// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// f32test\demandpaging\t_clamp.cpp

// Test suite for file clamping, file clamping is used to prevent files

// (exes or dlls) from being deleted whilst in use.

// 002 GetDriveLetters()

// 003 Test1() Basic clamp operation

// 004 Test2() Invalid clamp requests

// 005 Test3() Denied FS requests when file(s) are clamped

// 006 Test3Operations() Test other RFile, RFs operations

// 007 Test3Operations() Increase number of clamps to MY_N

// 008 Test3Operations() Decrease number of clamps by MY_M

// 009 Test3Operations() Increase number of clamps by MY_M

// 010 TestDeferredDismount() Open and clamp file, register for dismount 

// notification, then issue dismount instruction.

// 011 Test4() Clamp tests for non-writable file system

// 012 Test5() Clamp requests on non-clamping file systems

// 

//

//! @SYMTestCaseID			KBASE-T_CLAMP-0328

//! @SYMTestType			UT

//! @SYMPREQ				PREQ1110

//! @SYMTestCaseDesc		Demand Paging File Clamp tests

//! @SYMTestActions			001 Starting T_CLAMP

//! @SYMTestExpectedResults All tests should pass.

//! @SYMTestPriority        High

//! @SYMTestStatus          Implemented

#define __E32TEST_EXTENSION__

#include <e32test.h>

RTest test(_L("T_CLAMP"));

#if defined(_DEBUG) || defined(_DEBUG_RELEASE)

#include <f32file.h>

#include <f32dbg.h>

#include <e32ldr_private.h>

RFs TheFs;

_LIT(KFATName,"FAT");

//_LIT(KFAT32Name,"FAT32");

_LIT(KROFSName,"ROFS");

_LIT(KLFFSName,"LFFS");

_LIT(KCOMPName,"COMPOSITE"); // Z: name if Composite File System

//#ifdef __WINS__

//_LIT(KROMName,"WIN32");	// Clamping is not supported for non-composite filing system on Z:

//#else

_LIT(KROMName,"ROM");		 // Z: name if ROMFS (on hardware, not emulator)

//#endif

TChar NandFatDrv='?';

TChar RofsDrv='?';

TChar LffsDrv='?';

TChar CompDrv='?';

LOCAL_C void Test1()

	{

// Basic clamp operation

	test.Next(_L("T_Clamp - Test1()"));

	TBuf<256> fileName;	

	TBuf<256> buf(_L("buffer for file used"));

	fileName = _L("clampFile.tst");

	RFile testFile;

	TInt r=testFile.Replace(TheFs,fileName,EFileWrite);

	test(r==KErrNone);

	TPtrC8 pBuf((TUint8*)&buf);

	testFile.Write(pBuf);

	testFile.Flush();

	// Clamp file

	RFileClamp handle;

	r=handle.Clamp(testFile);

	test(r==KErrNone);

	TInt64 storedCookie_0=handle.iCookie[0];

	TInt64 storedCookie_1=handle.iCookie[1];

	// Try to clamp previously-clamped file

	RFileClamp handle1;

	r=handle1.Clamp(testFile);

	test(r==KErrNone);

	// Unclamp file

	r=handle.Close(TheFs);

	test (r==KErrNone);

	// Check cookie content has been re-initialised

	test((0==handle.iCookie[0])&&(0==handle.iCookie[1]));

	// Try to unclamp a file that is not clamped

	handle.iCookie[0]=storedCookie_0;

	handle.iCookie[1]=storedCookie_1;

	r=handle.Close(TheFs);

	test (r==KErrNotFound);

	// Check that attempting to unclamp with a zero-content cookie

	// yields no error

	handle.iCookie[0]=0;

	handle.iCookie[1]=0;

	r=handle.Close(TheFs);

	test (r==KErrNone);

	// Clamp the file (again)

	r=handle.Clamp(testFile);

	test(r==KErrNone);

	// Create and clamp a second file ...

	fileName = _L("clampFile2.tst");

	RFile testFile2;

	r=testFile2.Replace(TheFs,fileName,EFileWrite);

	test(r==KErrNone);

	buf=_L("buffer for file 2");

	testFile2.Write(pBuf);

	testFile2.Flush();

	RFileClamp handle2;

	r=handle2.Clamp(testFile2);

	test(r==KErrNone);

	// Create and clamp a third file ...

