CURLOPT_READDATA(3)        curl_easy_setopt options        CURLOPT_READDATA(3)

NAME
       CURLOPT_READDATA - custom pointer passed to the read callback

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       Data pointer to pass to the file read function. If  you  use  the  CUR-
       LOPT_READFUNCTION(3) option, this is the pointer you'll get as input in
       the 4th argument to the callback.

       If you don't specify a read callback but instead rely  on  the  default
       internal read function, this data must be a valid readable FILE * (cast
       to 'void *').

       If you're using libcurl as a win32 DLL, you MUST  use  a  CURLOPT_READ-
       FUNCTION(3) if you set this option.

DEFAULT
       By default, this is a FILE * to stdin.

PROTOCOLS
       This is used for all protocols when sending data.

EXAMPLE
       CURL *curl = curl_easy_init();
       struct MyData this;
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

         /* pass pointer that gets passed in to the
            CURLOPT_READFUNCTION callback */
         curl_easy_setopt(curl, CURLOPT_READDATA, &this);

         curl_easy_perform(curl);
       }

AVAILABILITY
       This  option  was once known by the older name CURLOPT_INFILE, the name
       CURLOPT_READDATA(3) was introduced in 7.9.7.

RETURN VALUE
       This will return CURLE_OK.

SEE ALSO
       CURLOPT_READFUNCTION(3), CURLOPT_WRITEDATA(3),

libcurl 7.54.0                   May 01, 2016              CURLOPT_READDATA(3)