docs: def is_smartos_globalzone():
      '''
      Function to return if host is SmartOS (Illumos) global zone or not
      '''
      if not is_smartos():
          return False
      else:
          cmd = ['zonename']
          try:
              zonename = subprocess.Popen(
                  cmd, shell=False,
                  stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          except OSError:
              return False
          if zonename.returncode:
              return False
          if zonename.stdout.read().strip() == 'global':
              return True
  
          return False