mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
374 lines
16 KiB
C#
374 lines
16 KiB
C#
// /***************************************************************************
|
|
// The Disc Image Chef
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : MinixFS.cs
|
|
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
|
//
|
|
// Component : MINIX filesystem plugin.
|
|
//
|
|
// --[ Description ] ----------------------------------------------------------
|
|
//
|
|
// Identifies the MINIX filesystem and shows information.
|
|
//
|
|
// --[ License ] --------------------------------------------------------------
|
|
//
|
|
// This library is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as
|
|
// published by the Free Software Foundation; either version 2.1 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful, but
|
|
// WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
// Copyright © 2011-2017 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
using DiscImageChef.CommonTypes;
|
|
|
|
namespace DiscImageChef.Filesystems
|
|
{
|
|
// Information from the Linux kernel
|
|
public class MinixFS : Filesystem
|
|
{
|
|
const ushort MINIX_MAGIC = 0x137F;
|
|
// Minix v1, 14 char filenames
|
|
const ushort MINIX_MAGIC2 = 0x138F;
|
|
// Minix v1, 30 char filenames
|
|
const ushort MINIX2_MAGIC = 0x2468;
|
|
// Minix v2, 14 char filenames
|
|
const ushort MINIX2_MAGIC2 = 0x2478;
|
|
// Minix v2, 30 char filenames
|
|
const ushort MINIX3_MAGIC = 0x4D5A;
|
|
// Minix v3, 60 char filenames
|
|
// Byteswapped
|
|
const ushort MINIX_CIGAM = 0x7F13;
|
|
// Minix v1, 14 char filenames
|
|
const ushort MINIX_CIGAM2 = 0x8F13;
|
|
// Minix v1, 30 char filenames
|
|
const ushort MINIX2_CIGAM = 0x6824;
|
|
// Minix v2, 14 char filenames
|
|
const ushort MINIX2_CIGAM2 = 0x7824;
|
|
// Minix v2, 30 char filenames
|
|
const ushort MINIX3_CIGAM = 0x5A4D;
|
|
// Minix v3, 60 char filenames
|
|
|
|
public MinixFS()
|
|
{
|
|
Name = "Minix Filesystem";
|
|
PluginUUID = new Guid("FE248C3B-B727-4AE5-A39F-79EA9A07D4B3");
|
|
CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
|
|
}
|
|
|
|
public MinixFS(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
|
|
{
|
|
Name = "Minix Filesystem";
|
|
PluginUUID = new Guid("FE248C3B-B727-4AE5-A39F-79EA9A07D4B3");
|
|
if(encoding == null)
|
|
CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
|
|
}
|
|
|
|
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
|
|
{
|
|
if((2 + partition.PartitionStartSector) >= partition.PartitionEndSector)
|
|
return false;
|
|
|
|
ushort magic;
|
|
byte[] minix_sb_sector = imagePlugin.ReadSector(2 + partition.PartitionStartSector);
|
|
|
|
magic = BitConverter.ToUInt16(minix_sb_sector, 0x010); // Here should reside magic number on Minix V1 & V2
|
|
|
|
if(magic == MINIX_MAGIC || magic == MINIX_MAGIC2 || magic == MINIX2_MAGIC || magic == MINIX2_MAGIC2 ||
|
|
magic == MINIX_CIGAM || magic == MINIX_CIGAM2 || magic == MINIX2_CIGAM || magic == MINIX2_CIGAM2)
|
|
return true;
|
|
magic = BitConverter.ToUInt16(minix_sb_sector, 0x018); // Here should reside magic number on Minix V3
|
|
|
|
if(magic == MINIX3_MAGIC || magic == MINIX3_CIGAM)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
|
|
{
|
|
information = "";
|
|
|
|
StringBuilder sb = new StringBuilder();
|
|
|
|
bool minix3 = false;
|
|
int filenamesize;
|
|
string minixVersion;
|
|
ushort magic;
|
|
byte[] minix_sb_sector = imagePlugin.ReadSector(2 + partition.PartitionStartSector);
|
|
|
|
magic = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x018);
|
|
|
|
xmlFSType = new Schemas.FileSystemType();
|
|
|
|
if(magic == MINIX3_MAGIC || magic == MINIX3_CIGAM)
|
|
{
|
|
filenamesize = 60;
|
|
minixVersion = "Minix V3 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = magic != MINIX3_CIGAM;
|
|
|
|
xmlFSType.Type = "Minix V3";
|
|
|
|
minix3 = true;
|
|
}
|
|
else
|
|
{
|
|
magic = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x010);
|
|
|
|
switch(magic)
|
|
{
|
|
case MINIX_MAGIC:
|
|
filenamesize = 14;
|
|
minixVersion = "Minix V1 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = true;
|
|
xmlFSType.Type = "Minix V1";
|
|
break;
|
|
case MINIX_MAGIC2:
|
|
filenamesize = 30;
|
|
minixVersion = "Minix V1 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = true;
|
|
xmlFSType.Type = "Minix V1";
|
|
break;
|
|
case MINIX2_MAGIC:
|
|
