stdlib/getrandom.c

   1 /* Stub for getrandom.
   2    Copyright (C) 2016-2022 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 <sys/random.h>
  20 #include <errno.h>
  21
  22 /* Write up to LENGTH bytes of randomness starting at BUFFER.
  23    Return the number of bytes written, or -1 on error.  */
  24 ssize_t
  25 __getrandom (void *buffer, size_t length, unsigned int flags)
  26 {
  27   __set_errno (ENOSYS);
  28   return -1;
  29 }
  30 stub_warning (getrandom)
  31
  32 libc_hidden_def (__getrandom)
  33 weak_alias (__getrandom, getrandom)