1 /* Invoke dup, but avoid some glitches.
3 Copyright (C) 2001, 2004, 2005, 2006 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 2, or (at your option)
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, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* Written by Paul Eggert. */
23 #include "unistd-safer.h"
29 # define STDERR_FILENO 2
32 /* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
39 return fcntl (fd, F_DUPFD, STDERR_FILENO + 1);
41 /* fd_safer calls us back, but eventually the recursion unwinds and
42 does the right thing. */
43 return fd_safer (dup (fd));