CURLINFO_PRIVATE(3) | Introduction to Library Functions | CURLINFO_PRIVATE(3) |
CURLINFO_PRIVATE - get the private pointer
#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 *'.
This functionality affects all supported protocols
int main(void) {
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
void *pointer = (void *)0x2345454;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
/* set the private pointer */
curl_easy_setopt(curl, CURLOPT_PRIVATE, pointer);
res = curl_easy_perform(curl);
/* extract the private pointer again */
res = curl_easy_getinfo(curl, CURLINFO_PRIVATE, &pointer);
if(res)
printf("error: %s\n", curl_easy_strerror(res));
curl_easy_cleanup(curl);
} }
Added in curl 7.10.3
curl_easy_getinfo(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).
CURLOPT_PRIVATE(3), curl_easy_getinfo(3), curl_easy_setopt(3)
2025-05-02 | libcurl |