code: def set_boot_script(self, filename):
          
          data = {}
          with open(filename) as f:
              data['user-script'] = f.read()
          j, r = self.datacenter.request('POST', self.path + '/metadata', 
                      data=data)
          r.raise_for_status()
          self.boot_script = data['user-script']
docs: ::
          
              POST /:login/machines/:id/metadata
          
          :param filename: file path to the script to be uploaded and executed
              at boot on the machine
          :type filename: :py:class:`basestring`
          
          Replace the existing boot script for the machine with the data in the 
          named file.
  
          .. Note:: The SMF service that runs the boot script will kill processes
             that exceed 60 seconds execution time, so this is not necessarily 
             the best vehicle for long ``pkgin`` installations, for example.