extern struct dirent *readdir(DIR *);
extern int readdir_r(DIR *, struct dirent *, struct dirent **);
extern void rewinddir(DIR *);
extern void seekdir(DIR *, long int);
extern long int telldir(DIR *);
extern struct dirent *readdir(DIR *);
extern int readdir_r(DIR *, struct dirent *, struct dirent **);
extern void rewinddir(DIR *);
extern void seekdir(DIR *, long int);
extern long int telldir(DIR *);