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<title>curl_multi_setopt man page</title>
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<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
<p class="level0">curl_multi_setopt - set options for a curl multi handle <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
<p class="level0">#include <curl/curl.h>
<p class="level0">CURLMcode curl_multi_setopt(CURLM * multi_handle, CURLMoption option, param); <a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
<p class="level0">curl_multi_setopt() is used to tell a libcurl multi handle how to behave. By using the appropriate options to <span Class="emphasis">curl_multi_setopt</span>, you can change libcurl's behaviour when using that multi handle. All options are set with the <span Class="emphasis">option</span> followed by the parameter <span Class="emphasis">param</span>. That parameter can be a <span Class="bold">long</span>, a <span Class="bold">function pointer</span>, an <span Class="bold">object pointer</span> or a <span Class="bold">curl_off_t</span> 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.
<p class="level0"><a name="OPTIONS"></a><h2 class="nroffsh">OPTIONS</h2>
<p class="level0">
<p class="level0"><a name="CURLMOPTSOCKETFUNCTION"></a><span class="nroffip">CURLMOPT_SOCKETFUNCTION</span>
<p class="level1">Pass a pointer to a function matching the curl_socket_callback prototype. The <a class="emphasis" href="./curl_multi_socket.html">curl_multi_socket(3)</a> functions inform the application about updates in the socket (file descriptor) status by doing none, one or multiple calls to the curl_socket_callback given in the <span Class="bold">param</span> argument. They update the status with changes since the previous time a <a class="emphasis" href="./curl_multi_socket.html">curl_multi_socket(3)</a> function was called. If the given callback pointer is NULL, no callback will be called. Set the callback's <span Class="bold">userp</span> argument with <a class="emphasis" href="#CURLMOPTSOCKETDATA">CURLMOPT_SOCKETDATA</a>. See <a class="emphasis" href="./curl_multi_socket.html">curl_multi_socket(3)</a> for more callback details.
<p class="level0"><a name="CURLMOPTSOCKETDATA"></a><span class="nroffip">CURLMOPT_SOCKETDATA</span>
<p class="level1">Pass a pointer to whatever you want passed to the curl_socket_callback's forth argument, the userp pointer. This is not used by libcurl but only passed-thru as-is. Set the callback pointer with <a class="emphasis" href="#CURLMOPTSOCKETFUNCTION">CURLMOPT_SOCKETFUNCTION</a>. <a name="RETURNS"></a><h2 class="nroffsh">RETURNS</h2>
<p class="level0">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 doesn't know of. <a name="AVAILABILITY"></a><h2 class="nroffsh">AVAILABILITY</h2>
<p class="level0">This function was added in libcurl 7.15.4. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
<p class="level0"><a class="manpage" href="./curl_multi_cleanup.html">curl_multi_cleanup (3)</a> <a class="manpage" href="./curl_multi_init.html"> curl_multi_init (3)</a> <span Class="manpage"> </span> <a class="manpage" href="./curl_multi_socket.html">curl_multi_socket (3)</a> <a class="manpage" href="./curl_multi_info_read.html"> curl_multi_info_read (3)</a> <p class="roffit">
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