#ifndef	MAXNAMLEN#define	MAXNAMLEN	512#endif#define DIRBUF	        1048	/* minimum buffer size for call to getdents */struct direct  {    unsigned short int d_fileno;    short int d_pad;    long int d_off;    unsigned short int d_reclen;    char d_name[1];		/* Actually longer. */  };#include <stddef.h>/* We calculate the length of the name by taking the length of the whole   `struct direct' record, subtracting the size of everything before the   name, and subtracting one for the terminating null.  */#define D_NAMLEN(d) \  ((d)->d_reclen - offsetof (struct direct, d_name) - 1)