如何在shell脚本中断时触发命令?

Jat*_*rya 5 bash shell sh interrupt-handling

rm -rf /etc/XXX.pid当shell脚本在执行过程中被中断时,我想发出像" " 这样的命令.喜欢使用CTRL+C 任何人都可以帮我在这做什么?

pax*_*blo 9

虽然它可能会让许多人感到震惊,但您可以使用bash内置trap陷阱信号:-)

好吧,至少那些可以被困住的,但CTRL-C通常与INT信号有关.您可以捕获信号并执行任意代码.

以下脚本将要求您输入一些文本,然后将其回显给您.如果偶然,你产生一个INT信号,它只会咆哮你并退出:

#!/bin/bash

exitfn () {
    trap SIGINT              # Restore signal handling for SIGINT
    echo; echo 'Aarghh!!'    # Growl at user,
    exit                     #   then exit script.
}

trap "exitfn" INT            # Set up SIGINT trap to call function.

read -p "What? "             # Ask user for input.
echo "You said: $REPLY"

trap SIGINT                  # Restore signal handling to previous before exit.
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测试运行记录如下(完全输入的行,在任何条目之前按下CTRL-C的行,以及在按CTRL-C之前具有部分条目的行):

pax> ./testprog.sh 
What? hello there
You said: hello there

pax> ./testprog.sh 
What? ^C
Aarghh!!

pax> ./qq.sh
What? incomplete line being entere... ^C
Aarghh!!
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