getenv.c revision 340704 
1/*
2 * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#ifndef _GNU_SOURCE
11# define _GNU_SOURCE
12#endif
13
14#include <stdlib.h>
15#include "cryptlib.h"
16
17char *ossl_safe_getenv(const char *name)
18{
19#if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
20# if __GLIBC_PREREQ(2, 17)
21#  define SECURE_GETENV
22    return secure_getenv(name);
23# endif
24#endif
25
26#ifndef SECURE_GETENV
27    if (OPENSSL_issetugid())
28        return NULL;
29    return getenv(name);
30#endif
31}
32