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CURLOPT_KRBLEVEL(3) Library Functions Manual CURLOPT_KRBLEVEL(3)

NAME

CURLOPT_KRBLEVEL - FTP kerberos security level

SYNOPSIS

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KRBLEVEL, char *level);

DESCRIPTION

Deprecated. It serves no purpose anymore.

Pass a char pointer as parameter. Set the kerberos security level for FTP; this also enables kerberos awareness. This is a string that should match one of the following: clear, safe, confidential or private. If the string is set but does not match one of these, private is used. Set the string to NULL to disable kerberos support for FTP.

The application does not have to keep the string around after setting this option.

The application does not have to keep the string around after setting this option.

DEFAULT

NULL

PROTOCOLS

This functionality affects ftp only

EXAMPLE

int main(void)
{

CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/foo.bin");
curl_easy_setopt(curl, CURLOPT_KRBLEVEL, "private");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
} }

HISTORY

Functionality removed in 8.17.0

This option was known as CURLOPT_KRB4LEVEL up to 7.16.3

DEPRECATED

Deprecated since 8.17.0

AVAILABILITY

Added in curl 7.16.4

RETURN VALUE

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

CURLOPT_USE_SSL(3)

2025-10-11 libcurl