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/* Copyright (C) 1991-1999, 2000 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

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

   License along with the GNU C Library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA

   02111-1307 USA.  */

/*

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

 */

#ifndef _DIRENT_H

#define _DIRENT_H       1

#include <features.h>

__BEGIN_DECLS

#include <bits/types.h>

#ifdef __USE_XOPEN

# ifndef __ino_t_defined

#  ifndef __USE_FILE_OFFSET64

typedef __ino_t ino_t;

#  else

typedef __ino64_t ino_t;

#  endif

#  define __ino_t_defined

# endif

# if defined __USE_LARGEFILE64 && !defined __ino64_t_defined

typedef __ino64_t ino64_t;

#  define __ino64_t_defined

# endif

#endif

/* This file defines `struct dirent'.

   It defines the macro `_DIRENT_HAVE_D_NAMLEN' iff there is a `d_namlen'

   member that gives the length of `d_name'.

   It defines the macro `_DIRENT_HAVE_D_RECLEN' iff there is a `d_reclen'

   member that gives the size of the entire directory entry.

   It defines the macro `_DIRENT_HAVE_D_OFF' iff there is a `d_off'

   member that gives the file offset of the next directory entry.

   It defines the macro `_DIRENT_HAVE_D_TYPE' iff there is a `d_type'

   member that gives the type of the file.

 */

#include <bits/dirent.h>

#if (defined __USE_BSD || defined __USE_MISC) && !defined d_fileno

# define d_ino  d_fileno                 /* Backward compatibility.  */

#endif

/* These macros extract size information from a `struct dirent *'.

   They may evaluate their argument multiple times, so it must not

   have side effects.  Each of these may involve a relatively costly

   call to `strlen' on some systems, so these values should be cached.

   _D_EXACT_NAMLEN (DP) returns the length of DP->d_name, not including

   its terminating null character.

   _D_ALLOC_NAMLEN (DP) returns a size at least (_D_EXACT_NAMLEN (DP) + 1);

   that is, the allocation size needed to hold the DP->d_name string.

   Use this macro when you don't need the exact length, just an upper bound.

   This macro is less likely to require calling `strlen' than _D_EXACT_NAMLEN.

   */

#ifdef _DIRENT_HAVE_D_NAMLEN

# define _D_EXACT_NAMLEN(d) ((d)->d_namlen)

# define _D_ALLOC_NAMLEN(d) (_D_EXACT_NAMLEN (d) + 1)

#else

# define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name))

# ifdef _DIRENT_HAVE_D_RECLEN

#  define _D_ALLOC_NAMLEN(d) (((char *) (d) + (d)->d_reclen) - &(d)->d_name[0])

# else

#  define _D_ALLOC_NAMLEN(d) (sizeof (d)->d_name > 1 ? sizeof (d)->d_name : \

                              _D_EXACT_NAMLEN (d) + 1)

# endif

#endif

#ifdef __USE_BSD

/* File types for `d_type'.  */

enum

  {

    DT_UNKNOWN = 0,

# define DT_UNKNOWN     DT_UNKNOWN

    DT_FIFO = 1,

# define DT_FIFO        DT_FIFO

    DT_CHR = 2,

# define DT_CHR         DT_CHR

    DT_DIR = 4,

# define DT_DIR         DT_DIR

    DT_BLK = 6,

# define DT_BLK         DT_BLK

    DT_REG = 8,

# define DT_REG         DT_REG

    DT_LNK = 10,

# define DT_LNK         DT_LNK

    DT_SOCK = 12,

# define DT_SOCK        DT_SOCK

    DT_WHT = 14

# define DT_WHT         DT_WHT

  };

/* Convert between stat structure types and directory types.  */

# define IFTODT(mode)   (((mode) & 0170000) >> 12)

# define DTTOIF(dirtype)        ((dirtype) << 12)

#endif

/* This is the data type of directory stream objects.

   The actual structure is opaque to users.  */

typedef struct __dirstream DIR;

/* Open a directory stream on NAME.

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

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

/* Close the directory stream DIRP.

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

extern int closedir (DIR *__dirp) __THROW;

/* 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.

