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CURLOPT_TRAILERDATA(3)	   Library Functions Manual	CURLOPT_TRAILERDATA(3)

NAME
       CURLOPT_TRAILERDATA - pointer passed to trailing	headers	callback

SYNOPSIS
       #include	<curl.h>

       CURLcode	curl_easy_setopt(CURL *handle, CURLOPT_TRAILERDATA, void *userdata);

DESCRIPTION
       Data pointer to be passed to the	HTTP trailer callback function.

DEFAULT
       NULL

PROTOCOLS
       This functionality affects http only

EXAMPLE
       struct MyData {
	 void *custom;
       };

       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   struct MyData data;
	   curl_easy_setopt(curl, CURLOPT_TRAILERDATA, &data);
	 }
       }

AVAILABILITY
       Added in	curl 7.64.0

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_TRAILERFUNCTION(3), CURLOPT_WRITEFUNCTION(3)

libcurl				  2025-06-03		CURLOPT_TRAILERDATA(3)

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