extern int fio_clients_send_ini(const char *);
extern int fio_handle_clients(void);
extern void fio_client_add(const char *);
-extern void fio_client_add_cmd_option(const char *, const char *);
+extern int fio_client_add_cmd_option(const char *, const char *);
extern int fio_recv_data(int sk, void *p, unsigned int len);
extern int fio_send_data(int sk, const void *p, unsigned int len);