개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

curl_easy_recv(3)

curl_easy_recv(3)               libcurl Manual               curl_easy_recv(3)

NAME
       curl_easy_recv - receives raw data on an "easy" connection

SYNOPSIS
       #include <curl/easy.h>

       CURLcode curl_easy_recv(CURL *curl, void *buffer, size_t buflen, size_t *n);

DESCRIPTION
       This  function  receives  raw data from the established connection. You
       may use it together with curl_easy_send(3) to implement  custom  proto‐
       cols  using  libcurl.  This functionality can be particularly useful if
       you use proxies and/or SSL encryption: libcurl will take care of  proxy
       negotiation and connection setup.

       buffer is a pointer to your buffer that will get the received data. bu‐
       flen  is  the  maximum  amount  of data you can get in that buffer. The
       variable n points to will receive the number of received bytes.

       To establish the connection, set CURLOPT_CONNECT_ONLY(3) option  before
       calling   curl_easy_perform(3)   or  curl_multi_perform(3).  Note  that
       curl_easy_recv(3) does not work on connections that were created  with‐
       out this option.

       The  call  will  return  CURLE_AGAIN  if there is no data to read - the
       socket is used in non-blocking mode internally. When CURLE_AGAIN is re‐
       turned, use your operating system facilities like select(2) to wait for
       data. The  socket  may  be  obtained  using  curl_easy_getinfo(3)  with
       CURLINFO_ACTIVESOCKET(3).

       Wait  on the socket only if curl_easy_recv(3) returns CURLE_AGAIN.  The
       reason for this is libcurl or the SSL library may internally cache some
       data, therefore you should call curl_easy_recv(3)  until  all  data  is
       read which would include any cached data.

       Furthermore if you wait on the socket and it tells you there is data to
       read,  curl_easy_recv(3)  may  return CURLE_AGAIN if the only data that
       was read was for internal SSL processing, and no other data  is  avail‐
       able.

EXAMPLE
        curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
        /* Do not do the transfer - only connect to host */
        curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
        res = curl_easy_perform(curl);

        if(res == CURLE_OK) {
          /* Extract the socket from the curl handle -
             we will need it for waiting. */
          res = curl_easy_getinfo(curl, CURLINFO_ACTIVESOCKET, &sockfd);

          /* read data */
          res = curl_easy_recv(curl, buf, sizeof(buf), &nread);
        }

AVAILABILITY
       Added in 7.18.2.

RETURN VALUE
       On success, returns CURLE_OK, stores the received data into buffer, and
       the number of bytes it actually read into *n.

       On failure, returns the appropriate error code.

       The  function  may return CURLE_AGAIN. In this case, use your operating
       system facilities to wait until data can be read, and retry.

       Reading exactly 0 bytes indicates a closed connection.

       If there's no socket available to use from the previous transfer,  this
       function returns CURLE_UNSUPPORTED_PROTOCOL.

SEE ALSO
       curl_easy_setopt(3),     curl_easy_perform(3),    curl_easy_getinfo(3),
       curl_easy_send(3)

libcurl 7.86.0                   May 17, 2022                curl_easy_recv(3)