/* Invoke dup, but avoid some glitches. Copyright (C) 2001, 2004-2006, 2009-2020 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 <https://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) { return fcntl (fd, F_DUPFD, STDERR_FILENO + 1); } |