73 lines
2.6 KiB
Groff
73 lines
2.6 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_CLOSESOCKETFUNCTION 3 "16 Jun 2014" libcurl libcurl
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.SH NAME
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CURLOPT_CLOSESOCKETFUNCTION \- callback to socket close replacement
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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int closesocket_callback(void *clientp, curl_socket_t item);
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CLOSESOCKETFUNCTION,
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closesocket_callback);
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.fi
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.SH DESCRIPTION
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Pass a pointer to your callback function, which should match the prototype
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shown above.
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This callback function gets called by libcurl instead of the \fIclose(3)\fP or
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\fIclosesocket(3)\fP call when sockets are closed (not for any other file
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descriptors). This is pretty much the reverse to the
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\fICURLOPT_OPENSOCKETFUNCTION(3)\fP option. Return 0 to signal success and 1
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if there was an error.
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The \fIclientp\fP pointer is set with
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\fICURLOPT_CLOSESOCKETDATA(3)\fP. \fIitem\fP is the socket libcurl wants to be
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closed.
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.SH DEFAULT
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By default libcurl uses the standard socket close function.
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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.nf
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static int closesocket(void *clientp, curl_socket_t item)
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{
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printf("libcurl wants to close %d now\\n", (int)item);
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return 0;
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}
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/* call this function to close sockets */
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curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
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curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &sockfd);
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.fi
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.SH AVAILABILITY
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Added in 7.21.7
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH "SEE ALSO"
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.BR CURLOPT_CLOSESOCKETDATA (3),
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.BR CURLOPT_OPENSOCKETFUNCTION (3)
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