	RFileClamp handle3;

	fileName = _L("clampFile3.tst");

	RFile testFile3;

	r=testFile3.Replace(TheFs,fileName,EFileWrite);

	test(r==KErrNone);

	buf=_L("buffer for file 3");

	testFile3.Write(pBuf);

	testFile3.Flush();

	r=handle3.Clamp(testFile3);

	test(r==KErrNone);

	// Test can unclamp then reclamp first file

	// then repeat for the third file

	r=handle.Close(TheFs);

	test (r==KErrNone);

	r=handle.Clamp(testFile);

	test(r==KErrNone);

	r=handle3.Close(TheFs);

	test (r==KErrNone);

	r=handle3.Clamp(testFile3);

	test(r==KErrNone);

	// Tidy up

	r=handle.Close(TheFs);

	test (r==KErrNone);

	r=handle1.Close(TheFs);

	test (r==KErrNone);

	testFile.Close();

	r=TheFs.Delete(_L("clampFile.tst"));

	test (r==KErrNone);

	r=handle2.Close(TheFs);

	test (r==KErrNone);

	testFile2.Close();

	r=TheFs.Delete(_L("clampFile2.tst"));

	test (r==KErrNone);

	r=handle3.Close(TheFs);

	test (r==KErrNone);

	testFile3.Close();

	r=TheFs.Delete(_L("clampFile3.tst"));

	test (r==KErrNone);

	}

LOCAL_C void Test2()

	{

// Invalid clamp requests

	test.Next(_L("T_Clamp - Test2()"));

	// Test attempt to clamp empty file is rejected

	RFileClamp handle4;

	TBuf<256> file4Name;	

	file4Name = _L("clampFile4.tst");

	RFile testFile4;

	TInt r=testFile4.Replace(TheFs,file4Name,EFileWrite);

	test(r==KErrNone);

	r=handle4.Clamp(testFile4);

	test(r==KErrEof);

	// Preparation for next test - create a valid clamp handle

	TBuf<256> buf4(_L("buffer for file 4"));

	TPtrC8 pBuf4((TUint8*)&buf4);

	testFile4.Write(pBuf4);

	testFile4.Flush();

	r=handle4.Clamp(testFile4);

	test(r==KErrNone);

	// Try to unclamp non-existant file

	RFileClamp handle5;

	memcpy((TAny*)&handle5,(TAny*)&handle4,sizeof(RFileClamp));

	handle5.iCookie[0] = MAKE_TINT64(-1,-1); // iCookie[0] holds the unique ID

	r=handle5.Close(TheFs);

	test (r==KErrNotFound);

	// Tidy up

	r=handle4.Close(TheFs);

	test (r==KErrNone);

	testFile4.Close();

	r=TheFs.Delete(_L("clampFile4.tst"));

	test (r==KErrNone);

	}

LOCAL_C void TestDeferredDismount(TDesC& aRoot, TDesC& aFileName, RFileClamp* handlePtr)

	{

	// Open and clamp file, register for dismount notification, then issue 

	// dismount instruction.

	// Since there are no other clients registered for dismount notification,

	// this would normally lead too dismount being instigated. However, since

	// the file is clamped, dismount should be deferred

	test.Next(_L("T_Clamp - TestDeferredDismount()"));

	// File system details required for clean-up

	const TInt KMaxFileSystemNameLength=100; // Arbitrary length

	const TInt KMaxFileSystemExtNameLength=100; // Arbitrary length

	TBuf<KMaxFileSystemNameLength> fsName;

	TBuf<KMaxFileSystemExtNameLength> fsExtName_0;

	TBuf<KMaxFileSystemExtNameLength> fsExtName_1;

	TBool fsExt0Present=EFalse;

	TBool fsExt1Present=EFalse;

	TInt driveNo, r;

	r=TheFs.CharToDrive(aRoot[0], driveNo);

	test(r==KErrNone);

	r=TheFs.FileSystemName(fsName, driveNo);

	test(r==KErrNone);

	r=TheFs.ExtensionName(fsExtName_0,driveNo,0);

	if(r==KErrNone)

		fsExt0Present=ETrue;

	r=TheFs.ExtensionName(fsExtName_1,driveNo,1);

	if(r==KErrNone)

		fsExt1Present=ETrue;

	// Create a file & write to it so that we can test whether dismounting works correctly with dirty data

