posix/fork.c

   1 /* Copyright (C) 1991-2020 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
  21
  22 /* Clone the calling process, creating an exact copy.
  23    Return -1 for errors, 0 to the new process,
  24    and the process ID of the new process to the old process.  */
  25 int
  26 __fork (void)
  27 {
  28   __set_errno (ENOSYS);
  29   return -1;
  30 }
  31 libc_hidden_def (__fork)
  32 stub_warning (fork)
  33
  34 weak_alias (__fork, fork)