code: def _linux_wwns():
      '''
      Return Fibre Channel port WWNs from a Linux host.
      '''
      ret = []
      for fc_file in glob.glob('/sys/class/fc_host/*/port_name'):
          with salt.utils.files.fopen(fc_file, 'r') as _wwn:
              content = _wwn.read()
              for line in content.splitlines():
                  ret.append(line.rstrip()[2:])
      return ref _linux_wwns():
      '''
      Return Fibre Channel port WWNs from a Linux host.
      '''
      ret = []
      for fc_file in glob.glob('/sys/class/fc_host/*/port_name'):
          with salt.utils.files.fopen(fc_file, 'r') as _wwn:
              content = _wwn.read()
              for line in content.splitlines():
                  ret.append(line.rstrip()[2:])
      return ret
docs: Return Fibre Channel port WWNs from a Linux host.