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.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, <[email protected]>, et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at https://curl.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" * SPDX-License-Identifier: curl .\" * .\" ************************************************************************** .\" .TH CURLOPT_CHUNK_DATA 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_setopt options" .SH NAME CURLOPT_CHUNK_DATA \- pointer passed to the FTP chunk callbacks .SH SYNOPSIS .nf #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CHUNK_DATA, void *pointer); .fi .SH DESCRIPTION Pass a \fIpointer\fP that will be untouched by libcurl and passed as the ptr argument to the \fICURLOPT_CHUNK_BGN_FUNCTION(3)\fP and \fICURLOPT_CHUNK_END_FUNCTION(3)\fP. .SH DEFAULT NULL .SH PROTOCOLS FTP .SH EXAMPLE .nf static long file_is_coming(struct curl_fileinfo *finfo, struct callback_data *data, int remains) { printf("%3d %40s %10luB ", remains, finfo->filename, (unsigned long)finfo->size); switch(finfo->filetype) { case CURLFILETYPE_DIRECTORY: printf(" DIR\\n"); break; case CURLFILETYPE_FILE: printf("FILE "); break; default: printf("OTHER\\n"); break; } if(finfo->filetype == CURLFILETYPE_FILE) { /* do not transfer files >= 50B */ if(finfo->size > 50) { printf("SKIPPED\\n"); return CURL_CHUNK_BGN_FUNC_SKIP; } data->output = fopen(finfo->filename, "wb"); if(!data->output) { return CURL_CHUNK_BGN_FUNC_FAIL; } } return CURL_CHUNK_BGN_FUNC_OK; } int main() { /* data for callback */ struct callback_data callback_info; /* callback is called before download of concrete file started */ curl_easy_setopt(curl, CURLOPT_CHUNK_BGN_FUNCTION, file_is_coming); curl_easy_setopt(curl, CURLOPT_CHUNK_DATA, &callback_info); } .fi .SH AVAILABILITY Added in 7.21.0 .SH RETURN VALUE Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. .SH "SEE ALSO" .BR CURLOPT_CHUNK_BGN_FUNCTION "(3), " CURLOPT_WILDCARDMATCH "(3), "