Process wait with timeout in Ruby 1.8.x

ruby-talk
1

This is working code for Ruby 1.9.x:

require 'timeout'
pid = nil
begin
  Timeout::timeout(2) {
    pid = spawn("pause")
    Process.wait(pid)
  }
rescue Timeout::Error
  begin
    Process.kill("KILL",pid)
  rescue
  end
end

How can I do that in Ruby 1.8.x for Linux AND Windows?
Use case is to execute a system command and to kill it after a certain
time if the process does not terminate.

Thanks in advance!

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