We can specify new current working directory either as a pathname or though an open file descriptor.
我们可以通过文件路径或打开文件的描述符来指定新的工作目录。
The first parameter fildes is the open file descriptor returned from the function open , referring to a specific device.
第一个参数fildes是函数open返回的文件描述符，用于指称具体设备。
Monitoring applications may read event data from deleted monitor files while the file descriptor for the monitor file is still open but may not block for further event occurrences.
在监视器文件的文件描述符仍然打开的情况下，监视应用程序可以从删除的监视器文件读取事件数据，但是不再继续等待事件发生。
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