How can I add a new search engine to Safari without any 3rd party add-ons?

Question

I know add-ons such as Glims can do this, but I would rather stay away from them. Any native (or more likely semi-native) way to do so? If it matters, the engine I would like to add is duckduckgo.

Answer 1

MacHints just did a post on this. The basic premise is that you redirect Yahoo! Search via the hosts file to the search engine of your choice. It works like a charm.

Answer 2

No, the only options are Google, Bing, and Yahoo.

If it is of any help, DuckDuckGo have their own extension on the Apple website for Safari extensions.

Answer 3

The Safari Extension anysearch allows you to change the search engine used by the Safari search bar/unibar, without any hack-ish stuff such as changing the hosts file.