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linux信号解释（5）--bash下的理解-Linux菜鸟
source link: http://blog.51cto.com/lythjq/2083304
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上一节中用了C语言来理解信号的处理，那么在bash中是如何理解的呢？首先我们来认识一下trap命令#typetrapo_o原来是一个shell的内建命令，大家能想想为何是内建命令吗？sh是人机对话的接口，我们发起的命令都会通过sh与内核进行打交道，那么在当前sh进程内就能及时完成信号的捕捉和处理。好了我们回到bash中如何理解呢？我们还是用回上一节的实例来做，创建一个signalshell.sh文
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