__fcntl
extern int __fcntl(int, int, ...);
return (__fcntl(fildes, cmd, arg, arg1));
extern int __fcntl(int, int, ...);
append = (__fcntl(arg->fd, F_GETFL) & O_APPEND);
append = (__fcntl(arg->fd, F_GETFL) & O_APPEND);
extern int __fcntl(int, int, ...);
extern int __fcntl(int, int, ...);
return (__fcntl(fildes, cmd, arg, arg1));
PERFORM(__fcntl(fildes, cmd, arg))