+
−/* Invoke dup, but avoid some glitches.
+
−
+
−   Copyright (C) 2001, 2004, 2005, 2006, 2009 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 Paul Eggert.  */
+
−
+
−#include <config.h>
+
−
+
−#include "unistd-safer.h"
+
−
+
−#include <fcntl.h>
+
−
+
−#include <unistd.h>
+
−
+
−/* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or
+
−   STDERR_FILENO.  */
+
−
+
−int
+
−dup_safer (int fd)
+
−{
+
−#if defined F_DUPFD && !REPLACE_FCHDIR
+
−  return fcntl (fd, F_DUPFD, STDERR_FILENO + 1);
+
−#else
+
−  /* fd_safer calls us back, but eventually the recursion unwinds and
+
−     does the right thing.  */
+
−  return fd_safer (dup (fd));
+
−#endif
+
−}