发送信号到linux进程并拦截它们 [英] Sending signals to a linux process and intercepting them

问题描述

我有以下bash脚本:

I have a following bash script:

#!/bin/bash
for i in {0..8}
do
  trap "echo received $i" $i
done
trap "echo 'receiving the SIGINT'; kill -9  $$" INT
for i in {10..64}
do
  trap "echo receiving the $i" $i
done

sleep 1h

如果运行它，并从其他终端将SIGINT发送给它，它什么也不做.我正在使用 kill -2 pid ，其中pid是正在运行的脚本的pid.

If run it and from other terminal send the SIGINT to it, it does nothing. I am using kill -2 pid where pid is the pid of the running script.

如果我在运行脚本的终端中按下 CTRL + C (SIGINT)，它将杀死自己并编写消息.怎么了，从另一个终端向它发送信号时会不一样吗?

If I hit CTRL+C (SIGINT) in terminal where the script is running it kills itself and writes the message. How come, it is not the same when sending the signal to it from a different terminal?

推荐答案

如果我将 sleep 1h 替换为

while true ; do
    sleep 1
done

正在工作:-)

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