	TDriveInfo driveInfo;

	test(TheFs.Drive(driveInfo, driveNo) == KErrNone);

	TFileName dirtyFileName(_L("dirtyFile.tst"));

	RFile dirtyFile;

	if (!(driveInfo.iMediaAtt & KMediaAttWriteProtected))

		{

		r=dirtyFile.Replace(TheFs, dirtyFileName, EFileWrite);

		test(r==KErrNone);

		r=dirtyFile.Write(_L8("My name is Michael Caine"));

		test(r==KErrNone);

		}

	RFile testFile;

	r=testFile.Open(TheFs,aFileName,EFileRead);

	test(r==KErrNone);

	r=handlePtr->Clamp(testFile);

	test(r==KErrNone);

	testFile.Close();

	TRequestStatus clientNotify=KErrNone;

	TRequestStatus clientDismount=KErrNone;

	TheFs.NotifyDismount(driveNo, clientNotify); // Register for notification

	test(clientNotify == KRequestPending);

	TheFs.NotifyDismount(driveNo, clientDismount, EFsDismountNotifyClients);

	test(clientDismount == KRequestPending);

	User::WaitForRequest(clientNotify);

	test(clientNotify == KErrNone);

	r=TheFs.AllowDismount(driveNo);	// Respond to dismount notification

	test(r == KErrNone);

	test(clientDismount == KRequestPending); // Dismount is deferred

	//

	// Now unclamp the file, and check that the deferred dismount is performed.

	r=handlePtr->Close(TheFs);

	test(r==KErrNone);

	User::WaitForRequest(clientDismount);

	test(clientDismount == KErrNone);	

	// Try to write to the opened file: this should return KErrNotReady as there is no drive thread

	if (!(driveInfo.iMediaAtt & KMediaAttWriteProtected))

		{

		r=dirtyFile.Write(_L8("My name isn't really Michael Caine"));

		test(r==KErrNotReady);

		}

	// Re-mount the file system

	if(fsExt0Present)

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_0,driveNo);

		test(r==KErrNone);

		}

	else if(fsExt1Present) // untested !

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_1,driveNo);

		test(r==KErrNone);

		}

	else 

		{

		r=TheFs.MountFileSystem(fsName,driveNo);

		test_KErrNone(r);

		}

	// create some more dirty data to verify that the file server can cope with the drive thread 

	// having gone & come back again

	if (!(driveInfo.iMediaAtt & KMediaAttWriteProtected))

		{

		r=dirtyFile.Write(_L8("My name is Michael Phelps and I'm a fish."));

		test(r==KErrDisMounted);

		dirtyFile.Close();

		r = TheFs.Delete(dirtyFileName);

		test(r == KErrNone);

		}

	// Issue a EFsDismountNotifyClients with no clients but with files clamped

	// & verify that the dismount request completes when clamps are removed

	r=testFile.Open(TheFs,aFileName,EFileRead);

	test(r==KErrNone);

	r=handlePtr->Clamp(testFile);

	test(r==KErrNone);

	testFile.Close();

	TheFs.NotifyDismount(driveNo, clientDismount, EFsDismountNotifyClients);

	test(clientDismount == KRequestPending);

	r=handlePtr->Close(TheFs);

	test(r==KErrNone);

	User::WaitForRequest(clientDismount);

	test(clientDismount == KErrNone);	

	// Re-mount the file system again

	if(fsExt0Present)

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_0,driveNo);

		test(r==KErrNone);

		}

	else if(fsExt1Present) // untested !

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_1,driveNo);

		test(r==KErrNone);

		}

	else 

		{

		r=TheFs.MountFileSystem(fsName,driveNo);

		test_KErrNone(r);

		}

	// Issue a EFsDismountForceDismount with no clients but with files clamped

	// & verify that the dismount request completes when clamps are removed

	r=testFile.Open(TheFs,aFileName,EFileRead);

	test(r==KErrNone);

	r=handlePtr->Clamp(testFile);

	test(r==KErrNone);

	testFile.Close();

	TheFs.NotifyDismount(driveNo, clientDismount, EFsDismountForceDismount);

	test(clientDismount == KRequestPending);

	r=handlePtr->Close(TheFs);

	test(r==KErrNone);

	User::WaitForRequest(clientDismount);

	test(clientDismount == KErrNone);	

	// Re-mount the file system again

	if(fsExt0Present)

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_0,driveNo);

		test(r==KErrNone);

		}

	else if(fsExt1Present) // untested !

