1  /* _Fork implementation.  Generic version.
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <unistd.h>
      21  
      22  /* Clone the calling process, creating an exact copy.  Return -1 for errors,
      23     0 to the new process, and the process ID of the new process to the
      24     old process.
      25     Different than fork, this functions is marked as async-signal-safe by
      26     POSIX (by Austin Group issue 62).  */
      27  pid_t
      28  _Fork (void)
      29  {
      30    __set_errno (ENOSYS);
      31    return -1;
      32  }
      33  libc_hidden_def (_Fork)
      34  stub_warning (_Fork)