MCL/sf/os/kernelhwsrv: comparison userlibandfileserver/fileserver/inc/f32file.h

equal deleted inserted replaced

--1:000000000000
+:96e5fb8b040d
+// Copyright (c) 1995-2009 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:
+//
+/**
+@file
+@publishedAll
+@released
+*/
+#if !defined(__F32FILE_H__)
+#define __F32FILE_H__
+#if !defined(__E32BASE_H__)
+#include <e32base.h>
+#endif
+#if !defined(__E32SVR_H__)
+#include <e32svr.h>
+#endif
+#include <e32ldr.h>
+/**
+@publishedAll
+@released
+The session default drive.
+*/
+const TInt KDefaultDrive=KMaxTInt;
+/**
+@publishedAll
+@released
+Indicates a drive letter which is not in use.
+This is useful when scanning a drive list to find which drives are available.
+*/
+const TInt KDriveAbsent=0x00;
+/**
+@publishedAll
+@released
+The default value for the number of message slots passed to RFs::Connect().
+@see RFs::Connect
+*/
+const TInt KFileServerDefaultMessageSlots=-1;
+/**
+@publishedAll
+@released
+The size of the array of TEntry items contained in a TEntryArray object.
+@see TEntryArray
+@see TEntry
+*/
+const TInt KEntryArraySize=(0x200*sizeof(TText));
+/**
+@publishedAll
+@released
+The character used to separate directories in the path name.
+*/
+const TInt KPathDelimiter='\\';
+/**
+@publishedAll
+@released
+The character used to separate the drive letter from the path.
+*/
+const TInt KDriveDelimiter=':';
+/**
+@publishedAll
+@released
+The character used to separate the filename from the extension.
+*/
+const TInt KExtDelimiter='.';
+/**
+@publishedAll
+@released
+The maximum number of available drives.
+*/
+const TInt KMaxDrives=26;
+/**
+@publishedAll
+@released
+The maximum number of available proxy drives.
+*/
+const TInt KMaxProxyDrives=KMaxDrives-KMaxLocalDrives;
+/**
+@publishedAll
+@released
+Defines a modifiable buffer descriptor to contain a drive list.
+The descriptor has maximum length KMaxDrives, sufficient to contain
+all possible drive letters.
+@see RFs::DriveList
+@see KMaxDrives
+*/
+typedef TBuf8<KMaxDrives> TDriveList;
+/**
+@publishedAll
+@released
+The maximum length of a drivename.
+Sufficient for a drive letter and colon.
+*/
+const TInt KMaxDriveName=0x02;
+/**
+@publishedAll
+@released
+Defines a modifiable buffer descriptor to contain a drive name.
+A drive name comprises a drive letter (A through Z) and a colon.
+KMaxDriveName (2 bytes) is sufficient for a drive letter and colon.
+@see TDriveUnit::Name
+@see KMaxDriveName
+*/
+typedef TBuf<KMaxDriveName> TDriveName;
+/**
+@publishedAll
+@released
+The maximum length of a file system name or file system sub type name.
+32 characters is sufficient for a file system or sub type name.
+*/
+const TInt KMaxFSNameLength=0x0020;
+/**
+@publishedAll
+@released
+Defines a modifiable buffer descriptor to contain a file system or file system sub type name.
+@see KMaxFSNameLength
+*/
+typedef TBuf<KMaxFSNameLength> TFSName;
+/**
+@publishedAll
+@released
+File/directory attribute: any file without the hidden or system attribute.
+*/
+const TUint KEntryAttNormal=0x0000;
+/**
+@publishedAll
+@released
+File/directory attribute: read-only file or directory.
+*/
+const TUint KEntryAttReadOnly=0x0001;
+/**
+@publishedAll
+@released
+File/directory attribute: hidden file or directory.
+*/
+const TUint KEntryAttHidden=0x0002;
+/**
+@publishedAll
+@released
+File/directory attribute: system file.
+*/
+const TUint KEntryAttSystem=0x0004;
+/**
+@publishedAll
+@released
+File/directory attribute: volume name directory.
+*/
+const TUint KEntryAttVolume=0x0008;
+/**
+@publishedAll
+@released
+File/directory attribute: a directory without the hidden or system attribute.
+*/
+const TUint KEntryAttDir=0x0010;
+/**
+@publishedAll
+@released
+File/directory attribute: an archive file.
+*/
+const TUint KEntryAttArchive=0x0020;
+/**
+@publishedAll
+@released
+File/directory attribute: ROM eXecute In Place file
+*/
+const TUint KEntryAttXIP=0x0080;
+/**
+@publishedAll
+@released
+This file attribute bit is set if the file exists only on a remote file
+system and is not locally cached.
+Due to the potential high-latency of remote file systems, applications
+(or users of applications) may make use of this bit to modify their
+behaviour when working with remote files.
+This is a read-only attribute, so any attempt to set this attribute will
+will be ignored.
+*/
+const TUint KEntryAttRemote=0x0100;
+/**
+@publishedAll
+@released
+The range of entry attributes reserved for file-system specific meanings.
+File systems may assign meaning to these bits, but their definition will
+not be supported nor maintained by Symbian.
+All other file attribute bits are reserved for use by Symbian.
+The following table summarises the assignment of attribute bits:
+	 0 - KEntryAttReadOnly
+	 1 - KEntryAttHidden
+	 2 - KEntryAttSystem
+	 3 - KEntryAttVolume
+	 4 - KEntryAttDir
+	 6 - KEntryAttArchive
+	 7 - KEntryAttXIP
+	 8 - KEntryAttRemote
+	 9 - Reserved
+	10 - Reserved
+	11 - Reserved
+	12 - Reserved
+	13 - Reserved
+	14 - Reserved
+	15 - Reserved
+	16 - File System Specific
+	17 - File System Specific
+	18 - File System Specific
+	19 - File System Specific
+	20 - File System Specific
+	22 - File System Specific
+	22 - File System Specific
+	23 - File System Specific
+	24 - KEntryAttPacked
+	25 - Reserved
+	26 - Reserved
+	27 - KEntryAttMatchExclude
+	28 - KEntryAttAllowUid
+	29 - Reserved
+	30 - KEntryAttMatchExclusive
+	31 - Reserved
+*/
+const TUint KEntryAttMaskFileSystemSpecific=0x00FF0000;
+/**
+@publishedAll
+@released
+Bit mask for matching file and directory entries.
+This mask ensures that directories and hidden and
+system files are matched.
+(Note that KEntryAttNormal matches all entry types except directories, hidden
+and system entries).
+@see RFs::GetDir
+*/
+const TUint KEntryAttMatchMask=(KEntryAttHidden|KEntryAttSystem|KEntryAttDir);
+/**
+@publishedAll
+@released
+Bit mask for matching file and directory entries.
+This is used when all entry types, including hidden and system files,
+but excluding the volume entry are to be matched.
+@see RFs::GetDir
+*/
+const TUint KEntryAttMaskSupported=0x3f;
+/**
+@publishedAll
+@released
+Bit mask for matching file and directory entries.
+This is used for exclusive matching. When OR'ed with one or more file attribute
+constants, for example, KEntryAttNormal, it ensures that only the files with
+those attributes are matched.
+When OR’ed with KEntryAttDir, directories only (not hidden or system) are matched.
+@see KEntryAttDir
+@see KEntryAttNormal
+@see RFs::GetDir
+*/
+const TUint KEntryAttMatchExclusive=0x40000000;
+/**
+@publishedAll
+@released
+Bit mask for feature manager file entries.
+It is used in order to identify each ROM feature set data file
+uniquely in the mount order of ROM sections.
+*/
+const TUint KEntryAttUnique=0x01000000;
+/**
+@publishedAll
+@released
+Bit mask for matching file and directory entries.
+It is used to exclude files or directories with certain attributes from
+directory listings. This bitmask has the opposite effect
+to KEntryAttMatchExclusive. For example:
+@code
+KEntryAttMatchExclude|KEntryAttReadOnly
+@endcode
+excludes all read only entries from the directory listing.
+@code
+KEntryAttMatchExclusive|KEntryAttReadOnly
+@endcode
+lists only read only entries.
+@see KEntryAttMatchExclusive
+@see RFs::GetDir
+*/
+const TUint KEntryAttMatchExclude=0x08000000;
+/**
+@publishedAll
+@released
+Bit mask for matching file and directory entries.
+Bit mask flag used when UID information should be included in the directory
+entry listing.
+@see RFs::GetDir
+*/
+const TUint KEntryAttAllowUid=0x10000000;
+/**
+@publishedAll
+@released
+Indicates that a TEntry (that is generally returned from a TEntryArray) is
+stored in packed format where the iSizeHigh and iReserved fields follow the
+valid characters of the name string.  Before accessing the aforementioned
+members, the entry must be unpacked.
+*/
+const TUint KEntryAttPacked = 0x01000000;
+/**
+@publishedAll
+@released
+*/
+const TUint KMaxMapsPerCall = 0x8;
+enum TNotifyType
+/**
+@publishedAll
+@released
+A set of change notification flags.
+These flags indicate the kind of change that should result in notification.
+This is useful for programs that maintain displays of file lists that
+must be dynamically updated.
+@see RFs::NotifyChange
+@see RFs
+@see RFile
+@see RRawDisk
+*/
+	{
+	/**
+	Any change, including mounting and unmounting drives.
+	*/
+	ENotifyAll=0x01,
+	/**
+	Addition or deletion of a directory entry, or changing or formatting a disk.
+	*/
+	ENotifyEntry=0x02,
+	/**
+	Change resulting from file requests:
+	RFile::Create(), RFile::Replace(), RFile::Rename(), RFs::Delete(),
+	RFs::Replace(), and RFs::Rename().
+	*/
+	ENotifyFile=0x04,
+	/**
+	Change resulting from directory requests:
+	RFs::MkDir(), RFs::RmDir(), and RFs::Rename().
+	*/
+	ENotifyDir=0x08,
+	/**
+	Change resulting from: RFs::SetEntry(), RFile::Set(), RFile::SetAtt(),
+	RFile::SetModified() and RFile::SetSize() requests.
+	*/
+	ENotifyAttributes=0x10,
+	/**
+	Change resulting from the RFile::Write() request.
+	*/
+	ENotifyWrite=0x20,
+	/**
+	Change resulting from the RRawDisk::Write() request.
+	*/
+	ENotifyDisk=0x40
+	};
+/**
+@publishedAll
+@released
+Notification modes for safe media removal notification API
+@see RFs::NotifyDismount
+*/
+enum TNotifyDismountMode
+	{
+	/** Used by a client to register for notification of pending dismount. This is the default behaviour for RFs::NotifyDismount*/
+	EFsDismountRegisterClient=0x01,
+	/**
+Used for graceful file system dismounting with notifying clients of a pending dismount.
+If all clients have responded by RFs::AllowDismount(), the file system will be dismounted.
+*/
+	EFsDismountNotifyClients=0x02,
+	/**  Used to forcibly dismount the file system without notifying clients. */
+	EFsDismountForceDismount=0x03,
+	};
+enum TFileCacheFlags
+/**
+@publishedAll
+@released
+Flags used to enable file server drive-specific caching
+*/
+	{
+	/**
+	Enable read caching - if file explicitly opened in EFileReadBuffered mode
+	*/
+	EFileCacheReadEnabled = 0x01,
+	/**
+	Enable read caching for all files, regardless of file open mode
+	*/
+	EFileCacheReadOn = 0x02,
+	/**
+	Enable read-ahead caching - if file explicitly opened in EFileReadAheadOn mode
+	*/
+	EFileCacheReadAheadEnabled = 0x04,
+	/**
+	Enable read-ahead caching, regardless of file open mode
+	*/
+	EFileCacheReadAheadOn = 0x08,
+	/**
+	Enable write caching, if file explicitly opened in EFileWriteBuffered mode
+	*/
+	EFileCacheWriteEnabled = 0x10,
+	/**
+	Enable write caching for all files, regardless of file open mode
+	*/
+	EFileCacheWriteOn = 0x20,
+	};
+/**
+@publishedAll
+@released
+Commands to query specific volume information.
+@see TVolumeIOParamInfo
+*/
+enum TQueryVolumeInfoExtCmd
+	{
+	/**
+Queries the sub type of the file system mounted on a specified volume.
+For example, FAT12, FAT16 or FAT32.
