/* Invoke dup, but avoid some glitches. Copyright (C) 2001, 2004, 2005 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Paul Eggert. */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include "unistd-safer.h" #include <fcntl.h> #include <unistd.h> #ifndef STDERR_FILENO # define STDERR_FILENO 2 #endif /* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO. */ int dup_safer (int fd) { #ifdef F_DUPFD 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 }