Provided by: libcurl4-doc_7.88.1-8ubuntu1_all bug


       curl_multi_timeout - how long to wait for action before proceeding


       #include <curl/curl.h>

       CURLMcode curl_multi_timeout(CURLM *multi_handle, long *timeout);


       An  application  using  the  libcurl  multi interface should call curl_multi_timeout(3) to
       figure out how long it should wait for socket actions - at most - before proceeding.

       Proceeding   means   either   doing   the   socket-style   timeout   action:   call    the
       curl_multi_socket_action(3)  function with the sockfd argument set to CURL_SOCKET_TIMEOUT,
       or call curl_multi_perform(3) if you are using  the  simpler  and  older  multi  interface

       The  timeout value returned in the long timeout points to, is in number of milliseconds at
       this moment. If 0, it means you should proceed immediately without waiting  for  anything.
       If it returns -1, there's no timeout at all set.

       An  application  that  uses  the multi_socket API SHOULD NOT use this function, but SHOULD
       instead use the CURLMOPT_TIMERFUNCTION(3) option for proper and desired behavior.

       Note: if libcurl returns a -1 timeout here, it just means that libcurl  currently  has  no
       stored  timeout value. You must not wait too long (more than a few seconds perhaps) before
       you call curl_multi_perform() again.


       struct timeval timeout;
       long timeo;

       curl_multi_timeout(multi_handle, &timeo);
       if(timeo < 0)
         /* no set timeout, use a default */
         timeo = 980;

       timeout.tv_sec = timeo / 1000;
       timeout.tv_usec = (timeo % 1000) * 1000;

       /* wait for activities no longer than the set timeout */
       select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);


       Call curl_multi_timeout(3), then wait for action on the sockets. Figure out which  sockets
       to wait for by calling curl_multi_fdset(3).

       When  there  is  activity or timeout, call curl_multi_perform(3) and then loop - until all
       transfers are complete.


       This function was added in libcurl 7.15.4.


       The standard CURLMcode for multi interface error codes.


       curl_multi_fdset(3), curl_multi_info_read(3), curl_multi_socket(3), curl_multi_setopt(3)