author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 15:21:33 +0300 | |
branch | RCL_3 |
changeset 25 | 7333d7932ef7 |
permissions | -rw-r--r-- |
25
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/* |
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* Copyright (c) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* CIntegrityServices implementation |
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* |
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*/ |
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/** |
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@file |
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@released |
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@internalTechnology |
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*/ |
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#include "integrityservices.h" |
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#include "journal.h" |
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#include "operationfunctions.h" |
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#include "usiflog.h" |
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#include <f32file.h> |
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using namespace Usif; |
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_LIT(KTransactionPath, "\\sys\\install\\integrityservices\\"); |
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CIntegrityServices::TFailType CIntegrityServices::iFailType = EFailNone; |
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CIntegrityServices::TFailPosition CIntegrityServices::iFailPosition = EBeforeJournal; |
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TFileName CIntegrityServices::iFailFileName; |
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TBool CIntegrityServices::iIsFailureTestingEnabled = EFalse; |
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/** |
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* This is a trivial C class that just encapsulates a TEntryArray object in order to |
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* facilitate its storage on the heap. |
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* |
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* @released |
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* @internalComponent |
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*/ |
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class CEntryArray : public CBase |
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{ |
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public: |
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inline TEntryArray& operator()(); |
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private: |
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/** |
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* Container to hold file entries |
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*/ |
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TEntryArray iEntryArray; |
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}; |
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inline TEntryArray& CEntryArray::operator()() |
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{ |
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return iEntryArray; |
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} |
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CIntegrityServices* CIntegrityServices::NewL(TStsTransactionId aTransactionID) |
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{ |
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CIntegrityServices* self = CIntegrityServices::NewLC(aTransactionID); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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CIntegrityServices* CIntegrityServices::NewLC(TStsTransactionId aTransactionID) |
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{ |
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CIntegrityServices* self = new(ELeave) CIntegrityServices(aTransactionID); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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return self; |
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} |
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CIntegrityServices::CIntegrityServices(TStsTransactionId aTransactionID) : iTransactionID(aTransactionID) |
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{ |
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} |
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CIntegrityServices::~CIntegrityServices() |
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{ |
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delete iJournal; |
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iFs.Close(); |
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iLoader.Close(); |
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} |
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void CIntegrityServices::ConstructL() |
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{ |
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DEBUG_PRINTF2(_L("CIntegrityServices::ConstructL() - Opening session with Session ID %X."), iTransactionID); |
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User::LeaveIfError(iFs.Connect()); |
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User::LeaveIfError(iFs.ShareProtected()); //needed as new RFiles are to be passed back to client's side |
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User::LeaveIfError(iLoader.Connect()); |
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// store the journal path and create the journal |
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TParsePtrC pathPtr(KTransactionPath); |
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iJournalPath = pathPtr.Path(); |
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iJournal = CJournal::NewL(iFs, iLoader, iTransactionID, iJournalPath); |
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iSystemDrive = ::RFs::GetSystemDrive(); |
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107 |
} |
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|
108 |
|
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const TInt KIntegrityServicesSimulatedBatteryFailure=-10205; |
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|
110 |
|
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/*static*/ void CIntegrityServices::SimulatePowerFailureL(TFailType aFailType, TFailPosition aFailPosition, const TDesC& aFailFileName) |
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112 |
{ |
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if (!iIsFailureTestingEnabled) |
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return; |
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|
115 |
|
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if(iFailType == aFailType && iFailPosition == aFailPosition && iFailFileName == aFailFileName) |
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117 |
{ |
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User::Leave(KIntegrityServicesSimulatedBatteryFailure); |
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119 |
} |
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120 |
} |
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|
121 |
|
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122 |
/*static*/ void CIntegrityServices::NormalizeDirectoryName(TDes& aFileName) |
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123 |
{ |
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124 |
// Directories are represented in the integrity tree and integrity journal exactly as files, |
