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
       _WRITEFUNCTION&section=3">CURLOPT_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 _WRITEFUNCTION&section=3">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 a
       _WRITEFUNCTION&section=3">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
       _WRITEDATA&section=3">CURLOPT_WRITEDATA(3) is used to point to a struct or the buffer to
       store data in. Like in the getinmemory example:
       https://curl.se/libcurl/c/getinmemory.html

AVAILABILITY
       Available in all libcurl versions. This option was formerly known as
       CURLOPT_FILE, the name _WRITEDATA&section=3">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 7.77.0                 November 4, 2020           CURLOPT_WRITEDATA(3)