.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) Daniel Stenberg, , 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_STDERR 3 "17 Jun 2014" libcurl libcurl .SH NAME CURLOPT_STDERR \- redirect stderr to another stream .SH SYNOPSIS .nf #include CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STDERR, FILE *stream); .fi .SH DESCRIPTION Pass a FILE * as parameter. Tell libcurl to use this \fIstream\fP instead of stderr when showing the progress meter and displaying \fICURLOPT_VERBOSE(3)\fP data. If you are using libcurl as a Windows DLL, this option causes an exception and a crash in the library since it cannot access a FILE * passed on from the application. A work-around is to instead use \fICURLOPT_DEBUGFUNCTION(3)\fP. .SH DEFAULT stderr .SH PROTOCOLS All .SH EXAMPLE .nf int main(void) { CURL *curl = curl_easy_init(); FILE *filep = fopen("dump", "wb"); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); curl_easy_setopt(curl, CURLOPT_STDERR, filep); curl_easy_perform(curl); } } .fi .SH AVAILABILITY Always .SH RETURN VALUE Returns CURLE_OK .SH "SEE ALSO" .BR CURLOPT_VERBOSE (3), .BR CURLOPT_NOPROGRESS (3), .BR CURLOPT_DEBUGFUNCTION (3)