413 lines
12 KiB
C++
413 lines
12 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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DeleteSpecifiedFiles.cpp
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Abstract:
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This SHIM renames the MFC42loc.dll that is installed by the APP in the
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%windir%\system32 directory and sets up the temporary file for destruction.
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Notes:
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This app. places the MFC42loc.dll into the %windir%\system32 directory even on a English language
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locale thereby forcing some APPS to use it and thereby some 'Dialogs' and 'Message boxes' are messed up.
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History:
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08/21/2000 prashkud Created
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--*/
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#include "precomp.h"
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#include "CharVector.h"
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#include "strsafe.h"
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#include <new> // for inplace new
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IMPLEMENT_SHIM_BEGIN(DeleteSpecifiedFiles)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_END
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class FILENAME_PATH
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{
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public:
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CString FileName;
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CString FileVersion;
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BOOL bPresent;
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FILENAME_PATH()
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{
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bPresent = FALSE;
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}
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};
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class FileNamePathList : public VectorT<FILENAME_PATH>
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{
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};
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VectorT<FILENAME_PATH> *g_StFileNamePath = NULL;
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/*++
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This function checks the 'FileVersion' of the first variable 'szFileName'
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matches that of the 2nd parameter 'szFileVersion' and if it matches returns
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TRUE else returns FALSE.
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--*/
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BOOL
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FileCheckVersion(
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const CString & csFileName,
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const CString & csFileVersion
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)
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{
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DWORD dwDummy;
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PVOID pVersionInfo;
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UINT cbTranslate, i;
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WCHAR SubBlock[100];
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LPWSTR lpBuffer;
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DWORD dwBytes;
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WORD wLangID;
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struct LANGANDCODEPAGE
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{
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WORD wLanguage;
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WORD wCodePage;
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} *lpTranslate;
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DWORD dwVersionInfoSize;
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//
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// There is no File Version specified. So, no point in going ahead. Return TRUE.
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//
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if (csFileVersion.IsEmpty())
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{
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return TRUE;
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}
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dwVersionInfoSize = GetFileVersionInfoSizeW((LPWSTR)csFileName.Get(), &dwDummy);
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if (dwVersionInfoSize > 0)
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{
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pVersionInfo = malloc(dwVersionInfoSize);
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if (pVersionInfo)
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{
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if (0 != GetFileVersionInfoW(
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(LPWSTR)csFileName.Get(),
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0,
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dwVersionInfoSize,
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pVersionInfo
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))
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{
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// Now, pVersionInfo contains the required version block.
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// Use it with VerQueryValue to get the
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// the language info that is needed
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// Get System locale before and note down the language for the system
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// Read the list of languages and code pages.
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if (VerQueryValueW(
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pVersionInfo,
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L"\\VarFileInfo\\Translation",
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(LPVOID*)&lpTranslate,
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&cbTranslate
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))
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{
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//
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// Read the language string each language and code page.
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//
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for (i=0; i < (cbTranslate/sizeof(struct LANGANDCODEPAGE)); i++)
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{
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if (StringCbPrintfW(
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SubBlock,
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(sizeof(SubBlock) - 1),
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L"\\StringFileInfo\\%04x%04x\\FileVersion",
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lpTranslate[i].wLanguage,
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lpTranslate[i].wCodePage
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) < 0)
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{
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DPFN(
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eDbgLevelError,
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"Long string - Cannot handle");
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break;
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}
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else
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{
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SubBlock[ARRAYSIZE(SubBlock) - 1] = '\0';
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}
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//
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// Retrieve FileVersion for language and code page "i" from the pVersionInfo.
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//
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if (VerQueryValueW(
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pVersionInfo,
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SubBlock,
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(LPVOID*)&lpBuffer,
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(UINT*)&dwBytes))
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{
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if (!(csFileVersion.Compare(lpBuffer)))
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{
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DPFN(
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eDbgLevelInfo,
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"Version string for current file is %S,%S",
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lpBuffer, csFileVersion.Get());
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free(pVersionInfo);
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return TRUE;
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}
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}
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} // for loop
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}
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}
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free(pVersionInfo);
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}
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}
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return FALSE;
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}
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/*++
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This function as the name suggests deletes the file or if it is in use moves
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it to the 'Temp' folder.
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--*/
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VOID
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DeleteFiles()
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{
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for (int i = 0; i < g_StFileNamePath->Size(); ++i)
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{
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const FILENAME_PATH & fnp = g_StFileNamePath->Get(i);
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DPFN( eDbgLevelSpew, "DeleteFiles file(%S) version(%S)", fnp.FileName.Get(), fnp.FileVersion.Get());
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if (!fnp.bPresent)
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{
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//
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// CheckFileVersion
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//
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if (FileCheckVersion(fnp.FileName, fnp.FileVersion))
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{
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LOGN(eDbgLevelError,"Deleting file %S.", fnp.FileName.Get());
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// Delete the file..
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if (!DeleteFileW(fnp.FileName))
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{
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CString csTempDir;
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CString csTempPath;
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LOGN(eDbgLevelError,"Moving file %S.", fnp.FileName.Get());
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//
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// Could not delete.Retry by renaming it and then deleting it.
