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340 lines
18 KiB
C#
340 lines
18 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : NeXT.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 NeXTStep and OpenStep 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 © 2011-2017 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 System.Text;
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using DiscImageChef.Console;
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// Information learnt from XNU source and testing against real disks
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namespace DiscImageChef.PartPlugins
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{
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public class NeXTDisklabel : PartPlugin
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{
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const uint NEXT_MAGIC1 = 0x4E655854;
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// "NeXT"
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const uint NEXT_MAGIC2 = 0x646C5632;
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// "dlV2"
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const uint NEXT_MAGIC3 = 0x646C5633;
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// "dlV3"
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const ushort disktabStart = 0xB4;
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// 180
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const ushort disktabEntrySize = 0x2C;
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// 44
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public NeXTDisklabel()
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{
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Name = "NeXT Disklabel";
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PluginUUID = new Guid("246A6D93-4F1A-1F8A-344D-50187A5513A9");
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}
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public override bool GetInformation(ImagePlugins.ImagePlugin imagePlugin, out List<CommonTypes.Partition> partitions)
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{
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bool magic_found = false;
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byte[] label_sector;
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uint magic;
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uint sector_size;
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if(imagePlugin.GetSectorSize() == 2352 || imagePlugin.GetSectorSize() == 2448)
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sector_size = 2048;
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else
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sector_size = imagePlugin.GetSectorSize();
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partitions = new List<CommonTypes.Partition>();
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BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
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label_sector = imagePlugin.ReadSector(0); // Starts on sector 0 on NeXT machines, CDs and floppies
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magic = BigEndianBitConverter.ToUInt32(label_sector, 0x00);
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ulong label_position = 0;
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foreach(ulong i in new ulong[]{0, 4, 15, 16})
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{
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label_sector = imagePlugin.ReadSector(i);
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magic = BigEndianBitConverter.ToUInt32(label_sector, 0x00);
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if(magic == NEXT_MAGIC1 || magic == NEXT_MAGIC2 || magic == NEXT_MAGIC3)
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{
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magic_found = true;
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label_position = i;
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break;
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}
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}
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if(!magic_found)
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return false;
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uint sectors_to_read = 7680 / imagePlugin.ImageInfo.sectorSize;
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if(7680 % imagePlugin.ImageInfo.sectorSize > 0)
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sectors_to_read++;
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label_sector = imagePlugin.ReadSectors(label_position, sectors_to_read);
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NeXTLabel label = BigEndianMarshal.ByteArrayToStructureBigEndian<NeXTLabel>(label_sector);
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byte[] disktab_b = new byte[498];
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Array.Copy(label_sector, 44, disktab_b, 0, 498);
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label.dl_dt = BigEndianMarshal.ByteArrayToStructureBigEndian<NeXTDiskTab>(disktab_b);
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label.dl_dt.d_partitions = new NeXTEntry[8];
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_version = 0x{0:X8}", label.dl_version);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_label_blkno = {0}", label.dl_label_blkno);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_size = {0}", label.dl_size);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_label = \"{0}\"", StringHandlers.CToString(label.dl_label));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_flags = {0}", label.dl_flags);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_tag = 0x{0:X8}", label.dl_tag);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_name = \"{0}\"", StringHandlers.CToString(label.dl_dt.d_name));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_type = \"{0}\"", StringHandlers.CToString(label.dl_dt.d_type));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_secsize = {0}", label.dl_dt.d_secsize);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ntracks = {0}", label.dl_dt.d_ntracks);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_nsectors = {0}", label.dl_dt.d_nsectors);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ncylinders = {0}", label.dl_dt.d_ncylinders);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_rpm = {0}", label.dl_dt.d_rpm);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_front = {0}", label.dl_dt.d_front);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_back = {0}", label.dl_dt.d_back);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ngroups = {0}", label.dl_dt.d_ngroups);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ag_size = {0}", label.dl_dt.d_ag_size);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ag_alts = {0}", label.dl_dt.d_ag_alts);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_ag_off = {0}", label.dl_dt.d_ag_off);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_boot0_blkno[0] = {0}", label.dl_dt.d_boot0_blkno[0]);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_boot0_blkno[1] = {0}", label.dl_dt.d_boot0_blkno[1]);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_bootfile = \"{0}\"", StringHandlers.CToString(label.dl_dt.d_bootfile));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_hostname = \"{0}\"", StringHandlers.CToString(label.dl_dt.d_hostname));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_rootpartition = {0}", label.dl_dt.d_rootpartition);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_rwpartition = {0}", label.dl_dt.d_rwpartition);
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for(int i = 0; i < 8; i++)
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{
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byte[] part_b = new byte[44];
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Array.Copy(label_sector, 44 + 146 + 44 * i, part_b, 0, 44);