+*/
+EFileSystemSubType,
+/**
+Queries the I/O parameters of a specificed volume.
+This includes the block size, the cluster size and the recommended read and write sizes for the media.
+*/
+EIOParamInfo,
+/**
+This command determines whether the volume is synchronous or asynchronous.
+A boolean value is returned within the buffer defined as TPckgBuf<TBool>.
+ETrue for Synchronous and EFalse for Asynchronous.
+*/
+EIsDriveSync,
+/**
+Query if the given drive is finalised. See RFs::FinaliseDrive()
+Not all file systems may support this query.
+A boolean value is returned within the buffer defined as TPckgBuf<TBool>.
+ETrue value means that the drive is finalised
+*/
+EIsDriveFinalised,
+	};
+/**
+@publishedAll
+@released
+Volume IO parameter information.
+This class is used to return IO parameter information for a specified volume.
+The volume parameter information holds recommended buffer sizes for the creation of efficient buffers for
+reading and writing.
+@see RFs::VolumeIOParam()
+*/
+class TVolumeIOParamInfo
+	{
+public:
+	/**
+	The size of a block in bytes.
+	Reads and writes that are aligned on block boundaries are up to twice as fast as when
+	mis-aligned.
+	Read and write operations on certain underlying media is done in blocks.
+	A write operation that modifies only part of a block is less efficient, in general, than
+	one that modifies an entire block. Data throughput degrades linearly for reads and writes in smaller
+	sized units.
+	*/
+	TInt iBlockSize;
+	/**
+	The size in bytes of a single disk cluster.
+	Read and write operations that are aligned on cluster boundaries are more efficient.
+	The file system organises and allocates the file data on the disk in clusters where each cluster is
+	one or more blocks. Files that are not zero length occupy at least one cluster of the disk,
+	so large numbers of very small files use up more disk space than expected.
+	*/
+	TInt iClusterSize;
+	/**
+	The recommended buffer size for optimised reading performance.
+	The given buffer size is based on sensible benchmark testing results produced by the mobile device vendor.
+	The buffer size is then added to the estart.txt file
+	The figure is included in the estart.txt file along with the drive number and the variable name.
+	The example below shows the required format:
+	[DriveC]
+	RecReadBufSize 8192
+	When no value is provided, value KErrNotSupported is returned.
+	*/
+	TInt iRecReadBufSize;
+	/**
+	The recommended buffer size for optimised writing performance.
+	The given buffer size is based on sensible benchmark testing results produced by the mobile device vendor.
+	The buffer size is then added to the estart.txt file
+	The figure is included in the estart.txt file along with the drive number and the variable name.
+	The example below shows the required format:
+	[DriveC]
+	RecWriteBufSize 16384
+	When no value is provided, value KErrNotSupported is returned.
+	*/
+	TInt iRecWriteBufSize;
+/**
+The maximum file size that is supported by the file system mounted on this volume.
+Not all file system may provide this parameter;  The value KMaxTUint64 (0xffffffffffffffff) means that this particular file system hasn't
+provided this information.
+*/
+TUint64 iMaxSupportedFileSize;
+private:
+	/*
+	Reserved space for future use
+	*/
+	TInt iReserved[2];
+	};
+enum TDriveNumber
+/**
+@publishedAll
+@released
+The drive number enumeration.
+*/
+	{
+	EDriveA,   EDriveB,   EDriveC,   EDriveD,   EDriveE,
+	EDriveF,   EDriveG,   EDriveH,   EDriveI,   EDriveJ,
+	EDriveK,   EDriveL,   EDriveM,   EDriveN,   EDriveO,
+	EDriveP,   EDriveQ,   EDriveR,   EDriveS,   EDriveT,
+	EDriveU,   EDriveV,   EDriveW,   EDriveX,   EDriveY,
+	EDriveZ
+	};
+enum TEntryKey
+/**
+@publishedAll
+@released
+Flags indicating the order in which directory entries are to be sorted.
+@see RFs::GetDir
+@see CDirScan::SetScanDataL
+@see CDir::Sort
+*/
+	{
+	/**
+	The default; no sorting takes place
+	*/
+	ESortNone=0,
+	/**
+	Sort according to alphabetic order of file and directory name.
+This setting is mutually exclusive with ESortByExt, ESortBySize,
+ESortByDate and ESortByUid.
+	*/
+	ESortByName,
+	/**
+	Sort according to alphabetic order of file extension.
+	Files without an extension take precedence over files with an extension.
+	For files with the same extension or without an extension, the default is
+	to sort by name.
+This setting is mutually exclusive with ESortByName, ESortBySize,
+ESortByDate and ESortByUid.
+	*/
+	ESortByExt,
+	/**
+	Sort according to file size.
+This setting is mutually exclusive with ESortByName, ESortByExt,
+ESortByDate and ESortByUid.
+	*/
+	ESortBySize,
+	/**
+	Sort according to files' last modified time and date.
+	By default, most recent last.
+This setting is mutually exclusive with ESortByName, ESortByExt,
+ESortBySize and ESortByUid.
+	*/
+	ESortByDate,
+	/**
+	Sort according to file UID.
+This setting is mutually exclusive with ESortByName, ESortByExt,
+ESortBySize and ESortByDate.
+	*/
+	ESortByUid,
+	/**
+	Qualifies the sort order; if set, directories are listed in the order in
+	which they occur.
+	This is the default.
+This flag is mutually exclusive with EDirsFirst and EDirslast.
+	*/
+	EDirsAnyOrder=0,
+	/**
+	Qualifies the sort order; if set, directories come before files in sort order.
+This flag is mutually exclusive with EDirsAnyOrder and EDirsLast.
+	*/
+	EDirsFirst=0x100,
+	/**
+	Qualifies the sort order; if set, files come before directories in sort order.
+This flag is mutually exclusive with EDirsAnyOrder and EDirsFirst.
+	*/
+	EDirsLast=0x200,
+	/**
+	Qualifies the sort order; files are sorted in ascending order, i.e. from A to Z.
+	This is the default behaviour.
+This flag is mutually exclusive with EDescending and EDirDescending.
+	*/
+	EAscending=0,
+	/**
+	Qualifies the sort order; files are sorted in descending order, i.e. from Z to A.
+This flag is mutually exclusive with EAscending and EDirDescending.
+	*/
+	EDescending=0x400,
+	/**
+	Qualifies the sort order; directories are sorted in descending order, i.e. from Z to A.
+This flag shall be used in combination with either EDirsFirst or EDirsLast.
+This flag is mutually exclusive with EAscending and EDescending.
+	*/
+	EDirDescending=0x800
+	};
+enum TFileMode
+/**
+@publishedAll
+@released
+Access and share modes available when opening a file.
+The access mode indicates whether the file is opened just for reading or
+for writing.
+The share mode indicates whether other RFile objects can access the
+open file, and whether this access is read only.
+Use EFileShareReadersOrWriters if a client does not care whether the file has
+been previously opened for ReadOnly or Read/Write access.
+If EFileShareReadersOrWriters is not used, then a client needs to cooperate with
+other clients in order to open the file with the correct share mode, either
+EFileShareReadersOnly or EFileShareAny, depending on the share mode used when
+the file was originally opened.
+To open a file for reading and writing with read and write shared access,
+use:
+@code
+_LIT(KFilename, "filename.ext");
+RFile file;
+file.Open(theFs, KFilename, EFileShareAny|EFileWrite);
+@endcode
+If another instance of RFile tries to open this file in EFileShareExclusive
+or EFileShareReadersOnly mode, access is denied. However, it can be opened
+in EFileShareAny mode or EFileShareReadersOrWriters mode.
+If a file is opened with EFileShareReadersOrWriters, and the file is opened for
+sharing by another client, then the file share mode is promoted to the new share
+mode. When the file handle is closed then the share mode is demoted back to
+EFileShareReadersOrWriters.
+@code
+Table of FileShare promotion rules
+----------------------------------
+Client A					Client B							Resultant Share Mode
+--------					--------							--------------------
+ReadersOnly					ReadersOnly						ReadersOnly
+ReadersOnly					ReadersOrWriters|EFileRead			ReadersOnly
+ReadersOnly					ReadersOrWriters|EFileWrite		INCOMPATIBLE
+ReadersOnly					Any								INCOMPATIBLE
+ReadersOrWriters|EFileRead	ReadersOnly						ReadersOnly
+ReadersOrWriters|EFileRead	ReadersOrWriters|EFileRead		ReadersOrWriters
+ReadersOrWriters|EFileRead	ReadersOrWriters|EFileWrite		ReadersOrWriters
+ReadersOrWriters|EFileRead	Any								Any
+ReadersOrWriters|EFileWrite	ReadersOnly						INCOMPATIBLE
+ReadersOrWriters|EFileWrite	ReadersOrWriters|EFileRead			ReadersOrWriters
+ReadersOrWriters|EFileWrite	ReadersOrWriters|EFileWrite		ReadersOrWriters
+ReadersOrWriters|EFileWrite	Any								Any
+Any							ReadersOnly						INCOMPATIBLE
+Any							ReadersOrWriters|EFileRead			Any
+Any							ReadersOrWriters|EFileWrite		Any
+Any							Any								Any
+@endcode
+Use the following guidance notes for selecting FileShare mode with shared RFile objects:
+EFileShareAny
+- Use this mode to request both read and write access when another client needs
+to write to the file and respective client access to the file is coordinated.
+- To open a file for non-exclusive write, use EFileShareAny | EFileWrite.
+- It is recommended that either EFileShareAny or EFileShareAny | EFileRead are
+not used. These combinations will block users attempting to use the
+EFileShareReadersOnly mode even if all the EFileShareAny handles do not have
+the EFileWrite bit set as the EFileRead and EFileWrite bits have no affect on
+sharing. Use either EFileShareReadersOnly or EFileShareReadersOrWriters.
+EFileShareReadersOrWriters
+- Use this mode when it does not matter if another file writes to the file and
+file access can not be coordinated as other clients are unknown.
+- To open a file for shared read access whilst permitting writers, use
+EFileShareReadersOrWriters | EFileRead.
+- For write access with unrestricted share mode,
+EFileShareReadersOrWriters | EFileWrite may be used however
+EFilesShareAny | EFileWrite is preferred.
+EFileShareReadersOnly
+- Use this mode to get read access to the file and deny write access for any
+other handles on this file.
+- To open a file for shared read access whilst disallowing writers use
+EFileShareReadersOnly.
+Files may be opened in text or binary mode. Native Symbian OS application
+files are nearly all binary, (so they will usually be opened in binary mode).
+However, they can be opened in text mode (to support testing, and to make them
+compatible with text formats on remote systems).
+Symbian OS native text format uses CR-LF (ASCII 0x0d, 0x0a) to denote the end of
+a line. When reading, however, any combination of CR, LF, LF-CR or CR-LF is
+recognised as the end of a line. Where a remote file system uses a different
+format, it is the responsibility of the installable file system to present
+an interface for text files which conforms with this format.
+The share mode may be OR’ed with either EFileStream or EFileStreamText.
+Additionally, it may be OR’ed with either EFileRead or EFileWrite.
+*/
+	{
+	/**
+	Exclusive access for the program opening the file.
+	No other program can access the file until it is closed.
+If another program is already accessing the file in any share mode, then
+an attempt to open it with an EFileShareExclusive will fail.
+	*/
+	EFileShareExclusive,
+	/**
+	Read-only sharing.
+	This means that the file may only be accessed for reading.
+A file cannot be opened using a share mode of EFileShareReadersOnly with
+an EFileWrite flag.
+	*/
+	EFileShareReadersOnly,
+	/**
+	Shared access for reading and writing.
+	This means that other programs may share access to the file for reading
+	and writing with the program which opened the file.
+	When using this mode, the program is expecting another program to be able
+	to write to the file, so is not compatible with EFileShareReadersOnly.
+	*/
+	EFileShareAny,
+	/**
+	Shared access for reading and writing.
+	This means that other programs may share access to the file for reading
+	and writing with the program which opened the file.
+	When using this mode, the program does not care if another program has
+	the file open for read or write access.
+	*/
+	EFileShareReadersOrWriters,
+	/**
+	For files to be opened in binary mode.
+	*/
+	EFileStream=0,
+	/**
+	For files to be opened in text mode.
+	*/
+	EFileStreamText=0x100,
+	/**
+	The file may be read from but not written to.
+	*/
+	EFileRead=0,
+	/**
+	The file may be read from and written to
+	Cannot be combined with a share mode of EFileShareReadersOnly.
