curl-w32/docs/libcurl/opts/CURLOPT_STDERR.md

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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_STDERR
Section: 3
Source: libcurl
See-also:
- CURLOPT_DEBUGFUNCTION (3)
- CURLOPT_NOPROGRESS (3)
- CURLOPT_VERBOSE (3)
---
# NAME
CURLOPT_STDERR - redirect stderr to another stream
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STDERR, FILE *stream);
~~~
# DESCRIPTION
Pass a FILE * as parameter. Tell libcurl to use this *stream* instead of
stderr when showing the progress meter and displaying CURLOPT_VERBOSE(3)
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 CURLOPT_DEBUGFUNCTION(3).
# DEFAULT
stderr
# PROTOCOLS
All
# EXAMPLE
~~~c
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);
}
}
~~~
# AVAILABILITY
Always
# RETURN VALUE
Returns CURLE_OK