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label.dl_dt.d_partitions[i] = BigEndianMarshal.ByteArrayToStructureBigEndian<NeXTEntry>(part_b);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_base = {1}", i, label.dl_dt.d_partitions[i].p_base);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_size = {1}", i, label.dl_dt.d_partitions[i].p_size);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_bsize = {1}", i, label.dl_dt.d_partitions[i].p_bsize);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_fsize = {1}", i, label.dl_dt.d_partitions[i].p_fsize);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_opt = {1}", i, label.dl_dt.d_partitions[i].p_opt);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_cpg = {1}", i, label.dl_dt.d_partitions[i].p_cpg);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_density = {1}", i, label.dl_dt.d_partitions[i].p_density);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_minfree = {1}", i, label.dl_dt.d_partitions[i].p_minfree);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_newfs = {1}", i, label.dl_dt.d_partitions[i].p_newfs);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_mountpt = \"{1}\"", i, StringHandlers.CToString(label.dl_dt.d_partitions[i].p_mountpt));
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_automnt = {1}", i, label.dl_dt.d_partitions[i].p_automnt);
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_type = \"{1}\"", i, StringHandlers.CToString(label.dl_dt.d_partitions[i].p_type));
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if(label.dl_dt.d_partitions[i].p_size > 0 && label.dl_dt.d_partitions[i].p_base >= 0 && label.dl_dt.d_partitions[i].p_bsize >= 0)
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{
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StringBuilder sb = new StringBuilder();
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CommonTypes.Partition part = new CommonTypes.Partition()
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{
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Size = (ulong)(label.dl_dt.d_partitions[i].p_size * label.dl_dt.d_secsize),
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Offset = (ulong)((label.dl_dt.d_partitions[i].p_base + label.dl_dt.d_front) * label.dl_dt.d_secsize),
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Type = StringHandlers.CToString(label.dl_dt.d_partitions[i].p_type),
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Sequence = (ulong)i,
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Name = StringHandlers.CToString(label.dl_dt.d_partitions[i].p_mountpt),
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Length = (ulong)((label.dl_dt.d_partitions[i].p_size * label.dl_dt.d_secsize) / sector_size),
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Start = (ulong)(((label.dl_dt.d_partitions[i].p_base + label.dl_dt.d_front) * label.dl_dt.d_secsize) / sector_size),
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Scheme = Name
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};
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if(part.Start + part.Length > imagePlugin.ImageInfo.sectors)
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{
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DicConsole.DebugWriteLine("NeXT Plugin", "Partition bigger than device, reducing...");
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part.Length = imagePlugin.ImageInfo.sectors - part.Start;
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part.Size = part.Length * sector_size;
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DicConsole.DebugWriteLine("NeXT Plugin", "label.dl_dt.d_partitions[{0}].p_size = {1}", i, part.Length);
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}
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sb.AppendFormat("{0} bytes per block", label.dl_dt.d_partitions[i].p_bsize).AppendLine();
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sb.AppendFormat("{0} bytes per fragment", label.dl_dt.d_partitions[i].p_fsize).AppendLine();
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if(label.dl_dt.d_partitions[i].p_opt == 's')
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sb.AppendLine("Space optimized");
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else if(label.dl_dt.d_partitions[i].p_opt == 't')
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sb.AppendLine("Time optimized");
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else
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sb.AppendFormat("Unknown optimization {0:X2}", label.dl_dt.d_partitions[i].p_opt).AppendLine();
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sb.AppendFormat("{0} cylinders per group", label.dl_dt.d_partitions[i].p_cpg).AppendLine();
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sb.AppendFormat("{0} bytes per inode", label.dl_dt.d_partitions[i].p_density).AppendLine();
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sb.AppendFormat("{0}% of space must be free at minimum", label.dl_dt.d_partitions[i].p_minfree).AppendLine();
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if(label.dl_dt.d_partitions[i].p_newfs != 1)
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sb.AppendLine("Filesystem should be formatted at start");
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if(label.dl_dt.d_partitions[i].p_automnt == 1)
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sb.AppendLine("Filesystem should be automatically mounted");
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part.Description = sb.ToString();
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partitions.Add(part);
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}
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}
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return true;
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}
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/// <summary>
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/// NeXT v3 disklabel, 544 bytes
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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public struct NeXTLabel
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{
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/// <summary>Signature</summary>
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public uint dl_version;
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/// <summary>Block on which this label resides</summary>
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public int dl_label_blkno;
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/// <summary>Device size in blocks</summary>
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public int dl_size;
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/// <summary>Device name</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
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public byte[] dl_label;
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/// <summary>Device flags</summary>
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public uint dl_flags;
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/// <summary>Device tag</summary>
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public uint dl_tag;
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/// <summary>Device info and partitions</summary>
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public NeXTDiskTab dl_dt;
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/// <summary>Checksum</summary>
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public ushort dl_v3_checksum;
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}
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/// <summary>
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/// NeXT v1 and v2 disklabel, 7224 bytes
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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public struct NeXTLabelOld
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{
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/// <summary>Signature</summary>
