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diff --git a/lib/mkdirat.c b/lib/mkdirat.c
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+++ b/lib/mkdirat.c
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+/* fd-relative mkdir
+   Copyright (C) 2005-2006, 2009-2010 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/>.  */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+
+#include <unistd.h>
+
+/* Solaris 10 has no function like this.
+   Create a subdirectory, FILE, with 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.  */
+
+#define AT_FUNC_NAME mkdirat
+#define AT_FUNC_F1 mkdir
+#define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode
+#define AT_FUNC_POST_FILE_ARGS        , mode
+#include "at-func.c"