如何使用Python查看Windows服务依赖关系？

Question

使用Windows服务控制台，可以在“属性”>“依赖项”下看到服务依赖项。你如何使用Python获得相同的信息？有没有办法与psutil做到这一点？

Answer 1

您可以使用subprocess模块查询sc.exe以获取您的服务信息，然后解析出依赖关系信息。喜欢的东西：

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)) 

然后你就可以轻松地查询依赖关系：

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