C++ TFsPluginRequest::IsPostOperation方法代码示例

/**
@internalComponent
*/
TInt CTestHexHook::DoRequestL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNotSupported;

	TInt function = aRequest.Function();
	
	iDrvNumber = aRequest.DriveNumber();

	switch(function)
		{
		case EFsFileOpen:
			err = HexFileOpen(aRequest);
			break;

		case EFsFileRead:
			// Post intercept does nothing except prove that it is possible and that no deadlock occurs.
			// plugin always calls FileRead() when receiving a EFsFileRead, and so the mesage gets completed
			// by the plugin and has to be post intercepted by the plugin (if registered to post-intercept the request) 
			// and any plugins above it.

			if (!(aRequest.IsPostOperation()))
				err = HexFileRead(aRequest);
			break;

		default:
			break;
		}

	return err;
	}

void CPreModifierPlugin::FsReadFileSectionL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNone;
	TInt length = 0;
	TInt64 pos = 0;
	TFileName filename;
	TParse parse;
	TBuf<256> testfilename1;

	//setting up test files
	testfilename1.Append(iDriveToTest);
	testfilename1.Append(_L(":\\Data\\test.txt"));

	filename = aRequest.Src().FullName();

	err = aRequest.Read(TFsPluginRequest::ELength, length);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL
	
	err = aRequest.Read(TFsPluginRequest::EPosition, pos);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

    parse.Set(filename, NULL, NULL);

	_LOG2(_L("CPreModifierPlugin::FsReadFileSectionL, file: %S"), &filename);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsReadFileSectionL, post intercept - enter"));
		RFilePlugin fileplugin2(aRequest,ETrue);
		//open a second file
		err = fileplugin2.Open(testfilename1, EFileWrite);
		_LOG3(_L("CPreModifierPlugin::FsReadFileSectionL - RFilePlugin::Open for %S returned %d"), &testfilename1, err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
								
		TInt64 size=0;
		err = fileplugin2.Size(size);
		_LOG3(_L("CPreModifierPlugin::FsReadFileSectionL - RFilePlugin::Size for %S returned %d"), &testfilename1, err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL

		//close the second file
		fileplugin2.Close();
		_LOG(_L("CPreModifierPlugin::FsReadFileSectionL - post intercept - exit"));
		}
	else
		{
			User::Invariant();
		}
	}

/**
Handle requests to Dismount the plugin only.
This plugin is designed such that its removal is not allowed.
@internalComponent
*/
TInt CUnremovablePlugin::DoRequestL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNone;

	TInt function = aRequest.Function();

	if (aRequest.IsPostOperation())
		{
		_LOG2(_L("CUnremovablePlugin post intercept for function %d"), function);
		//We should never get here
		//Is it even correct to post-intercept a EFsDismountPlugin ??
		User::Invariant();
		}
	else
		{
		_LOG2(_L("CUnremovablePlugin pre intercept for function %d"), function);

		//If a user is trying to dismount this plugin and this plugin doesn't want
		//to be dismounted then we should eb able to intecept this and return KErrAccessDenied or some
		//appropriate error code.

		if(iRemovable)
			{
			return KErrNone;
			}
		else
			{
			return KErrPermissionDenied;	
			}
		
		}

	return err;
	}

void CPreModifierPlugin::FsFileTempL(TFsPluginRequest& aRequest)
	{
	TBuf<256> testfilename1;

	//setting up test files
	testfilename1.Append(iDriveToTest);
	testfilename1.Append(_L(":\\Data\\"));

	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileTempL, post intercept"));

		RFilePlugin fileplugin(aRequest);
		TInt err = fileplugin.AdoptFromClient();
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
		
		//write to the newly created temp file
		TBuf8<64> wbuffer;
		wbuffer.Copy(_L8("TestTestTest"));
		err = fileplugin.Write(0, wbuffer);
		_LOG2(_L("CPreModifierPlugin::FsFileTempL, RFilePlugin::Write to the newly created temp file returned %d"), err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL

		TInt length = wbuffer.Length();
		HBufC8* tempBuf = HBufC8::NewMaxLC(length);
		TPtr8 tempBufPtr((TUint8 *)tempBuf->Des().Ptr(), length, length);
		err = fileplugin.Read(0, tempBufPtr);
		_LOG2(_L("CPreModifierPlugin::FsFileTempL, RFilePlugin::Read returned %d"), err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
		
		fileplugin.Close();

		//testing the correct thing has been written to the drive
		err = wbuffer.Compare(tempBufPtr);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
			
		CleanupStack::PopAndDestroy();
		}
	else
		{
		User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsDirReadPackedL(TFsPluginRequest& aRequest)
	{
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsDirReadPackedL, post intercept"));
		}
	else
		{
		User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileSubCloseL(TFsPluginRequest& aRequest)
	{
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileSubCloseL, post intercept"));
		}
	else
		{
		User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileWriteL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNone;
	TInt length = 0;
	TInt64 pos = 0;
	TFileName filename;
	TParse parse;

