O_RDONLY c_int :: 0
O_WRONLY c_int :: 1
O_RDWR c_int :: 2

STDIN_FILENO c_int :: 0
STDOUT_FILENO c_int :: 1
STDERR_FILENO c_int :: 2

EINTR c_int :: 4
EBADF c_int :: 9

open c_func(_ *c_char, _ c_int, ...) c_int
close c_func(_ c_int) c_int
read c_func(_ c_int, _ ?*mut anyopaque, _ c_ulong) c_long
write c_func(_ c_int, _ ?*anyopaque, _ c_ulong) c_long
__error c_func() *mut c_int