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-rw-r--r--lib/pipe-safer.c50
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diff --git a/lib/pipe-safer.c b/lib/pipe-safer.c
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1/* Invoke pipe, but avoid some glitches.
2 Copyright (C) 2005 Free Software Foundation, Inc.
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
7 any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17
18/* Written by Jim Meyering. */
19
20#ifdef HAVE_CONFIG_H
21# include <config.h>
22#endif
23
24#include "unistd-safer.h"
25
26#include <unistd.h>
27
28/* Like pipe, but ensure that neither of the file descriptors is
29 STDIN_FILENO, STDOUT_FILENO, or STDERR_FILENO. */
30
31int
32pipe_safer (int fd[2])
33{
34 int fail = pipe (fd);
35 if (fail)
36 return fail;
37
38 {
39 int i;
40 for (i = 0; i < 2; i++)
41 {
42 int f = fd_safer (fd[i]);
43 if (f < 0)
44 return -1;
45 fd[i] = f;
46 }
47 }
48
49 return 0;
50}