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CURLOPT_PROGRESSDATA(3)	   Library Functions Manual    CURLOPT_PROGRESSDATA(3)

NAME
       CURLOPT_PROGRESSDATA - pointer passed to	the progress callback

SYNOPSIS
       #include	<curl/curl.h>

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

DESCRIPTION
       Pass a pointer that is untouched	by libcurl and passed as the first ar-
       gument in the progress callback set with	CURLOPT_PROGRESSFUNCTION(3).

DEFAULT
       NULL

PROTOCOLS
       This functionality affects all supported	protocols

EXAMPLE
       struct progress {
	 char *private;
	 size_t	size;
       };

       static int progress_callback(void *clientp,
				    double dltotal,
				    double dlnow,
				    double ultotal,
				    double ulnow)
       {
	 struct	progress *memory = clientp;
	 printf("private: %p\n", memory->private);

	 /* use	the values */

	 return	0; /* all is good */
       }

       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   struct progress data;

	   /* pass struct to callback  */
	   curl_easy_setopt(curl, CURLOPT_PROGRESSDATA,	&data);
	   curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);

	   curl_easy_perform(curl);
	 }
       }

AVAILABILITY
       Added in	curl 7.1

RETURN VALUE
       curl_easy_setopt(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).

SEE ALSO
       CURLOPT_PROGRESSFUNCTION(3), CURLOPT_XFERINFOFUNCTION(3)

libcurl				  2025-06-03	       CURLOPT_PROGRESSDATA(3)

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