62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/* Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3, or (at your option)
|
|
any later version.
|
|
|
|
GCC 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 General Public License for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SECURE_GETENV_H
|
|
#define _SECURE_GETENV_H 1
|
|
|
|
/* Secure getenv() which returns NULL if running as SUID/SGID. */
|
|
#ifndef HAVE_SECURE_GETENV
|
|
#if defined (HAVE_UNISTD_H) && defined (HAVE_GETUID) \
|
|
&& defined (HAVE_GETEUID) && defined (HAVE_GETGID) \
|
|
&& defined (HAVE_GETEGID)
|
|
|
|
#include <unistd.h>
|
|
|
|
#if SUPPORTS_WEAKREF && defined (HAVE___SECURE_GETENV)
|
|
static char* weak_secure_getenv (const char*)
|
|
__attribute__((__weakref__("__secure_getenv")));
|
|
#endif
|
|
|
|
/* Implementation of secure_getenv() for targets where it is not provided but
|
|
we have at least means to test real and effective IDs. */
|
|
|
|
static inline char *
|
|
secure_getenv (const char *name)
|
|
{
|
|
#if SUPPORTS_WEAKREF && defined (HAVE___SECURE_GETENV)
|
|
if (weak_secure_getenv)
|
|
return weak_secure_getenv (name);
|
|
#endif
|
|
|
|
if ((getuid () == geteuid ()) && (getgid () == getegid ()))
|
|
return getenv (name);
|
|
else
|
|
return NULL;
|
|
}
|
|
#else
|
|
#define secure_getenv getenv
|
|
#endif
|
|
#endif
|
|
|
|
#endif /* _SECURE_GETENV_H. */
|