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public uint dl_version;
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/// <summary>Block on which this label resides</summary>
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public int dl_label_blkno;
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/// <summary>Device size in blocks</summary>
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public int dl_size;
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/// <summary>Device name</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
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public byte[] dl_label;
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/// <summary>Device flags</summary>
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public uint dl_flags;
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/// <summary>Device tag</summary>
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public uint dl_tag;
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/// <summary>Device info and partitions</summary>
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public NeXTDiskTab dl_dt;
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/// <summary>Bad sector table</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1670)]
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public int[] dl_bad;
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/// <summary>Checksum</summary>
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public ushort dl_checksum;
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}
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/// <summary>
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/// NeXT disktab and partitions, 498 bytes
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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public struct NeXTDiskTab
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{
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/// <summary>Drive name</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
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public byte[] d_name;
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/// <summary>Drive type</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
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public byte[] d_type;
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/// <summary>Sector size</summary>
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public int d_secsize;
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/// <summary>tracks/cylinder</summary>
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public int d_ntracks;
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/// <summary>sectors/track</summary>
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public int d_nsectors;
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/// <summary>cylinders</summary>
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public int d_ncylinders;
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/// <summary>revolutions/minute</summary>
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public int d_rpm;
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/// <summary>size of front porch in sectors</summary>
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public short d_front;
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/// <summary>size of back porch in sectors</summary>
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public short d_back;
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/// <summary>number of alt groups</summary>
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public short d_ngroups;
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/// <summary>alt group size in sectors</summary>
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public short d_ag_size;
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/// <summary>alternate sectors per alt group</summary>
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public short d_ag_alts;
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/// <summary>sector offset to first alternate</summary>
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public short d_ag_off;
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/// <summary>"blk 0" boot locations</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public int[] d_boot0_blkno;
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/// <summary>default bootfile</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 24)]
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public byte[] d_bootfile;
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/// <summary>host name</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public byte[] d_hostname;
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/// <summary>root partition</summary>
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public byte d_rootpartition;
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/// <summary>r/w partition</summary>
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public byte d_rwpartition;
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/// <summary>partitions</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
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public NeXTEntry[] d_partitions;
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}
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/// <summary>
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/// Partition entries, 44 bytes each
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/// </summary>
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[StructLayout(LayoutKind.Sequential, Pack = 2)]
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public struct NeXTEntry
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{
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/// <summary>Sector of start, counting from front porch</summary>
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public int p_base;
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/// <summary>Length in sectors</summary>
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public int p_size;
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/// <summary>Filesystem's block size</summary>
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public short p_bsize;
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/// <summary>Filesystem's fragment size</summary>
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public short p_fsize;
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/// <summary>'s'pace or 't'ime</summary>
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public byte p_opt;
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/// <summary>Cylinders per group</summary>
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public short p_cpg;
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/// <summary>Bytes per inode</summary>
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public short p_density;
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/// <summary>% of minimum free space</summary>
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public byte p_minfree;
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/// <summary>Should newfs be run on first start?</summary>
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public byte p_newfs;
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/// <summary>Mount point or empty if mount where you want</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public byte[] p_mountpt;
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/// <summary>Should automount</summary>
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public byte p_automnt;
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/// <summary>Filesystem type, always "4.3BSD"?</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
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public byte[] p_type;
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}
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}
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} |