如何使用Python查看Windows服务依赖项? [英] How to see a Windows service dependencies with Python?

问题描述

使用Windows服务控制台，您可以在属性">依赖关系"下看到服务依赖关系.如何使用Python获得相同的信息? psutil有办法吗?

Using the Windows Services console, you can see a service dependencies under Properties > Dependencies. How you can you get the same information with Python? Is there a way to do it with psutil?

推荐答案

您可以使用subprocess模块查询sc.exe以获得服务信息，然后解析出依赖项信息.像这样:

You can use the subprocess module to query sc.exe to get info for your service and then parse out the dependencies information. Something like:

import subprocess

def get_service_dependencies(service):
    try:
        dependencies = []  # hold our dependency list
        info = subprocess.check_output(["sc", "qc", service], universal_newlines=True)
        dep_index = info.find("DEPENDENCIES")  # find the DEPENDENCIES entry
        if dep_index != -1:  # make sure we have a dependencies entry
            for line in info[dep_index+12:].split("\n"):  # loop over the remaining lines
                entry, value = line.rsplit(":", 2)  # split each line to entry : value
                if entry.strip():  # next entry encountered, no more dependencies
                    break  # nothing more to do...
                value = value.strip()  # remove the whitespace
                if value:  # if there is a value...
                    dependencies.append(value)  # add it to the dependencies list
        return dependencies or None  # return None if there are no dependencies
    except subprocess.CalledProcessError:  # sc couldn't query this service
        raise ValueError("No such service ({})".format(service))

然后，您可以轻松查询依赖项，如下所示:

Then you can easily query for dependencies as:

print(get_service_dependencies("wudfsvc"))  # query Windows Driver Foundation service
# ['PlugPlay', 'WudfPf']

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