C++ 如何从进程ID获取进程句柄？
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how to get process handle from process id?
提问by anand
I have process Id , I want to get its process handle.
我有进程 Id ，我想得到它的进程句柄。
Is there any API available for that.
是否有任何可用的 API。
I tried to use OpenProcess but it returns NULL, and GetLastError =0.
我尝试使用 OpenProcess，但它返回 NULL，并且 GetLastError =0。
This I am trying on Vista.
这是我在 Vista 上尝试的。
I guess I need to enable SeDebugPrivilege before using OpenProcess . But for enabling SeDebugPrivilege I need to get its Process handle.
我想我需要在使用 OpenProcess 之前启用 SeDebugPrivilege 。但是为了启用 SeDebugPrivilege，我需要获取它的 Process 句柄。
回答by Matt Joiner
OpenProcess(PROCESS_ALL_ACCESS, TRUE, procId);
You'll need to verify that you're using a valid process ID, and that you're permitted the access rights you request from the process.
您需要验证您使用的是有效的进程 ID，并且您被允许从该进程请求访问权限。
回答by bdd
Is this what you are looking for?
这是你想要的？
HANDLE processHandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId);
CloseHandle(processHandle);
Also, here is some code I use to set debug privledge before injecting DLLs.
另外，这里有一些代码我用来在注入 DLL 之前设置调试权限。
void Loader::EnableDebugPriv(void)
{
HANDLE hToken;
LUID SeDebugNameValue;
TOKEN_PRIVILEGES TokenPrivileges;
if(OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
{
if(LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &SeDebugNameValue))
{
TokenPrivileges.PrivilegeCount = 1;
TokenPrivileges.Privileges[0].Luid = SeDebugNameValue;
TokenPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if(AdjustTokenPrivileges(hToken, FALSE, &TokenPrivileges, sizeof(TOKEN_PRIVILEGES), NULL, NULL))
{
CloseHandle(hToken);
}
else
{
CloseHandle(hToken);
throw std::exception("Couldn't adjust token privileges!");
}
}
else
{
CloseHandle(hToken);
throw std::exception("Couldn't look up privilege value!");
}
}
else
{
throw std::exception("Couldn't open process token!");
}
}
I've used the above code on Windows Vista with success.
我在 Windows Vista 上成功使用了上面的代码。
回答by trgs
I just had the exact same issue as described: OpenProcess() == NULL and GetLastError() == 0. Turned out to be the Common Language RunTime Support setting, was set to "Pure" should have been just "Common". Took me ages to find.
我只是遇到了与描述完全相同的问题：OpenProcess() == NULL 和 GetLastError() == 0。原来是公共语言运行时支持设置，设置为“纯”应该只是“通用”。我花了很长时间才找到。
For VS2010 c++ goto -> Project Properties -> Configuration Properties -> C/C++ -> General
对于VS2010 c++ goto -> Project Properties -> Configuration Properties -> C/C++ -> General
回答by herodot
If you have a process identifier, you can get the process handle by calling the OpenProcessfunction. OpenProcessenables you to specify the handle's access rights and whether it can be inherited.
如果您有进程标识符，则可以通过调用OpenProcess函数来获取进程句柄。OpenProcess使您能够指定句柄的访问权限以及它是否可以被继承。
FYI:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms684868(v=vs.85).aspx
仅供参考：http: //msdn.microsoft.com/en-us/library/windows/desktop/ms684868(v=vs.85)
.aspx
