CURLOPT_SHARE(3) Library Functions Manual CURLOPT_SHARE(3)
NAME
CURLOPT_SHARE - share handle to use
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SHARE, CURLSH *share);
DESCRIPTION
Pass a share handle as a parameter. The share handle must have been cre-
ated by a previous call to curl_share_init(3). Setting this option,
makes this curl handle use the data from the shared handle instead of
keeping the data to itself. This enables several curl handles to share
data. If the curl handles are used simultaneously in multiple threads,
you MUST use the locking methods in the share handle. See curl_share_se-
topt(3) for details.
If you add a share that is set to share cookies, your easy handle uses
that cookie cache and get the cookie engine enabled. If you stop sharing
an object that was using cookies (or change to another object that does
not share cookies), the easy handle gets its cookie engine disabled.
Data that the share object is not set to share is dealt with the usual
way, as if no share was used.
Set this option to NULL again to stop using that share object.
DEFAULT
NULL
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
CURL *curl2 = curl_easy_init(); /* a second handle */
if(curl) {
CURLcode res;
CURLSH *shobject = curl_share_init();
curl_share_setopt(shobject, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "");
curl_easy_setopt(curl, CURLOPT_SHARE, shobject);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
/* the second handle shares cookies from the first */
curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/second");
curl_easy_setopt(curl2, CURLOPT_COOKIEFILE, "");
curl_easy_setopt(curl2, CURLOPT_SHARE, shobject);
res = curl_easy_perform(curl2);
curl_easy_cleanup(curl2);
curl_share_cleanup(shobject);
}
}
AVAILABILITY
Added in curl 7.10
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_COOKIE(3), CURLSHOPT_SHARE(3)
libcurl 2026-07-12 CURLOPT_SHARE(3)
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