Unknown option: "-3" Unix manual page for CURLINFO_ACTIVESOCKET. (host=minya system=Darwin)
CURLINFO_ACTIVESOCKET(3)   curl_easy_getinfo options  CURLINFO_ACTIVESOCKET(3)

NAME
       CURLINFO_ACTIVESOCKET - get the active socket

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_ACTIVESOCKET,
                                  curl_socket_t *socket);

DESCRIPTION
       Pass  a pointer to a curl_socket_t to receive the active socket used by
       this curl session. If the socket is no longer valid, CURL_SOCKET_BAD is
       returned.  When  you  finish  working  with  the  socket, you must call
       curl_easy_cleanup(3) as usual on the easy handle and let libcurl  close
       the socket and cleanup other resources associated with the handle. This
       is typically used in combination with CURLOPT_CONNECT_ONLY(3).

       This option was added as a replacement for CURLINFO_LASTSOCKET(3) since
       that one isn't working on all platforms.

PROTOCOLS
       All

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.45.0

RETURN VALUE
       Returns  CURLE_OK  if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_LASTSOCKET(3),

libcurl 7.54.0                 February 03, 2016      CURLINFO_ACTIVESOCKET(3)