otruncate_args
{ compat(AS(otruncate_args),truncate), .sy_auevent = AUE_TRUNCATE, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC }, /* 129 = old truncate */
otruncate(struct thread *td, struct otruncate_args *uap)
int otruncate(struct thread *, struct otruncate_args *);