I want to do something like this:

    # open a session
    @session = IO.popen('cmd.exe', 'r+')

    # run a command and process outputs
    @session.puts('dir')
    @session.each do |line|
      p line
    end

    # run a command line application
    @session.puts('robocopy.exe ......')
    @session.each do |line|
      p line
    end

The issue is that "@session.each" never stop. It waits when cmd.exe
waiting for input. So the scripts hang.

Thanks!

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