1 /* Create a pipe.
2 Copyright (C) 2009-2021 Free Software Foundation, Inc.
3
4 This file is free software: you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 This file 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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 /* Specification. */
20 #include <unistd.h>
21
22 #if defined _WIN32 && ! defined __CYGWIN__
23 /* Native Windows API. */
24
25 /* Get _pipe(). */
26 # include <io.h>
27
28 /* Get _O_BINARY. */
29 # include <fcntl.h>
30
31 int
pipe(int fd[2])32 pipe (int fd[2])
33 {
34 /* Mingw changes fd to {-1,-1} on failure, but this violates
35 http://austingroupbugs.net/view.php?id=467 */
36 int tmp[2];
37 int result = _pipe (tmp, 4096, _O_BINARY);
38 if (!result)
39 {
40 fd[0] = tmp[0];
41 fd[1] = tmp[1];
42 }
43 return result;
44 }
45
46 #else
47
48 # error "This platform lacks a pipe function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib."
49
50 #endif
51