curl_easy_option_by_id(3) Introduction to Library Functions

NAME

curl_easy_option_by_id - find an easy setopt option by id

SYNOPSIS

#include <curl/curl.h>

const struct curl_easyoption *curl_easy_option_by_id(CURLoption id);

DESCRIPTION

Given a CURLoption id, this function returns a pointer to the
curl_easyoption struct, holding information about the
curl_easy_setopt(3) option using that id. The option id is the
CURLOPT_ prefixed ones provided in the standard curl/curl.h header
file. This function returns the non-alias version of the cases where
there is an alias function as well.

If libcurl has no option with the given id, this function returns
NULL.

PROTOCOLS

This functionality affects all supported protocols

EXAMPLE

int main(void)
{
const struct curl_easyoption *opt = curl_easy_option_by_id(CURLOPT_URL);
if(opt) {
printf("This option wants type %x\n", opt->type);
}
}

AVAILABILITY

Added in curl 7.73.0

RETURN VALUE

A pointer to the curl_easyoption struct for the option or NULL.

SEE ALSO

curl_easy_option_by_name(3), curl_easy_option_next(3),
curl_easy_setopt(3)

libcurl 2026-01-08 curl_easy_option_by_id(3)