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CURLOPT_DN...OBAL_CACHE(3) Library Functions Manual CURLOPT_DN...OBAL_CACHE(3) NAME CURLOPT_DNS_USE_GLOBAL_CACHE - global DNS cache SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE, long enable); DESCRIPTION Has no function since 7.62.0. Do not use. Pass a long. If the enable value is 1, it tells curl to use a global DNS cache that survives between easy handle creations and deletions. This is not thread-safe and this uses a global variable. See CURLOPT_SHARE(3) and curl_share_init(3) for the correct way to share DNS cache between transfers. DEFAULT 0 PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; 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); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } DEPRECATED Deprecated since 7.11.1. Functionality removed in 7.62.0. AVAILABILITY Added in curl 7.9.3 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_DNS_CACHE_TIMEOUT(3), CURLOPT_SHARE(3) libcurl 2026-07-30 CURLOPT_DN...OBAL_CACHE(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | DEPRECATED | AVAILABILITY | RETURN VALUE | SEE ALSO
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