lib/pipe.c

   1 /* Create a pipe.
   2    Copyright (C) 2009-2020 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 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
  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