在 Windows 中等待孙子进程 [英] Waiting for grandchild processes in windows

问题描述

是否可以在 Windows 中等待子进程启动的所有进程?我无法修改子进程或孙进程.

Is it possible to wait for all processes launched by a child process in Windows? I can't modify the child or grandchild processes.

具体来说，这就是我想要做的.我的进程启动uninstallA.exe.uninistallA.exe进程启动uninstallB.exe并立即退出，uninstallB.exe运行一段时间.我想等待uninstallB.exe退出，以便知道卸载何时完成.

Specifically, here's what I want to do. My process launches uninstallA.exe. The process uninistallA.exe launches uninstallB.exe and immediately exits, and uninstallB.exe runs for a while. I'd like to wait for uninstallB.exe to exit so that I can know when the uninstall is finished.

推荐答案

使用 CreateJobObject 创建作业对象.使用 CreateProcess 以暂停状态启动 UninstallA.exe.使用 AssignProcessToJobObject 将该新流程分配给您的作业对象.通过对从 CreateProcess 返回的线程句柄调用 ResumeThread 来启动 UninstallA.exe 运行.

Create a Job Object with CreateJobObject. Use CreateProcess to start UninstallA.exe in a suspended state. Assign that new process to your job object with AssignProcessToJobObject. Start UninstallA.exe running by calling ResumeThread on the handle of the thread you got back from CreateProcess.

然后是困难的部分:等待作业对象完成其执行.不幸的是，这比任何人合理希望的要复杂得多.基本思路是先创建一个 I/O 完成端口，然后创建对象对象，将其与 I/O 完成端口关联，最后等待 I/O 完成端口(通过 GetQueuedCompletionStatus 获取其状态)).Raymond Chen 在他的 博客上进行了演示(并解释了这是如何发生的).

Then the hard part: wait for the job object to complete its execution. Unfortunately, this is quite a bit more complex than anybody would reasonably hope for. The basic idea is that you create an I/O completion port, then you create the object object, associate it with the I/O completion port, and finally wait on the I/O completion port (getting its status with GetQueuedCompletionStatus). Raymond Chen has a demonstration (and explanation of how this came about) on his blog.

这篇关于在 Windows 中等待孙子进程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IT屋！