moss.fs
Class MFileSystem

java.lang.Object
  moss.fs.MFileSystem

public class MFileSystem
extends java.lang.Object

this class handles file-system management. This is used to re-direct I/O requests to the right driver, etc.

Constructor Summary

MFileSystem()

Method Summary

static int	access(java.lang.String path, int amode) tests for access to a file
static void	finalinit() called to perform final initialisation (in the context of the init-task)
static void	init_filesystem() initialises the file-system bits
static int	mkdir(java.lang.String path, int flags) creates a directory in the file-system
static int	mount(java.lang.String path, java.lang.String fstype, java.lang.String[] options) mounts a file-system
static int	open(java.lang.String path, MFile handle, int flags, int mode) opens a file
static int	opendir(java.lang.String path, MFile handle) opens a directory
static int	stat(java.lang.String path, MInode statbuf) stats a file/directory
static int	umount(java.lang.String path) unmounts a file-system
static int	unlink(java.lang.String path) unlinks (removes) a file or directory

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MFileSystem

public MFileSystem()

Method Detail

init_filesystem

public static void init_filesystem()

initialises the file-system bits

finalinit

public static void finalinit()

called to perform final initialisation (in the context of the init-task)

mount

public static int mount(java.lang.String path,
                        java.lang.String fstype,
                        java.lang.String[] options)

mounts a file-system

Parameters:

path - absolute path

fstype - file-system type

options - file-system specific options

Returns:

0 on success, < 0 on failure

umount

public static int umount(java.lang.String path)

unmounts a file-system

Parameters:

path - absolute path to the mounted file-system

Returns:

0 on success, or <0 indicating error

open

public static int open(java.lang.String path,
                       MFile handle,
                       int flags,
                       int mode)

opens a file

Parameters:

path - absolute path to the file

handle - file-handle that will be used for this file

flags - OPEN_READ / OPEN_WRITE / OPEN_CREAT

Returns:

0 on success, otherwise < 0 indicating error

opendir

public static int opendir(java.lang.String path,
                          MFile handle)

opens a directory

Parameters:

path - absolute path to the directory

handle - file-handle that will be used for this directory

Returns:

0 on success, otherwise < 0 indicating error

mkdir

public static int mkdir(java.lang.String path,
                        int flags)

creates a directory in the file-system

Parameters:

path - relative path to the directory to be created

flags - flags (mode)

Returns:

0 on success, or < 0 indicating error

stat

public static int stat(java.lang.String path,
                       MInode statbuf)

stats a file/directory

Parameters:

path - absolute path to the file/directory

statbuf - MInode where the information will be placed

Returns:

0 on success, otherwise < 0 indicating error

access

public static int access(java.lang.String path,
                         int amode)

tests for access to a file

Parameters:

path - absolute path to the file/directory

amode - access mode: bitwise-or of (MFileOps) F_OK, R_OK, W_OK and/or X_OK

Returns:

0 on success, otherwise < 0 indicating error

unlink

public static int unlink(java.lang.String path)

unlinks (removes) a file or directory

Parameters:

path - absolute path to the file/directory

Returns:

0 on success, otherwise < 0 indicating error