我尝试用sc delete <服务名>删除一个Windows服务,并遇到以下错误:
[SC] DeleteService FAILED 1072:
指定的服务已标记为删除。
我已经做了:
Stopped the service, obviously. The sc queryex "<service name>" gives the following result:
SERVICE_NAME: Stub service
TYPE : 10 WIN32_OWN_PROCESS
STATE : 1 STOPPED
WIN32_EXIT_CODE : 1067 (0x42b)
SERVICE_EXIT_CODE : 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x0
PID : 0
FLAGS :
Ensured that Microsoft Management Console is closed (taskkill /F /IM mmc.exe),
Ensured that Event Viewer is closed,
Removed the key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\<service name> from the registry.
Due to this removal, services.msc still shows the service (with a name, but no status or startup type), but the description is “<Failed to Read Description. Error Code: 2 >”. When attempting to view the properties, “The system cannot find the file specified.” is shown five times.
问题依然存在。
下一步是什么?
似乎在Windows 7之后的Windows版本上(未经验证,但根据最新的Windows Server 2012 R2经验),服务控制管理器(SCM)更加严格。
而在Windows 7上,它只是生成另一个进程,它现在正在检查服务进程是否仍然存在,并且可能为任何后续调用CreateService/ deleeservice返回ERROR_SERVICE_MARKED_FOR_DELETE(1072),即使服务似乎已经停止。
我在这里谈论的是Windows API代码,但我想清楚地概述发生了什么,所以这个序列可能会导致上述错误:
SC_HANDLE hScm = OpenSCManager(nullptr, nullptr, SC_MANAGER_ALL_ACCESS);
SC_HANDLE hSvc = OpenService(hScm, L"Stub service", SERVICE_STOP | SERVICE_QUERY_STATUS | DELETE);
SERVICE_STATUS ss;
ControlService(hSvc, SERVICE_CONTROL_STOP, &ss);
// ... wait for service to report its SERVICE_STOPPED state
DeleteService(hSvc);
CloseServiceHandle(hSvc);
hSvc = nullptr;
// any further calls to CreateService/DeleteService will fail
// if service process is still around
服务进程在报告SERVICE_STOPPED状态后仍然存在的原因并不令人惊讶。这是一个常规进程,其主线程在对StartServiceCtrlDispatcher API的调用中被“卡住”,因此它首先对停止控制动作做出反应,但随后必须执行剩余的代码序列。
不幸的是,SCM/OS没有正确地为我们处理这个问题。
编程解决方案比较简单和准确:在停止服务之前获取服务可执行文件的进程句柄,然后等待这个句柄变成有信号的。
如果从系统管理的角度来处理这个问题,那么解决方案也是等待服务流程完全消失。