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125 |
// without the trailing slash |
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TInt lastCharPos = aFileName.Length() - 1; |
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if ( lastCharPos >= 0 && aFileName[lastCharPos] == KPathDelimiter && |
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aFileName.Locate(KPathDelimiter) != lastCharPos) // Take care not to remove slash from "c:\" and the like |
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129 |
{ |
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aFileName.Delete(lastCharPos, 1); |
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131 |
} |
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132 |
} |
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|
133 |
|
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134 |
void CIntegrityServices::RegisterNewL(const TDesC& aFileName) |
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|
135 |
{ |
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136 |
DEBUG_PRINTF3(_L("CIntegrityServices::RegisterNewL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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|
137 |
|
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|
138 |
HBufC* localFilenameHeap = aFileName.AllocLC(); |
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|
139 |
TPtr localFilename = localFilenameHeap->Des(); |
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|
140 |
NormalizeDirectoryName(localFilename); // If it is a directory name, make sure to normalize it |
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|
141 |
|
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|
142 |
// Record the added file or directory in the journal |
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|
143 |
SimulatePowerFailureL(EFailAddingNewFile, EBeforeJournal, aFileName); |
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|
144 |
iJournal->AddL(localFilename); |
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|
145 |
SimulatePowerFailureL(EFailAddingNewFile, EAfterJournal, aFileName); |
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|
146 |
CleanupStack::PopAndDestroy(localFilenameHeap); |
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|
147 |
} |
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|
148 |
|
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149 |
void VerifyMkDirErrorL(TInt err) |
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|
150 |
{ |
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|
151 |
if(err != KErrNone && err != KErrAlreadyExists) |
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|
152 |
{ |
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|
153 |
User::Leave(err); |
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|
154 |
} |
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|
155 |
} |
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|
156 |
|
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|
157 |
void ProcessNewFileRegistrationResultL(TInt err, RFs& aFs, const TDesC& aFileName, RFile& aFile) |
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|
158 |
{ |
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|
159 |
if(err!= KErrNone) |
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|
160 |
{ |
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|
161 |
//if we hit this point it means we successfully created the new file however registering with the transaction has failed |
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|
162 |
//so we have to remove the new file to make the journal and the file system consistent |
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|
163 |
aFile.Close(); |
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|
164 |
aFs.Delete(aFileName); |
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|
165 |
User::Leave(err); |
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|
166 |
} |
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|
167 |
} |
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|
168 |
|
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|
169 |
void CIntegrityServices::CreateNewL(const TDesC& aFileName, RFile &newFile, TUint aFileMode) |
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|
170 |
{ |
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|
171 |
DEBUG_PRINTF3(_L("CIntegrityServices::CreateNewL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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|
172 |
TInt err = iFs.MkDirAll(aFileName); //first we have to create the full directory path to aFileName otherwise RFs::Create will fail |
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|
173 |
VerifyMkDirErrorL(err); |
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|
174 |
User::LeaveIfError(newFile.Create(iFs, aFileName, aFileMode)); |
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|
175 |
TRAPD(regResult, RegisterNewL(aFileName)); |
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|
176 |
ProcessNewFileRegistrationResultL(regResult, iFs, aFileName, newFile); //checks if the registration failed and cleans up the file in the filesystem if it did |
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|
177 |
} |
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|
178 |
|
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|
179 |
void CIntegrityServices::RemoveL(const TDesC& aFileName) |
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|
180 |
{ |
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|
181 |
DEBUG_PRINTF3(_L("CIntegrityServices::RemoveL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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|
182 |
|
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|
183 |
// before doing anything check that the file or directory exists |
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|
184 |
TEntry entry; |
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|
185 |
|
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|
186 |
TInt res = iFs.Entry(aFileName, entry); |
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|
187 |
if (res == KErrNotFound || res == KErrPathNotFound) |
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|
188 |
return; // If the file is not present, do nothing. Returning an error would require the user of the API to do additional checks |
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|
189 |
User::LeaveIfError(res); |
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|
190 |
|
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|
191 |
// We might need to grow this buffer by one byte later |
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|
192 |
HBufC* localFilenameHeap = HBufC::NewLC(aFileName.Length() + 1); |
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|
193 |
TPtr localFilename = localFilenameHeap->Des(); |
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|
194 |
localFilename.Copy(aFileName); |
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|
195 |
|
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|
196 |
TBool isFilenameDir = entry.IsDir(); |
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|
197 |
// The "if" below is not functionally necessary, but it is a slight optimization - |
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|
198 |
// so that we won't attempt to normalize directory name on files. The optimization is not |
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|
199 |
// done in AddL or NormalizeDirectoryName itself, since we don't have future use for TEntry there, and the cost for RFs::Entry overweighs the one for NormalizeDirectoryName |