		{

		r=TheFs.MountFileSystem(fsName,fsExtName_1,driveNo);

		test(r==KErrNone);

		}

	else 

		{

		r=TheFs.MountFileSystem(fsName,driveNo);

		test_KErrNone(r);

		}

	}

LOCAL_C void Test3Operations(TDesC& aRoot, TDesC& aFileName)

	{

	test.Next(_L("T_Clamp - Test3Operations()"));

	// RFormat::Open

#ifdef __WINS__

	if (User::UpperCase(aRoot[0]) != 'C')

#endif

		{

		TBuf<4> driveBuf=_L("?:\\");

		driveBuf[0] = aRoot[0];

		RFormat format;

		TInt count;

		TInt r=format.Open(TheFs,driveBuf,EFullFormat,count);

		test(r==KErrInUse);

		format.Close();

		}

	// Dismount: synchronous requests

	// RFs::DismountFileSystem, RFs::SwapFileSystem

	const TInt KMaxFileSystemNameLength=100; // Arbitrary length

	TBuf<KMaxFileSystemNameLength> fileSysName;

	TInt driveNo, r;

	r=TheFs.CharToDrive(aRoot[0], driveNo);

	test(r==KErrNone);

	r=TheFs.FileSystemName(fileSysName,driveNo);

	test(r==KErrNone);

	r=TheFs.DismountFileSystem(fileSysName,driveNo);

	test(r==KErrInUse);

	r=TheFs.SwapFileSystem(fileSysName,fileSysName,driveNo);

	test(r==KErrInUse);

#if defined(_DEBUG) || defined(_DEBUG_RELEASE)

	// The cancellation of deferred dismounts requires controlIO 

	// functionality available in debug versions of the code.

	// Dismount: asynchronous requests

	// RFs::NotifyDismount, RFs::AllowDismount

	const TInt KNumClients = 5;

    RFs clientFs[KNumClients];

	TRequestStatus clientNotify[KNumClients];

	TRequestStatus clientComplete;

	TInt i=0;

	for(i=0; i< KNumClients; i++)

		{

   		r=clientFs[i].Connect();

		test(r==KErrNone);

		}

	// Cancel any deferred dismount in preparation for the next test

	r=TheFs.ControlIo(driveNo,KControlIoCancelDeferredDismount);

	test(r==KErrNone);	

	// Use case 1: Orderly dismount

	// All clients register for dismount notification

	for(i=0; i< KNumClients; i++)

		{

		clientNotify[i] = KErrNone;

   		clientFs[i].NotifyDismount(driveNo, clientNotify[i]);

		test(clientNotify[i] == KRequestPending);

		}

	// First client notifies intent to dismount

	clientComplete = KErrNone;

   	clientFs[0].NotifyDismount(driveNo, clientComplete, EFsDismountNotifyClients);

	test(clientComplete == KRequestPending);

	// Check all clients have received the notification

	for(i=0; i< KNumClients; i++)

		{

		test(clientNotify[i] == KErrNone);

		}

	// All clients invoke AllowDismount

	for(i=0; i< KNumClients; i++)

		{

		r=clientFs[i].AllowDismount(driveNo);

		test(r==KErrNone);

		}

	// Dismount is deferred

	test(clientComplete == KRequestPending);

	// Cancel the deferred dismount in preparation for the next test

	clientFs[0].NotifyDismountCancel(clientComplete);

	test(clientComplete == KErrCancel);

	r=TheFs.ControlIo(driveNo,KControlIoCancelDeferredDismount);

	test(r==KErrNone);	

	clientComplete=KErrNone; // Re-initialise the TRequestStatus

	// Use case 2: Forced dismount

	// All clients register for dismount notification

	for(i=0; i< KNumClients; i++)

		{

   		clientFs[i].NotifyDismount(driveNo, clientNotify[i]);

		test(clientNotify[i] == KRequestPending);

		}

	// First client notifies intent to dismount

   	clientFs[0].NotifyDismount(driveNo, clientComplete, EFsDismountNotifyClients);

	test(clientComplete == KRequestPending);

	// Check all clients have received the notification

	for(i=0; i< KNumClients; i++)

		{

		test(clientNotify[i] == KErrNone);

