From: Pito Salas <rps@...>
Date: 2009-08-25T05:36:23+09:00
Subject: Re: Asynchronous process to process pipe IO

Pito Salas wrote:

> Yes it does. Double-hm.
> 
> My case is using a second ruby file, iacommand.rb, which is doing much 
> the same as what your -e is doing. I wonder if that makes the 
> difference? Or it must be something else.

It does seem to be the difference between ruby -e and ./iacommand.rb. 
Can anyone see what the key is??

Thanks!!

Here's what fails (that is, blocks) (tested both in irb and in eclipse)

open("|-", "r") do |worker|
   if worker
     i = 0
     worker.each_line do |line|
       puts "line #{i}:#{line}"
       i = i+1
     end
   else
     exec("./iacommand.rb", "-t")
   end
end


And here's the exact text of iacommand.rb:


require 'rubygems'
require 'getoptlong'

parser = GetoptLong.new
parser.set_options(
              ["-h", "--help", GetoptLong::NO_ARGUMENT],
              ["-t", "--test", GetoptLong::NO_ARGUMENT],
              ["-v", "--version", GetoptLong::NO_ARGUMENT])

valid = false
loop do

  begin
    opt, arg = parser.get
    break if not opt
    case opt
      when "-h"
        puts "Usage: ..."
        valid = true
        break
      when "-t"
        valid = true
        break
      when "-v"
        puts "Version 0.0"
        valid = true
        break
      end
    end
  end

if valid
   puts "start"
   i = 0
    5.times do
    puts "ballot #{i}"
    delay = rand(5).to_i
    sleep delay
    i = i+1
  end
  puts "exit"
else
  puts "invalid parameters for iacommand"
end




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