class Selenium::WebDriver::ChildProcess

def start
  options = {%i[out err] => io}
  options[:pgroup] = true unless Platform.windows? # NOTE: this is a bug only in Windows 7
  WebDriver.logger.debug("Starting process: #{@command} with #{options}", id: :process)
  @pid = Process.spawn(*@command, options)
  WebDriver.logger.debug("  -> pid: #{@pid}", id: :process)
  Process.detach(@pid) if detach
end