ftruncate_args
{ .sy_narg = AS(ftruncate_args), .sy_call = (sy_call_t *)sys_ftruncate, .sy_auevent = AUE_FTRUNCATE, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC }, /* 480 = ftruncate */
sys_ftruncate(struct thread *td, struct ftruncate_args *uap)
struct ftruncate_args *p = params;
int sys_ftruncate(struct thread *, struct ftruncate_args *);