mojave man page for curlopt_writedata

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 CURLOPT_WRITEFUNCTION(3) option, this is the pointer you'll get in that call-
       back'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_WRITEFUNCTION(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)