Provided by: libcurl4-doc_7.58.0-2ubuntu3_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're  using  the  simpler  and  older  multi  interface

       The  timeout value returned in the long timeout points to, is in number of milliseconds at
       this very 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 curl_multi_setopt(3) and its  CURLMOPT_TIMERFUNCTION  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);


       The standard CURLMcode for multi interface error codes.


       Call  curl_multi_timeout(3),  then  wait  for  action on the sockets. You figure out which
       sockets  to  wait  for  by  calling  curl_multi_fdset(3)  or  by  a   previous   call   to


       This function was added in libcurl 7.15.4.


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