plucky (3) CURLOPT_WRITEDATA.3.gz

NAME

       CURLOPT_WRITEDATA - 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 get in that callback's fourth and last argument. If you do not use a write callback, you must
       make pointer a 'FILE ' (cast to 'void ') as libcurl passes this to fwrite(3) when writing data.

       The  internal CURLOPT_WRITEFUNCTION(3) writes the data to the FILE * given with this option, or to stdout
       if this option has not been set.

       If you are using libcurl as a Windows DLL, you MUST use a CURLOPT_WRITEFUNCTION(3) if you set this option
       or you might experience crashes.

DEFAULT

       stdout

PROTOCOLS

       This functionality affects all supported 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 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

HISTORY

       This option was formerly known as CURLOPT_FILE, the name CURLOPT_WRITEDATA(3) was added in 7.9.7.

AVAILABILITY

       Added in curl 7.9.7

RETURN VALUE

       This returns CURLE_OK.

SEE ALSO

       CURLOPT_HEADERDATA(3), CURLOPT_READDATA(3), CURLOPT_WRITEFUNCTION(3)