NAME

       CURLOPT_DEBUGDATA - pointer passed to the debug callback

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       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.

DEFAULT

       NULL

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       struct data {
         void *custom;
       };

       static int my_trace(CURL *handle, curl_infotype type,
                           char *data, size_t size,
                           void *clientp)
       {
         struct data *mine = clientp;
         printf("our ptr: %p\n", mine->custom);

         /* output debug info */
       }

       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;
       }

AVAILABILITY

       Added in curl 7.9.6

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLOPT_DEBUGFUNCTION(3), CURLOPT_STDERR(3)