CURLOPT_WRITEDATA(3)       curl_easy_setopt options       CURLOPT_WRITEDATA(3)

NAME
       CURLOPT_WRITEDATA - custom pointer passed to the write callback

SYNOPSIS
       #include <curl/curl.h>

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

DESCRIPTION
       A data pointer to pass to the write  callback.  If  you  use  the  CUR-
       LOPT_WRITEFUNCTION(3)  option,  this  is the pointer you'll get in that
       callback's 4th argument. If you don't use a write  callback,  you  must
       make pointer a 'FILE *' (cast to 'void *') as libcurl will pass this to
       fwrite(3) when writing data.

       The internal CURLOPT_WRITEFUNCTION(3) will write the data to the FILE *
       given with this option, or to stdout if this option hasn't been set.

       If you're using libcurl as a win32 DLL, you MUST use the CURLOPT_WRITE-
       FUNCTION(3) if you set this option or you will experience crashes.

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

PROTOCOLS
       Used for all protocols.

EXAMPLE
       A common technique is to use the write callback to store  the  incoming
       data  into  a  dynamically growing allocated buffer, and then this CUR-
       LOPT_WRITEDATA(3) is used to point to a struct or the buffer  to  store
       data      in.      Like      in      the      getinmemory      example:
       https://curl.haxx.se/libcurl/c/getinmemory.html

AVAILABILITY
       Available in all libcurl versions. This option was  formerly  known  as
       CURLOPT_FILE, the name CURLOPT_WRITEDATA(3) was introduced in 7.9.7.

RETURN VALUE
       This will return CURLE_OK.

SEE ALSO
       CURLOPT_WRITEFUNCTION(3), CURLOPT_READDATA(3),

libcurl 7.54.0                 February 03, 2016          CURLOPT_WRITEDATA(3)