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CURLOPT_DNS_USE_GLOBAL_CACHE(3)                       curl_easy_setopt options

NAME

CURLOPT_DNS_USE_GLOBAL_CACHE - enable/disable 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 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).

DEFAULT

0

PROTOCOLS

All

EXAMPLE

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); }

AVAILABILITY

Deprecated since 7.62.0. Has no function.

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

CURLOPT_SHARE(3), CURLOPT_DNS_CACHE_TIMEOUT(3), libcurl 7.65.1 March 7, 2019 CURLOPT_DNS_USE_GLOBAL_CACHE(3)

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