1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: curl_multi_setopt 5Section: 3 6Source: libcurl 7See-also: 8 - curl_multi_cleanup (3) 9 - curl_multi_info_read (3) 10 - curl_multi_init (3) 11 - curl_multi_socket (3) 12Protocol: 13 - All 14--- 15 16# NAME 17 18curl_multi_setopt - set options for a curl multi handle 19 20# SYNOPSIS 21 22~~~c 23#include <curl/curl.h> 24 25CURLMcode curl_multi_setopt(CURLM *multi_handle, CURLMoption option, parameter); 26~~~ 27 28# DESCRIPTION 29 30curl_multi_setopt(3) is used to tell a libcurl multi handle how to 31behave. By using the appropriate options to curl_multi_setopt(3), you 32can change libcurl's behavior when using that multi handle. All options are 33set with the *option* followed by the *parameter*. That parameter can 34be a **long**, a **function pointer**, an **object pointer** or a 35**curl_off_t** type, depending on what the specific option expects. Read 36this manual carefully as bad input values may cause libcurl to behave 37badly. You can only set one option in each function call. 38 39# OPTIONS 40 41## CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE 42 43See CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3) 44 45## CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE 46 47See CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3) 48 49## CURLMOPT_MAX_HOST_CONNECTIONS 50 51See CURLMOPT_MAX_HOST_CONNECTIONS(3) 52 53## CURLMOPT_MAX_PIPELINE_LENGTH 54 55See CURLMOPT_MAX_PIPELINE_LENGTH(3) 56 57## CURLMOPT_MAX_TOTAL_CONNECTIONS 58 59See CURLMOPT_MAX_TOTAL_CONNECTIONS(3) 60 61## CURLMOPT_MAXCONNECTS 62 63See CURLMOPT_MAXCONNECTS(3) 64 65## CURLMOPT_PIPELINING 66 67See CURLMOPT_PIPELINING(3) 68 69## CURLMOPT_PIPELINING_SITE_BL 70 71See CURLMOPT_PIPELINING_SITE_BL(3) 72 73## CURLMOPT_PIPELINING_SERVER_BL 74 75See CURLMOPT_PIPELINING_SERVER_BL(3) 76 77## CURLMOPT_PUSHFUNCTION 78 79See CURLMOPT_PUSHFUNCTION(3) 80 81## CURLMOPT_PUSHDATA 82 83See CURLMOPT_PUSHDATA(3) 84 85## CURLMOPT_SOCKETFUNCTION 86 87See CURLMOPT_SOCKETFUNCTION(3) 88 89## CURLMOPT_SOCKETDATA 90 91See CURLMOPT_SOCKETDATA(3) 92 93## CURLMOPT_TIMERFUNCTION 94 95See CURLMOPT_TIMERFUNCTION(3) 96 97## CURLMOPT_TIMERDATA 98 99See CURLMOPT_TIMERDATA(3) 100 101## CURLMOPT_MAX_CONCURRENT_STREAMS 102 103See CURLMOPT_MAX_CONCURRENT_STREAMS(3) 104 105# EXAMPLE 106 107~~~c 108 109#define MAX_PARALLEL 45 110 111int main(void) 112{ 113 CURLM *multi; 114 /* Limit the amount of simultaneous connections curl should allow: */ 115 curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, (long)MAX_PARALLEL); 116} 117~~~ 118 119# AVAILABILITY 120 121Added in 7.15.4 122 123# RETURN VALUE 124 125The standard CURLMcode for multi interface error codes. Note that it returns a 126CURLM_UNKNOWN_OPTION if you try setting an option that this version of libcurl 127does not know of. 128