		}

	// Not all other clients invoke AllowDismount

	for(i=0; i< KNumClients-1; i++)

		{

		clientFs[i].AllowDismount(driveNo);

		}

	// First client attempts forced dismount

	test(clientComplete == KRequestPending);

   	clientFs[0].NotifyDismount(driveNo, clientComplete, EFsDismountForceDismount);

	// Dismount is deferred

	test(clientComplete == KRequestPending);

	// Cancel the deferred dismount in preparation for the next test

	// Also cancel the 'un-Allowed' notification request

	clientFs[0].NotifyDismountCancel(clientComplete);

	test(clientComplete == KErrCancel);

	r=TheFs.ControlIo(driveNo,KControlIoCancelDeferredDismount);

	test(r==KErrNone);	

	clientComplete=KErrNone; // Re-initialise the TRequestStatus

#endif

	// RFile::Open with EFileWrite

	RFile testFile;

	r=testFile.Open(TheFs,aFileName,EFileWrite|EFileShareReadersOrWriters);

	test(r==KErrInUse);

	// RFile::Replace

	RFile testFile2;

	r=testFile2.Replace(TheFs,aFileName,EFileRead);

	test(r==KErrInUse);

	testFile2.Close();

	// RFile::Set - this should not be prevented by clamping

	r=testFile.Open(TheFs,aFileName,EFileRead|EFileShareAny);

	test(r == KErrNone);

	TTime origTime;

	TUint origAtt;

	r=testFile.Att(origAtt);

	test(r==KErrNone);

	r=testFile.Modified(origTime);

	test(r==KErrNone);

	TTime time;									// Arbitrary value

	TUint setMask=0xA5A5&~KEntryAttReadOnly;	// Not read-only, otherwise arbitrary value

	TUint clearMask=0x5A5A & KEntryAttReadOnly;	// Not read-only, otherwise arbitrary value

	r=testFile.Set(time,setMask,clearMask);

	test(r==KErrNone);

	r=testFile.Set(origTime,origAtt,~origAtt); // restore original values

	test(r==KErrNone);

	testFile.Close();

	// RFs::Rename - this should not be prevented by clamping

	r=TheFs.Rename(aFileName,_L("aDummyName"));

	test(r==KErrNone);

	r=TheFs.Rename(_L("aDummyName"),aFileName); // restore original name

	test(r==KErrNone);

	// RFs::Replace

	r=TheFs.Replace(aFileName,_L("aDummyName"));

	test(r==KErrInUse);

	// RFs::SetEntry - this should not be prevented by clamping

	r=TheFs.SetEntry(aFileName,time,setMask,clearMask);

	test(r==KErrNone);

	r=TheFs.SetEntry(aFileName,origTime,origAtt,~origAtt); // restore original values

	test(r==KErrNone);

	// RFs::Delete

	r=TheFs.Delete(aFileName);

	test(r==KErrInUse);

	// RRawDisk::Open (*** no longer required ***)

	}

LOCAL_C void Test3(TDesC& aRoot)

	{

// Denied FS requests when file(s) are clamped.

	test.Next(_L("T_Clamp - Test3()"));

// Clamping is reference counted, so we need a test to check that

// a file clamped N times cannot be modified until it has been unclamped N times.

// Should also check

// - Clamp N times

// - Unclamp M times (M<N)

// - Clamp M times.

// - Unclamp N times

#define MY_N 16

#define MY_M 12

	// Create a file for use

	TBuf<256> fileName;	

	TBuf<256> buf(_L("buffer for file used"));

	fileName = _L("clampFile.tst");

	RFile testFile;

	TInt r=testFile.Replace(TheFs,fileName,EFileWrite);

	test(r==KErrNone);

	TPtrC8 pBuf((TUint8*)&buf);

	testFile.Write(pBuf);

	testFile.Flush();

	// Close file,then re-open (to support clamping) in sharable mode

	// (to allow testing of RFile::Open with EFileWrite)

	testFile.Close();

	r=testFile.Open(TheFs,fileName,EFileWrite|EFileShareReadersOrWriters);

	test(r==KErrNone);

	// Show, prior to clamping, that the file can be opened with EFileWrite

	RFile testFile2;

	r=testFile2.Open(TheFs,fileName,EFileWrite|EFileShareReadersOrWriters);

	test(r==KErrNone);

