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curl_multi_setopt.3
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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.TH curl_multi_setopt 3 "4 Nov 2014" "libcurl 7.39.0" "libcurl Manual"
.SH NAME
curl_multi_setopt \- set options for a curl multi handle
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *multi_handle, CURLMoption option, param);
.fi
.SH DESCRIPTION
\fIcurl_multi_setopt(3)\fP is used to tell a libcurl multi handle how to
behave. By using the appropriate options to \fIcurl_multi_setopt(3)\fP, you
can change libcurl's behavior when using that multi handle. All options are
set with the \fIoption\fP followed by the parameter \fIparam\fP. That
parameter can be a \fBlong\fP, a \fBfunction pointer\fP, an \fBobject
pointer\fP or a \fBcurl_off_t\fP 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.
.SH OPTIONS
.IP CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE
See \fICURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3)\fP
.IP CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE
See \fICURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3)\fP
.IP CURLMOPT_MAX_HOST_CONNECTIONS
See \fICURLMOPT_MAX_HOST_CONNECTIONS(3)\fP
.IP CURLMOPT_MAX_PIPELINE_LENGTH
See \fICURLMOPT_MAX_PIPELINE_LENGTH(3)\fP
.IP CURLMOPT_MAX_TOTAL_CONNECTIONS
See \fICURLMOPT_MAX_TOTAL_CONNECTIONS(3)\fP
.IP CURLMOPT_MAXCONNECTS
See \fICURLMOPT_MAXCONNECTS(3)\fP
.IP CURLMOPT_PIPELINING
See \fICURLMOPT_PIPELINING(3)\fP
.IP CURLMOPT_PIPELINING_SITE_BL
See \fICURLMOPT_PIPELINING_SITE_BL(3)\fP
.IP CURLMOPT_PIPELINING_SERVER_BL
See \fICURLMOPT_PIPELINING_SERVER_BL(3)\fP
.IP CURLMOPT_PUSHFUNCTION
See \fICURLMOPT_PUSHFUNCTION(3)\fP
.IP CURLMOPT_PUSHDATA
See \fICURLMOPT_PUSHDATA(3)\fP
.IP CURLMOPT_SOCKETFUNCTION
See \fICURLMOPT_SOCKETFUNCTION(3)\fP
.IP CURLMOPT_SOCKETDATA
See \fICURLMOPT_SOCKETDATA(3)\fP
.IP CURLMOPT_TIMERFUNCTION
See \fICURLMOPT_TIMERFUNCTION(3)\fP
.IP CURLMOPT_TIMERDATA
See \fICURLMOPT_TIMERDATA(3)\fP
.IP CURLMOPT_MAX_CONCURRENT_STREAMS
See \fICURLMOPT_MAX_CONCURRENT_STREAMS(3)\fP
.SH EXAMPLE
.fi
/* Limit the amount of simultaneous connections curl should allow: */
curl_multi_setopt(handle, CURLMOPT_MAXCONNECTS, (long)MAX_PARALLEL);
.nf
.SH AVAILABILITY
Added in 7.15.4
.SH 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.
.SH "SEE ALSO"
.BR curl_multi_cleanup "(3), " curl_multi_init "(3), "
.BR curl_multi_socket "(3), " curl_multi_info_read "(3)"