kern_accept
error = kern_accept(uap->s, 0, &sa, &sa_len,
error = kern_accept(uap->s, 0, NULL, 0,
error = kern_accept(uap->s, fflags, &sa, &sa_len,
error = kern_accept(uap->s, fflags, NULL, 0,
error = kern_accept(uap->s, 0, &sa, &sa_len,
error = kern_accept(uap->s, 0, NULL, 0,
int kern_accept(int s, int fflags, struct sockaddr **name, int *namelen, int *res,