**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
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* | (__| |_| | _ <| |___
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*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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* This software is licensed as described in the file COPYING, which
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* are also available at https://curl.haxx.se/docs/copyright.html.
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* furnished to do so, under the terms of the COPYING file.
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**************************************************************************

CURLOPT_DNS_USE_GLOBAL_CACHE - enable/disable global DNS cache #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE, long enable); Has no function since 7.62.0. Do note use! Pass a long. If the enable value is 1, it tells curl to use a global DNS cache that will survive between easy handle creations and deletions. This is not thread-safe and this will use a global variable. WARNING: this option is considered obsolete. Stop using it. Switch over to using the share interface instead! See CURLOPT_SHARE(3) and curl_share_init(3). 0 All

CURL *curl = curl_easy_init();
if(curl) {
 CURLcode ret;
 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
 /* switch off the use of a global, thread unsafe, cache */
 curl_easy_setopt(curl, CURLOPT_DNS_USE_GLOBAL_CACHE, 0L);
 ret = curl_easy_perform(curl);
 curl_easy_cleanup(curl);
}

Deprecated since 7.62.0. Has no function. Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. CURLOPT_SHARE "(3), " CURLOPT_DNS_CACHE_TIMEOUT "(3), "