kern_pwritev
error = kern_pwritev(td, uap->fd, auio, PAIR32TO64(off_t,uap->offset));
error = kern_pwritev(td, uap->fd, auio, offset);
error = kern_pwritev(td, fd, &auio, offset);
error = kern_pwritev(td, uap->fd, auio, uap->offset);
int kern_pwritev(struct thread *td, int fd, struct uio *auio, off_t offset);