filenamesize = 14;
|
|
minixVersion = "Minix V2 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = true;
|
|
xmlFSType.Type = "Minix V2";
|
|
break;
|
|
case MINIX2_MAGIC2:
|
|
filenamesize = 30;
|
|
minixVersion = "Minix V2 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = true;
|
|
xmlFSType.Type = "Minix V2";
|
|
break;
|
|
case MINIX_CIGAM:
|
|
filenamesize = 14;
|
|
minixVersion = "Minix V1 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = false;
|
|
xmlFSType.Type = "Minix V1";
|
|
break;
|
|
case MINIX_CIGAM2:
|
|
filenamesize = 30;
|
|
minixVersion = "Minix V1 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = false;
|
|
xmlFSType.Type = "Minix V1";
|
|
break;
|
|
case MINIX2_CIGAM:
|
|
filenamesize = 14;
|
|
minixVersion = "Minix V2 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = false;
|
|
xmlFSType.Type = "Minix V2";
|
|
break;
|
|
case MINIX2_CIGAM2:
|
|
filenamesize = 30;
|
|
minixVersion = "Minix V2 filesystem";
|
|
BigEndianBitConverter.IsLittleEndian = false;
|
|
xmlFSType.Type = "Minix V2";
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
}
|
|
|
|
if(minix3)
|
|
{
|
|
Minix3SuperBlock mnx_sb = new Minix3SuperBlock();
|
|
|
|
mnx_sb.s_ninodes = BigEndianBitConverter.ToUInt32(minix_sb_sector, 0x00);
|
|
mnx_sb.s_pad0 = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x04);
|
|
mnx_sb.s_imap_blocks = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x06);
|
|
mnx_sb.s_zmap_blocks = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x08);
|
|
mnx_sb.s_firstdatazone = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x0A);
|
|
mnx_sb.s_log_zone_size = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x0C);
|
|
mnx_sb.s_pad1 = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x0E);
|
|
mnx_sb.s_max_size = BigEndianBitConverter.ToUInt32(minix_sb_sector, 0x10);
|
|
mnx_sb.s_zones = BigEndianBitConverter.ToUInt32(minix_sb_sector, 0x14);
|
|
mnx_sb.s_magic = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x18);
|
|
mnx_sb.s_pad2 = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x1A);
|
|
mnx_sb.s_blocksize = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x1C);
|
|
mnx_sb.s_disk_version = minix_sb_sector[0x1E];
|
|
|
|
sb.AppendLine(minixVersion);
|
|
sb.AppendFormat("{0} chars in filename", filenamesize).AppendLine();
|
|
sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_zones, mnx_sb.s_zones * mnx_sb.s_blocksize).AppendLine();
|
|
sb.AppendFormat("{0} bytes/block", mnx_sb.s_blocksize).AppendLine();
|
|
sb.AppendFormat("{0} inodes on volume", mnx_sb.s_ninodes).AppendLine();
|
|
sb.AppendFormat("{0} blocks on inode map ({1} bytes)", mnx_sb.s_imap_blocks, mnx_sb.s_imap_blocks * mnx_sb.s_blocksize).AppendLine();
|
|
sb.AppendFormat("{0} blocks on zone map ({1} bytes)", mnx_sb.s_zmap_blocks, mnx_sb.s_zmap_blocks * mnx_sb.s_blocksize).AppendLine();
|
|
sb.AppendFormat("First data zone: {0}", mnx_sb.s_firstdatazone).AppendLine();
|
|
//sb.AppendFormat("log2 of blocks/zone: {0}", mnx_sb.s_log_zone_size).AppendLine(); // Apparently 0
|
|
sb.AppendFormat("{0} bytes maximum per file", mnx_sb.s_max_size).AppendLine();
|
|
sb.AppendFormat("On-disk filesystem version: {0}", mnx_sb.s_disk_version).AppendLine();
|
|
|
|
xmlFSType.ClusterSize = mnx_sb.s_blocksize;
|
|
xmlFSType.Clusters = (long)((partition.PartitionEndSector - partition.PartitionStartSector + 1) * imagePlugin.GetSectorSize() / mnx_sb.s_blocksize);
|
|
}
|
|
else
|
|
{
|
|
MinixSuperBlock mnx_sb = new MinixSuperBlock();
|
|
|
|
mnx_sb.s_ninodes = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x00);
|
|
mnx_sb.s_nzones = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x02);
|
|
mnx_sb.s_imap_blocks = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x04);
|
|
mnx_sb.s_zmap_blocks = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x06);
|
|
mnx_sb.s_firstdatazone = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x08);
|
|
mnx_sb.s_log_zone_size = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x0A);
|
|
mnx_sb.s_max_size = BigEndianBitConverter.ToUInt32(minix_sb_sector, 0x0C);
|
|
mnx_sb.s_magic = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x10);
|
|
mnx_sb.s_state = BigEndianBitConverter.ToUInt16(minix_sb_sector, 0x12);
|
|
mnx_sb.s_zones = BigEndianBitConverter.ToUInt32(minix_sb_sector, 0x14);
|
|
|
|
sb.AppendLine(minixVersion);
|
|
