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CURLOPT_XFERINFODATA(3) curl_easy_setopt options CURLOPT_XFERINFODATA(3)

CURLOPT_XFERINFODATA - pointer passed to the progress callback

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFODATA, void *pointer);

Pass a pointer that will be untouched by libcurl and passed as the first argument in the progress callback set with CURLOPT_XFERINFOFUNCTION(3).

This is an alias for CURLOPT_PROGRESSDATA(3).

The default value of this parameter is NULL.

All

 struct progress {
   char *private;
   size_t size;
 };
 static size_t progress_callback(void *clientp,
                                 curl_off_t dltotal,
                                 curl_off_t dlnow,
                                 curl_off_t ultotal,
                                 curl_off_t ulnow)
 {
   struct memory *progress = (struct progress *)userp;
   /* use the values */
   return 0; /* all is good */
 }
 struct progress data;
 /* pass struct to callback  */
 curl_easy_setopt(curl_handle, CURLOPT_XFERINFODATA, &data);
 curl_easy_setopt(curl_handle, CURLOPT_XFERINFOFUNCTION, progress_callback);

Added in 7.32.0

Returns CURLE_OK

CURLOPT_XFERINFOFUNCTION(3), CURLOPT_VERBOSE(3),
November 26, 2021 libcurl 7.83.1

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