
 			bt_shell_printf("Controller %s not available\n",
 								argv[1]);
-			return;
+			return bt_shell_noninteractive_quit(EXIT_FAILURE);
 		}
 		proxy = adapter->proxy;
 	}
@@ -960,7 +960,7 @@
 	char *name;
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	name = g_strdup(argv[1]);
 
@@ -977,7 +977,7 @@
 	char *name;
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	name = g_strdup("");
 
@@ -995,10 +995,10 @@
 	char *str;
 
 	if (!parse_argument(argc, argv, NULL, NULL, &powered, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	str = g_strdup_printf("power %s", powered == TRUE ? "on" : "off");
 
@@ -1016,10 +1016,10 @@
 	char *str;
 
 	if (!parse_argument(argc, argv, NULL, NULL, &pairable, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	str = g_strdup_printf("pairable %s", pairable == TRUE ? "on" : "off");
 
@@ -1039,10 +1039,10 @@
 	char *str;
 
 	if (!parse_argument(argc, argv, NULL, NULL, &discoverable, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	str = g_strdup_printf("discoverable %s",
 				discoverable == TRUE ? "on" : "off");
@@ -1202,10 +1202,10 @@
 	const char *method;
 
 	if (!parse_argument(argc, argv, NULL, NULL, &enable, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (enable == TRUE) {
 		set_discovery_filter();
@@ -1230,7 +1230,7 @@
 		for (uuid = filter.uuids; uuid && *uuid; uuid++)
 			print_uuid(*uuid);
 
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 	}
 
 	g_strfreev(filter.uuids);
@@ -1257,7 +1257,7 @@
 	if (argc < 2 || !strlen(argv[1])) {
 		if (filter.rssi != DISTANCE_VAL_INVALID)
 			bt_shell_printf("RSSI: %d\n", filter.rssi);
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 	}
 
 	filter.pathloss = DISTANCE_VAL_INVALID;
@@ -1272,7 +1272,7 @@
 		if (filter.pathloss != DISTANCE_VAL_INVALID)
 			bt_shell_printf("Pathloss: %d\n",
 						filter.pathloss);
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 	}
 
 	filter.rssi = DISTANCE_VAL_INVALID;
@@ -1287,7 +1287,7 @@
 		if (filter.transport)
 			bt_shell_printf("Transport: %s\n",
 					filter.transport);
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 	}
 
 	g_free(filter.transport);
@@ -1301,7 +1301,7 @@
 	if (argc < 2 || !strlen(argv[1])) {
 		bt_shell_printf("DuplicateData: %s\n",
 				filter.duplicate ? "on" : "off");
-		return;
+		return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 	}
 
 	if (!strcmp(argv[1], "on"))
@@ -1310,7 +1310,7 @@
 		filter.duplicate = false;
 	else {
 		bt_shell_printf("Invalid option: %s\n", argv[1]);
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 	}
 
 	filter.set = false;
@@ -1412,12 +1412,12 @@
 		all = true;
 
 	if (!data_clear(filter_clear, all ? "all" : argv[1]))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	filter.set = false;
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	set_discovery_filter();
 }
@@ -1667,7 +1667,7 @@
 	GDBusProxy *proxy;
 
 	if (check_default_ctrl() == FALSE)
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (strcmp(argv[1], "*") == 0) {
 		GList *list;
@@ -1684,7 +1684,7 @@
 	proxy = find_proxy_by_address(default_ctrl->devices, argv[1]);
 	if (!proxy) {
 		bt_shell_printf("Device %s not available\n", argv[1]);
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 	}
 
 	remove_device(proxy);
@@ -1746,10 +1746,8 @@
 
 	bt_shell_printf("Successful disconnected\n");
 
-	if (proxy != default_dev)
-		return;
-
-	set_default_device(NULL, NULL);
+	if (proxy == default_dev)
+		set_default_device(NULL, NULL);
 
 	return bt_shell_noninteractive_quit(EXIT_SUCCESS);
 }
@@ -1799,7 +1797,7 @@
 
 	if (!default_dev) {
 		bt_shell_printf("No device connected\n");
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 	}
 
 	name = g_strdup(argv[1]);
@@ -1820,7 +1818,7 @@
 
 	if (!default_dev) {
 		bt_shell_printf("No device connected\n");
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 	}
 
 	proxy = gatt_select_attribute(default_attr, argv[1]);
@@ -1964,7 +1962,7 @@
 	dbus_bool_t enable;
 
 	if (!parse_argument(argc, argv, NULL, NULL, &enable, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (!default_attr) {
 		bt_shell_printf("No attribute selected\n");
@@ -2150,7 +2148,7 @@
 
 	if (!parse_argument(argc, argv, ad_arguments, "type",
 					&enable, &type))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	if (!default_ctrl || !default_ctrl->ad_proxy) {
 		bt_shell_printf("LEAdvertisingManager not found\n");
@@ -2193,7 +2191,7 @@
 	}
 
 	if (!parse_argument(argc, argv, NULL, NULL, &powered, NULL))
-		return;
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 
 	ad_advertise_tx_power(dbus_conn, &powered);
 }
@@ -2350,7 +2348,8 @@
 	if (argc < 2 || !strlen(argv[1]))
 		all = true;
 
-	data_clear(ad_clear, all ? "all" : argv[1]);
+	if(!data_clear(ad_clear, all ? "all" : argv[1]))
+		return bt_shell_noninteractive_quit(EXIT_FAILURE);
 }
 
 static const struct bt_shell_menu advertise_menu = {