Bash，eval 中的 CTRL+C 不会中断主脚本

在我的 bash 脚本中，我正在运行存储在中的外部命令$cmd多变的。 （它可以是任何东西，甚至是一些简单的 bash oneliner。）

If ctrl+C is pressed while running the script, I want it to kill the currently running $cmd but it should still continue running the main script. However, I would like to preserve the option to kill the main script with ctrl+C when the main script is running.

#!/bin/bash
cmd='read -p "Ooook?" something; echo $something; sleep 4 ' 
while true; do
    echo "running cmd.."
    eval "$cmd"     # ctrl-C now should terminate the eval and print "done cmd"
    echo "done cmd"
    sleep 5         # ctrl-C now should terminate the main script
done

知道如何用一些不错的 bash 方式来做吗？

根据答案应用的更改：

#! /bin/bash

cmd='read -p "Ooook1?" something; read -p "Oook2?" ; echo $something; sleep 4 ' 
while true; do
    echo "running cmd.."
    trap "echo Interrupted" INT
    eval "($cmd)"     # ctrl-C now should terminate the eval and print "done cmd"
    trap - INT
    echo "done cmd"
    sleep 5         # ctrl-C now should terminate the main script
done

Now, pressing ctrl+C while "Ooook1?" read will break the eval only after that read is done. (it will interrupt just before "Oook2") However it will interrupt "sleep 4" instantly.

在这两种情况下，它都会做正确的事情 - 它只会中断 eval 子 shell，所以我们就快到了 - 只是那种奇怪的读取行为。

如果您有能力拥有eval部分在子 shell 中运行，您需要做的“所有”就是捕获 SIGINT。

#! /bin/bash

cmd='read -p "Ooook1?" something; read -p "Oook2?" ; echo $something; sleep 4 ' 
while true; do
    echo "running cmd.."
    trap "echo Interrupted" INT
    eval "($cmd)"     # ctrl-C now should terminate the eval and print "done cmd"
    trap - INT
    echo "done cmd"
    sleep 5         # ctrl-C now should terminate the main script
done

但不知道这是否适合您的特定需求。

$ ./t.sh 
running cmd..
Ooook1?^CInterrupted
done cmd
^C
$ ./t.sh 
running cmd..
Ooook1?qsdqs^CInterrupted
done cmd
^C
$ ./t.sh 
running cmd..
Ooook1?qsd
Oook2?^CInterrupted
done cmd
^C
$ 
GNU bash, version 4.1.9(2)-release (x86_64-pc-linux-gnu)