added missing file fchmodat.c to openat module

[Paul Eggert]

I installed this:

2006-08-19  Paul Eggert  <address@hidden>

        * modules/openat (Files): Add lib/fchmodat.c.
        * lib/fchmodat.c: New file, from coreutils.  This was inadvertently
        omitted in the 2006-08-17 update.  Problem reported by Jay Youngman.

--- modules/openat      17 Aug 2006 20:34:21 -0000      1.8
+++ modules/openat      19 Aug 2006 22:16:14 -0000
@@ -3,6 +3,7 @@ Open a file at a directory.
 
 Files:
 lib/at-func.c
+lib/fchmodat.c
 lib/mkdirat.c
 lib/openat.c
 lib/openat.h
--- /dev/null   2005-09-24 22:00:15.000000000 -0700
+++ lib/fchmodat.c      2006-08-19 15:10:14.000000000 -0700
@@ -0,0 +1,52 @@
+/* Change the protections of file relative to an open directory.
+   Copyright (C) 2006 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 2, 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, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* written by Jim Meyering */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "openat.h"
+#include "dirname.h" /* solely for definition of IS_ABSOLUTE_FILE_NAME */
+#include "save-cwd.h"
+#include "openat-priv.h"
+
+#ifndef HAVE_LCHMOD
+/* Use a different name, to avoid conflicting with any
+   system-supplied declaration.  */
+# undef lchmod
+# define lchmod lchmod_rpl
+static int lchmod (char const *f, mode_t m) { errno = ENOSYS; return -1; }
+#endif
+
+/* Solaris 10 has no function like this.
+   Invoke chmod or lchmod on file, FILE, using mode MODE, in the directory
+   open on descriptor FD.  If possible, do it without changing the
+   working directory.  Otherwise, resort to using save_cwd/fchdir,
+   then mkdir/restore_cwd.  If either the save_cwd or the restore_cwd
+   fails, then give a diagnostic and exit nonzero.
+   Note that an attempt to use a FLAG value of AT_SYMLINK_NOFOLLOW
+   on a system without lchmod support causes this function to fail.  */
+
+#define AT_FUNC_NAME fchmodat
+#define AT_FUNC_F1 lchmod
+#define AT_FUNC_F2 chmod
+#define AT_FUNC_USE_F1_COND flag == AT_SYMLINK_NOFOLLOW
+#define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, int flag
+#define AT_FUNC_POST_FILE_ARGS        , mode
+#include "at-func.c"