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 <sys/ioctl.h>
      20  
      21  /* Perform the I/O control operation specified by REQUEST on FD.
      22     The actual type and use of ARG and the return value depend on REQUEST.  */
      23  int
      24  __ioctl (int fd, unsigned long int request, ...)
      25  {
      26    __set_errno (ENOSYS);
      27    return -1;
      28  }
      29  stub_warning (ioctl)
      30  
      31  libc_hidden_def (__ioctl)
      32  weak_alias (__ioctl, ioctl)