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126 lines
4.9 KiB
C#
126 lines
4.9 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 : Xia 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 © 2011-2023 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;
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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 Schemas;
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namespace Aaru.Filesystems;
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// Information from the Linux kernel
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/// <inheritdoc />
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/// <summary>Implements detection for the Xia filesystem</summary>
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[SuppressMessage("ReSharper", "UnusedMember.Local"), SuppressMessage("ReSharper", "UnusedType.Local")]
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public sealed partial class Xia
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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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int sbSizeInBytes = Marshal.SizeOf<SuperBlock>();
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uint sbSizeInSectors = (uint)(sbSizeInBytes / imagePlugin.Info.SectorSize);
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if(sbSizeInBytes % imagePlugin.Info.SectorSize > 0)
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sbSizeInSectors++;
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if(sbSizeInSectors + partition.Start >= partition.End)
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return false;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, sbSizeInSectors, out byte[] sbSector);
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if(errno != ErrorNumber.NoError)
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return false;
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SuperBlock supblk = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sbSector);
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return supblk.s_magic == XIAFS_SUPER_MAGIC;
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}
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const string FS_TYPE = "xia";
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information, Encoding encoding)
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{
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Encoding = encoding ?? Encoding.GetEncoding("iso-8859-15");
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information = "";
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var sb = new StringBuilder();
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int sbSizeInBytes = Marshal.SizeOf<SuperBlock>();
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uint sbSizeInSectors = (uint)(sbSizeInBytes / imagePlugin.Info.SectorSize);
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if(sbSizeInBytes % imagePlugin.Info.SectorSize > 0)
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sbSizeInSectors++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start, sbSizeInSectors, out byte[] sbSector);
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if(errno != ErrorNumber.NoError)
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return;
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SuperBlock supblk = Marshal.ByteArrayToStructureLittleEndian<SuperBlock>(sbSector);
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sb.AppendFormat(Localization._0_bytes_per_zone, supblk.s_zone_size).AppendLine();
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sb.AppendFormat(Localization._0_zones_in_volume_1_bytes, supblk.s_nzones, supblk.s_nzones * supblk.s_zone_size).
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AppendLine();
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sb.AppendFormat(Localization._0_inodes, supblk.s_ninodes).AppendLine();
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sb.AppendFormat(Localization._0_data_zones_1_bytes, supblk.s_ndatazones,
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supblk.s_ndatazones * supblk.s_zone_size).AppendLine();
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sb.AppendFormat(Localization._0_imap_zones_1_bytes, supblk.s_imap_zones,
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supblk.s_imap_zones * supblk.s_zone_size).AppendLine();
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sb.AppendFormat(Localization._0_zmap_zones_1_bytes, supblk.s_zmap_zones,
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supblk.s_zmap_zones * supblk.s_zone_size).AppendLine();
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sb.AppendFormat(Localization.First_data_zone_0, supblk.s_firstdatazone).AppendLine();
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sb.AppendFormat(Localization.Maximum_filesize_is_0_bytes_1_MiB, supblk.s_max_size, supblk.s_max_size / 1048576).
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AppendLine();
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sb.AppendFormat(Localization._0_zones_reserved_for_kernel_images_1_bytes, supblk.s_kernzones,
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supblk.s_kernzones * supblk.s_zone_size).AppendLine();
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sb.AppendFormat(Localization.First_kernel_zone_0, supblk.s_firstkernzone).AppendLine();
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XmlFsType = new FileSystemType
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{
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Bootable = !ArrayHelpers.ArrayIsNullOrEmpty(supblk.s_boot_segment),
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Clusters = supblk.s_nzones,
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ClusterSize = supblk.s_zone_size,
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Type = FS_TYPE
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};
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information = sb.ToString();
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}
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} |