	// Close the second RFile instance

	testFile2.Close();

	// Clamp and unclamp a number of times, and invoke the

	// operations to test

	RFileClamp myHandles[MY_N];

	RFileClamp *handlePtr = myHandles;

	TInt i = 0;

	// Clamp once

	r=handlePtr->Clamp(testFile);

	test(r==KErrNone);

	i++;

	// RFile::SetAtt - this should not be prevented by clamping

	TTime origTime;

	TUint origAtt;

	r=testFile.Att(origAtt);

	test(r==KErrNone);

	r=testFile.Modified(origTime);

	test(r==KErrNone);

	TTime time;									// Arbitrary value

	TUint setMask=0xA5A5&~KEntryAttReadOnly;	// Not read-only, otherwise arbitrary value

	TUint clearMask=0x5A5A & KEntryAttReadOnly;	// Not read-only, otherwise arbitrary value

	r=testFile.Att(origAtt);

	test(r==KErrNone);

	r=testFile.SetAtt(setMask,clearMask);

	test(r==KErrNone);

	r=testFile.Set(origTime,origAtt,~origAtt); // restore original values

	test(r==KErrNone);

	// RFile::SetModified - this should not be prevented by clamping

	r=testFile.Modified(origTime);

	test(r==KErrNone);

	r=testFile.SetModified(time);

	test(r==KErrNone);

	r=testFile.SetModified(origTime); // restore original value

	test(r==KErrNone);

	// RFile::Rename - this should not be prevented by clamping

	// Need file to be opened in EFileShareExclusive sharing mode,

	// so close, unclamp, re-open appropriately and re-clamp

	testFile.Close();

	r=handlePtr->Close(TheFs);

	test(r==KErrNone);

	i--;

	r=testFile.Open(TheFs,fileName,EFileWrite|EFileShareExclusive);

	test(r==KErrNone);

	r=handlePtr->Clamp(testFile);

	test(r==KErrNone);

	i++;

	r=testFile.Rename(_L("aDummyName"));

	test(r==KErrNone);

	r=testFile.Rename(fileName);

	test(r==KErrNone);

	// RFile::SetSize

	r=testFile.SetSize(1000); // Arbitrary value

	test(r==KErrInUse);

	// Test other RFile, RFs operations

	testFile.Close();

	Test3Operations(aRoot,fileName);

	// Increase number of clamps to MY_N

	r=testFile.Open(TheFs,fileName,EFileRead);

	test(r==KErrNone);

	for(; i < MY_N; i++)

		{

		handlePtr++;

		r=handlePtr->Clamp(testFile);

		test(r==KErrNone);

		}

	testFile.Close();

	Test3Operations(aRoot,fileName);

	// Decrease number of clamps by MY_M

	for(;i > (MY_N - MY_M); i--)

		{

		r=handlePtr->Close(TheFs);

		test(r==KErrNone);

		if(handlePtr!=myHandles)

			handlePtr--;

		else

			break;

		}

	Test3Operations(aRoot,fileName);

	// Increase number of clamps by MY_M

	r=testFile.Open(TheFs,fileName,EFileRead);

	test(r == KErrNone);

	TInt j=0;

	for(;j < MY_M; j++)

		{

		handlePtr++;

		r=handlePtr->Clamp(testFile);

		test(r==KErrNone);

		i++;

		}

	testFile.Close();

	Test3Operations(aRoot,fileName);

	// Decrease number of clamps by MY_N

	for(;i > 0; i--)

		{

		r=handlePtr->Close(TheFs);

		test(r==KErrNone);

		if(handlePtr!=myHandles)

			handlePtr--;

		else

			break;

		}

	// Test deferred dismount - use next free handle

	TestDeferredDismount(aRoot,fileName,handlePtr);

	// Re-create the test directory

	r=TheFs.MkDirAll(aRoot);

	test(r==KErrNone || r== KErrAlreadyExists);

	TheFs.SetSessionPath(aRoot);

	// No clamps remain - prove RFile::Open with EFileWrite

	r=testFile2.Open(TheFs,fileName,EFileWrite|EFileShareReadersOrWriters);

	test(r==KErrNone);

	testFile2.Close();

	// No clamps remain - prove that file can now be deleted

	r=TheFs.Delete(_L("clampFile.tst"));

	test (r==KErrNone);

	}

LOCAL_C void Test4(TDesC& aRoot)

	{

// Clamp tests for non-writable file system

	test.Next(_L("T_Clamp - Test4()"));

	// Tests are limited to clamp, unclamp and denied requests

	// when clamps are present.

