1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLOPT_STDERR 5Section: 3 6Source: libcurl 7See-also: 8 - CURLOPT_DEBUGFUNCTION (3) 9 - CURLOPT_NOPROGRESS (3) 10 - CURLOPT_VERBOSE (3) 11Protocol: 12 - All 13--- 14 15# NAME 16 17CURLOPT_STDERR - redirect stderr to another stream 18 19# SYNOPSIS 20 21~~~c 22#include <curl/curl.h> 23 24CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STDERR, FILE *stream); 25~~~ 26 27# DESCRIPTION 28 29Pass a FILE * as parameter. Tell libcurl to use this *stream* instead of 30stderr when showing the progress meter and displaying CURLOPT_VERBOSE(3) 31data. 32 33If you are using libcurl as a Windows DLL, this option causes an exception and 34a crash in the library since it cannot access a FILE * passed on from the 35application. A work-around is to instead use CURLOPT_DEBUGFUNCTION(3). 36 37# DEFAULT 38 39stderr 40 41# EXAMPLE 42 43~~~c 44int main(void) 45{ 46 CURL *curl = curl_easy_init(); 47 FILE *filep = fopen("dump", "wb"); 48 if(curl) { 49 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 50 curl_easy_setopt(curl, CURLOPT_STDERR, filep); 51 52 curl_easy_perform(curl); 53 } 54} 55~~~ 56 57# AVAILABILITY 58 59Always 60 61# RETURN VALUE 62 63Returns CURLE_OK 64
