1/* 2 * Copyright 2001-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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__) || (defined(__GLIBC__) && defined(__FreeBSD_kernel__)) 21 22# include <unistd.h> 23 24int OPENSSL_issetugid(void) 25{ 26 return issetugid(); 27} 28 29#else 30 31# include <unistd.h> 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# elif defined(__ANDROID_API__) 40/* see https://developer.android.google.cn/ndk/guides/cpu-features */ 41# if __ANDROID_API__ >= 18 42# include <sys/auxv.h> 43# define OSSL_IMPLEMENT_GETAUXVAL 44# endif 45# endif 46 47int OPENSSL_issetugid(void) 48{ 49# ifdef OSSL_IMPLEMENT_GETAUXVAL 50 return getauxval(AT_SECURE) != 0; 51# else 52 return getuid() != geteuid() || getgid() != getegid(); 53# endif 54} 55#endif 56