como ejecutar pcp_recovery_node -h 192.168.1.48 -p 9898 -U pgpool -n 1 sin contraseña

int main(int argc, char **argv)
{
    char *cpasswd = NULL;
    char cmd[1024];
    int c;

    int nodenum = 0;

    while ((c = getopt(argc, argv, "h:p:U:W:n:")) != -1) {
        switch (c) {
        case 'h':
            pcp_host = pg_strdup(optarg);
            break;
        case 'p':
            pcp_port = atoi(optarg);
            break;
        case 'U':
            pcp_user = pg_strdup(optarg);
            break;
        case 'W':
            cpasswd = pg_strdup(optarg);
            break;
        case 'n':
            nodenum = atoi(optarg);
            break;
        default:
            fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
                    progname);
            exit(1);
        }