停止bash脚本时运行命令

How can i, in a bash script, execute a command when the user stops the script (with ctrl - c)?

我怎样才能在bash脚本中执行命令,当用户停止脚本时(使用ctrl -c)?

Currently, i have this:

目前,我有这个:

afplay file.mp3

while true:
do osascript -e "set volume 10"
end

But i would like it to execute killall afplay when the user is finished with it, regardless if it is command-c or another keypress.

但是我想在用户完成它时执行killall afplay,无论它是command-c还是其他按键。

3 个解决方案

#1

trap 'killall afplay' EXIT

陷阱'killall afplay'EXIT

#2

Use trap.

trap "kill $pid" INT TERM EXIT

Also avoid killall or pkill, since it could kill unrelated processes (for instance, from another instance of your script, or even a different script). Instead, put the player's PID in a variable and kill only that PID.

还要避免使用killall或pkill,因为它可以杀死不相关的进程(例如,来自脚本的另一个实例,甚至是不同的脚本)。相反,将玩家的PID放在变量中并仅杀死该PID。

#3

You need to put a trap statement in your bash script:

您需要在bash脚本中放置一个trap语句:

trap 'killall afplay' EXIT

Note however that this won't work if the bash process is sent a KILL signal (9) as it's not possible for processes to intercept that signal.

但是请注意,如果bash进程发送了KILL信号(9),这将不起作用,因为进程无法拦截该信号。

#1