curlopt_private(3) mojave man page | unix.com

CURLOPT_PRIVATE(3)					     curl_easy_setopt options						CURLOPT_PRIVATE(3)

NAME
       CURLOPT_PRIVATE - store a private pointer

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PRIVATE, void *pointer);

DESCRIPTION
       Pass  a	void  * as parameter, pointing to data that should be associated with this curl handle.  The pointer can subsequently be retrieved
       using curl_easy_getinfo(3) with the CURLINFO_PRIVATE option. libcurl itself never does nothing with this data.

DEFAULT
       NULL

PROTOCOLS
       All

EXAMPLE
       CURL *curl = curl_easy_init();
       struct private secrets;
       if(curl) {
	 struct private *extracted;
	 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

	 /* store a pointer to our private struct */
	 curl_easy_setopt(curl, CURLOPT_PRIVATE, &secrets);

	 curl_easy_perform(curl);

	 /* we can extract the private pointer again too */
	 curl_easy_getinfo(curl, CURLINFO_PRIVATE, &extracted);
       }

AVAILABILITY
       Added in 7.10.3

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

SEE ALSO
       CURLOPT_VERBOSE(3), CURLOPT_STDERR(3),

libcurl 7.54.0							 February 03, 2016						CURLOPT_PRIVATE(3)