From: "Suraj N. Kurapati" <skurapat@...>
Date: 2006-10-09T08:44:20+09:00
Subject: Re: ruby/GTK : Embedded terminal or redirecting process output

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Mickael Faivre-Macon wrote:
> Using ruby-gnome2 (gtk) I'd like to embed a terminal in a window, or
> redirect the output of a child process into a text editor.
> 
> Something like
>       sbtn.signal_connect("pressed") {
>          system('ls')
>          }
> 
> ... launch the command 'ls' but is not portable and

If you just want to get a list of files in a directory, Ruby
provides the portable Dir#entries method.

> I don't know how to
> redirect the output into a gtk text editor, not in the original
> terminal window.

I'm sure the gtk text editor has some #append or #insert method
which lets you add text to it. Use that.

> 
> Something like
>       sbtn.signal_connect("pressed") {
>          lsproc = IO.popen('ls')
>          p Process.waitpid(lsproc.pid)
>          p $?
>          }
> ... is portable, but still does not redirect the output.

IO.popen('ls') do |f|
  puts f.read
end


If you want to "pipe" some data to the subprocess:

request = "i want ice cream!"

IO.popen('cat', 'r+') do |f|
  f.write request
  f.close_write

  response = f.read
  puts "cat said: #{response}"
end

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