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       dirent.h - format of directory entries


       #include <dirent.h>


       The internal format of directories is unspecified.

       The <dirent.h> header shall define the following type:

       DIR    A type representing a directory stream.

       It  shall  also  define  the  structure  dirent which shall include the
       following members:

              ino_t  d_ino       File serial number.

              char   d_name[]    Name of entry.

       The type ino_t shall be defined as described in <sys/types.h> .

       The character array d_name is of unspecified size, but  the  number  of
       bytes  preceding the terminating null byte shall not exceed {NAME_MAX}.

       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided.

              int            closedir(DIR *);
              DIR           *opendir(const char *);
              struct dirent *readdir(DIR *);

              int            readdir_r(DIR *restrict, struct dirent *restrict,
                                 struct dirent **restrict);

              void           rewinddir(DIR *);

              void           seekdir(DIR *, long);
              long           telldir(DIR *);

       The following sections are informative.




       Information  similar to that in the <dirent.h> header is contained in a
       file <sys/dir.h> in 4.2 BSD  and  4.3  BSD.  The  equivalent  in  these
       implementations    of    struct    dirent    from    this   volume   of
       IEEE Std 1003.1-2001 is struct direct. The filename was changed because
       the  name <sys/dir.h> was also used in earlier implementations to refer
       to definitions related to the older access method; this  produced  name
       conflicts. The name of the structure was changed because this volume of
       IEEE Std 1003.1-2001  does  not  completely  define  what  is  in   the
       structure, so it could be different on some implementations from struct

       The name of an array of char of an unspecified size should not be  used
       as an lvalue. Use of:


       is incorrect; use:



       The  array of char d_name is not a fixed size. Implementations may need
       to declare struct dirent with an array size for d_name of  1,  but  the
       actual number of characters provided matches (or only slightly exceeds)
       the length of the filename.




       <sys/types.h> , the System Interfaces volume  of  IEEE Std 1003.1-2001,
       closedir(),  opendir(), readdir(), readdir_r(), rewinddir(), seekdir(),


       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the  referee document. The original Standard can be obtained online
       at .