   If the Large File Support API is selected we have to use the

   appropriate interface.  */

#ifndef __USE_FILE_OFFSET64

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

#else

# ifdef __REDIRECT

extern struct dirent *__REDIRECT (readdir, (DIR *__dirp) __THROW, readdir64);

# else

#  define readdir readdir64

# endif

#endif

#ifdef __USE_LARGEFILE64

extern struct dirent64 *readdir64 (DIR *__dirp) __THROW;

#endif

#if defined __USE_POSIX || defined __USE_MISC

/* Reentrant version of `readdir'.  Return in RESULT a pointer to the

   next entry.  */

# ifndef __USE_FILE_OFFSET64

extern int readdir_r (DIR *__restrict __dirp,

                      struct dirent *__restrict __entry,

                      struct dirent **__restrict __result) __THROW;

# else

#  ifdef __REDIRECT

extern int __REDIRECT (readdir_r,

                       (DIR *__restrict __dirp,

                        struct dirent *__restrict __entry,

                        struct dirent **__restrict __result) __THROW,

                       readdir64_r);

#  else

#   define readdir_r readdir64_r

#  endif

# endif

# ifdef __USE_LARGEFILE64

extern int readdir64_r (DIR *__restrict __dirp,

                        struct dirent64 *__restrict __entry,

                        struct dirent64 **__restrict __result) __THROW;

# endif

#endif  /* POSIX or misc */

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

extern void rewinddir (DIR *__dirp) __THROW;

#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN

# include <bits/types.h>

/* Seek to position POS on DIRP.  */

extern void seekdir (DIR *__dirp, long int __pos) __THROW;

/* Return the current position of DIRP.  */

extern long int telldir (DIR *__dirp) __THROW;

#endif

#if defined __USE_BSD || defined __USE_MISC

/* Return the file descriptor used by DIRP.  */

extern int dirfd (DIR *__dirp) __THROW;

# if defined __OPTIMIZE__ && defined _DIR_dirfd

#  define dirfd(dirp)   _DIR_dirfd (dirp)

# endif

# ifndef MAXNAMLEN

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

#  include <bits/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

# define __need_size_t

# include <stddef.h>

/* Scan the directory DIR, calling SELECTOR 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.  */

# ifndef __USE_FILE_OFFSET64

extern int scandir (__const char *__restrict __dir,

                    struct dirent ***__restrict __namelist,

                    int (*__selector) (__const struct dirent *),

                    int (*__cmp) (__const void *, __const void *)) __THROW;

# else

#  ifdef __REDIRECT

extern int __REDIRECT (scandir,

                       (__const char *__restrict __dir,

                        struct dirent ***__restrict __namelist,

                        int (*__selector) (__const struct dirent *),

                        int (*__cmp) (__const void *, __const void *)) __THROW,

                       scandir64);

#  else

#   define scandir scandir64

#  endif

# endif

# if defined __USE_GNU && defined __USE_LARGEFILE64

/* This function is like `scandir' but it uses the 64bit dirent structure.

   Please note that the CMP function must now work with struct dirent64 **.  */

extern int scandir64 (__const char *__restrict __dir,

                      struct dirent64 ***__restrict __namelist,

                      int (*__selector) (__const struct dirent64 *),

                      int (*__cmp) (__const void *, __const void *)) __THROW;

# endif

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

# ifndef __USE_FILE_OFFSET64

extern int alphasort (__const void *__e1, __const void *__e2)

     __THROW __attribute_pure__;

# else

#  ifdef __REDIRECT

extern int __REDIRECT (alphasort,

                       (__const void *__e1, __const void *__e2)

                       __THROW,

                       alphasort64) __attribute_pure__;

#  else

#   define alphasort alphasort64

#  endif

# endif

# if defined __USE_GNU && defined __USE_LARGEFILE64

extern int alphasort64 (__const void *__e1, __const void *__e2)

     __THROW __attribute_pure__;

# endif

# ifdef __USE_GNU

/* Function to compare two `struct dirent's by name & version.  */

#  ifndef __USE_FILE_OFFSET64

extern int versionsort (__const void *__e1, __const void *__e2)

     __THROW __attribute_pure__;

#  else

#   ifdef __REDIRECT

extern int __REDIRECT (versionsort,

                       (__const void *__e1, __const void *__e2)

                       __THROW,

                       versionsort64) __attribute_pure__;

#   else

#    define versionsort versionsort64

#   endif

#  endif

#  ifdef __USE_LARGEFILE64

extern int versionsort64 (__const void *__e1, __const void *__e2)

     __THROW __attribute_pure__;

#  endif

# endif

/* 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.  */

# ifndef __USE_FILE_OFFSET64

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

                                size_t __nbytes,

                                __off_t *__restrict __basep) __THROW;

# else

#  ifdef __REDIRECT

extern __ssize_t __REDIRECT (getdirentries,

                             (int __fd, char *__restrict __buf,

                              size_t __nbytes,

                              __off64_t *__restrict __basep) __THROW,

                             getdirentries64);

#  else

#   define getdirentries getdirentries64

#  endif

# endif

# ifdef __USE_LARGEFILE64

extern __ssize_t getdirentries64 (int __fd, char *__restrict __buf,

                                  size_t __nbytes,

                                  __off64_t *__restrict __basep) __THROW;

# endif

#endif /* Use BSD or misc.  */

__END_DECLS

#endif /* dirent.h  */