как все таки правильно ?

DESCRIPTION
       The readdir() function returns a pointer to a dirent structure representing the next directory
       entry in the directory stream pointed to by dirp.  It returns NULL on reaching the end of  the
       directory stream or if an error occurred.

       On Linux, the dirent structure is defined as follows:

           struct dirent {
               ino_t          d_ino;       /* inode number */
               off_t          d_off;       /* not an offset; see NOTES */
               unsigned short d_reclen;    /* length of this record */
               unsigned char  d_type;      /* type of file; not supported
                                              by all filesystem types */
               char           d_name[256]; /* filename */
           };

       The only fields in the dirent structure that are mandated by POSIX.1 are: d_name[], of unspec‐
       ified size, with at most NAME_MAX characters preceding the terminating null byte  ('\0');  and
       (as an XSI extension) d_ino.  The other fields are unstandardized, and not present on all sys‐
       tems; see NOTES below for some further details.