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)