在捕获中断后如何使Bash的读取中止？

考虑：

$cat b.sh
#!/bin/bash

trap 'echo $$was interrupted' INT
read foo
echo done
$./b.sh
^C27104 was interrupted
^C27104 was interrupted
^C27104 was interrupted
done
$

(ctrl-c被击中3次,然后是ctrl-d)

我希望执行陷阱后读取中止.是否有一种干净的方法来实现这一目标？

似乎没有立即中断是Bash非POSIX扩展(请参阅Bash内置源的read.def中的read_builtin(查找posixly_correct)).

您可以覆盖此行为,并通过强制读取POSIX行为(通过设置POSIXLY_CORRECT环境变量)退出第一个Ctrl C：

#!/bin/bash
trap 'echo $$was interrupted' INT
POSIXLY_CORRECT=1 read foo
echo done