uirda_poll
uirda_open, uirda_close, uirda_read, stuirda_write, uirda_poll,
int uirda_poll(void *, int, struct lwp *);
uirda_open, uirda_close, uirda_read, uirda_write, uirda_poll,
int uirda_poll(void *, int, struct lwp *);