From: Joel VanderWerf <vjoel@...>
Date: 2005-02-25T08:27:04+09:00
Subject: Re: How to extend $stdout#write for system calls?

Joel VanderWerf wrote:
> class IO
>   def tee
>     IO.popen("-") do |pipe| # Won't work on mswin.
>       if pipe # parent
>         while (str = pipe.gets)
>           puts str
>           $stdout.puts str
>         end
>       else # child
>         yield
>       end
>     end
>   end
> end
> 
> f=File.open("/tmp/tee-example-output", "w+")

f.tee do
   puts "something"
   puts "something else"
   system("echo", "from system")
end


Head.whack! I forgot to show that this does work with system calls...