External/Libraries/CURL/share/man/man3/CURLOPT_STDERR.3

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.TH CURLOPT_STDERR 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_setopt options"

.SH NAME
CURLOPT_STDERR \- redirect stderr to another stream
.SH SYNOPSIS
.nf
#include <curl/curl.h>

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 win32 DLL, this option will cause an exception
and 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
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), " CURLOPT_NOPROGRESS "(3), "
.BR CURLOPT_DEBUGFUNCTION "(3) "