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
created 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_setopt(3) for details.
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.
Warning: adding a share and then setting it to NULL while the transfer is
ongoing is discouraged and may lead to undefined behavior.
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 result;
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);
result = 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);
result = 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 2026-10-18 CURLOPT_SHARE(3)
curl 8.23.0 - Generated Sun Oct 18 18:19:50 CDT 2026