lib/rewinddir.c

   1 /* Restart reading the entries of a directory from the beginning.
   2    Copyright (C) 2011-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation, either version 3 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <dirent.h>
  21
  22 #include <errno.h>
  23
  24 #if GNULIB_defined_DIR
  25 # include "dirent-private.h"
  26 #endif
  27
  28 /* Don't assume that UNICODE is not defined.  */
  29 #undef FindFirstFile
  30 #define FindFirstFile FindFirstFileA
  31
  32 void
  33 rewinddir (DIR *dirp)
  34 #undef rewinddir
  35 {
  36 #if HAVE_DIRENT_H                       /* equivalent to HAVE_REWINDDIR */
  37   rewinddir (dirp->real_dirp);
  38 #else
  39   /* Like in closedir().  */
  40   if (dirp->current != INVALID_HANDLE_VALUE)
  41     FindClose (dirp->current);
  42
  43   /* Like in opendir().  */
  44   dirp->status = -1;
  45   dirp->current = FindFirstFile (dirp->dir_name_mask, &dirp->entry);
  46   if (dirp->current == INVALID_HANDLE_VALUE)
  47     {
  48       switch (GetLastError ())
  49         {
  50         case ERROR_FILE_NOT_FOUND:
  51           dirp->status = -2;
  52           break;
  53         default:
  54           /* Save the error code for the next readdir() call.  */
  55           dirp->status = ENOENT;
  56           break;
  57         }
  58     }
  59 #endif
  60 }