glibc/sysdeps/generic/enbl-secure.c

/* Define and initialize the `__libc_enable_secure' flag.  Generic version.
   Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* This file is used in the static libc.  For the shared library,
   dl-sysdep.c defines and initializes __libc_enable_secure.  */

#include <unistd.h>
#include <libc-internal.h>

/* Safest assumption, if somehow the initializer isn't run.  */
int __libc_enable_secure = 1;

void
__libc_init_secure (void)
{
  __libc_enable_secure = (__geteuid () != __getuid ()
			  || __getegid () != __getgid ());
}