[akhaldi] 50822: [EVENTVWR] - Fix handling of NULL lpComputerName. - Handle lpData conversion to a wide string and make sure it's NULL terminated. - Patch by Rafal Harabien, <rafalh1992 AT o2 DOT p...

Author: akhaldi
Date: Sat Feb 19 21:24:47 2011
New Revision: 50822
URL: http://svn.reactos.org/svn/reactos?rev=50822&view=rev
Log:
[EVENTVWR]
- Fix handling of NULL lpComputerName.
- Handle lpData conversion to a wide string and make sure it's NULL terminated.
- Patch by Rafal Harabien, <rafalh1992 AT o2 DOT pl>
See issue #5926 for more details.
Modified:
    trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c
Modified: trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/applications/mscutils…
==============================================================================
--- trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c [iso-8859-1] (original)
+++ trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c [iso-8859-1] Sat Feb 19
21:24:47 2011
@@ -503,11 +503,12 @@
     HWND hwndDlg;
     HANDLE hEventLog;
     EVENTLOGRECORD *pevlr;
-    DWORD dwRead, dwNeeded, dwThisRecord, dwTotalRecords = 0, dwCurrentRecord = 1,
dwRecordsToRead = 0, dwFlags;
+    DWORD dwRead, dwNeeded, dwThisRecord, dwTotalRecords = 0, dwCurrentRecord = 1,
dwRecordsToRead = 0, dwFlags, dwMaxLength;
     LPWSTR lpSourceName;
     LPWSTR lpComputerName;
-    LPWSTR lpData;
+    LPSTR lpData;
     BOOL bResult = TRUE; /* Read succeeded. */
+    int i;
     WCHAR szWindowTitle[MAX_PATH];
     WCHAR szStatusText[MAX_PATH];
@@ -519,6 +520,7 @@
     WCHAR szUsername[MAX_PATH];
     WCHAR szEventText[EVENT_MESSAGE_FILE_BUFFER];
     WCHAR szCategory[MAX_PATH];
+    WCHAR szData[MAX_PATH];
     SYSTEMTIME time;
     LVITEMW lviEventItem;
@@ -606,7 +608,7 @@
             lpComputerName = (LPWSTR)((LPBYTE)pevlr + sizeof(EVENTLOGRECORD) +
(wcslen(lpSourceName) + 1) * sizeof(WCHAR));
             // This ist the data section of the current event
-            lpData = (LPWSTR)((LPBYTE)pevlr + pevlr->DataOffset);
+            lpData = (LPSTR)((LPBYTE)pevlr + pevlr->DataOffset);
             // Compute the event type
             EventTimeToSystemTime(pevlr->TimeWritten, &time);
@@ -665,7 +667,13 @@
             ListView_SetItemText(hwndListView, lviEventItem.iItem, 5, szEventID);
             ListView_SetItemText(hwndListView, lviEventItem.iItem, 6, szUsername); //User
             ListView_SetItemText(hwndListView, lviEventItem.iItem, 7, lpComputerName);
//Computer
-            ListView_SetItemText(hwndListView, lviEventItem.iItem, 8, lpData); //Event
Text
+            MultiByteToWideChar(CP_ACP,
+                                0,
+                                lpData,
+                                pevlr->DataLength,
+                                szData,
+                                MAX_PATH);
+            ListView_SetItemText(hwndListView, lviEventItem.iItem, 8, szData); //Event
Text
             dwRead -= pevlr->Length;
             pevlr = (EVENTLOGRECORD *)((LPBYTE) pevlr + pevlr->Length);
@@ -678,7 +686,15 @@
     // All events loaded
     EndDialog(hwndDlg, 0);
-    swprintf(szWindowTitle, L"%s - %s Log on \\\\%s", szTitle, lpLogName,
lpComputerName);
+
+    i = swprintf(szWindowTitle, L"%s - %s Log on \\\\", szTitle, lpLogName); /*
i = number of characters written */
+    /* lpComputerName can be NULL here if no records was read */
+    dwMaxLength = sizeof(szWindowTitle)/sizeof(WCHAR)-i;
+    if(!lpComputerName)
+        GetComputerNameW(szWindowTitle+i, &dwMaxLength);
+    else
+        _snwprintf(szWindowTitle+i, dwMaxLength, L"%s", lpComputerName);
+
     swprintf(szStatusText, L"%s has %d event(s)", lpLogName, dwTotalRecords);
     // Update the status bar