mirror of
https://github.com/aaru-dps/Aaru.git
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Natalia Portillo
4ef3252b24
Introduces constant fields for respective debug module names, replacing the hardcoded ones. This is done to standardize the naming convention, reduce redundancy and potentially avoid any typos or name mismatches across the project. This change makes the code more maintainable and easier to update in case module names need to be changed.
217 lines
8.6 KiB
C#
217 lines
8.6 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 : Extent File System 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 © 2011-2023 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.Console;
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using Aaru.Helpers;
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using Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>Implements identification for the SGI Extent FileSystem</summary>
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public sealed partial class EFS
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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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// Misaligned
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if(imagePlugin.Info.MetadataMediaType == MetadataMediaType.OpticalDisc)
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{
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uint sbSize = (uint)((Marshal.SizeOf<Superblock>() + 0x200) / imagePlugin.Info.SectorSize);
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if((Marshal.SizeOf<Superblock>() + 0x200) % 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<Superblock>())
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return false;
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byte[] sbpiece = new byte[Marshal.SizeOf<Superblock>()];
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Array.Copy(sector, 0x200, sbpiece, 0, Marshal.SizeOf<Superblock>());
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Superblock sb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sbpiece);
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.magic_at_0_equals_1_expected_2_or_3, 0x200,
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sb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
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if(sb.sb_magic is EFS_MAGIC or EFS_MAGIC_NEW)
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return true;
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}
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else
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{
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uint sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0)
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sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start + 1, 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<Superblock>())
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return false;
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Superblock sb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.magic_at_0_equals_1_expected_2_or_3, 1, sb.sb_magic,
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EFS_MAGIC, EFS_MAGIC_NEW);
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if(sb.sb_magic is EFS_MAGIC or EFS_MAGIC_NEW)
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return true;
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}
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return false;
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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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if(imagePlugin.Info.SectorSize < 512)
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return;
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Superblock efsSb;
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// Misaligned
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if(imagePlugin.Info.MetadataMediaType == MetadataMediaType.OpticalDisc)
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{
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uint sbSize = (uint)((Marshal.SizeOf<Superblock>() + 0x400) / imagePlugin.Info.SectorSize);
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if((Marshal.SizeOf<Superblock>() + 0x400) % 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<Superblock>())
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return;
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byte[] sbpiece = new byte[Marshal.SizeOf<Superblock>()];
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Array.Copy(sector, 0x200, sbpiece, 0, Marshal.SizeOf<Superblock>());
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efsSb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sbpiece);
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.magic_at_0_X3_equals_1_expected_2_or_3, 0x200,
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efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
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}
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else
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{
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uint sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0)
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sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start + 1, 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<Superblock>())
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return;
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efsSb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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AaruConsole.DebugWriteLine(MODULE_NAME, Localization.magic_at_0_equals_1_expected_2_or_3, 1,
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efsSb.sb_magic, EFS_MAGIC, EFS_MAGIC_NEW);
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}
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if(efsSb.sb_magic != EFS_MAGIC &&
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efsSb.sb_magic != EFS_MAGIC_NEW)
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return;
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var sb = new StringBuilder();
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sb.AppendLine(Localization.SGI_extent_filesystem);
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if(efsSb.sb_magic == EFS_MAGIC_NEW)
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sb.AppendLine(Localization.New_version);
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sb.AppendFormat(Localization.Filesystem_size_0_basic_blocks, efsSb.sb_size).AppendLine();
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sb.AppendFormat(Localization.First_cylinder_group_starts_at_block_0, efsSb.sb_firstcg).AppendLine();
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sb.AppendFormat(Localization.Cylinder_group_size_0_basic_blocks, efsSb.sb_cgfsize).AppendLine();
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sb.AppendFormat(Localization._0_inodes_per_cylinder_group, efsSb.sb_cgisize).AppendLine();
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sb.AppendFormat(Localization._0_sectors_per_track, efsSb.sb_sectors).AppendLine();
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sb.AppendFormat(Localization._0_heads_per_cylinder, efsSb.sb_heads).AppendLine();
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sb.AppendFormat(Localization._0_cylinder_groups, efsSb.sb_ncg).AppendLine();
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sb.AppendFormat(Localization.Volume_created_on_0, DateHandlers.UnixToDateTime(efsSb.sb_time)).AppendLine();
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sb.AppendFormat(Localization._0_bytes_on_bitmap, efsSb.sb_bmsize).AppendLine();
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sb.AppendFormat(Localization._0_free_blocks, efsSb.sb_tfree).AppendLine();
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sb.AppendFormat(Localization._0_free_inodes, efsSb.sb_tinode).AppendLine();
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if(efsSb.sb_bmblock > 0)
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sb.AppendFormat(Localization.Bitmap_resides_at_block_0, efsSb.sb_bmblock).AppendLine();
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if(efsSb.sb_replsb > 0)
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sb.AppendFormat(Localization.Replacement_superblock_resides_at_block_0, efsSb.sb_replsb).AppendLine();
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if(efsSb.sb_lastinode > 0)
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sb.AppendFormat(Localization.Last_inode_allocated_0, efsSb.sb_lastinode).AppendLine();
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if(efsSb.sb_dirty > 0)
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sb.AppendLine(Localization.Volume_is_dirty);
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sb.AppendFormat(Localization.Checksum_0_X8, efsSb.sb_checksum).AppendLine();
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sb.AppendFormat(Localization.Volume_name_0, StringHandlers.CToString(efsSb.sb_fname, encoding)).AppendLine();
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sb.AppendFormat(Localization.Volume_pack_0, StringHandlers.CToString(efsSb.sb_fpack, encoding)).AppendLine();
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information = sb.ToString();
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metadata = new FileSystem
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{
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Type = FS_TYPE,
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ClusterSize = 512,
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Clusters = (ulong)efsSb.sb_size,
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FreeClusters = (ulong)efsSb.sb_tfree,
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Dirty = efsSb.sb_dirty > 0,
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VolumeName = StringHandlers.CToString(efsSb.sb_fname, encoding),
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VolumeSerial = $"{efsSb.sb_checksum:X8}",
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CreationDate = DateHandlers.UnixToDateTime(efsSb.sb_time)
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};
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}
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} |