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https://github.com/aaru-dps/Aaru.git
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192 lines
7.9 KiB
C#
192 lines
7.9 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : SolarOS filesystem plugin.
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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 © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Text;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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using Aaru.Logging;
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using Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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// Based on FAT's BPB, cannot find a FAT or directory
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/// <inheritdoc />
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/// <summary>Implements detection of the Solar OS filesystem</summary>
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public sealed partial class SolarFS
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{
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#region IFilesystem Members
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/// <inheritdoc />
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(2 + partition.Start >= partition.End) return false;
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ErrorNumber errno = imagePlugin.ReadSector(0 + partition.Start, false, out byte[] bpb, out _);
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if(errno != ErrorNumber.NoError) return false;
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var fsTypeB = new byte[8];
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byte signature = bpb[0x25];
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Array.Copy(bpb, 0x35, fsTypeB, 0, 8);
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string fsType = StringHandlers.CToString(fsTypeB);
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return signature == 0x29 && fsType == "SOL_FS ";
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}
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, Encoding encoding, out string information,
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out FileSystem metadata)
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{
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encoding ??= Encoding.GetEncoding("iso-8859-15");
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information = "";
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metadata = new FileSystem();
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var sb = new StringBuilder();
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ErrorNumber errno = imagePlugin.ReadSector(0 + partition.Start, false, out byte[] bpbSector, out _);
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if(errno != ErrorNumber.NoError) return;
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var bpb = new BiosParameterBlock
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{
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bps = BitConverter.ToUInt16(bpbSector, 0x0B),
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root_ent = BitConverter.ToUInt16(bpbSector, 0x10),
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sectors = BitConverter.ToUInt16(bpbSector, 0x12),
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media = bpbSector[0x14],
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spfat = BitConverter.ToUInt16(bpbSector, 0x15),
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sptrk = BitConverter.ToUInt16(bpbSector, 0x17),
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heads = BitConverter.ToUInt16(bpbSector, 0x19),
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signature = bpbSector[0x25]
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};
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var bpbStrings = new byte[8];
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Array.Copy(bpbSector, 0x03, bpbStrings, 0, 8);
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bpb.OEMName = StringHandlers.CToString(bpbStrings);
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bpbStrings = new byte[8];
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Array.Copy(bpbSector, 0x2A, bpbStrings, 0, 11);
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bpb.vol_name = StringHandlers.CToString(bpbStrings, encoding);
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bpbStrings = new byte[8];
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Array.Copy(bpbSector, 0x35, bpbStrings, 0, 8);
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bpb.fs_type = StringHandlers.CToString(bpbStrings, encoding);
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bpb.x86_jump = new byte[3];
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Array.Copy(bpbSector, 0x00, bpb.x86_jump, 0, 3);
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bpb.unk1 = bpbSector[0x0D];
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bpb.unk2 = BitConverter.ToUInt16(bpbSector, 0x0E);
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bpb.unk3 = new byte[10];
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Array.Copy(bpbSector, 0x1B, bpb.unk3, 0, 10);
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bpb.unk4 = BitConverter.ToUInt32(bpbSector, 0x26);
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AaruLogging.Debug(MODULE_NAME,
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"BPB.x86_jump: 0x{0:X2}{1:X2}{2:X2}",
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bpb.x86_jump[0],
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bpb.x86_jump[1],
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bpb.x86_jump[2]);
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AaruLogging.Debug(MODULE_NAME, "BPB.OEMName: \"{0}\"", bpb.OEMName);
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AaruLogging.Debug(MODULE_NAME, "BPB.bps: {0}", bpb.bps);
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AaruLogging.Debug(MODULE_NAME, "BPB.unk1: 0x{0:X2}", bpb.unk1);
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AaruLogging.Debug(MODULE_NAME, "BPB.unk2: 0x{0:X4}", bpb.unk2);
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AaruLogging.Debug(MODULE_NAME, "BPB.root_ent: {0}", bpb.root_ent);
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AaruLogging.Debug(MODULE_NAME, "BPB.sectors: {0}", bpb.sectors);
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AaruLogging.Debug(MODULE_NAME, "BPB.media: 0x{0:X2}", bpb.media);
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AaruLogging.Debug(MODULE_NAME, "BPB.spfat: {0}", bpb.spfat);
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AaruLogging.Debug(MODULE_NAME, "BPB.sptrk: {0}", bpb.sptrk);
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AaruLogging.Debug(MODULE_NAME, "BPB.heads: {0}", bpb.heads);
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AaruLogging.Debug(MODULE_NAME,
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"BPB.unk3: 0x{0:X2}{1:X2}{2:X2}{3:X2}{4:X2}{5:X2}{6:X2}{7:X2}{8:X2}{9:X2}",
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bpb.unk3[0],
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bpb.unk3[1],
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bpb.unk3[2],
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bpb.unk3[3],
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bpb.unk3[4],
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bpb.unk3[5],
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bpb.unk3[6],
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bpb.unk3[7],
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bpb.unk3[8],
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bpb.unk3[9]);
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AaruLogging.Debug(MODULE_NAME, "BPB.signature: 0x{0:X2}", bpb.signature);
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AaruLogging.Debug(MODULE_NAME, "BPB.unk4: 0x{0:X8}", bpb.unk4);
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AaruLogging.Debug(MODULE_NAME, "BPB.vol_name: \"{0}\"", bpb.vol_name);
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AaruLogging.Debug(MODULE_NAME, "BPB.fs_type: \"{0}\"", bpb.fs_type);
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sb.AppendLine(Localization.Solar_OS_filesystem);
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sb.AppendFormat(Localization.Media_descriptor_0, bpb.media).AppendLine();
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sb.AppendFormat(Localization._0_bytes_per_sector, bpb.bps).AppendLine();
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if(imagePlugin.Info.SectorSize is 2336 or 2352 or 2448)
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{
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if(bpb.bps != imagePlugin.Info.SectorSize)
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{
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sb.AppendFormat(Localization
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.WARNING_Filesystem_describes_a_0_bytes_sector_while_device_describes_a_1_bytes_sector,
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bpb.bps,
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2048)
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.AppendLine();
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}
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}
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else if(bpb.bps != imagePlugin.Info.SectorSize)
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{
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sb.AppendFormat(Localization
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.WARNING_Filesystem_describes_a_0_bytes_sector_while_device_describes_a_1_bytes_sector,
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bpb.bps,
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imagePlugin.Info.SectorSize)
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.AppendLine();
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}
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sb.AppendFormat(Localization._0_sectors_on_volume_1_bytes, bpb.sectors, bpb.sectors * bpb.bps).AppendLine();
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if(bpb.sectors > imagePlugin.Info.Sectors)
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{
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sb.AppendFormat(Localization.WARNING_Filesystem_describes_a_0_sectors_volume_bigger_than_device_1_sectors,
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bpb.sectors,
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imagePlugin.Info.Sectors);
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}
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sb.AppendFormat(Localization._0_heads, bpb.heads).AppendLine();
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sb.AppendFormat(Localization._0_sectors_per_track, bpb.sptrk).AppendLine();
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sb.AppendFormat(Localization.Volume_name_0, bpb.vol_name).AppendLine();
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metadata = new FileSystem
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{
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Type = FS_TYPE,
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Clusters = bpb.sectors,
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ClusterSize = bpb.bps,
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VolumeName = bpb.vol_name
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};
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information = sb.ToString();
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}
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#endregion
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} |