<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (c) 2007-2010 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: 

-->

<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-ACDED56F-38FE-491D-B019-BE2C53A75D28" xml:lang="en"><title>Data

caging</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>Data caging means that the applications and the users have access only

to certain areas of the file system. In practice the applications can access

their own private folders and folders that are marked as open. It means, for

example, that one application cannot access the private folder and data of

another application. There are restricted file storage areas for system, private,

and resource data.</p>

<p>The file system has the following structure:</p>

<ul>

<li><p>The <codeph>\sys</codeph> folder is the restricted system

area. You need <codeph>AllFiles</codeph> capability to read the content, and

Trusted Computing Base (<codeph>TCB</codeph>) capability to modify the content.</p>

<p>The subfolder <codeph>\sys\bin\</codeph> contains all binaries (<codeph>exe</codeph>, <codeph>dll</codeph>,

etc.). All binaries must have a different name. An application can only be

launched from this subfolder.</p></li>

<li><p>The <parmname>\private\</parmname> folder includes folders

for all applications.</p><p>The <codeph>\private\&lt;SID&gt;\</codeph> subfolder

contains private data only to be accessed by the application itself. SID is

determined by the <xref href="GUID-3B6E25F7-C1A8-461F-97F7-421DB559BC98.dita#GUID-3B6E25F7-C1A8-461F-97F7-421DB559BC98/GUID-EEC50FC0-46D5-4ED7-AD95-67430D5EC652">Secure

Identifier</xref> of the process. Without any capabilities you can read and

write only in the application's own directory. You need <codeph>AllFiles</codeph> capability

to access all private directories. Backup software can read and write to this

directory.</p><p>The <codeph>\private\&lt;SID&gt;\import\</codeph> subfolder

is for resource files, such as registration files, that are not directly related

to the application. You can write into this subfolder only after it is created

and named correctly.</p><p>Application registration resource files should

be installed in the <parmname>\private\10003a3f\import\apps</parmname> subfolder.</p>

</li>

<li><p>The <parmname>\resource</parmname> folder is for sharing

resource files.  This data can be icons, bitmaps, and other material useful

for all the applications. You do not need any capabilities to read these files.

You need <codeph>TCB</codeph> capability to modify the content.</p><p>ECom

registration resource files should be installed in the <parmname>\resource\plugins</parmname> subfolder.</p>

</li>

</ul>

<p>For more information, see <xref href="GUID-54E62386-E4DB-55C3-BA9A-FFB7BFE6703E.dita">File

locations</xref>.</p>

</conbody></concept>