CURLOPT_IOCTLDATA (3) Linux Manual Page
CURLOPT_IOCTLDATA – custom pointer passed to I/O callback
Synopsis
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IOCTLDATA, void *pointer);
Description
Pass the pointer that will be untouched by libcurl and passed as the 3rd argument in the ioctl callback set with CURLOPT_IOCTLFUNCTION(3).
Default
By default, the value of this parameter is NULL.
Protocols
Used with HTTP
Example
TODO
Availability
Added in 7.12.3
Return Value
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.