Add support for displaying the schema data model with '-d' option

src/ethmngr.c

@@ -252,22 +252,26 @@ static void ethmngr_usage(char *prog)
 	fprintf(stderr, "\n");
 	fprintf(stderr, "options:\n");
 	fprintf(stderr, "    -l <log level>  As per syslog, 0 to 7\n");
+	fprintf(stderr, "    -d <schema dm>  Display the schema data model supported by micro-service\n");
 	fprintf(stderr, "    -h <help>       To print this help menu\n");
 	fprintf(stderr, "\n");
 }
 
 int main(int argc, char **argv)
 {
-	int ch;
+	int ch, dm_type = 0;
 	int log_level = 6; // default LOG_INFO
 
-	while ((ch = getopt(argc, argv, "hl:")) != -1) {
+	while ((ch = getopt(argc, argv, "hdl:")) != -1) {
 		switch (ch) {
 		case 'l':
 			log_level = (int)strtoul(optarg, NULL, 10);
 			if (log_level < 0 || log_level > 7)
 				log_level = 6;
 			break;
+		case 'd':
+			dm_type++;
+			break;
 		case 'h':
 			ethmngr_usage(argv[0]);
 			exit(0);
@@ -276,13 +280,18 @@ int main(int argc, char **argv)
 		}
 	}
 
-	openlog("ethmngr", LOG_PID|LOG_CONS|LOG_NDELAY, LOG_LOCAL1);
-
 	memset(&bbfdm_ctx, 0, sizeof(struct bbfdm_context));
 	bbfdm_ubus_set_service_name(&bbfdm_ctx, "ethmngr");
 	bbfdm_ubus_set_log_level(log_level);
 	bbfdm_ubus_load_data_model(tDynamicObj);
 
+	if (dm_type > 0) {
+		int res = bbfdm_print_data_model_schema(&bbfdm_ctx, dm_type);
+		exit(res);
+	}
+
+	openlog("ethmngr", LOG_PID|LOG_CONS|LOG_NDELAY, LOG_LOCAL1);
+
 	if (bbfdm_ubus_regiter_init(&bbfdm_ctx))
 		goto out;