errno_unix.h
#define ENOTDIR (-120)
#define EACCES (-54)
#define EEXIST (-48)
#define EBUSY (-47)
#define EROFS (-44)
#define ENOENT (-43)
#define ENFILE (-42)
#define EIO (-36)
#define ENOSPC (-34)
#define ESRCH 3
#define EINTR 4
#define EBADF 9
#define ENODEV 19
#define EINVAL 22
#define EMFILE 24