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|
200 |
if ( isFilenameDir ) |
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|
201 |
{ |
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|
202 |
NormalizeDirectoryName(localFilename); |
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|
203 |
} |
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|
204 |
|
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|
205 |
RBuf backupFileName; |
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|
206 |
backupFileName.CreateL(KMaxFileName); |
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|
207 |
CleanupClosePushL(backupFileName); |
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|
208 |
SimulatePowerFailureL(EFailRemovingFile, EBeforeJournal, aFileName); |
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|
209 |
iJournal->RemoveL(localFilename, backupFileName); |
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|
210 |
|
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|
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if (backupFileName.Length()) |
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|
212 |
{ |
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|
213 |
SimulatePowerFailureL(EFailRemovingFile, EAfterJournal, aFileName); |
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|
214 |
|
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|
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TInt err = iFs.MkDirAll(backupFileName); |
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Revision: 201033
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|
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VerifyMkDirErrorL(err); |
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diff
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|
217 |
|
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|
218 |
SimulatePowerFailureL(EFailRemovingFile, EBeforeAction, aFileName); |
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diff
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|
219 |
err = iFs.Rename(localFilename, backupFileName); |
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Revision: 201033
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|
220 |
DEBUG_PRINTF4(_L("CIntegrityServices::RemoveL() - Renamed %S as %S error %d"), &localFilename, &backupFileName, err); |
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|
221 |
User::LeaveIfError(err); |
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Revision: 201033
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diff
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|
222 |
SimulatePowerFailureL(EFailRemovingFile, EAfterAction, aFileName); |
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|
223 |
} |
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diff
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|
224 |
else |
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|
225 |
{ |
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|
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DEBUG_PRINTF2(_L("CIntegrityServices::RemoveL() - %S already backed up"), &aFileName); |
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diff
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|
227 |
SimulatePowerFailureL(EFailRemovingFile, EBeforeAction, aFileName); |
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Revision: 201033
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|
228 |
// If backupFileName is zero-length, the file was added earlier |
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Revision: 201033
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|
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// in the same journal and doesn't need to be backed up. |
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Revision: 201033
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|
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if (isFilenameDir) |
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Revision: 201033
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diff
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|
231 |
{ |
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diff
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|
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CFileMan* fileman = CFileMan::NewL(iFs); |
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diff
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|
233 |
CleanupStack::PushL(fileman); |
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Revision: 201033
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parents:
diff
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|
234 |
// Make sure to append slash before calling RmDir - otherwise it deletes the parent directory |
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Revision: 201033
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|
235 |
if (localFilename[localFilename.Length()-1] != KPathDelimiter) |
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diff
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|
236 |
{ |
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diff
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|
237 |
localFilename.Append(KPathDelimiter); |
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Revision: 201033
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diff
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|
238 |
} |
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Revision: 201033
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diff
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|
239 |
User::LeaveIfError(fileman->RmDir(localFilename)); // A directory cannot be a paged exec., so we don't have to use iLoader |
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diff
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|
240 |
CleanupStack::PopAndDestroy(fileman); |
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diff
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|
241 |
} |
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diff
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|
242 |
else |
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Revision: 201033
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parents:
diff
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|
243 |
{ |
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Revision: 201033
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parents:
diff
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|
244 |
User::LeaveIfError(iLoader.Delete(aFileName)); |
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Revision: 201033
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diff
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|
245 |
} |
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Revision: 201033
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parents:
diff
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|
246 |
SimulatePowerFailureL(EFailRemovingFile, EAfterAction, aFileName); |
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Revision: 201033
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diff
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|
247 |
} |
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Revision: 201033
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diff
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|
248 |
|
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Revision: 201033
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parents:
diff
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|
249 |
// Don't leave an empty directory structure, try pruning it |
