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Re: Popen3 Problem

Dec 14th, 2008

I figured it out!

It wasn't that the program wasn't exiting. Ruby didn't know how to handle a nil variable in my code.

I changed my start_read function to:

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def start_read( stdout , stderr )
  puts("Read thread is running ...")
  loop do
    # errorline = stderr.readline
    #puts("STDOUT #{errorline}")
    the_input = stdout.getc
    if the_input == nil                        # <=== This is what I added.
      Thread.kill(@write_thread)          #
      break                                          #
    end                                               #
    nodeSendData( @node_number, the_input.chr )
    STDOUT.flush
  end
end
def start_read( stdout , stderr )
  puts("Read thread is running ...")
  loop do
    # errorline = stderr.readline
    #puts("STDOUT #{errorline}")
    the_input = stdout.getc
    if the_input == nil                        # <=== This is what I added.
      Thread.kill(@write_thread)          #
      break                                          #
    end                                               #
    nodeSendData( @node_number, the_input.chr )
    STDOUT.flush
  end
end

So, when the program exits the input becomes nil. After discovering that it is nil, I killed the other thread. Everything works great now.

Thanks for nobody's help

- Matt