monitor: add help information

1 files changed, 15 insertions, 1 deletions

diff --git a/monitor/main.c b/monitor/main.c
index 9021133c6..3c4886f30 100644
--- a/monitor/main.c
+++ b/monitor/main.c
@@ -46,8 +46,19 @@ static void signal_callback(int signum, void *user_data)
 	}
 }
 
+static void usage(void)
+{
+	printf("btmon - Bluetooth monitor\n"
+		"Usage:\n");
+	printf("\tbtmon [options]\n");
+	printf("options:\n"
+		"\t-b, --btsnoop <file>  Save dump in btsnoop format\n"
+		"\t-h, --help            Show help options\n");
+}
+
 static const struct option main_options[] = {
 	{ "btsnoop",	required_argument, NULL, 'b'	},
+	{ "help",	no_argument,	   NULL, 'h'	},
 	{ }
 };
 
@@ -61,7 +72,7 @@ int main(int argc, char *argv[])
 	for (;;) {
 		int opt;
 
-		opt = getopt_long(argc, argv, "b", main_options, NULL);
+		opt = getopt_long(argc, argv, "bh", main_options, NULL);
 		if (opt < 0)
 			break;
 
@@ -69,6 +80,9 @@ int main(int argc, char *argv[])
 		case 'b':
 			btsnoop_open(optarg);
 			break;
+		case 'h':
+			usage();
+			return EXIT_SUCCESS;
 		default:
 			return EXIT_FAILURE;
 		}