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Revision: 201033
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parents:
diff
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|
250 |
RemoveDirectoryTreeL(iFs, aFileName); |
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Revision: 201033
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parents:
diff
changeset
|
251 |
|
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Revision: 201033
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parents:
diff
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|
252 |
CleanupStack::PopAndDestroy(2, localFilenameHeap); // backupFileName |
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Revision: 201033
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parents:
diff
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|
253 |
} |
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Revision: 201033
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diff
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|
254 |
|
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Revision: 201033
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diff
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|
255 |
void CIntegrityServices::RegisterTemporaryL(const TDesC& aFileName) |
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Revision: 201033
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diff
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|
256 |
{ |
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Revision: 201033
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|
257 |
DEBUG_PRINTF3(_L("CIntegrityServices::RegisterTemporaryL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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diff
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|
258 |
|
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Revision: 201033
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diff
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|
259 |
// record the temporary file or directory in the journal |
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Revision: 201033
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diff
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|
260 |
SimulatePowerFailureL(EFailAddingTempFile, EBeforeJournal, aFileName); |
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Revision: 201033
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parents:
diff
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|
261 |
iJournal->TemporaryL(aFileName); |
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Revision: 201033
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parents:
diff
changeset
|
262 |
SimulatePowerFailureL(EFailAddingTempFile, EAfterJournal, aFileName); |
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Revision: 201033
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parents:
diff
changeset
|
263 |
} |
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Revision: 201033
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parents:
diff
changeset
|
264 |
|
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Revision: 201033
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diff
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|
265 |
void CIntegrityServices::CreateTemporaryL(const TDesC& aFileName, RFile &newFile, TUint aFileMode) |
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diff
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|
266 |
{ |
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Revision: 201033
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diff
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|
267 |
DEBUG_PRINTF3(_L("CIntegrityServices::CreateTemporaryL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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Revision: 201033
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parents:
diff
changeset
|
268 |
|
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Revision: 201033
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parents:
diff
changeset
|
269 |
TInt err = iFs.MkDirAll(aFileName); //first we have to create the full directory path to aFileName otherwise RFs::Create will fail |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
270 |
VerifyMkDirErrorL(err); |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
271 |
User::LeaveIfError(newFile.Create(iFs, aFileName, aFileMode)); |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
272 |
TRAPD(regResult, RegisterTemporaryL(aFileName)); |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
273 |
ProcessNewFileRegistrationResultL(regResult, iFs, aFileName, newFile); |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
274 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
275 |
|
7333d7932ef7
Revision: 201033
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diff
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|
276 |
void CIntegrityServices::OverwriteL(const TDesC& aFileName, RFile &newFile, TUint aFileMode) |
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Revision: 201033
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diff
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|
277 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
278 |
DEBUG_PRINTF3(_L("CIntegrityServices::OverwriteL() - Session %X, File: %S."), iTransactionID, &aFileName); |
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Revision: 201033
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diff
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|
279 |
|
7333d7932ef7
Revision: 201033
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diff
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|
280 |
TBool b; |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
281 |
TInt err; |
7333d7932ef7
Revision: 201033
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diff
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|
282 |
if((err=iFs.IsFileOpen(aFileName, b))== KErrNone) //returned error code shows whether the file exists or not; the bool value is ignored |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
283 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
284 |
//file exists remove first |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
285 |
RemoveL(aFileName); |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
286 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
287 |
else |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
288 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
289 |
if(err != KErrNotFound) |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
290 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
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|
291 |
User::Leave(err); |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
292 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
293 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
294 |
CreateNewL(aFileName, newFile, aFileMode); |
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
295 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
296 |
|
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
297 |
void CIntegrityServices::CommitL() |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
298 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
299 |
DEBUG_PRINTF2(_L("CIntegrityServices::CommitL() - Session %X."), iTransactionID); |
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
300 |
iJournal->CommitL(); |
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
301 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
302 |
|
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
303 |
