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https://github.com/aaru-dps/Aaru.git
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257 lines
9.5 KiB
C#
257 lines
9.5 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 : dump(8) file system plugin
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies backups created with dump(8) shows information.
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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 © 2011-2023 Natalia Portillo
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// ****************************************************************************/
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using System.Diagnostics.CodeAnalysis;
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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.Console;
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using Aaru.Helpers;
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using Partition = Aaru.CommonTypes.Partition;
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using ufs_daddr_t = System.Int32;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>Implements identification of a dump(8) image (virtual filesystem on a file)</summary>
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[SuppressMessage("ReSharper", "InconsistentNaming"), SuppressMessage("ReSharper", "UnusedMember.Local")]
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public sealed partial class dump
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{
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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(imagePlugin.Info.SectorSize < 512)
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return false;
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// It should be start of a tape or floppy or file
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if(partition.Start != 0)
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return false;
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uint sbSize = (uint)(Marshal.SizeOf<s_spcl>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<s_spcl>() % imagePlugin.Info.SectorSize != 0)
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sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, sbSize, out byte[] sector);
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if(errno != ErrorNumber.NoError)
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return false;
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if(sector.Length < Marshal.SizeOf<s_spcl>())
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return false;
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spcl16 oldHdr = Marshal.ByteArrayToStructureLittleEndian<spcl16>(sector);
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spcl_aix aixHdr = Marshal.ByteArrayToStructureLittleEndian<spcl_aix>(sector);
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s_spcl newHdr = Marshal.ByteArrayToStructureLittleEndian<s_spcl>(sector);
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AaruConsole.DebugWriteLine("dump(8) plugin", "old magic = 0x{0:X8}", oldHdr.c_magic);
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AaruConsole.DebugWriteLine("dump(8) plugin", "aix magic = 0x{0:X8}", aixHdr.c_magic);
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AaruConsole.DebugWriteLine("dump(8) plugin", "new magic = 0x{0:X8}", newHdr.c_magic);
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return oldHdr.c_magic == OFS_MAGIC || aixHdr.c_magic is XIX_MAGIC or XIX_CIGAM || newHdr.c_magic == OFS_MAGIC ||
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newHdr.c_magic == NFS_MAGIC || newHdr.c_magic == OFS_CIGAM || newHdr.c_magic == NFS_CIGAM ||
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newHdr.c_magic == UFS2_MAGIC || newHdr.c_magic == UFS2_CIGAM;
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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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information = "";
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metadata = new FileSystem();
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if(imagePlugin.Info.SectorSize < 512)
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return;
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if(partition.Start != 0)
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return;
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uint sbSize = (uint)(Marshal.SizeOf<s_spcl>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<s_spcl>() % imagePlugin.Info.SectorSize != 0)
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sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, sbSize, out byte[] sector);
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if(errno != ErrorNumber.NoError)
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return;
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if(sector.Length < Marshal.SizeOf<s_spcl>())
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return;
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spcl16 oldHdr = Marshal.ByteArrayToStructureLittleEndian<spcl16>(sector);
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spcl_aix aixHdr = Marshal.ByteArrayToStructureLittleEndian<spcl_aix>(sector);
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s_spcl newHdr = Marshal.ByteArrayToStructureLittleEndian<s_spcl>(sector);
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bool useOld = false;
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bool useAix = false;
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if(newHdr.c_magic == OFS_MAGIC ||
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newHdr.c_magic == NFS_MAGIC ||
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newHdr.c_magic == OFS_CIGAM ||
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newHdr.c_magic == NFS_CIGAM ||
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newHdr.c_magic == UFS2_MAGIC ||
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newHdr.c_magic == UFS2_CIGAM)
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{
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if(newHdr.c_magic == OFS_CIGAM ||
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newHdr.c_magic == NFS_CIGAM ||
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newHdr.c_magic == UFS2_CIGAM)
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newHdr = Marshal.ByteArrayToStructureBigEndian<s_spcl>(sector);
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}
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else if(aixHdr.c_magic is XIX_MAGIC or XIX_CIGAM)
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{
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useAix = true;
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if(aixHdr.c_magic == XIX_CIGAM)
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aixHdr = Marshal.ByteArrayToStructureBigEndian<spcl_aix>(sector);
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}
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else if(oldHdr.c_magic == OFS_MAGIC)
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{
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useOld = true;
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// Swap PDP-11 endian
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oldHdr.c_date = (int)Swapping.PDPFromLittleEndian((uint)oldHdr.c_date);
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oldHdr.c_ddate = (int)Swapping.PDPFromLittleEndian((uint)oldHdr.c_ddate);
