util.h revision a551a712 
1/*
2 * Copyright (c) 2015 NVIDIA Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24#ifdef HAVE_CONFIG_H
25#include "config.h"
26#endif
27
28#include <unistd.h>
29#include <stdlib.h>
30
31static char * getenv_wrapper(const char *name)
32{
33    if (getuid() == geteuid() && getgid() == getegid()) {
34        return getenv(name);
35    }
36    else {
37        return NULL;
38    }
39}
40
41#if 0 // Just substituting it for the above equivalent
42#  ifdef HAVE___SECURE_GETENV
43#    define secure_getenv __secure_getenv
44#  else
45#    warning Neither secure_getenv nor __secure_getenv is available.
46#    define secure_getenv getenv_wrapper
47#  endif
48#endif
49