Java:杀死Unix上的所有子进程 [英] Java: Kill all subprocesses on unix

问题描述

我有一个用Java编写的应用程序，该应用程序可在Unix上运行，并在启动时启动两个子进程(通过Runtime.getRuntime().exec()).如果应用程序由于某种原因而崩溃，则子进程将不会被杀死.

I got an application written in java which runs on Unix and starts two sub-processes (via Runtime.getRuntime().exec()) on startup. If the application crashed for some reason, the sub processes won't get killed.

现在，我添加了一个关闭钩子，到目前为止，每次崩溃都会触发该钩子.但是我想在UNIX控制台上为应用程序的每个子进程发送一个SIGTERM信号(或者至少是SIGINT).我应该能够通过ps找到他们的进程ID，但是我没有正确地提取PID并为每个进程发送信号.

Now, I added a shutdown hook which gets fired on every crash, ok so far. But I'd like to send a SIGTERM signal (or at least SIGINT) on UNIX console for every sub process of the application. I should be able to find their process IDs via ps, but I did not make it to extract the PID correctly and send a signal for every process.

任何人都可以帮忙吗?

非常感谢！

推荐答案

我建议的不是官方功能，而是技巧.

What I'm suggesting it is not an official feature, but a tricks.

这是我获取Java应用程序的进程ID的方式.我再也找不到其他方法了.

This is how I get process id for my java applications. I never found another way.

public static final String getPid() {
    try {
        RuntimeMXBean runtimeBean = ManagementFactory.getRuntimeMXBean();
        String name = runtimeBean.getName();
        int k = name.indexOf('@');
        if (k > 0)
            return name.substring(0, k);
    } catch (Exception ex) {
    }
    return null;
}

这适用于Win，Mac和Linux.

This works on win, mac and linux.

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