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369 lines
13 KiB
C#
369 lines
13 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : File.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Apple Macintosh 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 © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.IO;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.CommonTypes.Structs;
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using Aaru.Helpers;
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using Aaru.Logging;
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using FileAttributes = Aaru.CommonTypes.Structs.FileAttributes;
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namespace Aaru.Filesystems;
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// Information from Inside Macintosh Volume II
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public sealed partial class AppleMFS
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{
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ErrorNumber ReadFile(string path, out byte[] buf, bool resourceFork, bool tags)
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{
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buf = null;
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if(!_mounted) return ErrorNumber.AccessDenied;
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string[] pathElements = path.Split(['/'], StringSplitOptions.RemoveEmptyEntries);
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if(pathElements.Length != 1) return ErrorNumber.NotSupported;
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path = pathElements[0];
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if(!_filenameToId.TryGetValue(path.ToLowerInvariant(), out uint fileId)) return ErrorNumber.NoSuchFile;
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if(!_idToEntry.TryGetValue(fileId, out FileEntry entry)) return ErrorNumber.NoSuchFile;
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uint nextBlock;
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if(resourceFork)
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{
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if(entry.flRPyLen == 0)
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{
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buf = [];
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return ErrorNumber.NoError;
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}
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nextBlock = entry.flRStBlk;
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}
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else
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{
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if(entry.flPyLen == 0)
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{
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buf = [];
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return ErrorNumber.NoError;
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}
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nextBlock = entry.flStBlk;
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}
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var ms = new MemoryStream();
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do
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{
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ErrorNumber errno = tags
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? _device.ReadSectorsTag((ulong)((nextBlock - 2) * _sectorsPerBlock) +
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_volMdb.drAlBlSt +
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_partitionStart,
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false,
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(uint)_sectorsPerBlock,
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SectorTagType.AppleSonyTag,
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out byte[] sectors)
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: _device.ReadSectors((ulong)((nextBlock - 2) * _sectorsPerBlock) +
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_volMdb.drAlBlSt +
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_partitionStart,
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false,
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(uint)_sectorsPerBlock,
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out sectors,
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out _);
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if(errno != ErrorNumber.NoError) return errno;
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ms.Write(sectors, 0, sectors.Length);
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if(_blockMap[nextBlock] == BMAP_FREE)
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{
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AaruLogging.Error(Localization.File_truncated_at_block_0, nextBlock);
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break;
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}
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nextBlock = _blockMap[nextBlock];
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} while(nextBlock > BMAP_LAST);
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if(tags)
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buf = ms.ToArray();
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else
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{
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if(resourceFork)
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{
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if(ms.Length < entry.flRLgLen)
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buf = ms.ToArray();
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else
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{
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buf = new byte[entry.flRLgLen];
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Array.Copy(ms.ToArray(), 0, buf, 0, buf.Length);
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}
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}
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else
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{
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if(ms.Length < entry.flLgLen)
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buf = ms.ToArray();
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else
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{
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buf = new byte[entry.flLgLen];
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Array.Copy(ms.ToArray(), 0, buf, 0, buf.Length);
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}
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}
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}
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return ErrorNumber.NoError;
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}
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#region IReadOnlyFilesystem Members
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/// <inheritdoc />
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public ErrorNumber GetAttributes(string path, out FileAttributes attributes)
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{
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attributes = new FileAttributes();
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if(!_mounted) return ErrorNumber.AccessDenied;
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string[] pathElements = path.Split(['/'], StringSplitOptions.RemoveEmptyEntries);
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if(pathElements.Length != 1) return ErrorNumber.NotSupported;
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path = pathElements[0];
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if(!_filenameToId.TryGetValue(path.ToLowerInvariant(), out uint fileId)) return ErrorNumber.NoSuchFile;
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if(!_idToEntry.TryGetValue(fileId, out FileEntry entry)) return ErrorNumber.NoSuchFile;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kIsAlias)) attributes |= FileAttributes.Alias;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kHasBundle)) attributes |= FileAttributes.Bundle;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kHasBeenInited))
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attributes |= FileAttributes.HasBeenInited;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kHasCustomIcon))
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attributes |= FileAttributes.HasCustomIcon;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kHasNoINITs)) attributes |= FileAttributes.HasNoINITs;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kIsInvisible)) attributes |= FileAttributes.Hidden;
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if(entry.flFlags.HasFlag(FileFlags.Locked)) attributes |= FileAttributes.Immutable;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kIsOnDesk)) attributes |= FileAttributes.IsOnDesk;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kIsShared)) attributes |= FileAttributes.Shared;
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if(entry.flUsrWds.fdFlags.HasFlag(AppleCommon.FinderFlags.kIsStationery))
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attributes |= FileAttributes.Stationery;
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if(!attributes.HasFlag(FileAttributes.Alias) &&
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!attributes.HasFlag(FileAttributes.Bundle) &&
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!attributes.HasFlag(FileAttributes.Stationery))
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attributes |= FileAttributes.File;
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attributes |= FileAttributes.BlockUnits;
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber OpenFile(string path, out IFileNode node)