+	*/
+	EFileWrite=0x200,
+	/**
+	Specifies that an asynchronous read request should not be completed
+	until all requested data becomes available.
+	Cannot be combined with the EFileShareExclusive or EFileShareReadersOnly
+	share modes as this will prohibit a writer from updating the file.
+	*/
+	EFileReadAsyncAll=0x400,
+	/**
+	Enables write buffering
+	*/
+	EFileWriteBuffered	=0x00000800,
+	/**
+	Disables write buffering
+	*/
+	EFileWriteDirectIO	=0x00001000,
+	/**
+	Enables read buffering
+	*/
+	EFileReadBuffered	=0x00002000,
+	/**
+	Disables read buffering
+	*/
+	EFileReadDirectIO	=0x00004000,
+	/**
+	Enables read ahead.
+	*/
+	EFileReadAheadOn	=0x00008000,
+	/**
+	Disables read ahead.
+	*/
+	EFileReadAheadOff	=0x00010000,
+	/**
+	Enable delete on close
+	*/
+	EDeleteOnClose		=0x00020000,
+	/**
+	Enables operations on large files.
+	@internalTechnology
+	*/
+	EFileBigFile        =0x00040000
+	};
+/**
+@publishedAll
+@released
+Bit mask provided for retrieving a file's share mode.
+@see TFileMode
+*/
+const TUint KFileShareMask=0xff;
+enum TFormatMode
+/**
+@publishedAll
+@released
+The format method.
+*/
+	{
+	/**
+	Indicates a high density floppy disk to be formatted.
+	Obsolete.
+	Can be ORed with EFullFormat or EQuickFormat, but does not
+	have any effect.
+	*/
+	EHighDensity,
+/**
+Indicates a low density floppy disk to be formatted.
+	Obsolete.
+	Can be ORed with EFullFormat or EQuickFormat, but does not
+	have any effect.
+	*/
+	ELowDensity,
+	/**
+	Performs a full format, erasing whole media content and creating
+	new file system layout.
+	This is the default mode.
+	*/
+	EFullFormat=0,
+/**
+Performs a quick media format, erasing only required minimum media content.
+	For example, for FAT file system it resets FAT and root directory content.
+	Also preserves bad sectors if there are some on the volume.
+	*/
+	EQuickFormat=0x100,
+	/**
+	Indicates a custom formatting mode. In this mode some optional file system
+	specific parameters may be passed to RFormat::Open().
+	@see TLDFormatInfo
+	@see TInt RFormat::Open(RFs &aFs, const TDesC &aName, TUint aFormatMode, TInt &aCount, const TDesC8 &anInfo);
+	*/
+	ESpecialFormat=0x200,
+	/**
+	Forced erase of locked media
+	*/
+	EForceErase=0x400,
+/**
+This flag enables formatting the volume even if it has files or directories opened on it.
+If this flag is specified, the volume will be forcedly dismounted before performing media formatting.
+Even with this flag the RFormat::Open() can fail with KErrInUse in following cases:
+1. if there are clamped files on the volume.
+2. there are opened "disk access" objects, like RFormat or RRawDisk on the volume.
+*/
+EForceFormat = 0x800,
+	};
+enum TSeek
+/**
+@publishedAll
+@released
+Flags indicating the destination of a seek operation.
+File locations are specified as a 32-bit signed integer,
+allowing offsets of ?GB from the origin of the seek.
+@see RFile::Seek
+*/
+	{
+	/**
+	This can only be used for file systems with execute-in-place facilities,
+	such as the ROM file system: the offset specifies the absolute address of
+	the data.
+	*/
+	ESeekAddress,
+	/**
+	Destination is the start of file.
+	*/
+	ESeekStart,
+	/**
+	Destination is the current position in file.
+	*/
+	ESeekCurrent,
+	/**
+	Destination is the end of file.
+	*/
+	ESeekEnd
+	};
+/**
+@publishedAll
+@released
+*/
+class TBlockMapEntry : public TBlockMapEntryBase
+	{
+public:
+	IMPORT_C TBlockMapEntry();
+	IMPORT_C void SetNumberOfBlocks( TUint aNumberOfBlocks );
+	IMPORT_C void SetStartBlock( TUint aStartBlock );
+	};
+/**
+@publishedAll
+@released
+*/
+typedef TBuf8<KMaxMapsPerCall*sizeof(TBlockMapEntry)> TBlockArrayDes;
+struct SBlockMapInfo : public SBlockMapInfoBase
+	{
+	TBlockArrayDes iMap;
+	};
+/**
+@publishedAll
+@released
+*/
+enum TBlockMapUsage
+	{
+	/* */
+	EBlockMapUsagePaging,
+	/* */
+	ETestDebug
+	};
+class TEntry
+/**
+@publishedAll
+@released
+Encapsulates an entry in a directory, which can be another (nested) directory,
+a file or a volume label.
+Each directory entry has a name which is relative to its owning directory
+and a type, which is indicated by its unique identifier (UID).
+An entry can be interrogated for the following properties:
+1. the kind of entry: stored in the entry UIDs, stored in iType
+2. the entry attributes, stored in iAtt
+3. the size of entry
+4. the time the entry was last modified.
+@see RDir
+@see RFs::Entry
+@see RFs::SetEntry
+@see CfileBase::CurrentEntry
+*/
+	{
+public:
+	IMPORT_C TEntry();
+	IMPORT_C TEntry(const TEntry& aEntry);
+	IMPORT_C TEntry& operator=(const TEntry& aEntry);
+	IMPORT_C TBool IsReadOnly() const;
+	IMPORT_C TBool IsHidden() const;
+	IMPORT_C TBool IsSystem() const;
+	IMPORT_C TBool IsDir() const;
+	IMPORT_C TBool IsArchive() const;
+	inline const TUid& operator[](TInt anIndex) const;
+	inline TBool IsUidPresent(TUid aUid) const;
+	inline TBool IsTypeValid() const;
+	inline TUid MostDerivedUid() const;
+	IMPORT_C TInt64 FileSize() const;
+	inline void SetFileSize(TInt64 aFileSize);
+private:
+	inline void Copy(const TEntry& aEntry);
+	inline void Unpack();
+public:
+/**
+The individual bits within this byte indicate which attributes
+have been set.
+@see KEntryAttNormal
+	@see KEntryAttReadOnly
+	@see KEntryAttHidden
+@see KEntryAttSystem
+*/
+	TUint iAtt;
+/**
+The size of the file in bytes.
+For files larger that 2G it must be cast to TUint in order to avoid looking like negative signed.
+*/
+	TInt iSize;
+	/**
+	The local time of last modification.
+	*/
+	TTime iModified;
+	/**
+	The file's UIDtype
+	*/
+	TUidType iType;
+	/**
+	The name of the file relative to the owning directory,
+	with a maximum of KMaxFileName characters.
+	@see KMaxFileName
+	*/
+	TBufC<KMaxFileName> iName;
+private:
+	TUint32 iSizeHigh;
+	/**
+	Reserved for future expansion
+	*/
+	TUint32 iReserved;
+	};
+class RDir;
+class TEntryArray
+/**
+@publishedAll
+@released
+Array of directory entries.
+It contains the results of a call to RDir::Read(): it will contain all
+the TEntry items in the directory. Thus, a directory can be read in
+a single call, minimising client/server communication overheads.
+@see TEntry
+@see RDir::Read
+*/
+	{
+public:
+	IMPORT_C TEntryArray();
+	IMPORT_C TInt Count() const;
+	IMPORT_C const TEntry& operator[](TInt anIndex) const;
+private:
+	TInt iCount;
+	TInt iIndex;
+	const TEntry* iPos;
+	TBuf8<KEntryArraySize> iBuf;
+	friend class RDir;
+	friend class RFs;
+	friend class TRawEntryArray;
+	};
+class TDriveInfo
+/**
+@publishedAll
+@released
+Contains drive information.
+@see RFs::Drive
+*/
+	{
+public:
+/**
+The type of media mounted on the drive.
+*/
+	TMediaType iType;
+/**
+Indicates whether the drive supports a battery, and if so, its state.
+*/
+TBatteryState iBattery;
+/**
+The drive attributes.
+@see KDriveAttLocal
+@see KDriveAttRom
+@see KDriveAttRedirected
+@see KDriveAttSubsted
+@see KDriveAttInternal
+@see KDriveAttRemovable
+*/
+	TUint iDriveAtt;
+/**
+The attributes of the media mounted on the drive.
+@see KMediaAttVariableSize
+@see KMediaAttDualDensity
+@see KMediaAttFormattable
+@see KMediaAttWriteProtected
+@see KMediaAttLockable
+@see KMediaAttLocked
+*/
+	TUint iMediaAtt;
+private:
+	/**
+	Reserved for future expansion
+	*/
+	TUint32 iReserved;
+	};
+class TVolumeInfo
+/**
+@publishedAll
+@released
+Contains information about a volume mounted on a drive. Use RFs::Drive() if only
+the drive information is required.
+If a drive supports removable media it may contain different volumes over time.
+Volume information is made up of information concerning the drive on which it is mounted,
+which can also be accessed through RFs::Drive(), and the volume information, this is made
+up of the size of the volume, the free space, its unique identifying number and a name.
+TVolumeInfo is initialised by RFs::Volume().
+@see RFs::Volume()
+@see RFs::Drive()
+*/
+	{
+public:
+	IMPORT_C TVolumeInfo();
+	/**
+	Information about the drive on which the volume is mounted.
+	@see TDriveInfo
+	*/
+	TDriveInfo iDrive;
+	/**
+	The volume’s unique identifying number.
+	*/
+	TUint iUniqueID;
+	/**
+	The maximum size of the volume in bytes. The current amount of memory
+	in use plus the amount of free memory.
+	*/
+	TInt64 iSize;
+	/**
+	The amount of free space on the volume in bytes.
+	*/
+	TInt64 iFree;
+	/**
+	Name of the volume, with a maximum of KMaxFileName characters.
+	This field is optional.
+@see KMaxFileName
+	*/
+	TBufC<KMaxFileName> iName;
+	/**
+	Flags which define the default file-caching behaviour for this volume
+	@see TFileCacheFlags
+	*/
+	TFileCacheFlags iFileCacheFlags;
+/**
+@prototype
+@internalTechnology
+Internal flag, used in the case of non-blocking getting volume information.
+@see RFs::Volume(TVolumeInfo& aVol,TInt aDrive, TRequestStatus& aStat)
+If this flag is set, it means that the volume information will be obtained
+asynchronously. More specific, on return iFree will reflect the _current_ amount of free space on volume at the moment of
+RFs::Volume() call, not the exact final value. This is because in this case getting volume information will be asynchronous,
+and the client will not be suspended until the mount finish calculating free space. At present appicable to FAT32 file system only.
+*/
+TUint8 iVolSizeAsync : 1;
+private:
+	/**
+	Reserved for future expansion
+	*/
+TUint8  i8Reserved1;
+TUint16 i16Reserved1;
+TUint32 i32Reserved1;
+TUint32 i32Reserved2;
+	};
+class TDriveUnit
+/**
+@publishedAll
+@released
+Drive numbers and letters.
+A drive may be represented by either an integer between zero and twenty five
+inclusive, or by a buffer descriptor containing a character between "A" and "Z"
+inclusive, followed by a colon.
+This class encapsulates both representations.
+An instance of this class is constructed specifying either the drive number
+or the drive letter and may be converted between the two representations.
+*/
+	{
+public:
+	inline TDriveUnit() {};
+	IMPORT_C TDriveUnit(TInt aDrive);
+	IMPORT_C TDriveUnit(const TDesC& aDrive);
+	IMPORT_C TDriveUnit& operator=(TInt aDrive);
+	IMPORT_C TDriveUnit& operator=(const TDesC& aDrive);
+	inline operator TInt() const;
+	IMPORT_C TDriveName Name() const;
+private:
+	TInt iDrive;
+	};
+class RFs;
+//
+class TParseBase
+/**
+@publishedAll
+@released
+Base class for file name parsing.
+You first need to set up the path to be parsed using either a TParse, TParsePtr
+or TParsePtrC object.
+The interrogation and extraction functions in this class allow you to test
+whether a component has been specified in the pathname, and if so,
+to extract it. If a component is not present in the pathname,
+the extraction function returns an empty string.
+This class also allows directories to be added to, and popped from the path.
