取进程的用户(所有进程)

typedef struct _UNICODE_STRING {
USHORT Length;
USHORT MaximumLength;
PWSTR Buffer;
} UNICODE_STRING, *PUNICODE_STRING;
//SystemProcessInformation
typedef struct _SYSTEM_PROCESS_INFORMATION
{
DWORD dwNextEntryOffset;
DWORD dwNumberOfThreads;
LARGE_INTEGER qSpareLi1;
LARGE_INTEGER qSpareLi2;
LARGE_INTEGER qSpareLi3;
LARGE_INTEGER qCreateTime;
LARGE_INTEGER qUserTime;
LARGE_INTEGER qKernelTime;
UNICODE_STRING ImageName;int nBasePriority;
DWORD dwProcessId;
DWORD dwInheritedFromUniqueProcessId;
DWORD dwHandleCount;
DWORD dwSessionId;
ULONG dwSpareUl3;
SIZE_T tPeakVirtualSize;
SIZE_T tVirtualSize;
DWORD dwPageFaultCount;
DWORD dwPeakWorkingSetSize;
DWORD dwWorkingSetSize;
SIZE_T tQuotaPeakPagedPoolUsage;
SIZE_T tQuotaPagedPoolUsage;
SIZE_T tQuotaPeakNonPagedPoolUsage;
SIZE_T tQuotaNonPagedPoolUsage;
SIZE_T tPagefileUsage;
SIZE_T tPeakPagefileUsage;
SIZE_T tPrivatePageCount;
LARGE_INTEGER qReadOperationCount;
LARGE_INTEGER qWriteOperationCount;
LARGE_INTEGER qOtherOperationCount;
LARGE_INTEGER qReadTransferCount;
LARGE_INTEGER qWriteTransferCount;
LARGE_INTEGER qOtherTransferCount;
}SYSTEM_PROCESS_INFORMATION;
#define SystemProcessInformation 5
#define SystemTimeOfDayInformation 3
#define SystemHandleInformation 16
#define STATUS_INFO_LENGTH_MISMATCH ((LONG)0xC0000004L)

VOID *GetDllProc(CHAR * pDllName, CHAR *pProcName)
{
HMODULE hMod;
hMod = LoadLibraryA(pDllName);if(hMod == NULL)return NULL;
return GetProcAddress(hMod, pProcName);
}

typedef LONG (WINAPI *Fun_NtQuerySystemInformation) (int SystemInformationClass,
OUT PVOID SystemInformation,
IN ULONG SystemInformationLength,
OUT ULONG * pReturnLength OPTIONAL);

BOOL NSystem::GetSysProcInfo(SYSTEM_PROCESS_INFORMATION ** ppSysProcInfo)
{
Fun_NtQuerySystemInformation _NtQuerySystemInformation;
_NtQuerySystemInformation = (Fun_NtQuerySystemInformation)::GetDllProc("NTDLL.DLL", "NtQuerySystemInformation");if(_NtQuerySystemInformation == NULL)return FALSE;

DWORD dwSize = 1024*1024;
VOID * pBuf = NULL;
LONG lRetVal;
for(;;)
{if(pBuf)
free(pBuf);
pBuf = (VOID *)malloc(dwSize);
lRetVal = _NtQuerySystemInformation(SystemProcessInformation,
pBuf, dwSize, NULL);if(STATUS_INFO_LENGTH_MISMATCH != lRetVal)break;
dwSize *= 2;
}
if(lRetVal == 0)
{*ppSysProcInfo = (SYSTEM_PROCESS_INFORMATION *)pBuf;return TRUE;
}
free(pBuf);return FALSE;
}


typedef BYTE (WINAPI *Fun_WinStationGetProcessSid)(HANDLE hServer,DWORD ProcessId , FILETIME ProcessStartTime,PBYTE pProcessUserSid ,PDWORD dwSidSize);
typedef VOID (WINAPI *Fun_CachedGetUserFromSid)( PSID pSid , PWCHAR pUserName,PULONG cbUserName);


BOOL NSystem::GetProcessUser(DWORD dwPid, _bstr_t *pbStrUser)
{
Fun_WinStationGetProcessSid _WinStationGetProcessSid;
Fun_CachedGetUserFromSid _CachedGetUserFromSid;

_WinStationGetProcessSid = (Fun_WinStationGetProcessSid)
GetDllProc("Winsta.dll", "WinStationGetProcessSid");
_CachedGetUserFromSid = (Fun_CachedGetUserFromSid)
GetDllProc("utildll.dll", "CachedGetUserFromSid");
if(_WinStationGetProcessSid == NULL || _CachedGetUserFromSid == NULL)return FALSE;

BYTE cRetVal;
FILETIME ftStartTime;
DWORD dwSize;
BYTE * pSid;
BOOL bRetVal, bFind;
SYSTEM_PROCESS_INFORMATION * pProcInfo, * pCurProcInfo;

bRetVal = GetSysProcInfo(&pProcInfo);if(bRetVal == FALSE || pProcInfo == NULL)return FALSE;

bFind = FALSE;
pCurProcInfo = pProcInfo;for(;;)
{if(pCurProcInfo->dwProcessId == dwPid)
{
memcpy(&ftStartTime, &pCurProcInfo->qCreateTime, sizeof(ftStartTime));
bFind = TRUE;break;
}
if(pCurProcInfo->dwNextEntryOffset == 0)break;
pCurProcInfo = (SYSTEM_PROCESS_INFORMATION *)((BYTE *)pCurProcInfo +
pCurProcInfo->dwNextEntryOffset);
}if(bFind == FALSE)
{
free(pProcInfo);return FALSE;
}

cRetVal = _WinStationGetProcessSid(NULL, dwPid, ftStartTime, NULL, &dwSize);if(cRetVal != 0)return FALSE;

pSid = new BYTE[dwSize];
cRetVal = _WinStationGetProcessSid(NULL, dwPid, ftStartTime, pSid, &dwSize);if(cRetVal == 0)
{
delete [] pSid;return FALSE;
}

WCHAR szUserName[1024];
dwSize = 1024;
_CachedGetUserFromSid(pSid, szUserName, &dwSize);
delete [] pSid;if(dwSize == 0)return FALSE;
*pbStrUser = szUserName;return TRUE;
}