	TBuf<256> testfilename1;
	TBuf<256> testfilename2;

	//setting up test files
	testfilename1.Append(iDriveToTest);
	testfilename1.Append(_L(":\\Data\\test.txt"));

	testfilename2.Append(iDriveToTest);
	testfilename2.Append(_L(":\\Data\\createcreate3.txt"));

	err = aRequest.FileName(filename);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

	err = aRequest.Read(TFsPluginRequest::ELength, length);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL
	
	err = aRequest.Read(TFsPluginRequest::EPosition, pos);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

    parse.Set(filename, NULL, NULL);

	_LOG4(_L("CPreModifierPlugin::FsFileWriteL, file: %S, pos: %d, length: %d"), &filename, pos, length);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileWriteL, post intercept"));
		}
	else
		{
			User::Invariant();
		}
	}

/**
Handle requests
@internalComponent
*/
TInt CTemplatePlugin::DoRequestL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNone;

	TInt function = aRequest.Function();

	if (aRequest.IsPostOperation())
		{
		_LOG2(_L("CTemplatePlugin post intercept for function %d"), function);
		}
	else
		{
		_LOG2(_L("CTemplatePlugin pre intercept for function %d"), function);
		}

	return err;
	}

void CPreModifierPlugin::FsDirReadOneL(TFsPluginRequest& aRequest)
	{

	TFileName name;
	TInt err = aRequest.FileName(name);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsDirReadOneL, post intercept"));
		}
	else
		{
		User::Invariant();
		}
	}

void CPreModifierPlugin::FsRenameL(TFsPluginRequest& aRequest)
	{
	TInt err = KErrNone;
	TFileName oldfilename;
	TFileName newfilename;

	oldfilename = aRequest.Src().FullName();
	newfilename = aRequest.Dest().FullName();

	TBuf<256> testfilename1;

	//setting up test files
	testfilename1.Append(iDriveToTest);
	testfilename1.Append(_L(":\\Data\\test.txt"));

	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsRenameL, post intercept"));
		RFilePlugin fileplugin2(aRequest);
		//open a second file
		err = fileplugin2.Open(testfilename1, EFileWrite);
		_LOG3(_L("CPreModifierPlugin::FsRenameL, RFilePlugin::Open for %S returned %d"), &testfilename1, err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
								
		TInt64 size=0;
		err = fileplugin2.Size(size);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL		

		//close the second file
		fileplugin2.Close();
		_LOG2(_L("CPreModifierPlugin::FsRenameL, RFilePlugin::Close to the second file returned %d"), err);
		}
	else
		{
		User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileRenameL(TFsPluginRequest& aRequest)
	{
	TFileName oldfilename, newfilename;
	TParse parse;

	oldfilename = aRequest.Src().FullName();
	newfilename = aRequest.Dest().FullName();
	
    parse.Set(oldfilename, NULL, NULL);
	TPtrC extension(parse.Ext());

	_LOG3(_L("CPreModifierPlugin::FsFileRenameL, old name: %S, new name: %S"), &oldfilename, &newfilename);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileRenameL, post intercept"));

		if (extension.CompareF(_L(".tst")) == 0)
			{
			TBuf8<32> tempBuf = (_L8("Rename Post Intercept"));
			RFilePlugin fileplugin(aRequest);
			TInt err = fileplugin.AdoptFromClient();
			iLastError = err;
			iLineNumber = __LINE__;
			if(err!=KErrNone)
				User::Leave(err); //trapped in DoRequestL

			err = fileplugin.Write(20, tempBuf);
			_LOG2(_L("CPreModifierPlugin::FsFileRenameL, FileWrite returned %d"), err);
			iLastError = err;
			iLineNumber = __LINE__;
			if(err!=KErrNone)
				User::Leave(err); //trapped in DoRequestL
			fileplugin.Close();
			}
		}
	else
		{
			User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileUnLockL(TFsPluginRequest& aRequest)
	{
	TInt length = 0;
	TInt64 pos = 0;
	TFileName filename;
	TParse parse;

	TInt err = aRequest.FileName(filename);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

	err = aRequest.Read(TFsPluginRequest::ELength, length);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

	err = aRequest.Read(TFsPluginRequest::EPosition, pos);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL
	
    parse.Set(filename, NULL, NULL);
	//TPtrC extension(parse.Ext());

	_LOG4(_L("CPreModifierPlugin::FsFileUnLockL, file: %S, pos: %d, length: %d"), &filename, pos, length);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileUnLockL, post intercept"));
		}
	else
		{
			User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileSetSizeL(TFsPluginRequest& aRequest)
	{
	TFileName filename;
	TParse parse;

	TInt err = aRequest.FileName(filename);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

    parse.Set(filename, NULL, NULL);