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// New file is %windir%\Temp
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//
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csTempDir.GetTempPathW();
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csTempPath.GetTempFileNameW(csTempDir, L"XXXX", 0);
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if (MoveFileExW( fnp.FileName, csTempPath, MOVEFILE_REPLACE_EXISTING ))
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{
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SetFileAttributesW(
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csTempPath,
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FILE_ATTRIBUTE_ARCHIVE |
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FILE_ATTRIBUTE_TEMPORARY);
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DeleteFileW(csTempPath);
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}
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}
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}
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}
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}
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}
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/*++
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This function checks for the existence of the file specified on the commandline .
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This is called during the DLL_PROCESS_ATTACH notification
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--*/
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BOOL
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CheckFileExistence()
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{
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// If any among the list is not present, mark it as 'Not Present' and only those marked as
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// 'Not present' will be deleted.
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BOOL bFileDoesNotExist = FALSE;
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WIN32_FIND_DATAW StWin32FileData;
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for (int i = 0; i < g_StFileNamePath->Size(); ++i)
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{
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FILENAME_PATH & fnp = g_StFileNamePath->Get(i);
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DPFN( eDbgLevelSpew, "CheckFileExistence file(%S) version(%S)", fnp.FileName.Get(), fnp.FileVersion.Get());
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HANDLE hTempFile = FindFirstFileW(fnp.FileName, &StWin32FileData);
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if (INVALID_HANDLE_VALUE != hTempFile)
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{
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FindClose(hTempFile);
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//
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// File is present. Check its version if given.
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//
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if (FileCheckVersion(fnp.FileName, fnp.FileVersion))
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{
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fnp.bPresent = TRUE;
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}
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else
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{
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bFileDoesNotExist = TRUE;
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fnp.bPresent = FALSE;
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}
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}
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else
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{
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bFileDoesNotExist = TRUE;
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fnp.bPresent = FALSE;
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}
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}
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return bFileDoesNotExist;
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}
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/*++
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The command line can contain FileName:Path:VersionString,FileName1:Path1:VersionString1 etc....
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Eg. Ole2.dll:system:604.5768.94567,MFC42.dll:0:,Foo.dll:d:\program Files\DisneyInteractive etc..
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'system' implies the %windir%. '0' implies that the filename itself is a fully qualified path
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OR one has the option of giving the path seperately OR it can be left blank.
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--*/
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BOOL
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ParseCommandLine(LPCSTR lpszCommandLine)
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{
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CSTRING_TRY
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{
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g_StFileNamePath = new VectorT<FILENAME_PATH>;
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if (!g_StFileNamePath)
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{
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return FALSE;
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}
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CStringToken csCommandLine(COMMAND_LINE, ":,;");
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CString csTok;
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CString csFilePart;
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DWORD dwState = 0;
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while (csCommandLine.GetToken(csTok))
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{
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FILENAME_PATH fnp;
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switch(dwState)
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{
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case 0:
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dwState++;
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fnp.FileName = csTok;
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break;
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case 1:
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// The file part needs to be stored.
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csFilePart = fnp.FileName;
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if (csTok.CompareNoCase(L"system") == 0)
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{
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fnp.FileName.GetSystemDirectoryW();
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fnp.FileName.AppendPath(csFilePart);
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}
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else
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{
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fnp.FileName = csTok;
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fnp.FileName.AppendPath(csFilePart);
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}
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dwState++;
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break;
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case 2:
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dwState = 0;
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fnp.FileVersion = csTok;
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DPFN( eDbgLevelInfo, "ParseCommandLine file(%S) version(%S)", fnp.FileName.Get(), fnp.FileVersion.Get());
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// Found all three states, add it to the list
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if (!g_StFileNamePath->AppendConstruct(fnp))
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{
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// Append failed, stop parsing
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return FALSE;
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}
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break;
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}
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}
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}
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CSTRING_CATCH
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{
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return FALSE;
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}
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return TRUE;
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason
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)
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{
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static BOOL fDidNotExist = FALSE;
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switch (fdwReason)
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{
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case SHIM_STATIC_DLLS_INITIALIZED:
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{
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if (ParseCommandLine(COMMAND_LINE))
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{
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//
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// Ok...CommandLine is in place...Now Check for those Files...
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// If any one file exists, then we are not responsible. We bail out..
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//
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fDidNotExist = CheckFileExistence();
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}
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break;
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}
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case DLL_PROCESS_DETACH:
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{
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//
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// Check for the specified file at the specified location. If it existed prior to
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// to this in PROCESS_DLL_ATTACH, it is not installed us...Just bail out !
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// If the file did not exist before, it is our problem and we should remove them.
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//
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if (fDidNotExist)
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{
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DeleteFiles();
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}
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break;
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}
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}
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return TRUE;
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}
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HOOK_BEGIN
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CALL_NOTIFY_FUNCTION
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HOOK_END
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IMPLEMENT_SHIM_END
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