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<dirent.h>(0P)             POSIX Programmer's Manual            <dirent.h>(0P)

       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 fol-
       lowing 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 imple-
       mentations 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  struc-
       ture,  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 http://www.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                       <dirent.h>(0P)

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