+Notes:
+1. the filename modification functions cannot be used by the TParsePtrC class.
+2. navigation using .. and . is not supported.
+@see TParse
+@see TParsePtr
+@see TParsePtrC
+*/
+	{
+private:
+	struct SField {TUint8 pos;TUint8 len;TUint8 present;TUint8 filler;};
+	enum TField {EDrive,EPath,EName,EExt,EMaxFields};
+	enum TWild {EWildName=0x01,EWildExt=0x02,EWildEither=0x04,EIsRoot=0x08,EWildIsKMatchOne=0x10,EWildIsKMatchAny=0x20};
+public:
+	IMPORT_C TParseBase();
+	IMPORT_C TInt PopDir();
+	IMPORT_C TInt AddDir(const TDesC& aName);
+	IMPORT_C const TDesC& FullName() const;
+	IMPORT_C TPtrC Drive() const;
+	IMPORT_C TPtrC Path() const;
+	IMPORT_C TPtrC DriveAndPath() const;
+	IMPORT_C TPtrC Name() const;
+	IMPORT_C TPtrC Ext() const;
+	IMPORT_C TPtrC NameAndExt() const;
+	IMPORT_C TBool DrivePresent() const;
+	IMPORT_C TBool PathPresent() const;
+	IMPORT_C TBool NamePresent() const;
+	IMPORT_C TBool ExtPresent() const;
+	IMPORT_C TBool NameOrExtPresent() const;
+	IMPORT_C TBool IsRoot() const;
+	IMPORT_C TBool IsWild() const;
+	IMPORT_C TBool IsKMatchOne() const;
+	IMPORT_C TBool IsKMatchAny() const;
+	IMPORT_C TBool IsNameWild() const;
+	IMPORT_C TBool IsExtWild() const;
+protected:
+	virtual TDes& NameBuf() = 0;                // Reference to derived class descriptor containing the filename.
+	virtual const TDesC& NameBufC() const = 0;  // const reference to derived class descriptor containing the filename.
+	TInt Set(const TDesC* aName,const TDesC* aRelated,const TDesC* aDefault,TBool allowWild);
+private:
+	TInt ParseDrive(TLex& aName,TBool& aDone);
+	TInt ParsePath(TLex& aName,TBool& aDone);
+	TInt ParseName(TLex& aName,TBool& aDone);
+	TInt ParseExt(TLex& aName,TBool& aDone);
+protected:
+	TInt16 iMod;        // Non-zero indicates File name modification functionality is enabled.
+private:
+	TInt16 iWild;
+	SField iField[EMaxFields];
+	};
+class TParsePtr : public TParseBase
+/**
+@publishedAll
+@released
+Parses filenames using less space on the stack than TParse.
+Stores a reference to a filename, unlike TParse, which uses
+a 512 byte TFileName object as an internal buffer to store
+a copy of the filename.
+The filename's components (drive, path, etc.) can be retrieved using
+the functions provided by the base class, TParseBase.
+This class should be used in preference to TParse when minimising stack
+usage is a priority.
+@see TParse
+@see TFileName
+*/
+	{
+public:
+	IMPORT_C TParsePtr(TDes& aName);
+protected:
+	IMPORT_C TDes& NameBuf();
+	IMPORT_C const TDesC& NameBufC() const;
+private:
+	TPtr iNameBuf;
+	};
+class TParsePtrC : public TParseBase
+/**
+@publishedAll
+@released
+Parses, but cannot modify, filenames using less space on the stack than TParse.
+Stores a reference to a filename, unlike TParse, which uses
+a 512 byte TFileName object as an internal buffer to store
+a copy of the filename.
+The filename's components (drive, path, etc.) can be retrieved using
+the functions provided by the base class, TParseBase.
+Note that because the filename cannot be modified through this class,
+the base class functions PopDir() and AddDir() cannot be called, because
+a panic will be raised.
+@see TParse
+@see TFileName
+*/
+	{
+public:
+	IMPORT_C TParsePtrC(const TDesC& aName);
+protected:
+	IMPORT_C TDes& NameBuf();
+	IMPORT_C const TDesC& NameBufC() const;
+private:
+	TPtrC iNameBuf;
+	};
+class TParse : public TParseBase
+/**
+@publishedAll
+@released
+Parses filenames.
+The class uses the full filename structure supported by Symbian OS.
+TParse works by using the Set() function to set up the filename to be parsed.
+Then, various getter functions defined in the base class, TParseBase, such as:
+FullName(), Drive(), Path(), DriveAndPath(), Name(), Ext() and NameAndExt()
+may be used to retrieve path components.
+There are a number of restrictions to valid path components, which are
+described in guide documentation.
+*/
+	{
+public:
+	IMPORT_C TParse();
+	IMPORT_C TInt Set(const TDesC& aName,const TDesC* aRelated,const TDesC* aDefault);
+	IMPORT_C TInt SetNoWild(const TDesC& aName,const TDesC* aRelated,const TDesC* aDefault);
+protected:
+	IMPORT_C TDes& NameBuf();
+	IMPORT_C const TDesC& NameBufC() const;
+private:
+	TFileName iNameBuf;
+	};
+class CDir : public CBase
+/**
+@publishedAll
+@released
+Array of directory entries that has been read into memory from the file system.
+It can be read and sorted by user programs, but cannot be created by them.
+*/
+	{
+public:
+	IMPORT_C virtual ~CDir();
+	IMPORT_C TInt Count() const;
+	IMPORT_C const TEntry& operator[](TInt anIndex) const;
+	IMPORT_C TInt Sort(TUint aEntrySortKey);
+protected:
+	IMPORT_C CDir();
+	IMPORT_C static CDir* NewL();
+	IMPORT_C void AddL(const TEntry& anEntry);
+	IMPORT_C void ExtractL(TBool aRemove,CDir*& aDir);
+	IMPORT_C void Compress();
+protected:
+	CArrayPakFlat<TEntry>* iArray;
+	friend class RFs;
+	friend class TOpenFileScan;
+	};
+#if defined SYMBIAN_PRIVATE_EFSRV
+	#define EFSRV_EXPORT_C
+	#define EFSRV_IMPORT_C
+#else
+	#define EFSRV_EXPORT_C EXPORT_C
+	#define EFSRV_IMPORT_C IMPORT_C
+#endif
+class RFs : public RSessionBase
+/**
+@publishedAll
+@released
+A handle to a file server session.
+A program or thread may have arbitrarily many sessions open simultaneously.
+Use this class for all file system manipulation, including:
+1. adding, removing, moving and renaming files and directories
+2. inspecting and changing file attributes and directory entry details.
+These include the time and date when the file or directory was last
+written to, its size and various attribute flags such as read-only,
+hidden, archive or system.
+3. finding a file’s real name; if the file system on which it is stored
+has to "mangle" the name into a shorter format
+4. getting directory listings
+5. maintaining a default path; unlike some other systems, there is a single
+system default path, rather than one for each drive: the default path
+consists of a drive and a path specification.
+6. performing context-sensitive parses using TParse objects, and
+the session path
+7. obtaining information on drives and volumes
+8. formatting and labelling volumes
+9. obtaining a list of valid drives
+10. emulating the DOS subst command, which allows any directory to appear
+as if it were a separate drive
+11. requesting notification of when significant change occurs.
+This can be used for programs which maintain file lists, but must
+update those lists when change occurs.
+12. finding the version number of the file server
+13. resource counting to ensure that all resources are closed when
+the session terminates.
+This class is not intended for user derivation.
+The following restrictions apply when a path is specified:
+1. its total length must not exceed 256 characters
+2. wildcards cannot be used in the drive or in any directory name,
+although they may be allowed in the filename and extension.
+3. double backslashes are not allowed in the path.
+4. the following characters must not be included anywhere in the path: < > " / |
+5. a colon may only be included between the drive and path
+6. no directory name or filename plus extension may consist solely
+of space characters, or of a single or double dot.
+7. spaces between the drive, if specified, and the first directory in
+the path are illegal, although there may be spaces between other
+path components, for instance between directories.
+*/
+	{
+public:
+	EFSRV_IMPORT_C TInt Connect(TInt aMessageSlots=KFileServerDefaultMessageSlots);
+	EFSRV_IMPORT_C void Close();
+	EFSRV_IMPORT_C TVersion Version() const;
+	EFSRV_IMPORT_C TInt AddFileSystem(const TDesC& aFileName) const;
+	EFSRV_IMPORT_C TInt MountFileSystem(const TDesC& aFileSystemName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt MountFileSystem(const TDesC& aFileSystemName,TInt aDrive, TBool aIsSync) const;
+	EFSRV_IMPORT_C TInt MountFileSystemAndScan(const TDesC& aFileSystemName,TInt aDrive,TBool& aIsMountSuccess) const;
+	EFSRV_IMPORT_C TInt MountFileSystem(const TDesC& aFileSystemName,const TDesC& aExtensionName,TInt aDrive);
+	EFSRV_IMPORT_C TInt MountFileSystem(const TDesC& aFileSystemName,const TDesC& aExtensionName,TInt aDrive, TBool aIsSync);
+	EFSRV_IMPORT_C TInt MountFileSystemAndScan(const TDesC& aFileSystemName,const TDesC& aExtensionName,TInt aDrive,TBool& aIsMountSuccess) const;
+	EFSRV_IMPORT_C TInt DismountFileSystem(const TDesC& aFileSystemName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt RemoveFileSystem(const TDesC& aFileSystemName) const;
+	EFSRV_IMPORT_C TInt FileSystemName(TDes& aName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt AddExtension(const TDesC& aFileName);
+	EFSRV_IMPORT_C TInt MountExtension(const TDesC& aExtensionName,TInt aDrive);
+	EFSRV_IMPORT_C TInt DismountExtension(const TDesC& aExtensionName,TInt aDrive);
+	EFSRV_IMPORT_C TInt RemoveExtension(const TDesC& aExtensionName);
+	EFSRV_IMPORT_C TInt ExtensionName(TDes& aExtensionName,TInt aDrive,TInt aPos);
+	EFSRV_IMPORT_C TInt RemountDrive(TInt aDrive,const TDesC8* aMountInfo=NULL,TUint aFlags=0);
+	EFSRV_IMPORT_C void NotifyChange(TNotifyType aType,TRequestStatus& aStat);
+	EFSRV_IMPORT_C void NotifyChange(TNotifyType aType,TRequestStatus& aStat,const TDesC& aPathName);
+	EFSRV_IMPORT_C void NotifyChangeCancel();
+	EFSRV_IMPORT_C void NotifyChangeCancel(TRequestStatus& aStat);
+	EFSRV_IMPORT_C void NotifyDiskSpace(TInt64 aThreshold,TInt aDrive,TRequestStatus& aStat);
+	EFSRV_IMPORT_C void NotifyDiskSpaceCancel(TRequestStatus& aStat);
+	EFSRV_IMPORT_C void NotifyDiskSpaceCancel();
+	EFSRV_IMPORT_C TInt DriveList(TDriveList& aList) const;
+	EFSRV_IMPORT_C TInt DriveList(TDriveList& aList, TUint aFlags) const;
