1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* Invoke dup, but avoid some glitches.
Copyright (C) 2001, 2004, 2005, 2006 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 <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert. */
#include <config.h>
#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)
{
#if defined F_DUPFD && !defined FCHDIR_REPLACEMENT
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
}
|
