On the first two lines, we explicitly tell devfsd to not perform any special actions when any pseudo-terminal devices are registered with the kernel, or when their attributes are changed. 在头两行中,显式地告诉devfsd,当内核中注册了任何伪终端设备或当它们的属性被更改时,不要执行任何特殊的操作。
This isn't optimal since we should always have a fresh set of default perms on our pseudo-terminal devices right after the system starts up. 那样做不太理想,因为应该总是在系统启动之后给予伪终端一套新的缺省许可权。