crypto/getenv.c

   1 /*
   2  * Copyright 2018 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 #ifndef _GNU_SOURCE
  11 # define _GNU_SOURCE
  12 #endif
  13
  14 #include <stdlib.h>
  15 #include "internal/cryptlib.h"
  16
  17 char *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 }