89 lines
2.5 KiB
Groff
89 lines
2.5 KiB
Groff
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.\" **************************************************************************
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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_DEBUGDATA 3 "17 Jun 2014" libcurl libcurl
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.SH NAME
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CURLOPT_DEBUGDATA \- pointer passed to the debug callback
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DEBUGDATA, void *pointer);
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.fi
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.SH DESCRIPTION
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Pass a \fIpointer\fP to whatever you want passed in to your
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\fICURLOPT_DEBUGFUNCTION(3)\fP in the last void * argument. This pointer is
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not used by libcurl, it is only passed to the callback.
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.SH DEFAULT
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NULL
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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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struct data {
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void *custom;
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};
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static int my_trace(CURL *handle, curl_infotype type,
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char *data, size_t size,
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void *clientp)
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{
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struct data *mine = clientp;
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printf("our ptr: %p\\n", mine->custom);
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/* output debug info */
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}
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int main(void)
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{
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CURL *curl;
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CURLcode res;
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struct data my_tracedata;
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curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
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curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &my_tracedata);
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/* the DEBUGFUNCTION has no effect until we enable VERBOSE */
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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res = curl_easy_perform(curl);
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/* always cleanup */
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curl_easy_cleanup(curl);
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}
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return 0;
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}
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.fi
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.SH AVAILABILITY
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Always
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.SH RETURN VALUE
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Returns CURLE_OK
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.SH "SEE ALSO"
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.BR CURLOPT_DEBUGFUNCTION (3),
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.BR CURLOPT_STDERR (3)
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