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 | } |
35 | |