+ record_size_32 = struct.calcsize(self.LASTLOG_STRUCT_32)
+ record_size_64 = struct.calcsize(self.LASTLOG_STRUCT_64)
+ lastlog_size = os.path.getsize('/var/log/lastlog')
+ if 0 == (lastlog_size % record_size_32):
+ self.LASTLOG_STRUCT = self.LASTLOG_STRUCT_32
+ record_size = record_size_32
+ elif 0 == (lastlog_size % record_size_64):
+ self.LASTLOG_STRUCT = self.LASTLOG_STRUCT_64
+ record_size = record_size_64
+ else:
+ raise RuntimeError('Unknown architecture, cannot interpret /var/log/lastlog file size (%d)' % lastlog_size)