def _bcsys(dev, name, value=None, log_lvl=None, log_msg=None):
 return _sysfs_attr([_bcpath(dev), name], value, log_lvl, log_msg)

def _bcsys ( dev , name , value = None , log_lvl = None , log_msg = None ) : return _sysfs_attr ( [ _bcpath ( dev ) , name ] , value , log_lvl , log_msg )
simple wrapper to interface with backing devs sysfs .