Check User Role Matches To A Specific Role

Check user role matches to a given condition(role) and if not redirect to homepage

<?php
global $current_user; // Use global
get_currentuserinfo(); // Make sure global is set, if not set it.

if(!user_can( $current_user, “seller” )) {
$redirect_to = home_url();
wp_redirect( $redirect_to );
exit;
}
?>