sb.AppendFormat("{0} chars in filename", filenamesize).AppendLine();
|
|
if(mnx_sb.s_zones > 0) // On V2
|
|
sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_zones, mnx_sb.s_zones * 1024).AppendLine();
|
|
else
|
|
sb.AppendFormat("{0} zones on volume ({1} bytes)", mnx_sb.s_nzones, mnx_sb.s_nzones * 1024).AppendLine();
|
|
sb.AppendFormat("{0} inodes on volume", mnx_sb.s_ninodes).AppendLine();
|
|
sb.AppendFormat("{0} blocks on inode map ({1} bytes)", mnx_sb.s_imap_blocks, mnx_sb.s_imap_blocks * 1024).AppendLine();
|
|
sb.AppendFormat("{0} blocks on zone map ({1} bytes)", mnx_sb.s_zmap_blocks, mnx_sb.s_zmap_blocks * 1024).AppendLine();
|
|
sb.AppendFormat("First data zone: {0}", mnx_sb.s_firstdatazone).AppendLine();
|
|
//sb.AppendFormat("log2 of blocks/zone: {0}", mnx_sb.s_log_zone_size).AppendLine(); // Apparently 0
|
|
sb.AppendFormat("{0} bytes maximum per file", mnx_sb.s_max_size).AppendLine();
|
|
sb.AppendFormat("Filesystem state: {0:X4}", mnx_sb.s_state).AppendLine();
|
|
xmlFSType.ClusterSize = 1024;
|
|
xmlFSType.Clusters = (long)((partition.PartitionEndSector - partition.PartitionStartSector + 1) * imagePlugin.GetSectorSize() / 1024);
|
|
}
|
|
information = sb.ToString();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Superblock for Minix V1 and V2 filesystems
|
|
/// </summary>
|
|
public struct MinixSuperBlock
|
|
{
|
|
/// <summary>0x00, inodes on volume</summary>
|
|
public ushort s_ninodes;
|
|
/// <summary>0x02, zones on volume</summary>
|
|
public ushort s_nzones;
|
|
/// <summary>0x04, blocks on inode map</summary>
|
|
public ushort s_imap_blocks;
|
|
/// <summary>0x06, blocks on zone map</summary>
|
|
public ushort s_zmap_blocks;
|
|
/// <summary>0x08, first data zone</summary>
|
|
public ushort s_firstdatazone;
|
|
/// <summary>0x0A, log2 of blocks/zone</summary>
|
|
public ushort s_log_zone_size;
|
|
/// <summary>0x0C, max file size</summary>
|
|
public uint s_max_size;
|
|
/// <summary>0x10, magic</summary>
|
|
public ushort s_magic;
|
|
/// <summary>0x12, filesystem state</summary>
|
|
public ushort s_state;
|
|
/// <summary>0x14, number of zones</summary>
|
|
public uint s_zones;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Superblock for Minix V3 filesystems
|
|
/// </summary>
|
|
public struct Minix3SuperBlock
|
|
{
|
|
/// <summary>0x00, inodes on volume</summary>
|
|
public uint s_ninodes;
|
|
/// <summary>0x04, padding</summary>
|
|
public ushort s_pad0;
|
|
/// <summary>0x06, blocks on inode map</summary>
|
|
public ushort s_imap_blocks;
|
|
/// <summary>0x08, blocks on zone map</summary>
|
|
public ushort s_zmap_blocks;
|
|
/// <summary>0x0A, first data zone</summary>
|
|
public ushort s_firstdatazone;
|
|
/// <summary>0x0C, log2 of blocks/zone</summary>
|
|
public ushort s_log_zone_size;
|
|
/// <summary>0x0E, padding</summary>
|
|
public ushort s_pad1;
|
|
/// <summary>0x10, max file size</summary>
|
|
public uint s_max_size;
|
|
/// <summary>0x14, number of zones</summary>
|
|
public uint s_zones;
|
|
/// <summary>0x18, magic</summary>
|
|
public ushort s_magic;
|
|
/// <summary>0x1A, padding</summary>
|
|
public ushort s_pad2;
|
|
/// <summary>0x1C, bytes in a block</summary>
|
|
public ushort s_blocksize;
|
|
/// <summary>0x1E, on-disk structures version</summary>
|
|
public byte s_disk_version;
|
|
}
|
|
|
|
public override Errno Mount()
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Mount(bool debug)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Unmount()
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno GetAttributes(string path, ref FileAttributes attributes)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ListXAttr(string path, ref List<string> xattrs)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno GetXattr(string path, string xattr, ref byte[] buf)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Read(string path, long offset, long size, ref byte[] buf)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ReadDir(string path, ref List<string> contents)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno StatFs(ref FileSystemInfo stat)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno Stat(string path, ref FileEntryInfo stat)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
|
|
public override Errno ReadLink(string path, ref string dest)
|
|
{
|
|
return Errno.NotImplemented;
|
|
}
|
|
}
|
|
}
|
|
|