Windows2003-3790/windows/appcompat/shims/layer/syncsystemandsystem32.cpp

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2001-01-01 00:00:00 +01:00
/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
SyncSystemAndSystem32.cpp
Abstract:
This shim takes a semi-colon delimited command line of filenames.
At process termination, the DLL will parse the extract each filename
from the command line and make sure that the file exists in both
the System directory and System32 (if it exists in either).
Some older apps expect certain DLLs to be in System when under NT they
belong in System32 (and vice versa).
History:
03/15/2000 markder Created
10/18/2000 a-larrsh Add Wild Card support for command line.
--*/
#include "precomp.h"
#include "CharVector.h"
IMPLEMENT_SHIM_BEGIN(SyncSystemAndSystem32)
#include "ShimHookMacro.h"
APIHOOK_ENUM_BEGIN
APIHOOK_ENUM_ENTRY(CreateFileA)
APIHOOK_ENUM_ENTRY(CreateFileW)
APIHOOK_ENUM_ENTRY(CloseHandle)
APIHOOK_ENUM_ENTRY(CopyFileA)
APIHOOK_ENUM_ENTRY(CopyFileW)
APIHOOK_ENUM_ENTRY(CopyFileExA)
APIHOOK_ENUM_ENTRY(CopyFileExW)
APIHOOK_ENUM_ENTRY(GetFileVersionInfoSizeA)
APIHOOK_ENUM_ENTRY(GetFileVersionInfoSizeW)
APIHOOK_ENUM_END
int g_nrgFilesToSync = 0;
CString * g_rgFilesToSync = NULL;
CString * g_csSystem = NULL; // c:\windows\system
CString * g_csSystem32 = NULL; // c:\windows\system32
//---------------------------------------------------------------------------------------
/*+
A vector of handles objects.
Access to this list must be inside a critical section.
--*/
class CachedHandleList : public VectorT<HANDLE>
{
private:
// Prevent copy
CachedHandleList(const CachedHandleList & );
CachedHandleList & operator = (const CachedHandleList & );
private:
static CachedHandleList * TheCachedHandleList;
CRITICAL_SECTION TheCachedHandleListLock;
inline CachedHandleList() {}
inline ~CachedHandleList();
static CachedHandleList * GetLocked();
inline void Lock();
inline void Unlock();
int FindHandleIndex(HANDLE handle) const;
public:
// All access to this class is through these static interfaces.
// The app has no direct access to the list, therefore cannot accidentally
// leave the list locked or unlocked.
// All operations are Atomic.
static BOOL Init();
static BOOL FindHandle(HANDLE handle);
static BOOL AddHandle(HANDLE handle);
static void RemoveHandle(HANDLE handle);
};
/*+
A static pointer to the one-and-only handle list.
--*/
CachedHandleList * CachedHandleList::TheCachedHandleList = NULL;
/*+
Init the class
--*/
inline BOOL CachedHandleList::Init()
{
TheCachedHandleList = new CachedHandleList;
if( TheCachedHandleList )
{
return InitializeCriticalSectionAndSpinCount(&TheCachedHandleList->TheCachedHandleListLock, 0x80000000);
}
return FALSE;
}
/*+
Clean up, releasing all resources.
--*/
inline CachedHandleList::~CachedHandleList()
{
DeleteCriticalSection(&TheCachedHandleListLock);
}
/*+
Enter the critical section
--*/
inline void CachedHandleList::Lock()
{
EnterCriticalSection(&TheCachedHandleListLock);
}
/*+
Unlock the list
--*/
inline void CachedHandleList::Unlock()
{
LeaveCriticalSection(&TheCachedHandleListLock);
}
/*+
Return a locked pointer to the list
--*/
CachedHandleList * CachedHandleList::GetLocked()
{
if (TheCachedHandleList)
TheCachedHandleList->Lock();
return TheCachedHandleList;
}
/*+
Search for the member in the list, return index or -1
--*/
int CachedHandleList::FindHandleIndex(HANDLE handle) const
{
for (int i = 0; i < Size(); ++i)
{
if (Get(i) == handle)
return i;
}
return -1;
}
BOOL CachedHandleList::FindHandle(HANDLE handle)
{
BOOL bRet = FALSE;
CachedHandleList * CachedHandleList = NULL;
CachedHandleList = CachedHandleList::GetLocked();
if (!CachedHandleList)
goto Exit;
bRet = CachedHandleList->FindHandleIndex(handle) != -1;
Exit:
if( CachedHandleList )
{
CachedHandleList->Unlock();
}
return bRet;
}
/*+
Add this handle to the global list.
