从Python启动一个完全独立的过程 [英] Launch a totally independent process from Python

问题描述

我正在尝试从python启动一个完全独立的进程.我不能使用像os.startfile这样的简单内容，因为我需要传递参数.目前，我正在使用subprocess.popen，它可以让我90％地到达那里.

I'm trying to launch a completely independent process from python. I can't use something simple like os.startfile since I need to pass arguments. Currently I'm using subprocess.popen which gets me 90% of the way there.

args = ["some_exe.exe", "some_arg", "another_arg"]
subprocess.Popen(args, creationflags=DETACHED_PROCESS | CREATE_NEW_PROCESS_GROUP, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)

将popen与分离的创建标记一起使用& std *的管道确实启动了一个新进程，该进程在父进程死亡之后仍然存在.这样就很好.问题在于，新的子级"进程仍然为父级保留一个幻像句柄.因此，如果我尝试卸载父exe(我的python脚本通过pyinstaller捆绑到exe中)，则msiexec抱怨父exe仍在使用中.

Using popen with detached creation flags & pipes for std* does start a new process that lives after the parent process dies. So thats all good. The problem is that the new 'child' process still holds a phantom handle to the parent. So if I try to uninstall the parent exe (my python script is bundled into an exe via pyinstaller) msiexec complains that the parent exe is still in use.

因此，目标是产生一个完全独立的进程来运行"some_exe.exe"，而该进程没有返回原始进程的任何句柄.

So the goal is to spawn a totally independent process to run "some_exe.exe" that doesn't have any handle back to the original process.

注意:这适用于Windows XP及更高版本.我正在Win7上进行开发.

Note: This is for Windows XP and above. I'm developing on Win7.

推荐答案

我想我找到了答案.通过将Popen与close_fds = True结合使用，我可以启动一个独立且没有父级句柄的进程.

I think I found the answer. By using Popen with close_fds = True I was able to start up a process that was independent and without handles to the parent.

对于文档，请此处，然后搜索close_fds.

For docs look here and search for close_fds.

或者，在Windows上，如果close_fds为true，则不会继承任何句柄 通过子进程.请注意，在Windows上，您无法设置close_fds 设置为true并通过设置stdin重定向标准句柄， 标准输出或标准错误.

Or, on Windows, if close_fds is true then no handles will be inherited by the child process. Note that on Windows, you cannot set close_fds to true and also redirect the standard handles by setting stdin, stdout or stderr.

请注意，此解决方案仅适用于Windows.我不知道任何* nix系统.

Note this solution only works on Windows. I have no idea about any *nix system.

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