	TBuf<256> pathName;	

#ifdef __WINS__

	if((aRoot[0]=='Z')||(aRoot[0]=='z'))

		pathName=_L("clean.txt");

	else

		pathName=_L("root.txt");

#else

	if((aRoot[0]=='Z')||(aRoot[0]=='z'))

		pathName=_L("UnicodeData.txt");

	else

		pathName=_L("\\Test\\clamp.txt");	// For (non-composite) ROFS drive

#endif

	RFile testFile;

	TInt r=testFile.Open(TheFs, pathName, EFileRead);

	test(r==KErrNone);

	// Clamp file

	RFileClamp handle;

	r=handle.Clamp(testFile);

	test(r==KErrNone);

	TInt64 storedCookie_0=handle.iCookie[0];

	TInt64 storedCookie_1=handle.iCookie[1];

	// Try to clamp previously-clamped file

	RFileClamp handle1;

	r=handle1.Clamp(testFile);

	test(r==KErrNone);

	// Unclamp file

	r=handle.Close(TheFs);

	test (r==KErrNone);

	// Check cookie content has been re-initialised

	test((0==handle.iCookie[0])&&(0==handle.iCookie[1]));

	// Try to unclamp a file that is not clamped

	handle.iCookie[0]=storedCookie_0;

	handle.iCookie[1]=storedCookie_1;

	r=handle.Close(TheFs);

	test (r==KErrNotFound);

	// Remove remaining clamp

	r=handle1.Close(TheFs);

	test (r==KErrNone);

	testFile.Close();

	if((aRoot[0]!='Z')&&(aRoot[0]!='z'))	// Can not dismount Z:

		TestDeferredDismount(aRoot,pathName,&handle);

	}

LOCAL_C void Test5()

	{

// Clamp requests on non-clamping file systems

	test.Next(_L("T_Clamp - Test5()"));

	TBuf<256> unsuppFile;	

	unsuppFile = _L("unsuppFile.tst");

	RFile testFile;

	TInt r=testFile.Replace(TheFs,unsuppFile,EFileWrite);

	test(r==KErrNone);

	// Try to clamp a file on a file system that does

	// not support clamping

	RFileClamp handle;

	r=handle.Clamp(testFile);

	test(r==KErrNotSupported);

	// Tidy up

	testFile.Close();

	r=TheFs.Delete(_L("unsuppFile.tst"));

	test (r==KErrNone);

	}	

LOCAL_C void GetDriveLetters()

	{

// Assign the first drive that matches the required criteria

	test.Next(_L("T_Clamp - GetDriveLetters()"));

	TDriveList driveList;

	TDriveInfo driveInfo;

	TInt r=TheFs.DriveList(driveList);

	test(r==KErrNone);

	TInt drvNum;

	TBool drivesFound = EFalse;

	for(drvNum=0; (drvNum<KMaxDrives) && !drivesFound; drvNum++)

		{

		TChar drvLetter='?';

		TFileName fileSystem;

		if(!driveList[drvNum])

			continue;

		test(TheFs.Drive(driveInfo, drvNum) == KErrNone);

		test(TheFs.DriveToChar(drvNum,drvLetter) == KErrNone);

		r=TheFs.FileSystemName(fileSystem,drvNum);

		fileSystem.UpperCase();

		test((r==KErrNone)||(r==KErrNotFound));

		if (!(driveInfo.iDriveAtt & KDriveAttInternal))

			continue;

		// Check for FAT on NAND

		if(NandFatDrv=='?')

			{

			if((driveInfo.iType==EMediaNANDFlash) && (fileSystem.Compare(KFATName)==0))

				NandFatDrv=drvLetter;

			}

		// Check for ROFS

		if(RofsDrv=='?')

			{

			if((driveInfo.iType==EMediaNANDFlash) && (fileSystem.Compare(KROFSName)==0))

				RofsDrv=drvLetter;

			}

		// Check for LFFS

		if(LffsDrv=='?')

			{

			if((driveInfo.iType==EMediaFlash) && (fileSystem.Compare(KLFFSName)==0))

				LffsDrv=drvLetter;

			}

		// Check for CompFSys

		if(CompDrv=='?')