--*/
BOOL CachedHandleList::AddHandle(HANDLE handle)
{
BOOL bRet = FALSE;
int index = -1;
CachedHandleList * CachedHandleList = NULL;
CachedHandleList = CachedHandleList::GetLocked();
if (!CachedHandleList)
{
goto Exit;
}
index = CachedHandleList->FindHandleIndex(handle);
if ( -1 == index )
{
bRet = CachedHandleList->Append(handle);
}
Exit:
// unlock the list
if(CachedHandleList)
{
CachedHandleList->Unlock();
}
return bRet;
}
/*+
Remove the handle from the global list
--*/
void CachedHandleList::RemoveHandle(HANDLE handle)
{
int index = -1;
CachedHandleList * CachedHandleList = NULL;
// Get a pointer to the locked list
CachedHandleList = CachedHandleList::GetLocked();
if (!CachedHandleList)
{
goto Exit;
}
// Look for our handle remove it.
index = CachedHandleList->FindHandleIndex(handle);
if (index >= 0)
{
CachedHandleList->Remove(index);
}
Exit:
// unlock the list
if( CachedHandleList )
{
CachedHandleList->Unlock();
}
}
void
SyncDir(const CString & csFileToSync, const CString & csSrc, const CString & csDest)
{
// Don't need our own excpetion handler,
// this routine is only called inside one already.
CString csSrcFile(csSrc);
csSrcFile.AppendPath(csFileToSync);
WIN32_FIND_DATAW FindFileData;
HANDLE hFind = FindFirstFileW(csSrcFile, &FindFileData);
if (hFind != INVALID_HANDLE_VALUE)
{
// csFileToSync might be a wildcard
do
{
CString csDestFile(csDest);
csDestFile.AppendPath(FindFileData.cFileName);
if (GetFileAttributesW(csDestFile) == INVALID_FILE_ATTRIBUTES)
{
// In System but not System32, copy it over
CopyFileW(csSrcFile, csDestFile, FALSE);
DPFN( eDbgLevelInfo, "File found in %S but not in %S: %S", csSrc.Get(), csDest.Get(), FindFileData.cFileName);
DPFN( eDbgLevelInfo, "Copied over");
}
}
while (FindNextFileW(hFind, &FindFileData));
FindClose(hFind);
}
}
void
SyncSystemAndSystem32(const CString & csFileToSync)
{
SyncDir(csFileToSync, *g_csSystem, *g_csSystem32);
SyncDir(csFileToSync, *g_csSystem32, *g_csSystem);
}
void
SyncAllFiles()
{
CSTRING_TRY
{
for (int nFileCount = 0; nFileCount < g_nrgFilesToSync; ++nFileCount)
{
SyncSystemAndSystem32(g_rgFilesToSync[nFileCount]);
}
}
CSTRING_CATCH
{
// Do nothing
}
}
BOOL
IsFileToSync(const CString & csFileName)
{
CSTRING_TRY
{
CString csFilePart;
csFileName.GetLastPathComponent(csFilePart);
for (int i = 0; i < g_nrgFilesToSync; ++i)
{
if (csFilePart == g_rgFilesToSync[i])
{
LOGN( eDbgLevelWarning, "File to sync detected: %S", csFileName.Get());
return TRUE;
}
}
}
CSTRING_CATCH
{
// Do nothing
}
return FALSE;
}
BOOL
IsFileToSync(LPCSTR szFileName)
{
CSTRING_TRY
{
CString csFileName(szFileName);
return IsFileToSync(csFileName);
}
CSTRING_CATCH
{
// Do nothing
}
return FALSE;
}
BOOL
IsFileToSync(LPCWSTR szFileName)
{
CSTRING_TRY
{
CString csFileName(szFileName);
return IsFileToSync(csFileName);
}
CSTRING_CATCH
{
// Do nothing
}
return FALSE;
}
HANDLE
APIHOOK(CreateFileA)(
LPCSTR lpFileName, // file name
DWORD dwDesiredAccess, // access mode
DWORD dwShareMode, // share mode
LPSECURITY_ATTRIBUTES lpSecurityAttributes, // SD
