curl_multi_socket_all(3) Library Functions Manual curl_multi_socket_all(3)
NAME
curl_multi_socket_all - reads/writes available data for all easy
handles
SYNOPSIS
#include <curl/curl.h>
CURLMcode curl_multi_socket_all(CURLM *multi_handle,
int *running_handles);
DESCRIPTION
This function is deprecated for performance reasons but there are no
plans to remove it from the API. Use curl_multi_socket_action(3)
instead.
At return, the integer running_handles points to contains the number of
still running easy handles within the multi handle. When this number
reaches zero, all transfers are complete/done.
Force libcurl to (re-)check all its internal sockets and transfers
instead of a single one by calling curl_multi_socket_all(3). Note that
there should not be any reason to use this function.
PROTOCOLS
This functionality affects all supported protocols
EXAMPLE
int main(void)
{
int running;
int rc;
CURLM *multi = curl_multi_init();
rc = curl_multi_socket_all(multi, &running);
}
AVAILABILITY
Added in curl 7.15.4
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).
The return code is for the whole multi stack. Problems still might have
occurred on individual transfers even when one of these functions
return OK.
SEE ALSO
curl_multi_cleanup(3), curl_multi_fdset(3), curl_multi_info_read(3),
curl_multi_init(3), thehiperfifo.cexample
libcurl 2026-03-23 curl_multi_socket_all(3)
curl 8.19.0 - Generated Tue Mar 24 15:28:55 CDT 2026