+ opt = getopt_long(argc, argv, "d:", long_options, &option_index);
+
+ if (opt == EOF)
+ break;
+
+ switch (opt) {
+ case 'd':
+ if (opt_daemon != NULL)
+ free (opt_daemon);
+ opt_daemon = strdup (optarg);
+ if (opt_daemon == NULL)
+ {
+ rrd_set_error ("strdup failed.");
+ return (NULL);
+ }
+ break;
+
+ default:
+ rrd_set_error ("Usage: rrdtool %s [--daemon <addr>] <file>",
+ argv[0]);
+ return (NULL);
+ break;
+ }
+ } /* while (42) */
+
+ if ((argc - optind) != 1) {
+ rrd_set_error ("Usage: rrdtool %s [--daemon <addr>] <file>",
+ argv[0]);
+ return (NULL);
+ }