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.TH CURLOPT_DNS_USE_GLOBAL_CACHE 3 "November 04, 2020" "libcurl 7.74.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_DNS_USE_GLOBAL_CACHE \- enable/disable global DNS cache
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DNS_USE_GLOBAL_CACHE,
                          long enable);
.SH DESCRIPTION
Has no function since 7.62.0. Do not use!

Pass a long. If the \fIenable\fP 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.

\fBWARNING:\fP this option is considered obsolete. Stop using it. Switch over
to using the share interface instead! See \fICURLOPT_SHARE(3)\fP and
\fIcurl_share_init(3)\fP.
.SH DEFAULT
0
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Deprecated since 7.62.0. Has no function.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_SHARE "(3), " CURLOPT_DNS_CACHE_TIMEOUT "(3), "