+	EFSRV_IMPORT_C TInt Drive(TDriveInfo& anInfo,TInt aDrive=KDefaultDrive) const;
+EFSRV_IMPORT_C TInt Volume(TVolumeInfo& aVol,TInt aDrive=KDefaultDrive) const;
+EFSRV_IMPORT_C void Volume(TVolumeInfo& aVol,TInt aDrive, TRequestStatus& aStat) const;
+	EFSRV_IMPORT_C TInt SetVolumeLabel(const TDesC& aName,TInt aDrive=KDefaultDrive);
+	EFSRV_IMPORT_C TInt Subst(TDes& aPath,TInt aDrive=KDefaultDrive) const;
+	EFSRV_IMPORT_C TInt SetSubst(const TDesC& aPath,TInt aDrive=KDefaultDrive);
+	EFSRV_IMPORT_C TInt RealName(const TDesC& aName,TDes& aResult) const;
+EFSRV_IMPORT_C TInt GetMediaSerialNumber(TMediaSerialNumber& aSerialNum, TInt aDrive);
+	EFSRV_IMPORT_C TInt SessionPath(TDes& aPath) const;
+	EFSRV_IMPORT_C TInt SetSessionPath(const TDesC& aPath);
+	EFSRV_IMPORT_C TInt Parse(const TDesC& aName,TParse& aParse) const;
+	EFSRV_IMPORT_C TInt Parse(const TDesC& aName,const TDesC& aRelated,TParse& aParse) const;
+	EFSRV_IMPORT_C TInt MkDir(const TDesC& aPath);
+	EFSRV_IMPORT_C TInt MkDirAll(const TDesC& aPath);
+	EFSRV_IMPORT_C TInt RmDir(const TDesC& aPath);
+	EFSRV_IMPORT_C TInt GetDir(const TDesC& aName,TUint anEntryAttMask,TUint anEntrySortKey,CDir*& anEntryList) const;
+	EFSRV_IMPORT_C TInt GetDir(const TDesC& aName,TUint anEntryAttMask,TUint anEntrySortKey,CDir*& anEntryList,CDir*& aDirList) const;
+	EFSRV_IMPORT_C TInt GetDir(const TDesC& aName,const TUidType& anEntryUid,TUint anEntrySortKey,CDir*& aFileList) const;
+	EFSRV_IMPORT_C TInt Delete(const TDesC& aName);
+	EFSRV_IMPORT_C TInt Rename(const TDesC& anOldName,const TDesC& aNewName);
+	EFSRV_IMPORT_C TInt Replace(const TDesC& anOldName,const TDesC& aNewName);
+	EFSRV_IMPORT_C TInt Att(const TDesC& aName,TUint& aAttValue) const;
+	EFSRV_IMPORT_C TInt SetAtt(const TDesC& aName,TUint aSetAttMask,TUint aClearAttMask);
+	EFSRV_IMPORT_C TInt Modified(const TDesC& aName,TTime& aTime) const;
+	EFSRV_IMPORT_C TInt SetModified(const TDesC& aName,const TTime& aTime);
+	EFSRV_IMPORT_C TInt Entry(const TDesC& aName,TEntry& anEntry) const;
+	EFSRV_IMPORT_C TInt SetEntry(const TDesC& aName,const TTime& aTime,TUint aSetAttMask,TUint aClearAttMask);
+private:
+	EFSRV_IMPORT_C TInt ReadFileSection_RESERVED(const TDesC& aName,TInt aPos,TDes8& aDes,TInt aLength) const;
+public:
+	EFSRV_IMPORT_C static TBool IsValidDrive(TInt aDrive);
+	EFSRV_IMPORT_C static TInt CharToDrive(TChar aChar,TInt& aDrive);
+	EFSRV_IMPORT_C static TInt DriveToChar(TInt aDrive,TChar& aChar);
+	EFSRV_IMPORT_C static TBool IsRomAddress(TAny* aAny);
+	EFSRV_IMPORT_C static TDriveNumber GetSystemDrive();
+	EFSRV_IMPORT_C static TChar GetSystemDriveChar();
+	EFSRV_IMPORT_C TInt SetSystemDrive(TDriveNumber aSystemDrive);
+	EFSRV_IMPORT_C void ResourceCountMarkStart() const;
+	EFSRV_IMPORT_C void ResourceCountMarkEnd() const;
+	EFSRV_IMPORT_C TInt ResourceCount() const;
+	EFSRV_IMPORT_C TInt IsFileOpen(const TDesC& aFile,TBool& anAnswer) const;
+	EFSRV_IMPORT_C TInt CheckDisk(const TDesC& aDrive) const;
+	EFSRV_IMPORT_C TInt ScanDrive(const TDesC& aDrive) const;
+	EFSRV_IMPORT_C TInt GetShortName(const TDesC& aLongName,TDes& aShortName) const;
+	EFSRV_IMPORT_C TInt GetLongName(const TDesC& aShortName,TDes& aLongName) const;
+	EFSRV_IMPORT_C TBool GetNotifyUser();
+	EFSRV_IMPORT_C void SetNotifyUser(TBool aValue);
+	EFSRV_IMPORT_C TUint8* IsFileInRom(const TDesC& aFileName) const;
+	EFSRV_IMPORT_C TBool IsValidName(const TDesC& anEntryName) const;
+	EFSRV_IMPORT_C TBool IsValidName(const TDesC& aFileName,TText& aBadChar) const;
+	EFSRV_IMPORT_C TInt GetDriveName(TInt aDrive,TDes& aDriveName) const;
+	EFSRV_IMPORT_C TInt SetDriveName(TInt aDrive,const TDesC& aDriveName);
+	EFSRV_IMPORT_C TInt LoaderHeapFunction(TInt aFunction, TAny *aArg1=NULL, TAny *aArg2=NULL);
+	IMPORT_C TInt SetErrorCondition(TInt anError,TInt aCount=0);
+	EFSRV_IMPORT_C TInt SetDebugRegister(TInt aVal);
+	EFSRV_IMPORT_C TInt SetAllocFailure(TInt aAllocNum);
+	EFSRV_IMPORT_C void DebugNotify(TInt aDrive,TUint aNotifyType,TRequestStatus& aStat);
+	EFSRV_IMPORT_C TInt ControlIo(TInt aDrive,TInt aCommand);
+	EFSRV_IMPORT_C TInt ControlIo(TInt aDrive,TInt aCommand,TDes8& aParam1);
+	EFSRV_IMPORT_C TInt ControlIo(TInt aDrive,TInt aCommand,TDes8& aParam1,TDes8& aParam2);
+	EFSRV_IMPORT_C TInt ControlIo(TInt aDrive,TInt aCommand,TAny* aParam1,TAny* aParam2);
+	EFSRV_IMPORT_C TInt LockDrive(TInt aDrv, const TMediaPassword &aOld, const TMediaPassword &aNew, TBool aStr);
+	EFSRV_IMPORT_C TInt UnlockDrive(TInt aDrv, const TMediaPassword &Pswd, TBool aStr);
+	EFSRV_IMPORT_C TInt ClearPassword(TInt aDrv, const TMediaPassword &aPswd);
+	EFSRV_IMPORT_C TInt ErasePassword(TInt aDrv);
+	EFSRV_IMPORT_C TInt SetSessionToPrivate(TInt aDrive);
+	EFSRV_IMPORT_C TInt PrivatePath(TDes& aPath);
+	EFSRV_IMPORT_C TInt CreatePrivatePath(TInt aDrive);
+	EFSRV_IMPORT_C void StartupInitComplete(TRequestStatus& aStat);
+	EFSRV_IMPORT_C TInt SetLocalDriveMapping(const TDesC8& aMapping);
+	EFSRV_IMPORT_C TInt FinaliseDrives();
+/** specifies drive finalisation modes */
+enum TFinaliseDrvMode
+{
+EFinal_RW,      ///< after successful finalisation the drive remains writable and will become "not finalised" after the first write operation.
+EFinal_RO,      ///< after successful finalisation the drive becomes read-only
+EForceUnfinalise///< @internalComponent  mark the drive as "not finalised" can result in KErrAbort if the dive is in inconsistent state.
+};
+EFSRV_IMPORT_C TInt FinaliseDrive(TInt aDriveNo, TFinaliseDrvMode aMode) const;
+	EFSRV_IMPORT_C TInt SwapFileSystem(const TDesC& aOldFileSystemName,const TDesC& aNewFileSystemName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt ReserveDriveSpace(TInt aDriveNo, TInt aSpace);
+	EFSRV_IMPORT_C TInt GetReserveAccess(TInt aDriveNo);
+	EFSRV_IMPORT_C TInt ReleaseReserveAccess(TInt aDriveNo);
+	EFSRV_IMPORT_C TInt AddPlugin(const TDesC& aFileName) const;
+	EFSRV_IMPORT_C TInt RemovePlugin(const TDesC& aPluginName) const;
+	EFSRV_IMPORT_C TInt PluginName(TDes& aPluginName,TInt aDrive,TInt aPos);
+	EFSRV_IMPORT_C TInt MountPlugin(const TDesC& aPluginName) const;
+	EFSRV_IMPORT_C TInt MountPlugin(const TDesC& aPluginName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt MountPlugin(const TDesC& aPluginName,TInt aDrive, TInt aPos) const;
+	EFSRV_IMPORT_C TInt DismountPlugin(const TDesC& aPluginName) const;
+	EFSRV_IMPORT_C TInt DismountPlugin(const TDesC& aPluginName,TInt aDrive) const;
+	EFSRV_IMPORT_C TInt DismountPlugin(const TDesC& aPluginName,TInt aDrive,TInt aPos) const;
+	EFSRV_IMPORT_C void NotifyDismount(TInt aDrive, TRequestStatus& aStat, TNotifyDismountMode aMode=EFsDismountRegisterClient) const;
+	EFSRV_IMPORT_C void NotifyDismountCancel(TRequestStatus& aStat) const;
+	EFSRV_IMPORT_C void NotifyDismountCancel() const;
+	EFSRV_IMPORT_C TInt AllowDismount(TInt aDrive) const;
+EFSRV_IMPORT_C TInt SetStartupConfiguration(TInt aCommand,TAny* aParam1,TAny* aParam2) const;
+	EFSRV_IMPORT_C TInt AddCompositeMount(const TDesC& aFileSystemName,TInt aLocalDriveToMount,TInt aCompositeDrive, TBool aSync) const;
+	EFSRV_IMPORT_C TInt SetNotifyChange(TBool aNotifyChange);
+	EFSRV_IMPORT_C TInt QueryVolumeInfoExt(TInt aDrive, TQueryVolumeInfoExtCmd aCommand, TDes8& aInfo) const;
+	EFSRV_IMPORT_C TInt VolumeIOParam(TInt aDriveNo, TVolumeIOParamInfo& aParamInfo) const;
+	EFSRV_IMPORT_C TInt FileSystemSubType(TInt aDriveNo, TDes& aName) const;
+	EFSRV_IMPORT_C TInt InitialisePropertiesFile(const TPtrC8& aPtr) const;
+	IMPORT_C TInt AddProxyDrive(const TDesC& aFileName);
+	IMPORT_C TInt RemoveProxyDrive(const TDesC& aDriveName);
+	template <class T0,class T1> inline TInt MountProxyDrive(const TUint aDrive, const TDesC& aName, T0 a0, T1 a1)
+		{ return(DoMountProxyDrive(TIpcArgs(aDrive, &aName, a0, a1))); };
+	IMPORT_C TInt DismountProxyDrive(const TUint aDrive);
+	TInt Unclamp(const RFileClamp& aHandle);
+	EFSRV_IMPORT_C TInt ReadFileSection(const TDesC& aName,TInt64 aPos,TDes8& aDes,TInt aLength) const;
+/**
+	This class is used to for returning meaningful error code values to users of RFs::IsValidName(const TDesC& ,TNameValidParam& )
+	@see TError
+	*/
+	class TNameValidParam
+		{
+		public:
+			/** Initialises the members of the class. By default iUseSessionPath is set to EFalse, however one could set it to ETrue.*/
+			inline TNameValidParam(TBool aUseSessionPath = EFalse);
+		/** possible error codes */
+		enum TError
+			{
+			ErrNone,            ///< no error.
+			ErrBadCharacter,    ///< aName contains a bad character; and its position is in iInvalidCharPos.
+			ErrBadName,         ///< aName isn't a valid file or directory name.
+			ErrNameTooLong      ///< aName length or aName + session path length (see iUseSessionPath) is longer than 256 characters.
+			};
+		inline TError ErrorCode() const;
+		inline void   UseSessionPath(TBool aUseSessionPath);
+		inline TUint  InvalidCharPos() const;
+		friend class TFsIsValidName;
+		private:
+			TError iError;          ///< the reason why aName is invalid, see TError
+			TBool  iUseSessionPath; ///< if ETrue, and if aName isn't fully specified, missing parts will be taken from the session path
+			TUint  iInvalidCharPos; ///< may contain invalid character position if error is ErrBadCharacter,else 0.
+		};
+	EFSRV_IMPORT_C TBool IsValidName(const TDesC& aName, TNameValidParam& aParam );
+/** Special enumerator values for the SupportedFileSystemName() API */
+enum
+{
+KRootFileSystem  = 0x00800000,  ///< specifies "root" file system. The result will be the same as for FileSystemName() API call
+KFirstChildFileSystem = 0       ///< specifies the first child file system number, the second will be KFirstChildFileSystem+1 etc.
