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1 /* Invoke dup, but avoid some glitches.
3 Copyright (C) 2001, 2004-2006, 2009-2017 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 /* Written by Paul Eggert. */
20 #include <config.h>
22 #include "unistd-safer.h"
24 #include <fcntl.h>
25 #include <unistd.h>
27 /* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
28 STDERR_FILENO. */
31 dup_safer (int fd)
33 return fcntl (fd, F_DUPFD, STDERR_FILENO + 1);