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{
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node = null;
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if(!_mounted) return ErrorNumber.AccessDenied;
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byte[] file;
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ErrorNumber error = ErrorNumber.NoError;
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switch(_debug)
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{
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case true when string.Compare(path, "$", StringComparison.InvariantCulture) == 0:
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file = _directoryBlocks;
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break;
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case true when string.Compare(path, "$Boot", StringComparison.InvariantCulture) == 0 && _bootBlocks != null:
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file = _bootBlocks;
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break;
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case true when string.Compare(path, "$Bitmap", StringComparison.InvariantCulture) == 0:
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file = _blockMapBytes;
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break;
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case true when string.Compare(path, "$MDB", StringComparison.InvariantCulture) == 0:
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file = _mdbBlocks;
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break;
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default:
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error = ReadFile(path, out file, false, false);
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break;
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}
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if(error != ErrorNumber.NoError) return error;
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node = new AppleMfsFileNode
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{
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Path = path,
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Length = file.Length,
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Offset = 0,
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_cache = file
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};
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber CloseFile(IFileNode node)
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{
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if(!_mounted) return ErrorNumber.AccessDenied;
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if(node is not AppleMfsFileNode mynode) return ErrorNumber.InvalidArgument;
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mynode._cache = null;
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber ReadFile(IFileNode node, long length, byte[] buffer, out long read)
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{
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read = 0;
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if(!_mounted) return ErrorNumber.AccessDenied;
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if(buffer is null || buffer.Length < length) return ErrorNumber.InvalidArgument;
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if(node is not AppleMfsFileNode mynode) return ErrorNumber.InvalidArgument;
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read = length;
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if(length + mynode.Offset >= mynode.Length) read = mynode.Length - mynode.Offset;
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Array.Copy(mynode._cache, mynode.Offset, buffer, 0, read);
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mynode.Offset += read;
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber Stat(string path, out FileEntryInfo stat)
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{
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stat = null;
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if(!_mounted) return ErrorNumber.AccessDenied;
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string[] pathElements = path.Split(['/'], StringSplitOptions.RemoveEmptyEntries);
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if(pathElements.Length != 1) return ErrorNumber.NotSupported;
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path = pathElements[0];
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if(_debug)
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{
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if(string.Compare(path, "$", StringComparison.InvariantCulture) == 0 ||
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string.Compare(path, "$Boot", StringComparison.InvariantCulture) == 0 ||
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string.Compare(path, "$Bitmap", StringComparison.InvariantCulture) == 0 ||
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string.Compare(path, "$MDB", StringComparison.InvariantCulture) == 0)
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{
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stat = new FileEntryInfo
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{
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BlockSize = _device.Info.SectorSize,
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Inode = 0,
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Links = 1,
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Attributes = FileAttributes.System
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};
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if(string.Compare(path, "$", StringComparison.InvariantCulture) == 0)
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{
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stat.Blocks = _directoryBlocks.Length / stat.BlockSize + _directoryBlocks.Length % stat.BlockSize;
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stat.Length = _directoryBlocks.Length;
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}
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else if(string.Compare(path, "$Bitmap", StringComparison.InvariantCulture) == 0)
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{
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stat.Blocks = _blockMapBytes.Length / stat.BlockSize + _blockMapBytes.Length % stat.BlockSize;
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stat.Length = _blockMapBytes.Length;
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}
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else if(string.Compare(path, "$Boot", StringComparison.InvariantCulture) == 0 && _bootBlocks != null)
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{
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stat.Blocks = _bootBlocks.Length / stat.BlockSize + _bootBlocks.Length % stat.BlockSize;
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stat.Length = _bootBlocks.Length;
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}
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else if(string.Compare(path, "$MDB", StringComparison.InvariantCulture) == 0)
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{
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stat.Blocks = _mdbBlocks.Length / stat.BlockSize + _mdbBlocks.Length % stat.BlockSize;
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stat.Length = _mdbBlocks.Length;
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}
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else
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return ErrorNumber.InvalidArgument;
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return ErrorNumber.NoError;
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}
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}
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if(!_filenameToId.TryGetValue(path.ToLowerInvariant(), out uint fileId)) return ErrorNumber.NoSuchFile;
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if(!_idToEntry.TryGetValue(fileId, out FileEntry entry)) return ErrorNumber.NoSuchFile;
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ErrorNumber error = GetAttributes(path, out FileAttributes attr);
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if(error != ErrorNumber.NoError) return error;
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stat = new FileEntryInfo
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{
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Attributes = attr,
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Blocks = entry.flPyLen / _volMdb.drAlBlkSiz,
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BlockSize = _volMdb.drAlBlkSiz,
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CreationTime = DateHandlers.MacToDateTime(entry.flCrDat),
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Inode = entry.flFlNum,
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LastWriteTime = DateHandlers.MacToDateTime(entry.flMdDat),
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Length = entry.flLgLen,
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Links = 1
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};
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return ErrorNumber.NoError;
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}
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/// <inheritdoc />
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public ErrorNumber ReadLink(string path, out string dest)
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{
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dest = null;
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return ErrorNumber.NotImplemented;
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}
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#endregion
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} |