| 1 | /* Invoke dup, but avoid some glitches. |
| 2 | |
| 3 | Copyright (C) 2001, 2004-2006, 2009-2019 Free Software Foundation, Inc. |
| 4 | |
| 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. |
| 9 | |
| 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. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* Written by Paul Eggert. */ |
| 19 | |
| 20 | #include <config.h> |
| 21 | |
| 22 | #include "unistd-safer.h" |
| 23 | |
| 24 | #include <fcntl.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | /* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or |
| 28 | STDERR_FILENO. */ |
| 29 | |
| 30 | int |
| 31 | dup_safer (int fd) |
| 32 | { |
| 33 | return fcntl (fd, F_DUPFD, STDERR_FILENO + 1); |
| 34 | } |