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6ec2e0f5 SDJ |
1 | /* Invoke dup, but avoid some glitches. |
2 | ||
5e8754f9 | 3 | Copyright (C) 2001, 2004-2006, 2009-2016 Free Software Foundation, Inc. |
6ec2e0f5 SDJ |
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 | |
5e8754f9 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
6ec2e0f5 SDJ |
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 | } |