curl_multi_setopt(3)       Library Functions Manual       curl_multi_setopt(3)

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)

       This functionality affects all supported protocols

       #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);
       }

       Added in curl 7.15.4

       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.

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

libcurl                           2024-08-05              curl_multi_setopt(3)