+};
+EFSRV_IMPORT_C TInt SupportedFileSystemName(TDes& aName, TInt aDrive, TInt aFsEnumerator) const;
+protected:
+	TInt SendReceive(TInt aFunction,const TIpcArgs& aArgs) const;
+private:
+	void GetDirL(const TDesC& aMatchName,TUint anEntryAttMask,TUint anEntrySortKey,CDir*& anEntryList,CDir*& aDirList,RDir& aDir) const;
+	void GetDirL(const TDesC& aMatchName,TUint anEntryAttMask,TUint anEntrySortKey,CDir*& anEntryList,RDir& aDir) const;
+	void GetDirL(const TDesC& aMatchName,const TUidType& aUidType,TUint anEntrySortKey,CDir*& anEntryList,RDir& aDir) const;
+	void DoGetDirL(TUint anEntrySortKey,CDir*& anEntryList,RDir& aDir) const;
+	TInt GetOpenFileList(TInt& aSessionNum,TInt& aLocalPos,TThreadId& aThreadId,TEntryArray& anArray) const;
+	IMPORT_C TInt DoMountProxyDrive(const TIpcArgs& ipcArgs);
+	friend class TOpenFileScan;
+	friend class RFsPlugin;
+	};
+//-------------------------------------------------------------------------------------------------------------------
+/**
+Base class for volume formatting parameters. This class package buffer, TVolFormatParamBuf or
+packaged buffer of the derived class can be passed to the RFormat::Open() in order to provide
+file system-specific formatting parameters.
+Each file system that supports such formatting parameters shall have this class specialisation (e.g. TVolFormatParam_FAT)
+All classes, derived from this one must have the same size as the base class.
+In order to use formatting parameters the format mode shall have ESpecialFormat bit flag set.
+@see    RFormat::Open(RFs&,const TDesC&,TUint,TInt& ,const TDesC8& anInfo);
+@see    TVolFormatParamBuf
+@publishedAll
+@released
+*/
+class TVolFormatParam
+{
+public:
+inline TVolFormatParam();
+inline void Init();
+inline void SetFileSystemName(const TDesC& aFsName);
+static inline TUint32 CalcFSNameHash(const TDesC& aFsName);
+inline TUint32 FSNameHash() const;
+inline TBool SomeParamsSet() const;
+protected:
+enum {KMaxDataSlots = 64}; ///< the size of data array iData
+inline void SetVal(TUint aIndex, TUint32 aVal);
+inline TUint32 GetVal(TUint aIndex) const;
+public:
+enum {KUId = 0x820116A2}; ///< this value shell be in iUid field to identify this class object
+/**
+This class tree UID. Used to distinguish the object of this class from TLDFormatInfo and other possible data structures.
+For this and derived classes this field must be KUId. This field offset in the class must be 0
+*/
+const TUint32 iUId;
+private:
+TUint32 iFSysNameHash;          ///< Up-cased file system name hash (crc32) used to designate the file system. 0 means "not set"
+TBool   iParamsSet : 1;         ///< ETrue if any parameter was set (SetVal() called). Gets reset to EFalse by Init()
+TUint32 iData[KMaxDataSlots];   ///< used as a pool for various data. The derived classes are free to use it by SetVal()/GetVal()
+};
+__ASSERT_COMPILE(_FOFF(TVolFormatParam, iUId) == 0);
+__ASSERT_COMPILE(sizeof(TVolFormatParam) != sizeof(TLDFormatInfo));
+/** package buffer for the objects of class TVolFormatParamBuf */
+typedef TPckgBuf<TVolFormatParam> TVolFormatParamBuf;
+#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+/**
+@publishedAll
+@released
+Creates and opens a file, and performs all operations on a single open file.
+These include:
+- reading from and writing to the file
+- seeking to a position within the file
+- locking and unlocking within the file
+- setting file attributes
+Before using any of these services, a connection to a file server session must
+have been made, and the file must be open.
+Opening Files:
+-  use Open() to open an existing file for reading or writing; an error is
+returned if it does not already exist.
+To open an existing file for reading only, use Open() with an access mode of
+EFileRead, and a share mode of EFileShareReadersOnly.
+-  use Create() to create and open a new file for writing; an error is returned
+if it already exists.
+-  use Replace() to open a file for writing, replacing any existing file of
+the same name if one exists, or creating a new file if one does not exist.
+Note that if a file exists, its length is reset to zero.
+-  use Temp() to create and open a temporary file with a unique name,
+for writing and reading.
+When opening a file, you must specify the file server session to use for
+operations with that file. If you do not close the file explicitly, it is
+closed when the server session associated with it is closed.
+Reading and Writing:
+There are several variants of both Read() and Write().
+The basic Read(TDes8& aDes) and Write(const TDesC8& aDes) are supplemented
+by variants allowing the descriptor length to be overridden, or the seek
+position of the first byte to be specified, or asynchronous completion,
+or any combination.
+Reading transfers data from a file to a descriptor, and writing transfers
+data from a descriptor to a file. In all cases, the file data is treated
+as binary and byte descriptors are used (TDes8, TDesC8).
+@see TDes8
+@see TDesC8
+*/
+#else
+/**
+@publishedAll
+@released
+Creates and opens a file, and performs all operations on a single open file.
+These include:
+- reading from and writing to the file
+- seeking to a position within the file
+- locking and unlocking within the file
+- setting file attributes
+Before using any of these services, a connection to a file server session must
+have been made, and the file must be open.
+Opening Files:
+-  use Open() to open an existing file for reading or writing; an error is
+returned if it does not already exist.
+To open an existing file for reading only, use Open() with an access mode of
+EFileRead, and a share mode of EFileShareReadersOnly.
+-  use Create() to create and open a new file for writing; an error is returned
+if it already exists.
+-  use Replace() to open a file for writing, replacing any existing file of
+the same name if one exists, or creating a new file if one does not exist.
+Note that if a file exists, its length is reset to zero.
+-  use Temp() to create and open a temporary file with a unique name,
+for writing and reading.
+When opening a file, you must specify the file server session to use for
+operations with that file. If you do not close the file explicitly, it is
+closed when the server session associated with it is closed.
+Reading and Writing:
+There are several variants of both Read() and Write().
+The basic Read(TDes8& aDes) and Write(const TDesC8& aDes) are supplemented
+by variants allowing the descriptor length to be overridden, or the seek
+position of the first byte to be specified, or asynchronous completion,
+or any combination.
+Reading transfers data from a file to a descriptor, and writing transfers
+data from a descriptor to a file. In all cases, the file data is treated
+as binary and byte descriptors are used (TDes8, TDesC8).
+RFile class supports operations on files of size less than or equal to 2GB - 1.
+If the file size is greater than 2GB - 1 (large file), use of class RFile64 is
+recommended for following operations:
+	1. Opening a large file
+	2. Creating a file which can grow beyond 2GB - 1 by size
+	3. Creating a temporary file which can grow beyond 2GB - 1 by size
+	4. Replacing an existing file after which it can grow beyond 2GB - 1 by size
+	5. Adopting a large file handle from client
+	6. Adopting a large file handle from server
+	7. Adopting a large file handle from another process
+	8. Read from a position greater than 2GB - 1
+	9. Writing to a file by which the size can grow beyond 2GB - 1
+	10. Seek to a position greater than 2GB - 1
+	11. Setting a size greater than 2GB - 1
+	12. Querying the file size (greater than 2GB - 1)
+	13. Locking and unlocking a position and length that is beyond 2GB - 1
+@see TDes8
+@see TDesC8
+@see RFile64
+*/
+#endif
+class RFile : public RSubSessionBase
+	{
+public:
+	EFSRV_IMPORT_C TInt Open(RFs& aFs,const TDesC& aName,TUint aFileMode);
+	EFSRV_IMPORT_C void Close();
+	EFSRV_IMPORT_C TInt Create(RFs& aFs,const TDesC& aName,TUint aFileMode);
+	EFSRV_IMPORT_C TInt Replace(RFs& aFs,const TDesC& aName,TUint aFileMode);
+	EFSRV_IMPORT_C TInt Temp(RFs& aFs,const TDesC& aPath,TFileName& aName,TUint aFileMode);
+	EFSRV_IMPORT_C TInt Read(TDes8& aDes) const;
+	EFSRV_IMPORT_C void Read(TDes8& aDes,TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C TInt Read(TDes8& aDes,TInt aLength) const;
+	EFSRV_IMPORT_C void Read(TDes8& aDes,TInt aLength,TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C TInt Read(TInt aPos,TDes8& aDes) const;
+	EFSRV_IMPORT_C void Read(TInt aPos,TDes8& aDes,TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C TInt Read(TInt aPos,TDes8& aDes,TInt aLength) const;
+	EFSRV_IMPORT_C void Read(TInt aPos,TDes8& aDes,TInt aLength,TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C void ReadCancel(TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C void ReadCancel() const;
+	EFSRV_IMPORT_C TInt Write(const TDesC8& aDes);
+	EFSRV_IMPORT_C void Write(const TDesC8& aDes,TRequestStatus& aStatus);
+	EFSRV_IMPORT_C TInt Write(const TDesC8& aDes,TInt aLength);
+	EFSRV_IMPORT_C void Write(const TDesC8& aDes,TInt aLength,TRequestStatus& aStatus);
+	EFSRV_IMPORT_C TInt Write(TInt aPos,const TDesC8& aDes);
+	EFSRV_IMPORT_C void Write(TInt aPos,const TDesC8& aDes,TRequestStatus& aStatus);
+	EFSRV_IMPORT_C TInt Write(TInt aPos,const TDesC8& aDes,TInt aLength);
+	EFSRV_IMPORT_C void Write(TInt aPos,const TDesC8& aDes,TInt aLength,TRequestStatus& aStatus);
+	EFSRV_IMPORT_C TInt Lock(TInt aPos,TInt aLength) const;
+	EFSRV_IMPORT_C TInt UnLock(TInt aPos,TInt aLength) const;
+	EFSRV_IMPORT_C TInt Seek(TSeek aMode,TInt& aPos) const;
+	EFSRV_IMPORT_C TInt Flush();
+	EFSRV_IMPORT_C void Flush(TRequestStatus& aStatus);
+	EFSRV_IMPORT_C TInt Size(TInt& aSize) const;
+	EFSRV_IMPORT_C TInt SetSize(TInt aSize);
+	EFSRV_IMPORT_C TInt Att(TUint& aAttValue) const;
+	EFSRV_IMPORT_C TInt SetAtt(TUint aSetAttMask,TUint aClearAttMask);
+	EFSRV_IMPORT_C TInt Modified(TTime& aTime) const;
+	EFSRV_IMPORT_C TInt SetModified(const TTime& aTime);
+	EFSRV_IMPORT_C TInt Set(const TTime& aTime,TUint aSetAttMask,TUint aClearAttMask);
+	EFSRV_IMPORT_C TInt ChangeMode(TFileMode aNewMode);
+	EFSRV_IMPORT_C TInt Rename(const TDesC& aNewName);
+	EFSRV_IMPORT_C TInt Drive(TInt &aDriveNumber, TDriveInfo &aDriveInfo) const;
+	EFSRV_IMPORT_C TInt Adopt(RFs& aFs, TInt aHandle);
+	EFSRV_IMPORT_C TInt AdoptFromClient(const RMessage2& aMsg, TInt aFsHandleIndex, TInt aFileHandleIndex);
+	EFSRV_IMPORT_C TInt AdoptFromServer(TInt aFsHandle, TInt aFileHandle);
+	EFSRV_IMPORT_C TInt AdoptFromCreator(TInt aFsIndex, TInt aFileHandleIndex);
+	EFSRV_IMPORT_C TInt Name(TDes& aName) const;
+	EFSRV_IMPORT_C TInt TransferToServer(TIpcArgs& aIpcArgs, TInt aFsHandleIndex, TInt aFileHandleIndex) const;
+	EFSRV_IMPORT_C TInt TransferToClient(const RMessage2& aMsg, TInt aFileHandleIndex) const;
+	EFSRV_IMPORT_C TInt TransferToProcess(RProcess& aProcess, TInt aFsHandleIndex, TInt aFileHandleIndex) const;
+	EFSRV_IMPORT_C TInt Duplicate(const RFile& aFile, TOwnerType aType=EOwnerProcess);
+	EFSRV_IMPORT_C TInt FullName(TDes& aName) const;
+	EFSRV_IMPORT_C TInt BlockMap(SBlockMapInfo& aInfo, TInt64& aStartPos, TInt64 aEndPos=-1, TInt aBlockMapusage=EBlockMapUsagePaging) const;
+	TInt Clamp(RFileClamp& aHandle);
+protected:
+	// RSubSessionBase overrides
+	TInt CreateSubSession(const RSessionBase& aSession,TInt aFunction,const TIpcArgs& aArgs);
+	void CloseSubSession(TInt aFunction);
+	TInt SendReceive(TInt aFunction,const TIpcArgs& aArgs) const;
+	TInt DuplicateHandle(TInt& aSubSessionHandle) const;
+	friend class RFilePlugin;
+	};
+#ifdef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+#include <f32file64.h>
+#endif
+class RDir : public RSubSessionBase
+/**
+@publishedAll
+@released
+Reads the entries contained in a directory.
