CURLOPT_CLOSESOCKETFUNCTION - callback to socket close replacement
#include <curl/curl.h> int closesocket_callback(void *clientp, curl_socket_t item); CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CLOSESOCKETFUNCTION, closesocket_callback);
curl_easy_setopt options CURLOPT_CLOSESOCKETFUNCTION(3) NAME CURLOPT_CLOSESOCKETFUNCTION - callback to socket close replacement SYNOPSIS #include <curl/curl.h> int closesocket_callback(void *clientp, curl_socket_t item); CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CLOSESOCKETFUNCTION, closesocket_callback); DESCRIPTION Pass a pointer to your callback function, which should match the proto- type shown above. This callback function gets called by libcurl instead of the close(3) or closesocket(3) call when sockets are closed (not for any other file descriptors). This is pretty much the reverse to the CURLOPT_OPENSOCK- ETFUNCTION(3) option. Return 0 to signal success and 1 if there was an error. The clientp pointer is set with CURLOPT_CLOSESOCKETDATA(3). item is the socket libcurl wants to be closed. DEFAULT By default libcurl uses the standard socket close function. PROTOCOLS All EXAMPLE static int closesocket(void *clientp, curl_socket_t item) { printf("libcurl wants to close %d now\n", (int)item); return 0; } /* call this function to close sockets */ curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket); curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &sockfd); AVAILABILITY Added in 7.21.7 RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | web/curl | +---------------+------------------+ |Stability | Uncommitted | +---------------+------------------+ SEE ALSO CURLOPT_CLOSESOCKETDATA(3), CURLOPT_OPENSOCKETFUNCTION(3), NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://curl.se/down- load/curl-7.83.1.tar.bz2. Further information about this software can be found on the open source community website at http://curl.haxx.se/. libcurl 7.83.1 November 26, 2021 CURLOPT_CLOSESOCKETFUNCTION(3)