mirror of
https://github.com/aaru-dps/Aaru.git
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164 lines
7.2 KiB
C#
164 lines
7.2 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 : IBM JFS 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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// ReSharper disable UnusedMember.Local
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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 Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>Implements detection of IBM's Journaled File System</summary>
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public sealed partial class JFS
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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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uint bootSectors = JFS_BOOT_BLOCKS_SIZE / imagePlugin.Info.SectorSize;
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if(partition.Start + bootSectors >= partition.End) return false;
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ErrorNumber errno = imagePlugin.ReadSector(partition.Start + bootSectors, false, out byte[] sector, out _);
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if(errno != ErrorNumber.NoError) return false;
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if(sector.Length < 512) return false;
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SuperBlock jfsSb = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sector);
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return jfsSb.s_magic == JFS_MAGIC;
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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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uint bootSectors = JFS_BOOT_BLOCKS_SIZE / imagePlugin.Info.SectorSize;
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ErrorNumber errno = imagePlugin.ReadSector(partition.Start + bootSectors, false, out byte[] sector, out _);
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if(errno != ErrorNumber.NoError) return;
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if(sector.Length < 512) return;
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SuperBlock jfsSb = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sector);
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sb.AppendLine(Localization.JFS_filesystem);
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sb.AppendFormat(Localization.Version_0, jfsSb.s_version).AppendLine();
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sb.AppendFormat(Localization._0_blocks_of_1_bytes, jfsSb.s_size, jfsSb.s_bsize).AppendLine();
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sb.AppendFormat(Localization._0_blocks_per_allocation_group, jfsSb.s_agsize).AppendLine();
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if(jfsSb.s_flags.HasFlag(Flags.Unicode)) sb.AppendLine(Localization.Volume_uses_Unicode_for_directory_entries);
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if(jfsSb.s_flags.HasFlag(Flags.RemountRO)) sb.AppendLine(Localization.Volume_remounts_read_only_on_error);
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if(jfsSb.s_flags.HasFlag(Flags.Continue)) sb.AppendLine(Localization.Volume_continues_on_error);
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if(jfsSb.s_flags.HasFlag(Flags.Panic)) sb.AppendLine(Localization.Volume_panics_on_error);
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if(jfsSb.s_flags.HasFlag(Flags.UserQuota)) sb.AppendLine(Localization.Volume_has_user_quotas_enabled);
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if(jfsSb.s_flags.HasFlag(Flags.GroupQuota)) sb.AppendLine(Localization.Volume_has_group_quotas_enabled);
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if(jfsSb.s_flags.HasFlag(Flags.NoJournal)) sb.AppendLine(Localization.Volume_is_not_using_any_journal);
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if(jfsSb.s_flags.HasFlag(Flags.Discard))
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sb.AppendLine(Localization.Volume_sends_TRIM_UNMAP_commands_to_underlying_device);
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if(jfsSb.s_flags.HasFlag(Flags.GroupCommit)) sb.AppendLine(Localization.Volume_commits_in_groups_of_1);
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if(jfsSb.s_flags.HasFlag(Flags.LazyCommit)) sb.AppendLine(Localization.Volume_commits_lazy);
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if(jfsSb.s_flags.HasFlag(Flags.Temporary)) sb.AppendLine(Localization.Volume_does_not_commit_to_log);
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if(jfsSb.s_flags.HasFlag(Flags.InlineLog)) sb.AppendLine(Localization.Volume_has_log_within_itself);
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if(jfsSb.s_flags.HasFlag(Flags.InlineMoving))
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sb.AppendLine(Localization.Volume_has_log_within_itself_and_is_moving_it_out);
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if(jfsSb.s_flags.HasFlag(Flags.BadSAIT)) sb.AppendLine(Localization.Volume_has_bad_current_secondary_ait);
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if(jfsSb.s_flags.HasFlag(Flags.Sparse)) sb.AppendLine(Localization.Volume_supports_sparse_files);
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if(jfsSb.s_flags.HasFlag(Flags.DASDEnabled)) sb.AppendLine(Localization.Volume_has_DASD_limits_enabled);
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if(jfsSb.s_flags.HasFlag(Flags.DASDPrime)) sb.AppendLine(Localization.Volume_primes_DASD_on_boot);
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if(jfsSb.s_flags.HasFlag(Flags.SwapBytes)) sb.AppendLine(Localization.Volume_is_in_a_big_endian_system);
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if(jfsSb.s_flags.HasFlag(Flags.DirIndex)) sb.AppendLine(Localization.Volume_has_persistent_indexes);
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if(jfsSb.s_flags.HasFlag(Flags.Linux)) sb.AppendLine(Localization.Volume_supports_Linux);
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if(jfsSb.s_flags.HasFlag(Flags.DFS)) sb.AppendLine(Localization.Volume_supports_DCE_DFS_LFS);
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if(jfsSb.s_flags.HasFlag(Flags.OS2)) sb.AppendLine(Localization.Volume_supports_OS2_and_is_case_insensitive);
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if(jfsSb.s_flags.HasFlag(Flags.AIX)) sb.AppendLine(Localization.Volume_supports_AIX);
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if(jfsSb.s_state != 0) sb.AppendLine(Localization.Volume_is_dirty);
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sb.AppendFormat(Localization.Volume_was_last_updated_on_0_,
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DateHandlers.UnixUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec))
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.AppendLine();
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if(jfsSb.s_version == 1)
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sb.AppendFormat(Localization.Volume_name_0, StringHandlers.CToString(jfsSb.s_fpack, encoding)).AppendLine();
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else
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sb.AppendFormat(Localization.Volume_name_0, StringHandlers.CToString(jfsSb.s_label, encoding)).AppendLine();
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sb.AppendFormat(Localization.Volume_UUID_0, jfsSb.s_uuid).AppendLine();
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metadata = new FileSystem
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{
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Type = FS_TYPE,
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Clusters = jfsSb.s_size,
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ClusterSize = jfsSb.s_bsize,
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Bootable = true,
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VolumeName = StringHandlers.CToString(jfsSb.s_version == 1 ? jfsSb.s_fpack : jfsSb.s_label, encoding),
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VolumeSerial = $"{jfsSb.s_uuid}",
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ModificationDate = DateHandlers.UnixUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec)
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};
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if(jfsSb.s_state != 0) metadata.Dirty = true;
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information = sb.ToString();
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}
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#endregion
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} |