diff --git a/tools/evemu-play.c b/tools/evemu-play.c
index c2aef3e..9c868a2 100644
--- a/tools/evemu-play.c
+++ b/tools/evemu-play.c
@@ -45,43 +45,77 @@
 #include <fcntl.h>
 #include <string.h>
 #include <unistd.h>
+#include <getopt.h>
+
+void usage(char *program_name) {
+	fprintf(stderr, "Usage: %s [--insert-slot0] [--output output_file] <device>\n", program_name);
+	fprintf(stderr, "\n");
+	fprintf(stderr, "--insert-slot0: insert a slot 0 event if missing in the very first packet.\n");
+	fprintf(stderr, "--output: specify the output file name.\n");
+	fprintf(stderr, "Note: event data is read from standard input.\n");
+}
 
 int main(int argc, char *argv[])
 {
 	int fd;
+	int c;
+	int flag_slot0 = 0;
 	FILE *fp_time = NULL;
 	char *output_filename = NULL;
-	int flag_slot0 = 0;
-	if (argc < 2 || argc > 4) {
-		fprintf(stderr, "Usage: %s <device> [--insert-slot0] [output_file]\n", argv[0]);
-		fprintf(stderr, "\n");
-		fprintf(stderr, "--insert-slot0: insert a slot 0 event if missing in the very first packet.\n");
-		fprintf(stderr, "Event data is read from standard input.\n");
+	char *device_name = NULL;
+
+	/* Get options */
+	while (1) {
+		static struct option long_options[] = {
+			{"insert-slot0", no_argument, 0, 'i'},
+			{"output", required_argument, 0, 'o'},
+			{0, 0, 0, 0}
+		};
+		int option_index = 0;
+		c = getopt_long(argc, argv, "io:", long_options, &option_index);
+		if (c == -1)
+			break;
+		switch (c) {
+			case 0:
+				break;
+			case 'i':
+				flag_slot0 = 1;
+				break;
+			case 'o':
+				output_filename = optarg;
+				break;
+			case '?':
+			default:
+				usage(argv[0]);
+				return -1;
+		}
+	}
+
+	/* Get command line argument: device */
+	if (optind >= argc) {
+		fprintf(stderr, "You need to supply the <device>.\n");
+		usage(argv[0]);
 		return -1;
 	}
-	fd = open(argv[1], O_WRONLY);
+	device_name = argv[optind];
+
+	/* Open the event device */
+	fd = open(device_name, O_WRONLY);
 	if (fd < 0) {
-		fprintf(stderr, "error: could not open device\n");
+		fprintf(stderr, "Error: fail to open device %s\n", device_name);
 		return -1;
 	}
-	if (argc >= 3) {
-		if (strcmp(argv[2], "--insert-slot0") == 0) {
-			flag_slot0 = 1;
-			if (argc == 4) {
-				output_filename = argv[3];
-			}
-		} else {
-			output_filename = argv[2];
-		}
-		if (output_filename != NULL) {
-			fp_time = fopen(output_filename, "w");
-			if (fp_time == NULL) {
-				fprintf(stderr, "error: could not open output file %s.\n",
-					output_filename);
-				return -1;
-			}
+
+	/* Open the optional output file */
+	if (output_filename != NULL) {
+		fp_time = fopen(output_filename, "w");
+		if (fp_time == NULL) {
+			fprintf(stderr, "Error: fail to open output file %s.\n",
+				output_filename);
+			return -1;
 		}
 	}
+
 	if (evemu_play(stdin, fd, fp_time, flag_slot0)) {
 		fprintf(stderr, "error: could not describe device\n");
 	}