From: "Y. NOBUOKA" <nobuoka@...>
Date: 2011-04-08T17:03:13+09:00
Subject: Re: reading and writing to child process with streams in ruby

Hi,

Using IO#readpartial [1] instead of IO#read, you'll see the ruby
script run as expected.
However, I don't know if this is the best way or not.

[1] http://www.ruby-doc.org/core/classes/IO.html#M000917


----------------------------------------------------------------------
ruby script
----------------------------------------------------------------------
require 'open3'

cmd = "./myScript.bash"
#cmd = "gpg --list-keys"
begin
  stdin, stdout, stderr = Open3.popen3 cmd

  p stdin, stdout, stderr
  done = 0
  until done == 1
    begin
      # using IO#readpartial instead of IO#read
      line = stdout.readpartial( 4096 )
      puts "#{line}"
      puts line.eql?("username: ")
      if line.eql?("username: ")
        puts "myuser"
        stdin.write "myuser\n"
        # using IO#readpartial instead of IO#read
        line = stdout.readpartial( 4096 )
        if line.eql?("password: ")
          puts "mypassword"
          stdin.write "mypassword\n"
          done = 1
        end
        puts "im here!"
      end
    rescue => err
      p err
    end
  end
end


-- 
信岡 裕也 (NOBUOKA Yuya)