DWORD dwCreationDisposition, // how to create
DWORD dwFlagsAndAttributes, // file attributes
HANDLE hTemplateFile // handle to template file
)
{
HANDLE hRet;
hRet = ORIGINAL_API(CreateFileA)(
lpFileName,
dwDesiredAccess,
dwShareMode,
lpSecurityAttributes,
dwCreationDisposition,
dwFlagsAndAttributes,
hTemplateFile);
if (hRet != INVALID_HANDLE_VALUE)
{
if (IsFileToSync(lpFileName))
{
CachedHandleList::AddHandle(hRet);
}
}
return hRet;
}
HANDLE
APIHOOK(CreateFileW)(
LPCWSTR lpFileName, // file name
DWORD dwDesiredAccess, // access mode
DWORD dwShareMode, // share mode
LPSECURITY_ATTRIBUTES lpSecurityAttributes, // SD
DWORD dwCreationDisposition, // how to create
DWORD dwFlagsAndAttributes, // file attributes
HANDLE hTemplateFile // handle to template file
)
{
HANDLE hRet;
hRet = ORIGINAL_API(CreateFileW)(
lpFileName,
dwDesiredAccess,
dwShareMode,
lpSecurityAttributes,
dwCreationDisposition,
dwFlagsAndAttributes,
hTemplateFile);
if (hRet != INVALID_HANDLE_VALUE)
{
if (IsFileToSync(lpFileName))
{
CachedHandleList::AddHandle(hRet);
}
}
return hRet;
}
BOOL
APIHOOK(CloseHandle)(HANDLE hObject)
{
if (CachedHandleList::FindHandle(hObject))
{
CachedHandleList::RemoveHandle(hObject);
SyncAllFiles();
}
return ORIGINAL_API(CloseHandle)(hObject);
}
BOOL
APIHOOK(CopyFileA)(
LPCSTR lpExistingFileName, // name of an existing file
LPCSTR lpNewFileName, // name of new file
BOOL bFailIfExists // operation if file exists
)
{
BOOL bRet;
bRet = ORIGINAL_API(CopyFileA)(
lpExistingFileName,
lpNewFileName,
bFailIfExists);
if (bRet)
{
if (IsFileToSync(lpNewFileName))
{
SyncAllFiles();
}
}
return bRet;
}
BOOL
APIHOOK(CopyFileW)(
LPCWSTR lpExistingFileName, // name of an existing file
LPCWSTR lpNewFileName, // name of new file
BOOL bFailIfExists // operation if file exists
)
{
BOOL bRet;
bRet = ORIGINAL_API(CopyFileW)(
lpExistingFileName,
lpNewFileName,
bFailIfExists);
if (bRet)
{
if (IsFileToSync(lpNewFileName))
{
SyncAllFiles();
}
}
return bRet;
}
BOOL
APIHOOK(CopyFileExA)(
LPCSTR lpExistingFileName, // name of existing file
LPCSTR lpNewFileName, // name of new file
LPPROGRESS_ROUTINE lpProgressRoutine, // callback function
LPVOID lpData, // callback parameter
LPBOOL pbCancel, // cancel status
DWORD dwCopyFlags // copy options
)
{
BOOL bRet;
bRet = ORIGINAL_API(CopyFileExA)(
lpExistingFileName,
lpNewFileName,
lpProgressRoutine,
lpData,
pbCancel,
dwCopyFlags);
if (bRet)
{
if (IsFileToSync(lpNewFileName))
{
SyncAllFiles();
}
}
return bRet;
}
BOOL
APIHOOK(CopyFileExW)(
LPCWSTR lpExistingFileName, // name of existing file
LPCWSTR lpNewFileName, // name of new file
LPPROGRESS_ROUTINE lpProgressRoutine, // callback function
LPVOID lpData, // callback parameter
LPBOOL pbCancel, // cancel status
DWORD dwCopyFlags // copy options
)
{
BOOL bRet;
bRet = ORIGINAL_API(CopyFileExW)(
lpExistingFileName,
lpNewFileName,
lpProgressRoutine,
lpData,
pbCancel,
dwCopyFlags);
if (bRet)
{
if (IsFileToSync(lpNewFileName))
{
SyncAllFiles();
}
}
return bRet;
}
//
// GetFileVersionInfoSize was added for the Madeline series.