void CIntegrityServices::RollBackL(TBool aRecordAllRollbackEvents /* = ETrue */) |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
304 |
{ |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
305 |
DEBUG_PRINTF2(_L("CIntegrityServices::RollBackL() - transaction %X"), iTransactionID); |
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
306 |
iJournal->RollBackL(aRecordAllRollbackEvents); |
7333d7932ef7
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
307 |
} |
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
308 |
|
7333d7932ef7
Revision: 201033
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parents:
diff
changeset
|
309 |
/*static*/ void CIntegrityServices::GetListOfTransactionsL(RArray<TStsTransactionId>& aIdArray) |
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{ |
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RFs fs; |
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User::LeaveIfError(fs.Connect()); |
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CleanupClosePushL(fs); |
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TDriveUnit systemDrive(::RFs::GetSystemDrive()); |
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RBuf fileSpec; |
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fileSpec.CreateL(systemDrive.Name(), KMaxFileName); |
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CleanupClosePushL(fileSpec); |
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fileSpec.Append(KTransactionPath); |
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fileSpec.Append(KMatchAny); |
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fileSpec.Append(KExtDelimiter); |
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fileSpec.Append(KDriveExt); |
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322 |
|
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RDir dir; |
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TInt err = dir.Open(fs, fileSpec, KEntryAttNormal); |
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CleanupStack::PopAndDestroy(&fileSpec); |
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if (err == KErrPathNotFound || err == KErrNotFound) |
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{ |
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CleanupStack::PopAndDestroy(&fs); |
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return; // These errors are not considered fatal - there may be no journals present |
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} |
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User::LeaveIfError(err); |
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CleanupClosePushL(dir); |
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333 |
|
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CEntryArray* entryArrayContainer = new (ELeave) CEntryArray; |
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TEntryArray& entryArray = (*entryArrayContainer)(); |
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err = dir.Read(entryArray); |
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CleanupStack::PopAndDestroy(&dir); |
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CleanupStack::PushL(entryArrayContainer); |
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if (err != KErrNone && err != KErrEof) |
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340 |
{ |
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User::Leave(err); |
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} |
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TInt entryCount(entryArray.Count()); |
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for (TInt index = 0; index < entryCount; ++index) |
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{ |
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TStsTransactionId transactionID; |
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if (CJournal::RecoverTransactionIdFromDrvFileName( |
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entryArray[index].iName, transactionID) == KErrNone) |
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{ |
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aIdArray.AppendL(transactionID); |
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} |
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352 |
} |
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CleanupStack::PopAndDestroy(entryArrayContainer); |
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CleanupStack::PopAndDestroy(&fs); |
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} |
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|
356 |
|
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/*static*/ void CIntegrityServices::RollbackAllL() |
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358 |
{ |
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RArray<TStsTransactionId> transactionIDs; |
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CleanupClosePushL(transactionIDs); |
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CIntegrityServices::GetListOfTransactionsL(transactionIDs); |
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TInt numberOfTransactions(transactionIDs.Count()); |
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TInt lastError=KErrNone; |
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DEBUG_PRINTF2(_L("CIntegrityServices::RollbackAllL() %d transactions have been found."), numberOfTransactions ); |
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for(TInt i=0; i<numberOfTransactions; ++i) |
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366 |
{ |
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DEBUG_PRINTF2(_L("CIntegrityServices::RollbackAllL() Trying to roll back transaction %X"), transactionIDs[i]); |
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TRAPD(err, |
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|
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CIntegrityServices* transactionPtr = CIntegrityServices::NewLC(transactionIDs[i]); |
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|
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transactionPtr->RollBackL(EFalse); // Specify not to record roll back events. If we failed in the middle of a previous roll back, due to lack of resources we shouldn't be trying to record more events |
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|
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CleanupStack::PopAndDestroy(transactionPtr); |
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|
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); //failing to roll back one transaction shouldn't affect the overall rollback all procedure |
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if(err!=KErrNone) |
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|
374 |
{ |
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|
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lastError=err; //remember last error and leave with that error code indicating an error in the overall procedure |
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|
376 |
} |
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|
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DEBUG_PRINTF2(_L("CIntegrityServices::RollbackAllL() Rolled back transaction %X"), transactionIDs[i]); |
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|
378 |
} |
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|
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CleanupStack::PopAndDestroy(&transactionIDs); |
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|
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User::LeaveIfError(lastError); |
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|
381 |
} |