From: han.holl@... (Han Holl)
Date: 2003-03-08T00:36:05+09:00
Subject: Re: pty & signals with wrapped shell

Doug Beaver <doug@beaver.net> wrote in message news:<20030306222419.A84092@beaver.net>...
> hello,

[ cut ]
>   input, output, pid = PTY.spawn(shell)
>   puts "input, output, pid = #{input}, #{output}, #{pid}"
>   Thread.new do
>     while true
>       output.print STDIN.getc.chr
>       output.flush
>     end
>   end
>
In a recent thread on pty matz asserted that you must do:
  PTY.spawn(shell) do |input, output, pid|
  # rest of handling here
  end

I don't know if this helps you with your problem or not.
I find that I also must wrap in 'PTY.protect_signal do ... end' or
I get the dreaded 'child_changed' exception, but maybe that's not 
necessary for your application.

Cheers,

Han Holl