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131 lines
5.1 KiB
C#
131 lines
5.1 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 : UNICOS 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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// UNICOS is ILP64 so let's think everything is 64-bit
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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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/// <inheritdoc />
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/// <summary>Implements detection for the Cray UNICOS filesystem</summary>
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public sealed partial class UNICOS
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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(imagePlugin.Info.SectorSize < 512) return false;
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var sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0) sbSize++;
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if(partition.Start + sbSize >= partition.End) return false;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, false, sbSize, out byte[] sector, out _);
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if(errno != ErrorNumber.NoError) return false;
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if(sector.Length < Marshal.SizeOf<Superblock>()) return false;
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Superblock unicosSb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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AaruLogging.Debug(MODULE_NAME, Localization.magic_equals_0_expected_1, unicosSb.s_magic, UNICOS_MAGIC);
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return unicosSb.s_magic == UNICOS_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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if(imagePlugin.Info.SectorSize < 512) return;
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var sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0) sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, false, sbSize, out byte[] sector, out _);
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if(errno != ErrorNumber.NoError) return;
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if(sector.Length < Marshal.SizeOf<Superblock>()) return;
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Superblock unicosSb = Marshal.ByteArrayToStructureBigEndian<Superblock>(sector);
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if(unicosSb.s_magic != UNICOS_MAGIC) return;
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var sb = new StringBuilder();
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sb.AppendLine(Localization.UNICOS_filesystem);
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if(unicosSb.s_secure == UNICOS_SECURE) sb.AppendLine(Localization.Volume_is_secure);
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sb.AppendFormat(Localization.Volume_contains_0_partitions, unicosSb.s_npart).AppendLine();
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sb.AppendFormat(Localization._0_bytes_per_sector, unicosSb.s_iounit).AppendLine();
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sb.AppendLine(Localization._4096_bytes_per_block);
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sb.AppendFormat(Localization._0_data_blocks_in_volume, unicosSb.s_fsize).AppendLine();
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sb.AppendFormat(Localization.Root_resides_on_inode_0, unicosSb.s_root).AppendLine();
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sb.AppendFormat(Localization._0_inodes_in_volume, unicosSb.s_isize).AppendLine();
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sb.AppendFormat(Localization.Volume_last_updated_on_0, DateHandlers.UnixToDateTime(unicosSb.s_time))
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.AppendLine();
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if(unicosSb.s_error > 0)
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sb.AppendFormat(Localization.Volume_is_dirty_error_code_equals_0, unicosSb.s_error).AppendLine();
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sb.AppendFormat(Localization.Volume_name_0, StringHandlers.CToString(unicosSb.s_fname, 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 = 4096,
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Clusters = (ulong)unicosSb.s_fsize,
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VolumeName = StringHandlers.CToString(unicosSb.s_fname, encoding),
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ModificationDate = DateHandlers.UnixToDateTime(unicosSb.s_time)
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};
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metadata.Dirty |= unicosSb.s_error > 0;
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}
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#endregion
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} |