尝试实施一个穷人对流程是否仍在运行的测试(基本上相当于简单的kill(pid, 0)
。)
希望只需调用OpenProcess
一些最低限度的访问权限,然后测试GetLastError() == ERROR_INVALID_PARAMETER
或GetExitCodeProcess(...) != STILL_ACTIVE
。
很好的尝试...以管理员身份在Windows XP上运行:
HANDLE hProc = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
if (!hProc) {
DWORD dwLastError = GetLastError();
}
当dwLastError == ERROR_ACCESS_DENIED
由另一个(非SYSTEM)用户拥有时, ...与pid
失败。此外,如果pid
最初由其他用户拥有但已终止,OpenProcess
也会因ERROR_ACCESS_DENIED
(而不是ERROR_INVALID_PARAMETER
而失败。)< / p>
我是否必须使用Process32First
/ Process32Next
或EnumProcesses
?
我绝对不想使用SeDebugPrivilege
。
谢谢, V
答案 0 :(得分:1)
如果您有进程ID:
// this should succeed even when a medium integrity process
// requests access to a high integrity process
if (HANDLE h = OpenProcess(SYNCHRONIZE, FALSE, pid))
{
// do a wait, if the handle is signaled: not running
DWORD wait = WaitForSingleObject(h, 0);
if (wait == WAIT_OBJECT_0) return FALSE;
}
// cannot get a handle to the process:
// probably running at system integrity level
// I'm not sure how reliable this check is, but it seems to work:
// if access is denied: running
// if invalid parameter: not running
else if (GetLastError() != ERROR_ACCESS_DENIED) return FALSE;
如果你有一个窗口句柄,只要进程正在运行就应该有效,这是一个很好的选择:
if (hWnd && !IsWindow(hWnd)) return FALSE;
答案 1 :(得分:0)
static BOOL
isProcessAlive(DWORD th32ProcessID) {
BOOL bSuccess = FALSE;
HANDLE hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (hSnap != INVALID_HANDLE_VALUE) {
PROCESSENTRY32 pe32 = { sizeof(pe32), 0 };
if (Process32First(hSnap, &pe32)) {
while (pe32.th32ProcessID != pid && Process32Next(hSnap, &pe32));
_ASSERT(GetLastError() == 0 || GetLastError() == ERROR_NO_MORE_FILES);
bSuccess = (pe32.th32ProcessID == th32ProcessID);
}
CloseHandle(hSnap);
}
return bSuccess;
}