+You must first open the directory, specifying an attribute mask which is used
+by Read() calls to filter the entry types required. Then, use one of
+the Read() functions to read the filtered entries. When the operation
+is complete, the directory should be closed using Close()
+There are two types of Read(): one works with a single entry at a time,
+requiring programs to iterate through the entries explicitly.
+The other works with an entire TEntryArray, allowing multiple entries to be
+read in one call.
+As well as making application program logic somewhat simpler, this type
+uses fewer calls to the server, and is more efficient.
+Each type of Read() can be performed either synchronously or asynchronously.
+It may be more convenient to use RFs::GetDir() than the Read() calls supported
+by this class.
+RFs::GetDir() has the advantage that it allows a directory’s entries to be
+sorted in various ways.
+However, it does not provide asynchronous as well as synchronous variants
+and does not allow entries to be read individually.
+@see RFs
+*/
+	{
+public:
+	EFSRV_IMPORT_C TInt Open(RFs& aFs,const TDesC& aMatchName,const TUidType& aUidType);
+	EFSRV_IMPORT_C TInt Open(RFs& aFs,const TDesC& aMatchName,TUint anAttMask);
+	EFSRV_IMPORT_C void Close();
+	EFSRV_IMPORT_C TInt Read(TEntryArray& anArray) const;
+	EFSRV_IMPORT_C void Read(TEntryArray& anArray,TRequestStatus& aStatus) const;
+	EFSRV_IMPORT_C TInt Read(TEntry& anEntry) const;
+	EFSRV_IMPORT_C void Read(TPckg<TEntry>& anEntry,TRequestStatus& aStatus) const;
+private:
+	// RSubSessionBase overrides
+	TInt SendReceive(TInt aFunction,const TIpcArgs& aArgs) const;
+	friend class RDirPlugin;
+	};
+class RFormat : public RSubSessionBase
+/**
+@publishedAll
+@released
+Formats a device, one step at a time.
+RFormat must first be opened on a device before formatting each
+track using Next().
+There is also an asynchronous version of Next() which, if encapsulated into
+a suitable active object, can be used to implement a
+user-interruptible formatting process.
+*/
+	{
+public:
+	IMPORT_C TInt Open(RFs& aFs,const TDesC& aName,TUint aFormatMode,TInt& aCount);
+	IMPORT_C TInt Open(RFs& aFs,const TDesC& aName,TUint aFormatMode,TInt& aCount,const TDesC8& anInfo);
+	IMPORT_C void Close();
+	IMPORT_C TInt Next(TInt& aStep);
+	IMPORT_C void Next(TPckgBuf<TInt>& aStep,TRequestStatus& aStatus);
+	};
+class RRawDisk : public RSubSessionBase
+/**
+@publishedAll
+@released
+Enables direct disk access.
+No other resources can access the disk while direct access to it is in effect.
+This class is not intended for user derivation.
+*/
+	{
+public:
+	IMPORT_C TInt Open(RFs& aFs,TInt aDrive);
+	IMPORT_C void Close();
+	IMPORT_C TInt Read(TInt64 aPos,TDes8& aDes);
+	IMPORT_C TInt Write(TInt64 aPos,TDesC8& aDes);
+private:
+	TInt iDrive;
+	};
+class CDirStack;
+NONSHARABLE_CLASS(CDirScan) : public CBase
+/**
+@publishedAll
+@released
+Scans a directory structure.
+The scan moves from directory to directory through the hierarchy, returning
+a list of the entries contained in each. The order in which the directories
+are scanned is determined by a sort key which is specified when setting up
+the scan. The base directory to be scanned and the entry types of interest
+must also be specified before performing the scan.
+This class is not intended for user derivation
+*/
+{
+public:
+/**
+Defines the scan direction.
+*/
+	enum TScanDirection
+		{
+		/**
+		Scan upwards from the lowest level directory in the hierarchy to
+		the top level directory.
+		*/
+		EScanUpTree,
+		/**
+		Scan downwards from the top level directory in the hierarchy to
+		the bottom level directory.
+		*/
+		EScanDownTree
+		};
+public:
+	IMPORT_C static CDirScan* NewL(RFs& aFs);
+	IMPORT_C static CDirScan* NewLC(RFs& aFs);
+	IMPORT_C ~CDirScan();
+	IMPORT_C void SetScanDataL(const TDesC& aMatchName,TUint anEntryAttMask,TUint anEntrySortMask,TScanDirection aScanDir=EScanDownTree);
+	IMPORT_C void NextL(CDir*& aDirEntries);
+	IMPORT_C TPtrC AbbreviatedPath();
+	IMPORT_C TPtrC FullPath();
+protected:
+	CDirScan(RFs& aFs);
+private:
+	inline RFs& Fs();
+	void UpdateAbbreviatedPath();
+	void ScanUpTreeL(CDir*& aDirEntries);
+	void ScanDownTreeL(CDir*& aDirEntries);
+	void GetDirEntriesL(CDir*& aDirEntries);
+private:
+	RFs* const iFs;
+	TParse iFullPath;
+	TPtrC iAbbreviatedPath;
+	TInt iAbbreviatedPathPos;
+	TUint iEntryAttMask;
+	TUint iEntrySortMask;
+	TBool iScanning;
+	TScanDirection iScanDir;
+	CDirStack* iStack;
+	};
+enum TFileManError
+/**
+@publishedAll
+@released
+A list of CFileMan error codes.
+@see CFileMan
+*/
+	{
+	/**
+	No additional error information is available, either because
+	the latest CFileMan operation did not return an error, or if it did,
+	the error was not one for which additional information is available.
+	*/
+	ENoExtraInformation,
+	/**
+	A leave occurred while setting up the initial scan.
+	This indicates that the operation did not begin.
+	@see CDirScan.
+*/
+	EInitializationFailed,
+	/**
+	A leave occurred while scanning the next directory in the course of a file
+	management function.
+	This indicates that the operation did begin.
+	@see CDirScan.
+	*/
+	EScanNextDirectoryFailed,
+	/**
+	Error occurred when attempting to open the source file for a file copy
+	or move.
+	*/
+	ESrcOpenFailed,
+	/**
+	Error occurred while attempting to create, or, if overwriting is in effect,
+	replace the target file for a file copy or move.
+	*/
+	ETrgOpenFailed,
+	/**
+	The operation completed without processing any files because no matching
+	files were found.
+	*/
+	ENoFilesProcessed
+	};
+class MFileManObserver
+/**
+@publishedAll
+@released
+Provides notification of the progress of synchronous or asynchronous
+file management operations.
+It should be inherited by classes which implement this protocol.
+The enquiry functions provided by CFileBase and CFileMan may be used by
+the observer to display information about the progress of the operation
+such as error messages, the names of the target and destination files,
+and the number of bytes transferred during a copy operation.
+Notification may take place before or after an entry has been processed,
+or during a file copy or move.
+Each notification function returns a value which can be used to enable
+the user to control the progress of the operation, for example to cancel
+a long-running multiple file copy.
+To use this class, pass a pointer to an instance of the class to
+the CFileMan constructor, or use SetObserver(), defined in CFileBase.
+*/
+	{
+public:
+/**
+Control for the current CFileMan operation.
+*/
+	enum TControl
+		{
+		/**
+		Proceed with the current or the next entry.
+		*/
+		EContinue,
+		/**
+		Retry processing the previous entry.
+		*/
+		ERetry,
+		/**
+		Abort operation, causes function to return KErrCancel.
+		*/
+		EAbort,
+		/**
+		Cancel processing the current entry.
+		*/
+		ECancel
+		};
+public:
+	IMPORT_C virtual TControl NotifyFileManStarted();
+	IMPORT_C virtual TControl NotifyFileManOperation();
+	IMPORT_C virtual TControl NotifyFileManEnded();
+	};
+class CFileBase : public CBase
+/**
+@publishedAll
+@released
+Abstract base class for file management.
+It provides functions to set an observer for the derived class
+CFileMan, and to get information about the entry being processed.
+@see CFileMan
+*/
+	{
+public:
+	IMPORT_C void SetObserver(MFileManObserver* anObserver);
+public:
+	IMPORT_C const TEntry& CurrentEntry();
+	IMPORT_C TPtrC AbbreviatedPath();
+	IMPORT_C TPtrC FullPath();
+	IMPORT_C TInt GetLastError();
+	IMPORT_C TFileManError GetMoreInfoAboutError();
+protected:
+	IMPORT_C CFileBase(RFs& anFs);
+	IMPORT_C void ConstructL();
+	IMPORT_C ~CFileBase();
+	IMPORT_C void RunL();
+	IMPORT_C void RunInSeparateThreadL(TThreadFunction aThreadFunction);
+// virtual
+/**
+Called from RunL to perform tidy up after an operation.
+@see CFileMan
+@see CFileBase::RunL
+*/
+	virtual void CompleteOperationL() {};
+//pure virtual
+	/**
+	Called from RunL to perform the requested operation.
+	@see CFileMan
+	@see CFileBase::RunL
+	*/
+	virtual void DoOperationL() = 0;
+protected:
+	RFs iFs;
+	RFs iFsOld;
+	RThread iFManThread;
+	RSemaphore iSynchronizer;
+	CDirScan* iScanner;
+	CDir* iDirList;
+	TInt iCurrentEntry;
+	TUint iMatchEntry;
+	TUint iSwitches;
+	TParse iSrcFile;
+	MFileManObserver* iObserver;
+	TInt iLastError;
+	TFileManError iErrorInfo;
+	TRequestStatus* iStatus;
+	HBufC* iSessionPath;
+	TInt iNumberOfFilesProcessed;
+friend void DoFManBaseOperationL(TAny* aPtr);
+friend TInt FManBaseThreadFunction(TAny* aPtr);
+	};
+NONSHARABLE_CLASS(CFileMan) : public CFileBase
+/**
+@publishedAll
+@released
+Offers file management services which accept the use of wildcards;
+synchronous and asynchronous.
+It also provides enquiry functions, which, like those provided by
+the base class CFileBase, may be used by an observer class object
+to provide the user with information about the progress of the operation.
+All of the file management functions provided by this class accept the use of
+wildcards, and may operate either synchronously or asynchronously.
+When CFileMan is operating asynchronously, the operation takes place in
+a separate thread from the calling code.
+A file notification observer (an instance of a class deriving
+from MFileManObserver) may optionally be used by CFileMan when operating
+synchronously or asynchronously. If provided, the appropriate notification
+function is called before or after each entry has been processed,
+or during a file copy or move.
+This notification can be used to provide information about the state of
+the operation, such as the number of bytes transferred during a
+large-scale file copy. It can also be used to allow the user to cancel,
+retry or continue processing an entry, or to abort the whole operation.
+If such notification is required, specify an object deriving from
+MFileManObserver class in the constructor, or call SetObserver(),
+defined in the base class, CFileBase.
+All of the file manipulation functions except Rename() may operate recursively,
+and all can operate non-recursively. When operating recursively,
+these functions will act on all matching files located throughout
+the source directory’s hierarchy. When operating non-recursively,
+these functions act upon files contained in the single top level source
+directory only. Recursion is set or unset using the switch parameter to
+these functions.
+This class is not intended for user derivation.
+Note:
+To support wildcard, CFileMan needs to store the entire directory entry
+information. Therefore, in a extreme condition, if a directory contains
+a huge number of files (e.g. more than 15000 files with 10 characters' long file
+names), user may encounter KErrNoMemory errors. Developers who have a need to handle
+this rare case should increase the heap size limitation of their applications.
+For more information about heap size configuration, please refer following
+section in Symbian Developer Library:
+Symbian OS build guide >> Build Tools Reference >> MMP file syntax >> epocheapsize
+@see MFileManObserver
+*/
+	{
+public:
+/**
+An enumeration that identifies CFileMan tasks. This enumeration is used
+by CurrentAction() to identify which task currently being carried out.
