[weiden] 20971: try to get the user from the token and fall back to reading the owner from the process when needed

try to get the user from the token and fall back to reading the owner
from the process when needed
Modified: trunk/reactos/subsys/system/taskmgr/perfdata.c
  _____  

Modified: trunk/reactos/subsys/system/taskmgr/perfdata.c
--- trunk/reactos/subsys/system/taskmgr/perfdata.c	2006-01-22
03:53:02 UTC (rev 20970)
+++ trunk/reactos/subsys/system/taskmgr/perfdata.c	2006-01-22
04:20:30 UTC (rev 20971)
@@ -92,14 +92,16 @@

     PPERFDATA                        pPDOld;
     ULONG                            Idx, Idx2;
     HANDLE                            hProcess;
+    HANDLE                            hProcessToken;
     SYSTEM_PERFORMANCE_INFORMATION    SysPerfInfo;
     SYSTEM_TIMEOFDAY_INFORMATION      SysTimeInfo;
     SYSTEM_CACHE_INFORMATION        SysCacheInfo;
     LPBYTE                            SysHandleInfoData;
     PSYSTEM_PROCESSOR_PERFORMANCE_INFORMATION SysProcessorTimeInfo;
     double                            CurrentKernelTime;
-    PSECURITY_DESCRIPTOR              ProcessSD = NULL;
+    PSECURITY_DESCRIPTOR              ProcessSD;
     PSID                              ProcessUser;
+    ULONG                             Buffer[64]; /* must be 4 bytes
aligned! */
 
     /* Get new system time */
     status = NtQuerySystemInformation(SystemTimeOfDayInformation,
&SysTimeInfo, sizeof(SysTimeInfo), 0);
@@ -281,15 +283,41 @@
         pPerfData[Idx].ThreadCount = pSPI->NumberOfThreads;
         pPerfData[Idx].SessionId = pSPI->SessionId;
         pPerfData[Idx].UserName[0] = _T('\0');
+        pPerfData[Idx].USERObjectCount = 0;
+        pPerfData[Idx].GDIObjectCount = 0;
         ProcessUser = SystemUserSid;
+        ProcessSD = NULL;
 
         if (pSPI->UniqueProcessId != NULL) {
             hProcess = OpenProcess(PROCESS_QUERY_INFORMATION |
READ_CONTROL, FALSE, PtrToUlong(pSPI->UniqueProcessId));
             if (hProcess) {
-                GetSecurityInfo(hProcess, SE_KERNEL_OBJECT,
OWNER_SECURITY_INFORMATION, &ProcessUser, NULL, NULL, NULL, &ProcessSD);
+                /* don't query the information of the system process.
It's possible but
+                   returns Administrators as the owner of the process
instead of SYSTEM */
+                if (pSPI->UniqueProcessId != (HANDLE)0x4)
+                {
+                    if (OpenProcessToken(hProcess, TOKEN_QUERY,
&hProcessToken))
+                    {
+                        DWORD RetLen = 0;
+                        BOOL Ret;
 
-                pPerfData[Idx].USERObjectCount =
GetGuiResources(hProcess, GR_USEROBJECTS);
-                pPerfData[Idx].GDIObjectCount =
GetGuiResources(hProcess, GR_GDIOBJECTS);
+                        Ret = GetTokenInformation(hProcessToken,
TokenUser, (LPVOID)Buffer, sizeof(Buffer), &RetLen);
+                        CloseHandle(hProcessToken);
+
+                        if (Ret)
+                            ProcessUser =
((PTOKEN_USER)Buffer)->User.Sid;
+                        else
+                            goto ReadProcOwner;
+                    }
+                    else
+                    {
+ReadProcOwner:
+                        GetSecurityInfo(hProcess, SE_KERNEL_OBJECT,
OWNER_SECURITY_INFORMATION, &ProcessUser, NULL, NULL, NULL, &ProcessSD);
+                    }
+
+                    pPerfData[Idx].USERObjectCount =
GetGuiResources(hProcess, GR_USEROBJECTS);
+                    pPerfData[Idx].GDIObjectCount =
GetGuiResources(hProcess, GR_GDIOBJECTS);
+                }
+
                 GetProcessIoCounters(hProcess,
&pPerfData[Idx].IOCounters);
                 CloseHandle(hProcess);
             } else {
@@ -298,8 +326,6 @@
         } else {
 ClearInfo:
             /* clear information we were unable to fetch */
-            pPerfData[Idx].USERObjectCount = 0;
-            pPerfData[Idx].GDIObjectCount = 0;
             ZeroMemory(&pPerfData[Idx].IOCounters,
sizeof(IO_COUNTERS));
         }