Programmatically add user forum permissions in Drupal

I'd like to programmatically add user forum permissions in Drupal.

Do I have to use ACL module? Is there any 开发者_如何转开发example out there, as the documentation is a bit thin?

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The Rules module will work as well. With the rules module (but not with ACL) you have the option of setting triggers for this to occur.

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What do you mean by programmatically, exactly?

You can define new permissions using hook_perm:

http://api.drupal.org/api/function/hook_perm

But the forum module(s) for Drupal should ship with role based permissions to use.