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.

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/rewinddir.c b/lib/rewinddir.c
new file mode 100644
index 0000000000..bfb91084bf
--- /dev/null
+++ b/lib/rewinddir.c
@@ -0,0 +1,49 @@
+/* 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;
+        }
+    }
+}