lib/closedir.c

   1 /* Stop reading the entries of a directory.
   2    Copyright (C) 2006-2024 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 2.1 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 #if REPLACE_FCHDIR
  23 # include <unistd.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27
  28 #if HAVE_CLOSEDIR
  29
  30 /* Override closedir(), to keep track of the open file descriptors.
  31    Needed because there is a function dirfd().  */
  32
  33 #endif
  34
  35 #if GNULIB_defined_DIR
  36 # include "dirent-private.h"
  37 #endif
  38
  39 int
  40 closedir (DIR *dirp)
  41 #undef closedir
  42 {
  43 #if GNULIB_defined_DIR || REPLACE_FCHDIR
  44   int fd = dirfd (dirp);
  45 #endif
  46   int retval;
  47
  48 #if HAVE_DIRENT_H                       /* equivalent to HAVE_CLOSEDIR */
  49
  50 # if GNULIB_defined_DIR
  51   retval = closedir (dirp->real_dirp);
  52   if (retval >= 0)
  53     free (dirp);
  54 # else
  55   retval = closedir (dirp);
  56 # endif
  57
  58 #else
  59
  60   if (dirp->current != INVALID_HANDLE_VALUE)
  61     FindClose (dirp->current);
  62   free (dirp);
  63
  64   retval = 0;
  65
  66 #endif
  67
  68 #if GNULIB_defined_DIR
  69   if (retval >= 0)
  70     close (fd);
  71 #elif REPLACE_FCHDIR
  72   if (retval >= 0)
  73     _gl_unregister_fd (fd);
  74 #endif
  75
  76   return retval;
  77 }