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