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# QFSFileEngine Class Reference
[QtCore module]

The QFSFileEngine class implements Qt's default file engine. More...

Inherits QAbstractFileEngine.

### Methods

- __init__ (self)
- __init__ (self, QString file)
- bool caseSensitive (self)
- bool close (self)
- bool copy (self, QString newName)
- QStringList entryList (self, QDir.Filters filters, QStringList filterNames)
- QAbstractFileEngine.FileFlags fileFlags (self, QAbstractFileEngine.FileFlags type)
- QString fileName (self, QAbstractFileEngine.FileName file)
- QDateTime fileTime (self, QAbstractFileEngine.FileTime time)
- bool flush (self)
- int handle (self)
- bool isRelativePath (self)
- bool isSequential (self)
- bool link (self, QString newName)
- bool mkdir (self, QString dirName, bool createParentDirectories)
- bool open (self, QIODevice.OpenMode openMode)
- bool open (self, QIODevice.OpenMode openMode, int fd, QFile.FileHandleFlags handleFlags)
- bool open (self, QIODevice.OpenMode flags, int fd)
- QString owner (self, QAbstractFileEngine.FileOwner)
- int ownerId (self, QAbstractFileEngine.FileOwner)
- int pos (self)
- str read (self, int maxlen)
- str readLine (self, int maxlen)
- bool remove (self)
- bool rename (self, QString newName)
- bool rmdir (self, QString dirName, bool recurseParentDirectories)
- bool seek (self, int)
- setFileName (self, QString file)
- bool setPermissions (self, int perms)
- bool setSize (self, int size)
- int size (self)
- int write (self, str data)

### Static Methods

- QString currentPath (QString fileName = QString())
- list-of-QFileInfo drives ()
- QString homePath ()
- QString rootPath ()
- bool setCurrentPath (QString path)
- QString tempPath ()

## Detailed Description

The QFSFileEngine class implements Qt's default file engine.

This class is part of the file engine framework in Qt. If you only want to access files or directories, use QFile, QFileInfo or QDir instead.

QFSFileEngine is the default file engine for accessing regular files. It is provided for convenience; by subclassing this class, you can alter its behavior slightly, without having to write a complete QAbstractFileEngine subclass. To install your custom file engine, you must also subclass QAbstractFileEngineHandler and create an instance of your handler.

It can also be useful to create a QFSFileEngine object directly if you need to use the local file system inside QAbstractFileEngine.create(), in order to avoid recursion (as higher-level classes tend to call QAbstractFileEngine.create()).

## Method Documentation

### QFSFileEngine.__init__ (self)

Constructs a QFSFileEngine.

### QFSFileEngine.__init__ (self, QString file)

Constructs a QFSFileEngine for the file name file.

### bool QFSFileEngine.caseSensitive (self)

Reimplemented from QAbstractFileEngine.caseSensitive().

Returns true for Windows, false for Unix.

### bool QFSFileEngine.close (self)

Reimplemented from QAbstractFileEngine.close().

### bool QFSFileEngine.copy (self, QString newName)

Reimplemented from QAbstractFileEngine.copy().

For windows, copy the file to file copyName.

Not implemented for Unix.

### QString QFSFileEngine.currentPath (QString fileName = QString())

For Unix, returns the current working directory for the file engine.

For Windows, returns the canonicalized form of the current path used by the file engine for the drive specified by fileName. On Windows, each drive has its own current directory, so a different path is returned for file names that include different drive names (e.g. A: or C:).

See also setCurrentPath().

### list-of-QFileInfo QFSFileEngine.drives ()

For Windows, returns the list of drives in the file system as a list of QFileInfo objects. On unix, Mac OS X and Windows CE, only the root path is returned. On Windows, this function returns all drives (A:, C:, D:, etc.).

For Unix, the list contains just the root path "/".

### QStringList QFSFileEngine.entryList (self, QDir.Filters filters, QStringList filterNames)

### QAbstractFileEngine.FileFlags QFSFileEngine.fileFlags (self, QAbstractFileEngine.FileFlags type)

Reimplemented from QAbstractFileEngine.fileFlags().

