Shell 中获取信号的例子

#! /bin/sh

i=10

while [ $i -ge 1 ]

do 
   echo "i = $i"
   let i=$i-1

   echo "123423804sdfsdfsdfdsf8" > /dev/spidev1.0
   echo "123423804sdfsdfsdfdsf8" > /dev/spidev2.0

   trap "echo "get signal!"" SIGINT
  
   sleep 10
  
done

echo "ending"

测试方法：

1. 运行脚本 ps 找出当前运行脚本的 PID 值 pid_num

2. 向进程发送信号 SIGINT

     kill -2 pid_num

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