Home | History | Annotate | Line # | Download | only in import 
      1 /* Create a pipe.
      2    Copyright (C) 2009-2022 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
     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