#define OPEN_RDONLY O_RDONLY /* other system use standard codes */
#define OPEN_WRONLY O_WRONLY /* for binary */
#define OPEN_RDWR O_RDWR
#define OPEN_RDONLY O_RDONLY /* other system use standard codes */
#define OPEN_WRONLY O_WRONLY /* for binary */
#define OPEN_RDWR O_RDWR