err = argp_parse (&rnetclient_argp, argc, argv, 0, NULL, &rnet_args);
if (err != 0)
fprintf(stderr, "internal error while parsing command line arguments.");
err = argp_parse (&rnetclient_argp, argc, argv, 0, NULL, &rnet_args);
if (err != 0)
fprintf(stderr, "internal error while parsing command line arguments.");