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

NAME
       CURLINFO_LASTSOCKET - get the last socket used

SYNOPSIS
       #include <curl/curl.h>

       CURLcode   curl_easy_getinfo(CURL  *handle,  CURLINFO_LASTSOCKET,  long
       *socket);

DESCRIPTION
       Deprecated since 7.45.0. Use CURLINFO_ACTIVESOCKET(3) instead.

       Pass a pointer to a long to receive the last socket used by  this  curl
       session.  If  the  socket  is no longer valid, -1 is returned. When you
       finish working with the socket, you must  call  curl_easy_cleanup()  as
       usual  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).

       NOTE: this API is deprecated since it is not working on win64 where the
       SOCKET type is 64 bits large while its  'long'  is  32  bits.  Use  the
       CURLINFO_ACTIVESOCKET(3) instead, if possible.

PROTOCOLS
       All

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.15.2

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_ACTIVESOCKET(3),

libcurl 7.54.0                 February 03, 2016        CURLINFO_LASTSOCKET(3)