事件驱动
在shell脚本里使用mkfifo命令创建named pipes可以实现简单的事件驱动， 避免poll（轮询）带来的时延（not real-time）和资源消耗的问题。 mkfifo 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ❯ man mkfifo | head -n 12 MKFIFO(1) General Commands Manual MKFIFO(1) NAME mkfifo – make fifos SYNOPSIS mkfifo [-m mode] fifo_name ... DESCRIPTION mkfifo creates the fifos requested, in the order specified. By default, the resulting fifos have mode 0666 (rw-rw-rw-), limited by the current umask(2). ~ consumer 消费者以blocked的状态监听事件的发生，然后handle: ...