From: raja@... (Raja S.)
Date: 2001-01-13T02:10:02+09:00
Subject: [ruby-talk:9212] redirecting stdout  --- dup2

I can't seem to find Ruby's version of dup2 and friends.
How does one redirect output in Ruby?

I'm trying to write something along the lines of

  File.with_output_to_file ("foobar", "w") {
    puts "Hello"
    puts "World"
    system("ls")
  }

and want all output sent to "foobar".  Typically one uses 'dup2' for this.
but I can't seem to find it in Ruby.

class File
  def File.with_output_to_file (fname, mode="w", &blk)
    begin
      dout = $defout
      $defout = File.open fname, mode
      yield
    ensure
      $defout.close
      $defout = dout
    end
  end
end

is a first approximation taking care of #puts and family but not output of
child processes.  

Are dup2 and friends yet to be added to Ruby, or am I missing something?

Thanks,
Raja