### QString QFSFileEngine.fileName (self, QAbstractFileEngine.FileName file)

Reimplemented from QAbstractFileEngine.fileName().

See also setFileName().

### QDateTime QFSFileEngine.fileTime (self, QAbstractFileEngine.FileTime time)

Reimplemented from QAbstractFileEngine.fileTime().

### bool QFSFileEngine.flush (self)

Reimplemented from QAbstractFileEngine.flush().

### int QFSFileEngine.handle (self)

Reimplemented from QAbstractFileEngine.handle().

### QString QFSFileEngine.homePath ()

Returns the home path of the current user.

See also rootPath().

### bool QFSFileEngine.isRelativePath (self)

Reimplemented from QAbstractFileEngine.isRelativePath().

### bool QFSFileEngine.isSequential (self)

Reimplemented from QAbstractFileEngine.isSequential().

### bool QFSFileEngine.link (self, QString newName)

Reimplemented from QAbstractFileEngine.link().

Creates a link from the file currently specified by fileName() to newName. What a link is depends on the underlying filesystem (be it a shortcut on Windows or a symbolic link on Unix). Returns true if successful; otherwise returns false.

### bool QFSFileEngine.mkdir (self, QString dirName, bool createParentDirectories)

Reimplemented from QAbstractFileEngine.mkdir().

### bool QFSFileEngine.open (self, QIODevice.OpenMode openMode)

Reimplemented from QAbstractFileEngine.open().

### bool QFSFileEngine.open (self, QIODevice.OpenMode openMode, int fd, QFile.FileHandleFlags handleFlags)

Opens the file handle fh in openMode mode. Returns true on success; otherwise returns false.

### bool QFSFileEngine.open (self, QIODevice.OpenMode flags, int fd)

Opens the file descriptor fd in openMode mode. Returns true on success; otherwise returns false.

### QString QFSFileEngine.owner (self, QAbstractFileEngine.FileOwner)

Reimplemented from QAbstractFileEngine.owner().

### int QFSFileEngine.ownerId (self, QAbstractFileEngine.FileOwner)

Reimplemented from QAbstractFileEngine.ownerId().

In Unix, if stat() is successful, the `uid` is returned if own is the owner. Otherwise the `gid` is returned. If stat() is unsuccessful, -2 is reuturned.

For Windows, -2 is always returned.

### int QFSFileEngine.pos (self)

Reimplemented from QAbstractFileEngine.pos().

### str QFSFileEngine.read (self, int maxlen)

Reimplemented from QAbstractFileEngine.read().

### str QFSFileEngine.readLine (self, int maxlen)

Reimplemented from QAbstractFileEngine.readLine().

### bool QFSFileEngine.remove (self)

Reimplemented from QAbstractFileEngine.remove().

### bool QFSFileEngine.rename (self, QString newName)

Reimplemented from QAbstractFileEngine.rename().

### bool QFSFileEngine.rmdir (self, QString dirName, bool recurseParentDirectories)

Reimplemented from QAbstractFileEngine.rmdir().

### QString QFSFileEngine.rootPath ()

Returns the root path.

See also homePath().

### bool QFSFileEngine.seek (self, int)

Reimplemented from QAbstractFileEngine.seek().

### bool QFSFileEngine.setCurrentPath (QString path)

Sets the current path (e.g., for QDir), to path. Returns true if the new path exists; otherwise this function does nothing, and returns false.

See also currentPath().

### QFSFileEngine.setFileName (self, QString file)

Reimplemented from QAbstractFileEngine.setFileName().

See also fileName().

### bool QFSFileEngine.setPermissions (self, int perms)

Reimplemented from QAbstractFileEngine.setPermissions().

### bool QFSFileEngine.setSize (self, int size)

Reimplemented from QAbstractFileEngine.setSize().

See also size().

### int QFSFileEngine.size (self)

Reimplemented from QAbstractFileEngine.size().

See also setSize().

### QString QFSFileEngine.tempPath ()

Returns the temporary path (i.e., a path in which it is safe to store temporary files).

### int QFSFileEngine.write (self, str data)

Reimplemented from QAbstractFileEngine.write().