			{

			if((driveInfo.iType==EMediaRom) && ((fileSystem.Compare(KROMName)==0)||(fileSystem.Compare(KCOMPName)==0)))

				CompDrv=drvLetter;

			}

		drivesFound=((NandFatDrv!='?')&&(RofsDrv!='?')&&(LffsDrv!='?')&&(CompDrv!='?'));

		}

	if(NandFatDrv!='?')

		test((NandFatDrv!=RofsDrv)&&(NandFatDrv!=LffsDrv)&&(NandFatDrv!=CompDrv));

	if(RofsDrv!='?')

		test((RofsDrv!=LffsDrv)&&(RofsDrv!=CompDrv));

	if(LffsDrv!='?')

		test(LffsDrv!=CompDrv);

	RDebug::Printf("T_CLAMP: FAT drive=%C, ROFS drive=%C, LFFS drive=%C, ROM-COMP drive=%C \n",(TText)NandFatDrv,(TText)RofsDrv,(TText)LffsDrv,(TText)CompDrv);

	return;

	}

//

// E32Main

//

TInt E32Main()

	{

	TInt r;

	test.Title();

	test.Start(_L("Starting T_CLAMP ..."));

	test(TheFs.Connect()==KErrNone);

	GetDriveLetters();

	TBuf<256> pathName;	

	//************************************************************************

	//

	// Test on FAT (writable file system)

	//

	//************************************************************************

	if(NandFatDrv!='?')

		{

		pathName=_L("?:\\CLAMP-TST\\");	// FAT on NAND

		pathName[0]=(TText)NandFatDrv;

		r=TheFs.MkDirAll(pathName);

		test(r==KErrNone || r== KErrAlreadyExists);

		TheFs.SetSessionPath(pathName);

		test.Printf( _L("T_CLAMP: testing FAT drive on %C\n"),(TText)NandFatDrv);

		Test1();		// Basic clamp operation

		Test2();		// Invalid clamp requests

		Test3(pathName);// Denied FS requests when files are clamped

		r=TheFs.RmDir(pathName);

		test(r==KErrNone);

		}

	else

		test.Printf( _L("T_CLAMP: FAT drive not tested\n"));

	//************************************************************************

	//

	// Test on ROFS (non-writable file system) 

	//

	//************************************************************************

	if(RofsDrv!='?')

		{

		pathName=_L("?:\\");

		pathName[0]=(TText)RofsDrv;

		TheFs.SetSessionPath(pathName);

		test.Printf( _L("T_CLAMP: testing ROFS drive on %C\n"),(TText)RofsDrv);

		Test4(pathName);	// Clamp tests for non-writable file system

		}

	else

		test.Printf( _L("T_CLAMP: ROFS drive not tested\n"));

	//************************************************************************

	//

	// Test on Z: - Composite File System, or ROMFS (non-writable file system)

	//

	//************************************************************************

	if(CompDrv!='?')

		{

		pathName=_L("?:\\TEST\\");

		pathName[0]=(TText)CompDrv;

		TheFs.SetSessionPath(pathName);

		test.Printf( _L("T_CLAMP: testing Z drive (on %C)\n"),(TText)CompDrv);

		Test4(pathName);	// Clamp tests for non-writable file system

		}

	else

		test.Printf( _L("T_CLAMP: Z drive not tested\n"));

	//************************************************************************

	//

	// Test on LFFS (non-clampable file system)

	//

	//************************************************************************

	if(LffsDrv!='?')

		{

		TBuf<256> unsuppPath;	

		unsuppPath=_L("?:\\CLAMP-TST\\");

		unsuppPath[0]=(TText)LffsDrv;

		r=TheFs.MkDirAll(unsuppPath);

		test(r==KErrNone || r== KErrAlreadyExists);

		TheFs.SetSessionPath(unsuppPath);

		test.Printf( _L("T_CLAMP: testing LFFS drive on %C\n"),(TText)LffsDrv);

		Test5();		// Clamp requests on non-clamping file systems

		}

	else

		test.Printf( _L("T_CLAMP: LFFS drive not tested\n"));

	test.End();

	return 0;

	}

#else

TInt E32Main()

	{

	test.Title();

	test.Start(_L("Test does not run on UREL builds."));

	test.End();

	return 0;

	}

#endif