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134
Aaru.Partitions/DragonFlyBSD.cs
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134
Aaru.Partitions/DragonFlyBSD.cs
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : DragonFlyBSD.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Partitioning scheme plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Manages DragonFly BSD 64-bit disklabels.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2020 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.CommonTypes.Interfaces;
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using Marshal = DiscImageChef.Helpers.Marshal;
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namespace DiscImageChef.Partitions
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{
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public class DragonFlyBSD : IPartition
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{
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const uint DISK_MAGIC64 = 0xC4464C59;
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public string Name => "DragonFly BSD 64-bit disklabel";
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public Guid Id => new Guid("D49E41A6-D952-4760-9D94-03DAE2450C5F");
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public string Author => "Natalia Portillo";
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public bool GetInformation(IMediaImage imagePlugin, out List<Partition> partitions, ulong sectorOffset)
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{
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partitions = new List<Partition>();
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uint nSectors = 2048 / imagePlugin.Info.SectorSize;
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if(2048 % imagePlugin.Info.SectorSize > 0) nSectors++;
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if(sectorOffset + nSectors >= imagePlugin.Info.Sectors) return false;
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byte[] sectors = imagePlugin.ReadSectors(sectorOffset, nSectors);
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if(sectors.Length < 2048) return false;
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Disklabel64 disklabel = Marshal.ByteArrayToStructureLittleEndian<Disklabel64>(sectors);
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if(disklabel.d_magic != 0xC4464C59) return false;
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ulong counter = 0;
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foreach(Partition64 entry in disklabel.d_partitions)
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{
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Partition part = new Partition
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{
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Start = entry.p_boffset / imagePlugin.Info.SectorSize + sectorOffset,
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Offset = entry.p_boffset +
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sectorOffset * imagePlugin.Info.SectorSize,
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Size = entry.p_bsize,
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Length = entry.p_bsize / imagePlugin.Info.SectorSize,
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Name = entry.p_stor_uuid.ToString(),
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Sequence = counter,
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Scheme = Name,
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Type = (BSD.fsType)entry.p_fstype == BSD.fsType.Other
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? entry.p_type_uuid.ToString()
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: BSD.fsTypeToString((BSD.fsType)entry.p_fstype)
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};
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if(entry.p_bsize % imagePlugin.Info.SectorSize > 0) part.Length++;
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if(entry.p_bsize <= 0 || entry.p_boffset <= 0) continue;
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partitions.Add(part);
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counter++;
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}
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return true;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct Disklabel64
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{
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)]
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public byte[] d_reserved0;
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public uint d_magic;
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public uint d_crc;
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public uint d_align;
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public uint d_npartitions;
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public Guid d_stor_uuid;
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public ulong d_total_size;
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public ulong d_bbase;
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public ulong d_pbase;
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public ulong d_pstop;
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public ulong d_abase;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] d_packname;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] d_reserved;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public Partition64[] d_partitions;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct Partition64
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{
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public ulong p_boffset;
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public ulong p_bsize;
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public byte p_fstype;
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public byte p_unused01;
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public byte p_unused02;
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public byte p_unused03;
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public uint p_unused04;
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public uint p_unused05;
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public uint p_unused06;
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public Guid p_type_uuid;
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public Guid p_stor_uuid;
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}
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}
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}
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