extern struct iop *io_open(int, int, int);
extern void io_init(void);
extern void io_close(struct iop *, struct timeval *);
+extern void io_timeout(struct timeval *, time_t);
extern int io_input(struct iop *, struct timeval *);
extern int io_inputwaiting(struct iop *);
extern int io_outputwaiting(struct iop *);