NAME

       curl_multi_setopt - set options for a curl multi handle

SYNOPSIS

       #include <curl/curl.h>

       CURLMcode curl_multi_setopt(CURLM *multi, CURLMoption option, parameter);

DESCRIPTION

       curl_multi_setopt(3)  is  used  to tell a libcurl multi handle how to behave. By using the
       appropriate options to curl_multi_setopt(3), you can change libcurl's behavior when  using
       that  multi  handle.  All  options are set with the option followed by the parameter. That
       parameter can be a long, a function pointer, an  object  pointer  or  a  curl_off_t  type,
       depending  on  what  the  specific option expects. Read this manual carefully as bad input
       values may cause libcurl to behave badly. You can only set one  option  in  each  function
       call.

OPTIONS

       CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE
              deprecated See CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3)

       CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE
              deprecated See CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3)

       CURLMOPT_MAXCONNECTS
              Size of connection cache. See CURLMOPT_MAXCONNECTS(3)

       CURLMOPT_MAX_CONCURRENT_STREAMS
              Max concurrent streams for http2. See CURLMOPT_MAX_CONCURRENT_STREAMS(3)

       CURLMOPT_MAX_HOST_CONNECTIONS
              Max number of connections to a single host. See CURLMOPT_MAX_HOST_CONNECTIONS(3)

       CURLMOPT_MAX_PIPELINE_LENGTH
              deprecated. See CURLMOPT_MAX_PIPELINE_LENGTH(3)

       CURLMOPT_MAX_TOTAL_CONNECTIONS
              Max simultaneously open connections. See CURLMOPT_MAX_TOTAL_CONNECTIONS(3)

       CURLMOPT_PIPELINING
              Enable HTTP multiplexing. See CURLMOPT_PIPELINING(3)

       CURLMOPT_PIPELINING_SERVER_BL
              deprecated. See CURLMOPT_PIPELINING_SERVER_BL(3)

       CURLMOPT_PIPELINING_SITE_BL
              deprecated. See CURLMOPT_PIPELINING_SITE_BL(3)

       CURLMOPT_PUSHDATA
              Pointer to pass to push callback. See CURLMOPT_PUSHDATA(3)

       CURLMOPT_PUSHFUNCTION
              Callback that approves or denies server pushes. See CURLMOPT_PUSHFUNCTION(3)

       CURLMOPT_SOCKETDATA
              Custom pointer passed to the socket callback. See CURLMOPT_SOCKETDATA(3)

       CURLMOPT_SOCKETFUNCTION
              Callback informed about what to wait for. See CURLMOPT_SOCKETFUNCTION(3)

       CURLMOPT_TIMERDATA
              Custom pointer to pass to timer callback. See CURLMOPT_TIMERDATA(3)

       CURLMOPT_TIMERFUNCTION
              Callback to receive timeout values. See CURLMOPT_TIMERFUNCTION(3)

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       #define MAX_PARALLEL 45

       int main(void)
       {
         CURLM *multi;
         /* Limit the amount of simultaneous connections curl should allow: */
         curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, (long)MAX_PARALLEL);
       }

AVAILABILITY

       Added in curl 7.15.4

RETURN VALUE

       The  standard  CURLMcode  for  multi  interface  error  codes.  Note  that  it  returns  a
       CURLM_UNKNOWN_OPTION if you try setting an option that this version of  libcurl  does  not
       know of.

SEE ALSO

       curl_multi_cleanup(3), curl_multi_info_read(3), curl_multi_init(3), curl_multi_socket(3)