Manpages - CURLOPT_DEBUGDATA.3

CURLOPT_DEBUGDATA - pointer passed to the debug callback

#include <curl/curl.h>

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

Pass a pointer to whatever you want passed in to your CURLOPT_DEBUGFUNCTION(3) in the last void * argument. This pointer is not used by libcurl, it is only passed to the callback.

NULL

All

  int main(void)
  {
    CURL *curl;
    CURLcode res;
    struct data my_tracedata;

    curl = curl_easy_init();
    if(curl) {
      curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);

      curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &my_tracedata);

      /* the DEBUGFUNCTION has no effect until we enable VERBOSE */
      curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

      curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
      res = curl_easy_perform(curl);

      /* always cleanup */
      curl_easy_cleanup(curl);
    }
    return 0;
  }

Always

Returns CURLE_OK

*CURLOPT_STDERR*(3), *CURLOPT_DEBUGFUNCTION*(3),