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Viewing File: curl_multi_cleanup.3

.\" generated by cd2nroff 0.1 from curl_multi_cleanup.md
.TH curl_multi_cleanup 3 "2025-06-27" libcurl
.SH NAME
curl_multi_cleanup \- close down a multi session
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLMcode curl_multi_cleanup(CURLM *multi_handle);
.fi
.SH DESCRIPTION
This function is the opposite of \fIcurl_multi_init(3)\fP. Cleans up and removes a
whole multi stack. It does not free or touch any individual easy handles in
any way \- they still need to be closed individually, using the usual
\fIcurl_easy_cleanup(3)\fP way. The order of cleaning up should be:

1 \- \fIcurl_multi_remove_handle(3)\fP before any easy handles are cleaned up

2 \- \fIcurl_easy_cleanup(3)\fP can now be called independently since the easy
handle is no longer connected to the multi handle

3 \- \fIcurl_multi_cleanup(3)\fP should be called when all easy handles are
removed

When this function is called, remaining entries in the connection pool held by
the multi handle are shut down, which might trigger calls to the
\fICURLMOPT_SOCKETFUNCTION(3)\fP callback.

Passing in a NULL pointer in \fImulti_handle\fP makes this function return
CURLM_BAD_HANDLE immediately with no other action.

Any use of the \fBmulti_handle\fP after this function has been called and have
returned, is illegal.
.SH PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
int main(void)
{
  CURLM *multi = curl_multi_init();

  /* when the multi transfer is done ... */

  /* remove all easy handles, then: */
  curl_multi_cleanup(multi);
}
.fi
.SH AVAILABILITY
Added in curl 7.9.6
.SH RETURN VALUE
This function returns a CURLMcode indicating success or error.

CURLM_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR curl_easy_cleanup (3),
.BR curl_easy_init (3),
.BR curl_multi_get_handles (3),
.BR curl_multi_init (3)
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