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}
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else
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{
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information = Localization.Could_not_read_dump_8_header_block;
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return;
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}
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var sb = new StringBuilder();
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metadata = new FileSystem
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{
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ClusterSize = 1024,
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Clusters = partition.Size / 1024
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};
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if(useOld)
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{
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metadata.Type = Localization.Old_16_bit_dump_8;
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sb.AppendLine(metadata.Type);
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if(oldHdr.c_date > 0)
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{
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metadata.CreationDate = DateHandlers.UnixToDateTime(oldHdr.c_date);
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sb.AppendFormat(Localization.Dump_created_on_0, metadata.CreationDate).AppendLine();
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}
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if(oldHdr.c_ddate > 0)
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{
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metadata.BackupDate = DateHandlers.UnixToDateTime(oldHdr.c_ddate);
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sb.AppendFormat(Localization.Previous_dump_created_on_0, metadata.BackupDate).AppendLine();
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}
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sb.AppendFormat(Localization.Dump_volume_number_0, oldHdr.c_volume).AppendLine();
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}
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else if(useAix)
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{
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metadata.Type = FS_TYPE;
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sb.AppendLine(metadata.Type);
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if(aixHdr.c_date > 0)
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{
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metadata.CreationDate = DateHandlers.UnixToDateTime(aixHdr.c_date);
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sb.AppendFormat(Localization.Dump_created_on_0, metadata.CreationDate).AppendLine();
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}
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if(aixHdr.c_ddate > 0)
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{
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metadata.BackupDate = DateHandlers.UnixToDateTime(aixHdr.c_ddate);
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sb.AppendFormat(Localization.Previous_dump_created_on_0, metadata.BackupDate).AppendLine();
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}
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sb.AppendFormat(Localization.Dump_volume_number_0, aixHdr.c_volume).AppendLine();
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}
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else
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{
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metadata.Type = FS_TYPE;
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sb.AppendLine(metadata.Type);
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if(newHdr.c_ndate > 0)
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{
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metadata.CreationDate = DateHandlers.UnixToDateTime(newHdr.c_ndate);
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sb.AppendFormat(Localization.Dump_created_on_0, metadata.CreationDate).AppendLine();
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}
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else if(newHdr.c_date > 0)
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{
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metadata.CreationDate = DateHandlers.UnixToDateTime(newHdr.c_date);
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sb.AppendFormat(Localization.Dump_created_on_0, metadata.CreationDate).AppendLine();
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}
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if(newHdr.c_nddate > 0)
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{
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metadata.BackupDate = DateHandlers.UnixToDateTime(newHdr.c_nddate);
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sb.AppendFormat(Localization.Previous_dump_created_on_0, metadata.BackupDate).AppendLine();
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}
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else if(newHdr.c_ddate > 0)
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{
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metadata.BackupDate = DateHandlers.UnixToDateTime(newHdr.c_ddate);
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sb.AppendFormat(Localization.Previous_dump_created_on_0, metadata.BackupDate).AppendLine();
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}
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sb.AppendFormat(Localization.Dump_volume_number_0, newHdr.c_volume).AppendLine();
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sb.AppendFormat(Localization.Dump_level_0, newHdr.c_level).AppendLine();
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string dumpname = StringHandlers.CToString(newHdr.c_label);
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if(!string.IsNullOrEmpty(dumpname))
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{
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metadata.VolumeName = dumpname;
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sb.AppendFormat(Localization.Dump_label_0, dumpname).AppendLine();
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}
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string str = StringHandlers.CToString(newHdr.c_filesys);
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if(!string.IsNullOrEmpty(str))
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sb.AppendFormat(Localization.Dumped_filesystem_name_0, str).AppendLine();
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str = StringHandlers.CToString(newHdr.c_dev);
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if(!string.IsNullOrEmpty(str))
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sb.AppendFormat(Localization.Dumped_device_0, str).AppendLine();
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str = StringHandlers.CToString(newHdr.c_host);
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if(!string.IsNullOrEmpty(str))
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sb.AppendFormat(Localization.Dump_hostname_0, str).AppendLine();
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}
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information = sb.ToString();
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}
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} |