	_LOG2(_L("CPreModifierPlugin::FsFileSetSizeL, file: %S"), &filename);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileSetSizeL, post intercept"));
		}
	else
		{
			User::Invariant();
		}
	}

/**
@internalComponent
*/
void CPreModifierPlugin::FsFileLockL(TFsPluginRequest& aRequest)
	{
	TInt length = 0;
	TInt64 pos = 0;
	TFileName filename;
	TParse parse;
	
	TInt err = aRequest.FileName(filename);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

	err = aRequest.Read(TFsPluginRequest::ELength, length);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

	err = aRequest.Read(TFsPluginRequest::EPosition, pos);
	iLastError = err;
	iLineNumber = __LINE__;
	if(err!=KErrNone)
		User::Leave(err); //trapped in DoRequestL

    parse.Set(filename, NULL, NULL);
	TPtrC extension(parse.Ext());

	_LOG4(_L("CPreModifierPlugin::FsFileLockL, file: %S, pos: %d, length: %d"), &filename, pos, length);
	
	if (aRequest.IsPostOperation())
		{
		_LOG(_L("CPreModifierPlugin::FsFileLockL, post intercept"));

		// Request read from post interception
		if (extension.CompareF(_L(".lockread")) == 0)
			{
			length = 10;
			HBufC8* tempBuf = HBufC8::NewMaxLC(length);
			TPtr8 tempBufPtr((TUint8 *)tempBuf->Des().Ptr(), length, length);		
			_LOG(_L("CPreModifierPlugin::FsFileLockL , calling AdoptFromClient in post intercept"));
			RFilePlugin fileplugin(aRequest);
			TInt err = fileplugin.AdoptFromClient();
			iLastError = err;
			iLineNumber = __LINE__;
			if(err!=KErrNone)
				User::Leave(err); //trapped in DoRequestL
			
			_LOG2(_L("CPreModifierPlugin::FsFileLockL, Adopt returned %d"), err);
			
			err = fileplugin.Read(pos, tempBufPtr, length); 
			_LOG2(_L("CPreModifierPlugin::FsFileLockL, FileRead returned %d"), err);
			iLastError = err;
			iLineNumber = __LINE__;
			if(err!=KErrNone)
				User::Leave(err); //trapped in DoRequestL
			fileplugin.Close();
			CleanupStack::PopAndDestroy();						          
			}

		// Request close from post interception
		if(extension.CompareF(_L(".lockclose")) == 0)
			{		
			_LOG(_L("CPreModifierPlugin::FsFileLockL, file = *.lockclose post intercept "));
			RFilePlugin fileplugin(aRequest);
		    TInt err = fileplugin.AdoptFromClient();
			_LOG2(_L("CPreModifierPlugin::FsFileLockL ,Open %d"), err);
			iLastError = err;
			iLineNumber = __LINE__;
			if(err!=KErrNone)
				User::Leave(err); //trapped in DoRequestL		
			fileplugin.Close();			
			_LOG(_L("CPreModifierPlugin::FsFileLockL, Close"));
			}

		}
	else
		{
			User::Invariant();
		}
	}

void CPreModifierPlugin::FsReplaceL(TFsPluginRequest& aRequest)
	{
	TFileName oldfilename;
	TFileName newfilename;

	oldfilename = aRequest.Src().FullName();
	newfilename = aRequest.Dest().FullName();

	TBuf<256> testfilename1;

	//setting up test files
	testfilename1.Append(iDriveToTest);
	testfilename1.Append(_L(":\\Data\\test.txt"));

    	
	if (aRequest.IsPostOperation())
		{
		//STF: Is this code going to get called - the pre-operation completes early?

		_LOG(_L("CPreModifierPlugin::FsReplaceL, post intercept"));
		//We should check that the name has changed here.
		RFilePlugin file(aRequest);
		TInt err = file.AdoptFromClient();
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL

		TInt compare = oldfilename.Compare(newfilename);
		if(compare != 0) //is equal
			{
			//User::Leave(compare);
			//It wont be equal as the name is coming from the request aint it.
			//Pointless comparison then eh?
			}

		file.Close();

		RFilePlugin fileplugin2(aRequest);
		//open a second file
		err = fileplugin2.Open(testfilename1, EFileWrite);
		_LOG3(_L("CPreModifierPlugin::FsReplaceL, RFilePlugin::Open for %S returned %d"), &testfilename1, err);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL
								
		TInt64 size=0;
		err =fileplugin2.Size(size);
		iLastError = err;
		iLineNumber = __LINE__;
		if(err!=KErrNone)
			User::Leave(err); //trapped in DoRequestL

		//close the second file
		fileplugin2.Close();
		_LOG2(_L("CPreModifierPlugin::FsReplaceL, RFilePlugin::Close to the second file returned %d"), err);
		}
	else
		{
		User::Invariant();
		}
	}