curl_multi_cleanup(3) Library Functions Manual curl_multi_cleanup(3)
NAME
curl_multi_cleanup - close down a multi session
SYNOPSIS
#include <curl/curl.h>
CURLMcode curl_multi_cleanup(CURLM *multi_handle);
DESCRIPTION
This function is the opposite of curl_multi_init(3). Cleans up and re-
moves 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 curl_easy_cleanup(3) way. The order of cleaning up should be:
1 - curl_multi_remove_handle(3) before any easy handles are cleaned up
2 - curl_easy_cleanup(3) can now be called independently since the easy
handle is no longer connected to the multi handle
3 - curl_multi_cleanup(3) should be called when all easy handles are re-
moved
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
CURLMOPT_SOCKETFUNCTION(3) callback.
Passing in a NULL pointer in multi_handle makes this function return
CURLM_BAD_HANDLE immediately with no other action.
Any use of the multi_handle after this function has been called and have
returned, is illegal.
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
CURLM *multi = curl_multi_init();
/* when the multi transfer is done ... */
/* remove all easy handles, then: */
curl_multi_cleanup(multi);
}
AVAILABILITY
Added in curl 7.9.6
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 libcurl-errors(3).
SEE ALSO
curl_easy_cleanup(3), curl_easy_init(3), curl_multi_get_handles(3),
curl_multi_init(3)
libcurl 2026-07-12 curl_multi_cleanup(3)
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