// There was a specific point at which the sync had to occur.
//
DWORD
APIHOOK(GetFileVersionInfoSizeA)(
LPSTR lptstrFilename, // file name
LPDWORD lpdwHandle // set to zero
)
{
if (IsFileToSync(lptstrFilename))
{
SyncAllFiles();
}
return ORIGINAL_API(GetFileVersionInfoSizeA)(lptstrFilename, lpdwHandle);
}
DWORD
APIHOOK(GetFileVersionInfoSizeW)(
LPWSTR lptstrFilename, // file name
LPDWORD lpdwHandle // set to zero
)
{
if (IsFileToSync(lptstrFilename))
{
SyncAllFiles();
}
return ORIGINAL_API(GetFileVersionInfoSizeW)(lptstrFilename, lpdwHandle);
}
BOOL
ParseCommandLine()
{
CSTRING_TRY
{
CString csCl(COMMAND_LINE);
CStringParser csParser(csCl, L";");
g_nrgFilesToSync = csParser.GetCount();
g_rgFilesToSync = csParser.ReleaseArgv();
// Create strings to %windir%\system and %windir%\system32
g_csSystem = new CString;
if( g_csSystem )
{
if( g_csSystem->GetWindowsDirectoryW() ) {
g_csSystem->AppendPath(L"System");
g_csSystem32 = new CString;
if( g_csSystem32 ) {
if( g_csSystem32->GetWindowsDirectoryW() ) {
g_csSystem32->AppendPath(L"System32");
return TRUE;
}
delete g_csSystem32;
}
}
delete g_csSystem;
}
}
CSTRING_CATCH
{
}
return FALSE;
}
/*++
Register hooked functions
--*/
BOOL
NOTIFY_FUNCTION(
DWORD fdwReason
)
{
if (fdwReason == DLL_PROCESS_ATTACH)
{
if( !CachedHandleList::Init() || !ParseCommandLine() )
{
return FALSE;
}
}
else if (fdwReason == SHIM_STATIC_DLLS_INITIALIZED)
{
SyncAllFiles();
}
else if (fdwReason == DLL_PROCESS_DETACH)
{
SyncAllFiles();
}
return TRUE;
}
HOOK_BEGIN
CALL_NOTIFY_FUNCTION
APIHOOK_ENTRY(KERNEL32.DLL, CreateFileA);
APIHOOK_ENTRY(KERNEL32.DLL, CreateFileW);
APIHOOK_ENTRY(KERNEL32.DLL, CloseHandle);
APIHOOK_ENTRY(KERNEL32.DLL, CopyFileA);
APIHOOK_ENTRY(KERNEL32.DLL, CopyFileW);
APIHOOK_ENTRY(KERNEL32.DLL, CopyFileExA);
APIHOOK_ENTRY(KERNEL32.DLL, CopyFileExW);
APIHOOK_ENTRY(VERSION.DLL, GetFileVersionInfoSizeA);
APIHOOK_ENTRY(VERSION.DLL, GetFileVersionInfoSizeW);
HOOK_END
IMPLEMENT_SHIM_END