CURLINFO_PRIVATE

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIVATE, char **private);

Pass a pointer to a char pointer to receive the pointer to the private data associated with the curl handle (set with the CURLOPT_PRIVATE(3)). Please note that for internal reasons, the value is returned as a char pointer, although effectively being a 'void *'.

All

CURL *curl = curl_easy_init();
if(curl) {
  void *pointer = 0x2345454;
  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
  /* set the private pointer */
  curl_easy_setopt(curl, CURLOPT_PRIVATE, pointer);
  ret = curl_easy_perform(curl);
  /* extract the private pointer again */
  ret = curl_easy_getinfo(curl, CURLINFO_PRIVATE, &pointer);
  curl_easy_cleanup(curl);
}

Added in 7.10.3

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

curl_easy_getinfo(3), curl_easy_setopt(3), CURLOPT_PRIVATE(3),