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/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.

This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public License as

published by the Free Software Foundation; either version 2 of the

License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with the GNU C Library; see the file COPYING.LIB.  If

not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,

Cambridge, MA 02139, USA.  */

/*

 *      POSIX Standard: 5.1.2 Directory Operations      <dirent.h>

 */

#ifndef _DIRENT_H

#define _DIRENT_H       1

#include <features.h>

__BEGIN_DECLS

#include <gnu/types.h>

#define __need_size_t

#include <stddef.h>

#include <sys/types.h>

#include <linux/limits.h>

#include <linux/dirent.h>

#if defined(__USE_GNU)

#define d_fileno        d_ino           /* glibc compatibility.  */

#if 0

#define d_namlen        d_reclen        /* glibc compatibility.  */

#endif

#endif

#if defined(DIRENT_ILLEGAL_ACCESS) || \

        (defined(__SVR4_I386_ABI_L1__) && !defined(INTERNAL_LINUX_C_LIB))

/* Use it at your own risk. */

typedef struct DIR

{

  /* file descriptor */

  int dd_fd;

  /* offset of the next dir entry in buffer */

  off_t dd_loc;

  /* bytes of valid entries in buffer */

  size_t dd_size;

  /* -> directory buffer */

  struct dirent *dd_buf;

} DIR;

#else

/* The internal is hidden from the user. */

typedef struct DIR DIR;

#endif

/* Open a directory stream on NAME.

   Return a DIR stream on the directory, or NULL if it could not be opened.  */

extern DIR *opendir __P ((__const char *__name));

/* Close the directory stream DIRP.

   Return 0 if successful, -1 if not.  */

extern int closedir __P ((DIR * __dirp));

/* Read a directory entry from DIRP.

   Return a pointer to a `struct dirent' describing the entry,

   or NULL for EOF or error.  The storage returned may be overwritten

   by a later readdir call on the same DIR stream.  */

extern struct dirent *readdir __P ((DIR * __dirp));

/* Rewind DIRP to the beginning of the directory.  */

extern void rewinddir __P ((DIR * __dirp));

#if defined(__USE_BSD) || defined(__USE_MISC)

#ifndef MAXNAMLEN

/* Get the definitions of the POSIX.1 limits.  */

#include <posix1_lim.h>

/* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'.  */

#ifdef  NAME_MAX

#define MAXNAMLEN       NAME_MAX

#else

#define MAXNAMLEN       255

#endif

#endif

#include <gnu/types.h>

/* Seek to position POS on DIRP.  */

extern void seekdir __P ((DIR * __dirp, __off_t __pos));

/* Return the current position of DIRP.  */

extern __off_t telldir __P ((DIR * __dirp));

typedef int (*__dir_select_fn_t) __P ((__const struct dirent *));

typedef int (*__dir_compar_fn_t) __P ((

                __const struct dirent * __const *,

                __const struct dirent * __const *

                ));

/* Scan the directory DIR, calling SELECT on each directory entry.

   Entries for which SELECT returns nonzero are individually malloc'd,

   sorted using qsort with CMP, and collected in a malloc'd array in

   *NAMELIST.  Returns the number of entries selected, or -1 on error.  */

extern int scandir __P ((__const char *__dir,

                         struct dirent ***__namelist,

                         __dir_select_fn_t __dir_select_fn,

                         __dir_compar_fn_t __dir_compar_fn));

/* Function to compare two `struct dirent's alphabetically.  */

extern int alphasort __P ((

                __const struct dirent * __const *,

                __const struct dirent * __const *

                ));

/* Read directory entries from FD into BUF, reading at most NBYTES.

   Reading starts at offset *BASEP, and *BASEP is updated with the new

   position after reading.  Returns the number of bytes read; zero when at

   end of directory; or -1 for errors.  */

extern __ssize_t __getdirentries __P ((int __fd, char *__buf,

                                       size_t __nbytes, __off_t *__basep));

extern __ssize_t getdirentries __P ((int __fd, char *__buf,

                                     size_t __nbytes, __off_t *__basep));

extern int dirfd __P ((DIR *__dirp));

#endif /* Use BSD or misc.  */

#if defined(_POSIX_THREAD_SAFE_FUNCTIONS) || defined(_REENTRANT)

extern int readdir_r __P((DIR *__dirp, struct dirent *__entry,

                struct dirent **__result));

#endif

__END_DECLS

#endif /* dirent.h  */