sysdeps/generic/enbl-secure.c

   1 /* Define and initialize the `__libc_enable_secure' flag.  Generic version.
   2 Copyright (C) 1996 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 /* This file is used in the static libc.  For the shared library,
  21    dl-sysdep.c defines and initializes __libc_enable_secure.  */
  22
  23 #include <unistd.h>
  24
  25
  26 /* Safest assumption, if somehow the initializer isn't run.  */
  27 int __libc_enable_secure = 1;
  28
  29 static void __attribute__ ((unused, constructor))
  30 init_secure (void)
  31 {
  32   __libc_enable_secure = (__geteuid () != __getuid () ||
  33                           __getegid () != __getgid ());
  34 }