1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library 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 GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <unistd.h>
      20  #include <stddef.h>
      21  
      22  /* Create a one-way communication channel (__pipe).  If successful,
      23     two file descriptors are stored in PIPEDES; bytes written on
      24     PIPEDES[1] can be read from PIPEDES[0].  Apply FLAGS to the new
      25     file descriptors.  Returns 0 if successful, -1 if not.  */
      26  int
      27  __pipe2 (int pipedes[2], int flags)
      28  {
      29    if (pipedes == NULL)
      30      {
      31        __set_errno (EINVAL);
      32        return -1;
      33      }
      34  
      35    __set_errno (ENOSYS);
      36    return -1;
      37  }
      38  weak_alias (__pipe2, pipe2)
      39  stub_warning (pipe2)