1 /* Create a pipe.
2    Copyright (C) 2009-2021 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 Lesser 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 Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public License along
15    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