From: 7stud -- <bbxx789_05ss@...>
Date: 2008-05-19T16:27:13+09:00
Subject: Re: Needing to pipe commands to automate program

7stud -- wrote:
> This works too:
> 
> #original program: r1test.rb
> 
> puts "Enter 32 or 64 bit:"
> answer1 = gets.strip.chomp
> 
> puts "Enter the path where you wish to install:"
> answer2 = gets.strip.chomp
> 
> File.open('output.txt', 'w') do |f|
>   f.puts("Your answers were:")
>   f.puts answer1
>   f.puts answer2
> end
> 
> Just be aware that popen() hijacks stdin and stdout in the original 
> program--directing the original program's input and output to the IO 
> object created in the driver program.  If your original program writes 
> some results to a file, then that won't be an issue.

Whoops.  Here's the driver program:

#driver program:

pipe = IO.popen("ruby r1test.rb", "w+")
f = File.open("data.txt")

pipe.puts(f.gets.chomp)
pipe.puts(f.gets.chomp)

puts
puts "Hit enter to end program"
gets

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