电子和窗户上的节点，杀死产生的过程 [英] electron and node on windows, kill a spawned process

问题描述

我正在从电子主电源启动Windows上的后台进程，如下所示：

i'm starting a background process (on windows) from electron main, something like this:

app_exe = require("child_process").spawn(
  "app.exe" ,
  [ "--params", ... ],
  { stdio: "ignore" }
);

这很好，我可以从流程浏览器中看到：

this works fine, i can see this from process explorer:

，但是当电子关闭时，我无法终止该过程（ .on（ closed）或 on（ window-all-closed））

but i cannot kill the process when the electron is closed ( .on("closed") or on("window-all-closed") )

我尝试了 child.kill（[signal]），也 tree-kill 或 taskkill 无结果：仅第一个进程（示例中为6036）被杀死，第二个（5760）仍然过时。

i tried child.kill([signal]), but also tree-kill or taskkill with no results: only the first process (6036 from the example) is killed, the second (5760) remains stale.

exec taskkill / F / T / PID 也不杀死

唯一杀死的方法是exec taskkill / F / IM app.exe / T ，但是这样我就不能运行两个电子应用程序实例。

the only way to kill is exec taskkill /F /IM app.exe /T, but in this way i cannot run two instances of the electron app.

我缺少了一些东西

推荐答案

我在Windows 7计算机上看到了类似的问题。我相信较新的操作系统会自动终止子进程。

I was seeing a similar issue on Windows 7 machines. I believe newer OS' will automatically kill the child processes.

我要做的就是保存生成的进程的PID，并向其发送 SIGTERM 消息可在所有窗口关闭时将其杀死。现在，如果在Electron应用程序关闭之前，该进程有可能因其他方式终止运行，则操作系统可能已回收了子进程的PID，因此，为了增强鲁棒性，我使用了 find-process npm模块以确保我持有的PID

What I had to do was to just save off the PID of the spawned-process and send it a SIGTERM message to kill it when all the windows closed. Now, if there's a chance that the process died by other means before the Electron app shut down, the OS may have recycled the child process' PID, so for extra robustness, I used the find-process npm module to make sure that the PID that I held on to is associated with the correct process.

const proc = cp.spawn("app.exe");

app.on("window-all-closed", async () => {
    const list = await require("find-process")("pid", proc.pid);
    app.quit();
    if (list[0] && list[0].name.toLowerCase() === "app.exe")
        process.kill(proc.pid);
});

现在，如果您的Electron应用无法正常退出（并且上述代码未运行），您

Now if your Electron app does not exit gracefully (and the above code isn't run), you'd have to rely on another technique.

如果您控制要生成的子进程，则可以尝试启动一个监听或ping该进程的线程。主要过程。如果没有看到主要过程，它会杀死自己。

If you control the child process that you're spawning, you can try to kick off a thread that listens to or pings the main process. If it doesn't see the main process, it can kill itself.

如果您不控制生成的应用程序，那么我就没主意了，但是上面的代码将处理大多数情况。

If you don't control the spawned-app, then I'm out of ideas, but the above code will handle most cases.

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