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Aaru/DiscImageChef.Filesystems/QNX4.cs

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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : QNX4.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : QNX4 filesystem plugin.
//
// --[ Description ] ----------------------------------------------------------
//
// Identifies the QNX4 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 © 2011-2020 Natalia Portillo
// ****************************************************************************/
using System;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using DiscImageChef.CommonTypes;
using DiscImageChef.CommonTypes.Interfaces;
using Schemas;
using Marshal = DiscImageChef.Helpers.Marshal;
namespace DiscImageChef.Filesystems
{
public class QNX4 : IFilesystem
{
readonly byte[] qnx4_rootDir_fname =
{
0x2F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
public FileSystemType XmlFsType { get; private set; }
public Encoding Encoding { get; private set; }
public string Name => "QNX4 Plugin";
public Guid Id => new Guid("E73A63FA-B5B0-48BF-BF82-DA5F0A8170D2");
public string Author => "Natalia Portillo";
public bool Identify(IMediaImage imagePlugin, Partition partition)
{
if(partition.Start + 1 >= imagePlugin.Info.Sectors) return false;
byte[] sector = imagePlugin.ReadSector(partition.Start + 1);
if(sector.Length < 512) return false;
QNX4_Superblock qnxSb = Marshal.ByteArrayToStructureLittleEndian<QNX4_Superblock>(sector);
// Check root directory name
if(!qnx4_rootDir_fname.SequenceEqual(qnxSb.rootDir.di_fname)) return false;
// Check sizes are multiple of blocks
if(qnxSb.rootDir.di_size % 512 != 0 || qnxSb.inode.di_size % 512 != 0 || qnxSb.boot.di_size % 512 != 0 ||
qnxSb.altBoot.di_size % 512 != 0) return false;
// Check extents are not past device
if(qnxSb.rootDir.di_first_xtnt.block + partition.Start >= partition.End ||
qnxSb.inode.di_first_xtnt.block + partition.Start >= partition.End ||
qnxSb.boot.di_first_xtnt.block + partition.Start >= partition.End ||
qnxSb.altBoot.di_first_xtnt.block + partition.Start >= partition.End) return false;
// Check inodes are in use
if((qnxSb.rootDir.di_status & 0x01) != 0x01 || (qnxSb.inode.di_status & 0x01) != 0x01 ||
(qnxSb.boot.di_status & 0x01) != 0x01) return false;
// All hail filesystems without identification marks
return true;
}
public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
Encoding encoding)
{
Encoding = encoding ?? Encoding.GetEncoding("iso-8859-15");
information = "";
byte[] sector = imagePlugin.ReadSector(partition.Start + 1);
if(sector.Length < 512) return;
QNX4_Superblock qnxSb = Marshal.ByteArrayToStructureLittleEndian<QNX4_Superblock>(sector);
// Too much useless information
/*
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_fname = {0}", CurrentEncoding.GetString(qnxSb.rootDir.di_fname));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_size = {0}", qnxSb.rootDir.di_size);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_first_xtnt.block = {0}", qnxSb.rootDir.di_first_xtnt.block);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_first_xtnt.length = {0}", qnxSb.rootDir.di_first_xtnt.length);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_xblk = {0}", qnxSb.rootDir.di_xblk);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_ftime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.rootDir.di_ftime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_mtime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.rootDir.di_mtime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_atime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.rootDir.di_atime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_ctime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.rootDir.di_ctime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_num_xtnts = {0}", qnxSb.rootDir.di_num_xtnts);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_mode = {0}", Convert.ToString(qnxSb.rootDir.di_mode, 8));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_uid = {0}", qnxSb.rootDir.di_uid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_gid = {0}", qnxSb.rootDir.di_gid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_nlink = {0}", qnxSb.rootDir.di_nlink);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_zero = {0}", qnxSb.rootDir.di_zero);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_type = {0}", qnxSb.rootDir.di_type);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.rootDir.di_status = {0}", qnxSb.rootDir.di_status);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_fname = {0}", CurrentEncoding.GetString(qnxSb.inode.di_fname));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_size = {0}", qnxSb.inode.di_size);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_first_xtnt.block = {0}", qnxSb.inode.di_first_xtnt.block);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_first_xtnt.length = {0}", qnxSb.inode.di_first_xtnt.length);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_xblk = {0}", qnxSb.inode.di_xblk);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_ftime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.inode.di_ftime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_mtime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.inode.di_mtime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_atime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.inode.di_atime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_ctime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.inode.di_ctime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_num_xtnts = {0}", qnxSb.inode.di_num_xtnts);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_mode = {0}", Convert.ToString(qnxSb.inode.di_mode, 8));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_uid = {0}", qnxSb.inode.di_uid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_gid = {0}", qnxSb.inode.di_gid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_nlink = {0}", qnxSb.inode.di_nlink);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_zero = {0}", qnxSb.inode.di_zero);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_type = {0}", qnxSb.inode.di_type);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.inode.di_status = {0}", qnxSb.inode.di_status);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_fname = {0}", CurrentEncoding.GetString(qnxSb.boot.di_fname));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_size = {0}", qnxSb.boot.di_size);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_first_xtnt.block = {0}", qnxSb.boot.di_first_xtnt.block);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_first_xtnt.length = {0}", qnxSb.boot.di_first_xtnt.length);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_xblk = {0}", qnxSb.boot.di_xblk);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_ftime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.boot.di_ftime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_mtime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.boot.di_mtime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_atime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.boot.di_atime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_ctime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.boot.di_ctime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_num_xtnts = {0}", qnxSb.boot.di_num_xtnts);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_mode = {0}", Convert.ToString(qnxSb.boot.di_mode, 8));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_uid = {0}", qnxSb.boot.di_uid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_gid = {0}", qnxSb.boot.di_gid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_nlink = {0}", qnxSb.boot.di_nlink);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_zero = {0}", qnxSb.boot.di_zero);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_type = {0}", qnxSb.boot.di_type);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.boot.di_status = {0}", qnxSb.boot.di_status);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_fname = {0}", CurrentEncoding.GetString(qnxSb.altBoot.di_fname));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_size = {0}", qnxSb.altBoot.di_size);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_first_xtnt.block = {0}", qnxSb.altBoot.di_first_xtnt.block);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_first_xtnt.length = {0}", qnxSb.altBoot.di_first_xtnt.length);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_xblk = {0}", qnxSb.altBoot.di_xblk);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_ftime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.altBoot.di_ftime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_mtime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.altBoot.di_mtime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_atime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.altBoot.di_atime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_ctime = {0}", DateHandlers.UNIXUnsignedToDateTime(qnxSb.altBoot.di_ctime));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_num_xtnts = {0}", qnxSb.altBoot.di_num_xtnts);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_mode = {0}", Convert.ToString(qnxSb.altBoot.di_mode, 8));
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_uid = {0}", qnxSb.altBoot.di_uid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_gid = {0}", qnxSb.altBoot.di_gid);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_nlink = {0}", qnxSb.altBoot.di_nlink);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_zero = {0}", qnxSb.altBoot.di_zero);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_type = {0}", qnxSb.altBoot.di_type);
DicConsole.DebugWriteLine("QNX4 plugin", "qnxSb.altBoot.di_status = {0}", qnxSb.altBoot.di_status);
*/
information =
$"QNX4 filesystem\nCreated on {DateHandlers.UnixUnsignedToDateTime(qnxSb.rootDir.di_ftime)}\n";
XmlFsType = new FileSystemType
{
Type = "QNX4 filesystem",
Clusters = partition.Length,
ClusterSize = 512,
CreationDate = DateHandlers.UnixUnsignedToDateTime(qnxSb.rootDir.di_ftime),
CreationDateSpecified = true,
ModificationDate = DateHandlers.UnixUnsignedToDateTime(qnxSb.rootDir.di_mtime),
ModificationDateSpecified = true
};
XmlFsType.Bootable |= qnxSb.boot.di_size != 0 || qnxSb.altBoot.di_size != 0;
}
struct QNX4_Extent
{
public uint block;
public uint length;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QNX4_Inode
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
public readonly byte[] di_fname;
public readonly uint di_size;
public readonly QNX4_Extent di_first_xtnt;
public readonly uint di_xblk;
public readonly uint di_ftime;
public readonly uint di_mtime;
public readonly uint di_atime;
public readonly uint di_ctime;
public readonly ushort di_num_xtnts;
public readonly ushort di_mode;
public readonly ushort di_uid;
public readonly ushort di_gid;
public readonly ushort di_nlink;
public readonly uint di_zero;
public readonly byte di_type;
public readonly byte di_status;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QNX4_LinkInfo
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 48)]
public readonly byte[] dl_fname;
public readonly uint dl_inode_blk;
public readonly byte dl_inode_ndx;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
public readonly byte[] dl_spare;
public readonly byte dl_status;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QNX4_ExtentBlock
{
public readonly uint next_xblk;
public readonly uint prev_xblk;
public readonly byte num_xtnts;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
public readonly byte[] spare;
public readonly uint num_blocks;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 60)]
public readonly QNX4_Extent[] xtnts;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
public readonly byte[] signature;
public readonly QNX4_Extent first_xtnt;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QNX4_Superblock
{
public readonly QNX4_Inode rootDir;
public readonly QNX4_Inode inode;
public readonly QNX4_Inode boot;
public readonly QNX4_Inode altBoot;
}
}
}
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