From: Robert Klemme <shortcutter@...>
Date: 2012-06-27T18:18:47+09:00
Subject: Re: how about adding method hook

On Wed, Jun 27, 2012 at 10:12 AM, salamond <jarodzz@gmail.com> wrote:
> Hi, guys.
>
> I want An agent on machine, so that it can fake user actions.
>
> class Agent
>   def initialize(user, dir)
>     @user = user
>     @dir = dir
>   end
>   def mkdir(dir)
>     bak = Process.euid
>     `mkdir`
>     Process.euid = bak
>   end
>   def create_file(file, content)
>     bak = Process.euid
>     `echo #{content} > #{file}`
>     Process.euid = bak
>   end
> end
>
> My problem is, I have a very long list of actions, like mv, touch, mkdir,
> rm, etc.
> I don't want to add save and restore euid for all methods.

Btw, your code is not safe as it does not restore on exception.

> Any one been here before?

Could be that AspectR is for you.  I also once created code to insert
methods before and after a method invocation but I can't seem to find
it in the archives.

A simple solution could look like this
https://gist.github.com/3002732

Kind regards

robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/