io/fcntl.c

   1 /* Copyright (C) 1991-2021 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 <fcntl.h>
  20
  21 /* Perform file control operations on FD.  */
  22 int
  23 __fcntl (int fd, int cmd, ...)
  24 {
  25   if (fd < 0)
  26     {
  27       __set_errno (EBADF);
  28       return -1;
  29     }
  30
  31   __set_errno (ENOSYS);
  32   return -1;
  33 }
  34 libc_hidden_def (__fcntl)
  35 stub_warning (fcntl)
  36
  37 weak_alias (__fcntl, fcntl)