new file mode 100644
--- /dev/null
+++ b/liboctave/tempnam.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef HAVE_TEMPNAM
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+extern char *__stdio_gen_tempname (const char *dir, const char *pfx,
+				   int dir_search, size_t *lenptr,
+				   FILE **streamptr);
+
+/* Generate a unique temporary filename using up to five characters of PFX
+   if it is not NULL.  The directory to put this file in is searched for
+   as follows: First the environment variable "TMPDIR" is checked.
+   If it contains the name of a writable directory, that directory is used.
+   If not and if DIR is not NULL, that value is checked.  If that fails,
+   P_tmpdir is tried and finally "/tmp".  The storage for the filename
+   is allocated by `malloc'.  */
+char *
+tempnam (const char *dir, const char *pfx)
+{
+  size_t len;
+  register char *s;
+  register char *t = __stdio_gen_tempname(dir, pfx, 1, &len, (FILE **) NULL);
+
+  if (t == NULL)
+    return NULL;
+
+  s = (char *) malloc(len);
+  if (s == NULL)
+    return NULL;
+
+  (void) memcpy(s, t, len);
+  return s;
+}
+
+#endif