捕捉SIGINT在bash，手柄和忽视

本文介绍了捕捉SIGINT在bash，手柄和忽视的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

是bash中有可能拦截SIGINT，做一些事情，然后忽略它（保持的bash运行）。

Is it possible in bash to intercept a SIGINT, do something, and then ignore it (keep bash running).

我知道我可以忽略的SIGINT

I know that I can ignore the SIGINT with

trap '' SIGINT

我还可以做的东西SIGINT

And I can also do something on the sigint with

trap handler SIGINT

但是，这仍然会停止处理后的剧本执行。例如。

#!/bin/bash

handler()
{
    kill -s SIGINT $PID
}

program &
PID=$!

trap handler SIGINT

wait $PID

#do some other cleanup with results from program

当我preSS CTRL + C，在SIGINT到节目将被发送，但庆典将跳过等程序之前，正确关闭，创造它的输出在其信号处理程序。

When I press ctrl+c, the SIGINT to program will be sent, but bash will skip the wait BEFORE program was properly shut down and created its output in its signal handler.

使用@suspectus答案，我可以改变等待$ PID 来：

Using @suspectus answer I can change the wait $PID to:

while kill -0 $PID > /dev/null 2>&1
do
    wait $PID
done

这实际上对我的作品，我只是不是100％肯定，如果这是'干净'或'肮脏的解决办法。

This actually works for me I am just not 100% sure if this is 'clean' or a 'dirty workaround'.

推荐答案

陷阱从处理程序返回，但是的之后的被调用句柄时调用的命令。

trap will return from the handler, but after the command called when the handler was invoked.

因此，解决方案是一个有点笨拙，但我认为它需要什么。 陷阱处理程序INT 也可以工作。

So the solution is a little clumsy but I think it does what is required. trap handler INT also will work.

trap 'echo "Be patient"' INT

for s in 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
do
    sleep 1
done

这篇关于捕捉SIGINT在bash，手柄和忽视的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！