113498266Sopenharmony_ci/*************************************************************************** 213498266Sopenharmony_ci * _ _ ____ _ 313498266Sopenharmony_ci * Project ___| | | | _ \| | 413498266Sopenharmony_ci * / __| | | | |_) | | 513498266Sopenharmony_ci * | (__| |_| | _ <| |___ 613498266Sopenharmony_ci * \___|\___/|_| \_\_____| 713498266Sopenharmony_ci * 813498266Sopenharmony_ci * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 913498266Sopenharmony_ci * 1013498266Sopenharmony_ci * This software is licensed as described in the file COPYING, which 1113498266Sopenharmony_ci * you should have received as part of this distribution. The terms 1213498266Sopenharmony_ci * are also available at https://curl.se/docs/copyright.html. 1313498266Sopenharmony_ci * 1413498266Sopenharmony_ci * You may opt to use, copy, modify, merge, publish, distribute and/or sell 1513498266Sopenharmony_ci * copies of the Software, and permit persons to whom the Software is 1613498266Sopenharmony_ci * furnished to do so, under the terms of the COPYING file. 1713498266Sopenharmony_ci * 1813498266Sopenharmony_ci * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 1913498266Sopenharmony_ci * KIND, either express or implied. 2013498266Sopenharmony_ci * 2113498266Sopenharmony_ci * SPDX-License-Identifier: curl 2213498266Sopenharmony_ci * 2313498266Sopenharmony_ci ***************************************************************************/ 2413498266Sopenharmony_ci 2513498266Sopenharmony_ci#include "curl_setup.h" 2613498266Sopenharmony_ci 2713498266Sopenharmony_ci#include <curl/curl.h> 2813498266Sopenharmony_ci#include "curl_memory.h" 2913498266Sopenharmony_ci 3013498266Sopenharmony_ci#include "memdebug.h" 3113498266Sopenharmony_ci 3213498266Sopenharmony_cistatic char *GetEnv(const char *variable) 3313498266Sopenharmony_ci{ 3413498266Sopenharmony_ci#if defined(_WIN32_WCE) || defined(CURL_WINDOWS_APP) || \ 3513498266Sopenharmony_ci defined(__ORBIS__) || defined(__PROSPERO__) /* PlayStation 4 and 5 */ 3613498266Sopenharmony_ci (void)variable; 3713498266Sopenharmony_ci return NULL; 3813498266Sopenharmony_ci#elif defined(_WIN32) 3913498266Sopenharmony_ci /* This uses Windows API instead of C runtime getenv() to get the environment 4013498266Sopenharmony_ci variable since some changes aren't always visible to the latter. #4774 */ 4113498266Sopenharmony_ci char *buf = NULL; 4213498266Sopenharmony_ci char *tmp; 4313498266Sopenharmony_ci DWORD bufsize; 4413498266Sopenharmony_ci DWORD rc = 1; 4513498266Sopenharmony_ci const DWORD max = 32768; /* max env var size from MSCRT source */ 4613498266Sopenharmony_ci 4713498266Sopenharmony_ci for(;;) { 4813498266Sopenharmony_ci tmp = realloc(buf, rc); 4913498266Sopenharmony_ci if(!tmp) { 5013498266Sopenharmony_ci free(buf); 5113498266Sopenharmony_ci return NULL; 5213498266Sopenharmony_ci } 5313498266Sopenharmony_ci 5413498266Sopenharmony_ci buf = tmp; 5513498266Sopenharmony_ci bufsize = rc; 5613498266Sopenharmony_ci 5713498266Sopenharmony_ci /* It's possible for rc to be 0 if the variable was found but empty. 5813498266Sopenharmony_ci Since getenv doesn't make that distinction we ignore it as well. */ 5913498266Sopenharmony_ci rc = GetEnvironmentVariableA(variable, buf, bufsize); 6013498266Sopenharmony_ci if(!rc || rc == bufsize || rc > max) { 6113498266Sopenharmony_ci free(buf); 6213498266Sopenharmony_ci return NULL; 6313498266Sopenharmony_ci } 6413498266Sopenharmony_ci 6513498266Sopenharmony_ci /* if rc < bufsize then rc is bytes written not including null */ 6613498266Sopenharmony_ci if(rc < bufsize) 6713498266Sopenharmony_ci return buf; 6813498266Sopenharmony_ci 6913498266Sopenharmony_ci /* else rc is bytes needed, try again */ 7013498266Sopenharmony_ci } 7113498266Sopenharmony_ci#else 7213498266Sopenharmony_ci char *env = getenv(variable); 7313498266Sopenharmony_ci return (env && env[0])?strdup(env):NULL; 7413498266Sopenharmony_ci#endif 7513498266Sopenharmony_ci} 7613498266Sopenharmony_ci 7713498266Sopenharmony_cichar *curl_getenv(const char *v) 7813498266Sopenharmony_ci{ 7913498266Sopenharmony_ci return GetEnv(v); 8013498266Sopenharmony_ci} 81