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160 lines
7.3 KiB
C#
160 lines
7.3 KiB
C#
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// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Structs.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.Runtime.InteropServices;
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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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// Old 16-bit format record
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct spcl16
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{
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/// <summary>Record type</summary>
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public readonly short c_type;
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/// <summary>Dump date</summary>
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public int c_date;
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/// <summary>Previous dump date</summary>
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public int c_ddate;
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/// <summary>Dump volume number</summary>
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public readonly short c_volume;
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/// <summary>Logical block of this record</summary>
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public readonly int c_tapea;
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/// <summary>Inode number</summary>
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public readonly ushort c_inumber;
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/// <summary>Magic number</summary>
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public readonly ushort c_magic;
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/// <summary>Record checksum</summary>
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public readonly int c_checksum;
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// Unneeded for now
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/*
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struct dinode c_dinode;
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int c_count;
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char c_addr[BSIZE];
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*/
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}
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// 32-bit AIX format record
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct spcl_aix
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{
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/// <summary>Record type</summary>
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public readonly int c_type;
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/// <summary>Dump date</summary>
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public readonly int c_date;
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/// <summary>Previous dump date</summary>
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public readonly int c_ddate;
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/// <summary>Dump volume number</summary>
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public readonly int c_volume;
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/// <summary>Logical block of this record</summary>
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public readonly int c_tapea;
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public readonly uint c_inumber;
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public readonly uint c_magic;
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public readonly int c_checksum;
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// Unneeded for now
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/*
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public bsd_dinode bsd_c_dinode;
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public int c_count;
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public char c_addr[TP_NINDIR];
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public int xix_flag;
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public dinode xix_dinode;
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*/
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct s_spcl
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{
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public readonly int c_type; /* record type (see below) */
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public readonly int c_date; /* date of this dump */
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public readonly int c_ddate; /* date of previous dump */
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public readonly int c_volume; /* dump volume number */
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public readonly int c_tapea; /* logical block of this record */
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public readonly uint c_inumber; /* number of inode */
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public readonly int c_magic; /* magic number (see above) */
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public readonly int c_checksum; /* record checksum */
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public readonly dinode c_dinode; /* ownership and mode of inode */
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public readonly int c_count; /* number of valid c_addr entries */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = TP_NINDIR)]
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public readonly byte[] c_addr; /* 1 => data; 0 => hole in inode */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = LBLSIZE)]
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public readonly byte[] c_label; /* dump label */
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public readonly int c_level; /* level of this dump */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = NAMELEN)]
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public readonly byte[] c_filesys; /* name of dumpped file system */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = NAMELEN)]
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public readonly byte[] c_dev; /* name of dumpped device */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = NAMELEN)]
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public readonly byte[] c_host; /* name of dumpped host */
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public readonly int c_flags; /* additional information */
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public readonly int c_firstrec; /* first record on volume */
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public readonly long c_ndate; /* date of this dump */
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public readonly long c_nddate; /* date of previous dump */
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public readonly long c_ntapea; /* logical block of this record */
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public readonly long c_nfirstrec; /* first record on volume */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
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public readonly int[] c_spare; /* reserved for future uses */
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct dinode
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{
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public readonly ushort di_mode; /* 0: IFMT, permissions; see below. */
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public readonly short di_nlink; /* 2: File link count. */
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public readonly int inumber; /* 4: Lfs: inode number. */
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public readonly ulong di_size; /* 8: File byte count. */
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public readonly int di_atime; /* 16: Last access time. */
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public readonly int di_atimensec; /* 20: Last access time. */
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public readonly int di_mtime; /* 24: Last modified time. */
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public readonly int di_mtimensec; /* 28: Last modified time. */
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public readonly int di_ctime; /* 32: Last inode change time. */
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public readonly int di_ctimensec; /* 36: Last inode change time. */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = NDADDR)]
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public readonly int[] di_db; /* 40: Direct disk blocks. */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = NIADDR)]
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public readonly int[] di_ib; /* 88: Indirect disk blocks. */
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public readonly uint di_flags; /* 100: Status flags (chflags). */
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public readonly uint di_blocks; /* 104: Blocks actually held. */
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public readonly int di_gen; /* 108: Generation number. */
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public readonly uint di_uid; /* 112: File owner. */
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public readonly uint di_gid; /* 116: File group. */
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
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public readonly int[] di_spare; /* 120: Reserved; currently unused */
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}
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}
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