New modules 'opendir', 'readdir', 'rewinddir', 'closedir'. * lib/dirent.in.h (struct dirent): New type. (DT_UNKNOWN, DT_FIFO, DT_CHR, DT_DIR, DT_BLK, DT_REG, DT_LNK, DT_SOCK, DT_WHT): New macros. (DIR): New type. (opendir, closedir): Declare only if the module 'opendir' is enabled. (readdir, rewinddir): New declarations. * lib/dirent-private.h: New file. * lib/opendir.c: New file. * lib/readdir.c: New file. * lib/rewinddir.c: New file. * lib/closedir.c: New file. * lib/fchdir.c (rpl_closedir, rpl_opendir): Remove functions. * m4/opendir.m4: New file. * m4/readdir.m4: New file. * m4/rewinddir.m4: New file. * m4/closedir.m4: New file. * m4/fchdir.m4 (gl_FUNC_FCHDIR): Don't set REPLACE_OPENDIR, REPLACE_CLOSEDIR here. * m4/dirent_h.m4 (gl_DIRENT_H): Also check whether closedir, opendir, readdir, rewinddir are declared. (gl_DIRENT_H_DEFAULTS): Initialize GNULIB_OPENDIR, GNULIB_READDIR, GNULIB_REWINDDIR, GNULIB_CLOSEDIR, HAVE_OPENDIR, HAVE_READDIR, HAVE_REWINDDIR, HAVE_CLOSEDIR. * modules/dirent (Makefile.am): Substitute GNULIB_OPENDIR, GNULIB_READDIR, GNULIB_REWINDDIR, GNULIB_CLOSEDIR, HAVE_OPENDIR, HAVE_READDIR, HAVE_REWINDDIR, HAVE_CLOSEDIR. * modules/opendir: New file. * modules/readdir: New file. * modules/rewinddir: New file. * modules/closedir: New file. * doc/posix-functions/opendir.texi: Mention the 'opendir' module. * doc/posix-functions/readdir.texi: Mention the 'readdir' module. * doc/posix-functions/rewinddir.texi: Mention the 'rewinddir' module. * doc/posix-functions/closedir.texi: Mention the 'closedir' module. * NEWS: Mention the 'fchdir' change.

/* Restart reading the entries of a directory from the beginning.
   Copyright (C) 2011 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include <dirent.h>

#include <errno.h>

#include "dirent-private.h"

void
rewinddir (DIR *dirp)
{
  /* Like in closedir().  */
  if (dirp->current != INVALID_HANDLE_VALUE)
    FindClose (dirp->current);

  /* Like in opendir().  */
  dirp->status = -1;
  dirp->current = FindFirstFile (dirp->dir_name_mask, &dirp->entry);
  if (dirp->current == INVALID_HANDLE_VALUE)
    {
      switch (GetLastError ())
        {
        case ERROR_FILE_NOT_FOUND:
          dirp->status = -2;
          break;
        default:
          /* Save the error code for the next readdir() call.  */
          dirp->status = ENOENT;
          break;
        }
    }
}