1/*
2 * Copyright 2001-2019 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#include <openssl/crypto.h>
11#include <openssl/opensslconf.h>
12
13#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)
14
15int OPENSSL_issetugid(void)
16{
17    return 0;
18}
19
20#elif defined(__OpenBSD__) || (defined(__FreeBSD__) && __FreeBSD__ > 2) || defined(__DragonFly__)
21
22# include OPENSSL_UNISTD
23
24int OPENSSL_issetugid(void)
25{
26    return issetugid();
27}
28
29#else
30
31# include OPENSSL_UNISTD
32# include <sys/types.h>
33
34# if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
35#  if __GLIBC_PREREQ(2, 16)
36#   include <sys/auxv.h>
37#   define OSSL_IMPLEMENT_GETAUXVAL
38#  endif
39# endif
40
41int OPENSSL_issetugid(void)
42{
43# ifdef OSSL_IMPLEMENT_GETAUXVAL
44    return getauxval(AT_SECURE) != 0;
45# else
46    return getuid() != geteuid() || getgid() != getegid();
47# endif
48}
49#endif
50