t_accept
if (t_accept(listen_fd, fd, call) == -1) {
while (t_accept(fd, new_fd, call) == -1) {
if (t_accept(fd, Acceptfd, call) < 0) {
extern int t_accept(int, int, struct t_call *);
extern int t_accept(int, int, const struct t_call *);
while (t_accept(srcfd, destfd, &t_call) == -1) {
extern int t_accept(int fildes, int resfd, struct t_call *call);