file.h

#ifndef _FILE_H_
#define _FILE_H_
/* This is file FILE.H */
 
#include <fcntl.h>
 
#ifndef L_SET
# define L_SET  0       /* seek from beginning.  */
# define L_CURR 1       /* seek from current position.  */
# define L_INCR 1       /* ditto.  */
# define L_XTND 2       /* seek from end.  */
#endif
 
#ifndef R_OK
# define R_OK  4        /* test whether readable.  */
# define W_OK  2        /* test whether writable.  */
# define X_OK  1        /* test whether executable. */
# define F_OK  0        /* test whether exist.  */
#endif
 
#endif