<title>curl_multi_fdset man page</title>
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<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
<p class="level0">curl_multi_fdset - extracts file descriptor information from a multi handle <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
-<p class="level0"><pre>
-<p class="level0">#include <curl/curl.h>
- <p class="level0">CURLMcode curl_multi_fdset(CURLM *multi_handle,
- fd_set *read_fd_set,
- fd_set *write_fd_set,
- fd_set *exc_fd_set,
- int *max_fd);
- <p class="level0"></pre>
+<p class="level0"><pre class="level0">
+#include <curl/curl.h>
+
+CURLMcode curl_multi_fdset(CURLM *multi_handle,
+ fd_set *read_fd_set,
+ fd_set *write_fd_set,
+ fd_set *exc_fd_set,
+ int *max_fd);
+</pre>
<a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
<p class="level0">This function extracts file descriptor information from a given multi_handle. libcurl returns its fd_set sets. The application can use these to select() on, but be sure to FD_ZERO them before calling this function as <a Class="emphasis" href="./curl_multi_fdset.html">curl_multi_fdset</a> only adds its own descriptors, it doesn't zero or otherwise remove any others. The <a Class="emphasis" href="./curl_multi_perform.html">curl_multi_perform</a> function should be called as soon as one of them is ready to be read from or written to.
<p class="level0">If the <span Class="emphasis">read_fd_set</span> argument is not a null pointer, it points to an object of type fd_set that on returns specifies the file descriptors to be checked for being ready to read.