1/* Look up an environment variable more securely.
2
3   Copyright 2013-2014 Free Software Foundation, Inc.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU General Public License as published
7   by the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program 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   General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20#include <stdlib.h>
21
22#if !HAVE___SECURE_GETENV
23# if HAVE_ISSETUGID
24#  include <unistd.h>
25# else
26#  undef issetugid
27#  define issetugid() 1
28# endif
29#endif
30
31char *
32secure_getenv (char const *name)
33{
34#if HAVE___SECURE_GETENV
35  return __secure_getenv (name);
36#else
37  if (issetugid ())
38    return 0;
39  return getenv (name);
40#endif
41}
42