+	@see CFileMan::CurrentAction
+*/
+	enum TAction
+		{
+		/**
+		Inactive
+		*/
+		ENone,
+		/**
+		Setting attributes
+		*/
+		EAttribs,
+		/**
+		Copying files
+		*/
+		ECopy,
+		/**
+		Deleting files
+		*/
+		EDelete,
+		/**
+		Moving files
+		*/
+		EMove,
+		/**
+		Renaming files
+		*/
+		ERename,
+		/**
+		Deleting a directory and all contents
+		*/
+		ERmDir,
+		/**
+		Renaming component to VFAT short name (guaranteed to be unique)
+		*/
+		ERenameInvalidEntry,
+		/**
+		Copying file from open file handle
+		*/
+		ECopyFromHandle,
+		};
+	/**
+	Overwriting and recursion switch.
+	Used in CFileMan functions to set whether operations are applied to
+	the specified directory and all directories below it, or
+	the specified directory only.
+	*/
+	enum TSwitch
+		{
+		/**
+		Any files in the destination directory that have the same name as
+		the source files in a rename, move or copy operation, will
+		be overwritten.
+		*/
+		EOverWrite=1,
+		/**
+		Recursive operation.
+		*/
+		ERecurse=2
+		};
+public:
+	IMPORT_C static CFileMan* NewL(RFs& aFs);
+	IMPORT_C static CFileMan* NewL(RFs& aFs,MFileManObserver* anObserver);
+	~CFileMan();
+	IMPORT_C TAction CurrentAction();
+	IMPORT_C void GetCurrentTarget(TFileName& aFile);
+	IMPORT_C void GetCurrentSource(TFileName& aFile);
+	IMPORT_C TInt BytesTransferredByCopyStep();
+public:
+	IMPORT_C TInt Attribs(const TDesC& aName,TUint aSetMask,TUint aClearMask,const TTime& aTime,TUint aSwitch=0);
+	IMPORT_C TInt Attribs(const TDesC& aName,TUint aSetMask,TUint aClearMask,const TTime& aTime,TUint aSwitch,TRequestStatus& aStatus);
+	IMPORT_C TInt Copy(const TDesC& anOld,const TDesC& aNew,TUint aSwitch=EOverWrite);
+	IMPORT_C TInt Copy(const TDesC& anOld,const TDesC& aNew,TUint aSwitch,TRequestStatus& aStatus);
+	IMPORT_C TInt Delete(const TDesC& aName,TUint aSwitch=0);
+	IMPORT_C TInt Delete(const TDesC& aName,TUint aSwitch,TRequestStatus& aStatus);
+	IMPORT_C TInt Move(const TDesC& anOld,const TDesC& aNew,TUint aSwitch=EOverWrite);
+	IMPORT_C TInt Move(const TDesC& anOld,const TDesC& aNew,TUint aSwitch,TRequestStatus& aStatus);
+	IMPORT_C TInt Rename(const TDesC& anOld,const TDesC& aNew,TUint aSwitch=EOverWrite);
+	IMPORT_C TInt Rename(const TDesC& anOld,const TDesC& aNew,TUint aSwitch,TRequestStatus& aStatus);
+	IMPORT_C TInt RmDir(const TDesC& aDirName);
+	IMPORT_C TInt RmDir(const TDesC& aDirName,TRequestStatus& aStatus);
+	IMPORT_C TInt Copy(const RFile& anOld,const TDesC& aNew,TUint aSwitches=EOverWrite);
+	IMPORT_C TInt Copy(const RFile& anOld,const TDesC& aNew,TUint aSwitches,TRequestStatus& aStatus);
+protected:
+	CFileMan(RFs& aFs);
+	TInt RenameInvalidEntry(const TDesC& anOld,const TDesC& aNew,TUint aSwitch=EOverWrite);
+private:
+	/**
+	This is an internal enumeration for CFileMan implementation.
+	THis enumeration is mapped into TAction when user wants to identify the current
+	task of CFileMan by CurrentAction().
+	@see CFileMan::TAction
+	@see CFileMan::CurrentAction
+*/
+	enum TInternalAction
+		{
+		/**
+		Internal indicator for None operation.
+		This is mapped to CFileMan::ENone.
+		*/
+		EInternalNone,
+		/**
+		Internal indicator for Attribs() operation.
+		This is mapped to CFileMan::EAttribs.
+		*/
+		EInternalAttribs,
+		/**
+		Internal indicator for Copy() operation.
+		This is mapped to CFileMan::ECopy.
+		*/
+		EInternalCopy,
+		/**
+		Internal indicator for Delete() operation.
+		This is mapped to CFileMan::EDelete.
+		*/
+		EInternalDelete,
+		/**
+		Internal indicator for Move() operation on different drives.
+		This is mapped to CFileMan::Move.
+		*/
+		EInternalCopyForMove,
+		/**
+		Internal indicator for Move() operation on the same drive.
+		This is mapped to CFileMan::Rename.
+		Note for compatibility reasons, it is not mapped to CFileMan::Move.
+		*/
+		EInternalRenameForMove,
+		/**
+		Internal indicator for Rename() operation.
+		This is mapped to CFileMan::ERename.
+		*/
+		EInternalRename,
+		/**
+		Internal indicator for RmDir() operation.
+		This is mapped to CFileMan::ERmDir.
+		*/
+		EInternalRmDir,
+		/**
+		Internal indicator for RenameInvalidEntry() operation.
+		This is mapped to CFileMan::ERenameInvalidEntry.
+		*/
+		EInternalRenameInvalidEntry,
+		/**
+		Internal indicator for CopyFromHandle() operation.
+		This is mapped to CFileMan::ECopyFromHandle.
+		*/
+		EInternalCopyFromHandle,
+		};
+	void CompleteOperationL();
+	void DoOperationL();
+	void CheckForDirectory();
+	void SetFlags(TBool aOverWrite,TBool aRecurse,TBool aScanDirection,TBool aMoveRename);
+	void GetSrcAndTrg(TParse& aSrcName,TFileName& aTrgName);
+	void DoSynchronize(TInt aRetVal);
+	TInt CheckRenameAllowed(const TDesC& aSrcName,const TDesC& aTrgName);
+	TInt SetupMoveOnSameDrive(TUint aSwitches, TBool& aComplete);
+	TInt SetupMoveAcrossDrives(TUint aSwitches);
+	TInt SetupTargetDirectory(TBool aOverWrite, TBool& aComplete);
+	TBool SrcTrgDrivesIdentical();
+	TInt SetupDirectoryForMove(TBool& aSrcIsDir);
+private:
+	void DoAttribsL();
+	void DoCopyOrMoveL();
+	void DoDeleteL();
+	void DoRenameL();
+	void DoRmDirL();
+	void DoCopyFromHandleL();
+#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+	TInt DoCopy(const RFile& aSrcFile, RFile& aDstFile, TInt& aRet);
+#else
+	TInt DoCopy(const RFile64& aSrcFile, RFile64& aDstFile, TInt& aRet);
+#endif
+private:
+	TParse iTrgFile;
+	TInternalAction iAction;
+	TUint iSetMask;
+	TUint iClearMask;
+	TTime iTime;
+	TInt iBytesTransferred;
+#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+	RFile iSrcFileHandle;
+#else
+	RFile64 iSrcFileHandle;
+#endif
+	TBool iMovingContents;
+	TEntry iTmpEntry;
+	TParse iTmpParse;
+	TFileName iTmpName1;
+	TFileName iTmpName2;
+friend void RenameInvalidEntryL(RFs& aFs,TParse& aSrcFile);
+	};
+class TFindFile
+/**
+@publishedAll
+@released
+Searches for files and directories.
+Each function has a variant which searches for multiple files/directories,
+using one or more wildcard characters in the filename.
+If an initial search is successful, further searches can be carried out
+using Find() or FindWild().
+You can also retrieve the fully qualified file specification,
+and manipulate and interrogate it using the TParse class (or related classes).
+Note that when specifying the path of a directory to search, the path should
+always end with a backslash character.When trailing backslash is not present
+then it is considered as file. And path will be taken till last backslash.
+The client must have appropriate capabilities for the directory to be searched.
+For example without ALL FILES Capability, it is not possible to successfully
+find any files under \sys\bin directory.
+By default if the file is not found in the current drive the rest of the drives,
+excluding the remote ones, will be searched. Using function SetFindMask it is
+possible to specify a combination of drive attributes(aMask) that the drives to
+be searched must match.
+*/
+	{
+public:
+	IMPORT_C TFindFile(RFs& aFs);
+	IMPORT_C TInt FindByPath(const TDesC& aFileName,const TDesC* aPathList);
+	IMPORT_C TInt FindByDir(const TDesC& aFileName,const TDesC& aDirPath);
+	IMPORT_C TInt Find();
+	IMPORT_C TInt FindWildByPath(const TDesC& aFileName,const TDesC* aPathList,CDir*& aDirList);
+	IMPORT_C TInt FindWildByDir(const TDesC& aFileName,const TDesC& aDirPath,CDir*& aDir);
+	IMPORT_C TInt FindWild(CDir*& aDirList);
+	IMPORT_C TInt SetFindMask(TUint aMask);
+	inline const TDesC& File() const;
+private:
+	TInt DoFind();
+	TInt DoFindByPath(const TDesC& aFileName,const TDesC* aPathList);
+	TInt DoFindByDir(const TDesC& aFileName,const TDesC& aDir);
+	TInt DoFindInDir();
+	TInt DoFindNextInPath();
+	TInt DoFindNextInDriveList();
+private:
+	RFs* const iFs;
+	TParse iFile;
+	TInt iPathPos;
+	TInt iCurrentDrive;
+	TInt iMode;
+	const TDesC* iPath;
+	TDriveList iDrvList;
+	CDir** iDir;
+	TUint32 iMatchMask;
+	};
+/**
+@publishedAll
+@released
+Contains a list of entries for the files which were opened in
+a file server session.
+@see CDir
+*/
+typedef CDir CFileList;
+class TOpenFileScan
+/**
+@publishedAll
+@released
+Scans open files to get a list of the entries for all files which are currently
+open in a particular file server session.
+NextL() creates a list of the files opened by the session.
+The ID of the thread which opened the files listed may be obtained by calling ThreadId().
+If multiple sessions are in use, repeatedly calling NextL() will return a list
+of open files in each session.
+*/
+	{
+public:
+	IMPORT_C TOpenFileScan(RFs& aFs);
+	IMPORT_C void NextL(CFileList*& aFileList);
+	IMPORT_C TThreadId ThreadId() const;
+private:
+	RFs* iFs;
+	TThreadId iThreadId;
+	TInt iScanPos;
+	TInt iEntryListPos;
+	};
+class TFileText
+/**
+@publishedAll
+@released
+Reads and writes single lines of text to or from a Unicode file.
+*/
+	{
+private:
+	enum TFileState
+		{
+		EStartOfFile,
+		ENormal,
+		EReverse
+		};
+public:
+	IMPORT_C TFileText();
+	IMPORT_C void Set(RFile& aFile);
+	IMPORT_C TInt Read(TDes& aDes);
+	IMPORT_C TInt Write(const TDesC& aDes);
+	IMPORT_C TInt Seek(TSeek aMode);
+private:
+	void NextRecord();
+	TInt CheckForTerminator(TBool& anAnswer);
+	TInt FillBuffer();
+private:
+	const TText* iNext;
+	const TText* iEnd;
+	TFileState iState;
+#ifndef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+	RFile iFile;
+#else
+	RFile64 iFile;
+#endif
+	TBuf8<0x100> iReadBuf;
+	};
+/**
+@publishedAll
+@released
+*/
+IMPORT_C TBool FileNamesIdentical(const TDesC& aFileName1,const TDesC& aFileName2);
+/**
+@publishedAll
+@released
+The UID of the File Server process
+*/
+const TInt KFileServerUidValue = 0x100039e3;
+#include <f32file.inl>
+#ifdef SYMBIAN_ENABLE_64_BIT_FILE_SERVER_API
+#include <f32file64.inl>
+#endif
+#ifdef SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION
+#include <f32notification.h>
+#endif
+#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS
+#include <f32file_private.h>
+#endif
+#endif

changeset 9	96e5fb8b040d
child 10	36bfc973b146