CURLOPT_TELNETOPTIONS(3) Library Functions Manual CURLOPT_TELNETOPTIONS(3)
NAME
CURLOPT_TELNETOPTIONS - set of telnet options
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TELNETOPTIONS,
struct curl_slist *cmds);
DESCRIPTION
Provide a pointer to a curl_slist with variables to pass to the telnet
negotiations. The variables should be in the format <option=value>.
libcurl supports the options TTYPE, XDISPLOC and NEW_ENV. See the TELNET
standard for details.
Using this option multiple times makes the last set list override the
previous ones. Set it to NULL to disable its use again.
libcurl does not copy the list, it needs to be kept around until after
the transfer has completed.
DEFAULT
NULL
PROTOCOLS
This functionality affects telnet only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
struct curl_slist *options;
options = curl_slist_append(NULL, "TTTYPE=vt100");
options = curl_slist_append(options, "USER=foobar");
curl_easy_setopt(curl, CURLOPT_URL, "telnet://example.com/");
curl_easy_setopt(curl, CURLOPT_TELNETOPTIONS, options);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
curl_slist_free_all(options);
}
}
AVAILABILITY
Added in curl 7.7
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_HTTPHEADER(3), CURLOPT_QUOTE(3)
libcurl 2026-07-12 CURLOPT_TELNETOPTIONS(3)
Generated by dwww version 1.16 on Sat Oct 3 05:44:59 CEST 2026.