+
−/* Invoke tmpfile, but avoid some glitches.
+
−   Copyright (C) 2006, 2009-2011 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/>.  */
+
−
+
−/* Written by Eric Blake, based on ideas from Paul Eggert.  */
+
−
+
−#include <config.h>
+
−
+
−#include "stdio-safer.h"
+
−
+
−#include <errno.h>
+
−#include <unistd.h>
+
−#include "unistd-safer.h"
+
−
+
−#include "binary-io.h"
+
−
+
−/* Like tmpfile, but do not return stdin, stdout, or stderr.
+
−
+
−   Remember that tmpfile can leave files behind if your program calls _exit,
+
−   so this function should not be mixed with the close_stdout module.  */
+
−
+
−FILE *
+
−tmpfile_safer (void)
+
−{
+
−  FILE *fp = tmpfile ();
+
−
+
−  if (fp)
+
−    {
+
−      int fd = fileno (fp);
+
−
+
−      if (0 <= fd && fd <= STDERR_FILENO)
+
−        {
+
−          int f = dup_safer (fd);
+
−
+
−          if (f < 0)
+
−            {
+
−              int e = errno;
+
−              fclose (fp);
+
−              errno = e;
+
−              return NULL;
+
−            }
+
−
+
−          /* Keep the temporary file in binary mode, on platforms
+
−             where that matters.  */
+
−          if (fclose (fp) != 0
+
−              || ! (fp = fdopen (f, O_BINARY ? "wb+" : "w+")))
+
−            {
+
−              int e = errno;
+
−              close (f);
+
−              errno = e;
+
−              return NULL;
+
−            }
+
−        }
+
−    }
+
−
+
−  return fp;
+
−}