1 /* Invoke tmpfile, but avoid some glitches.
2 Copyright (C) 2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Eric Blake, based on ideas from Paul Eggert. */
22 #include "stdio-safer.h"
26 #include "unistd-safer.h"
28 #include "binary-io.h"
31 # define STDERR_FILENO 2
34 /* Like tmpfile, but do not return stdin, stdout, or stderr.
36 Remember that tmpfile can leave files behind if your program calls _exit,
37 so this function should not be mixed with the close_stdout module. */
42 FILE *fp = tmpfile ();
48 if (0 <= fd && fd <= STDERR_FILENO)
50 int f = dup_safer (fd);
60 /* Keep the temporary file in binary mode, on platforms
61 where that matters. */
63 || ! (fp = fdopen (f, O_BINARY ? "wb+" : "w+")))