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115 lines
3.9 KiB
C#
115 lines
3.9 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Inode.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Cram 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 © 2011-2026 Natalia Portillo
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// ****************************************************************************/
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using Aaru.CommonTypes.Structs;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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public sealed partial class Cram
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{
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/// <summary>Converts a cramfs inode to a FileEntryInfo structure</summary>
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/// <param name="inode">The cramfs inode</param>
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/// <returns>FileEntryInfo with the file's metadata</returns>
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FileEntryInfo InodeToFileEntryInfo(Inode inode)
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{
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ushort mode = GetInodeMode(inode);
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ushort uid = GetInodeUid(inode);
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uint size = GetInodeSize(inode);
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byte gid = GetInodeGid(inode);
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var info = new FileEntryInfo
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{
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Attributes = FileAttributes.None,
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BlockSize = 4096, // CramFS uses 4K pages
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Length = size,
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UID = uid,
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GID = gid,
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Mode = (uint)(mode & S_IPERM)
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};
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// CramFS doesn't store timestamps
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// Links count is not stored in cramfs
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// Determine file type from mode
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var fileType = (ushort)(mode & S_IFMT);
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switch(fileType)
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{
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case S_IFDIR:
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info.Attributes = FileAttributes.Directory;
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break;
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case S_IFREG:
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info.Attributes = FileAttributes.File;
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break;
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case S_IFLNK:
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info.Attributes = FileAttributes.Symlink;
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break;
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case S_IFCHR:
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info.Attributes = FileAttributes.CharDevice;
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// For device files, Size field contains device number (i_rdev)
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// Major = bits 8-15, Minor = bits 0-7
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uint chrMajor = size >> 8 & 0xFF;
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uint chrMinor = size & 0xFF;
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info.DeviceNo = (ulong)chrMajor << 32 | chrMinor;
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break;
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case S_IFBLK:
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info.Attributes = FileAttributes.BlockDevice;
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// For device files, Size field contains device number (i_rdev)
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// Major = bits 8-15, Minor = bits 0-7
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uint blkMajor = size >> 8 & 0xFF;
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uint blkMinor = size & 0xFF;
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info.DeviceNo = (ulong)blkMajor << 32 | blkMinor;
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break;
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case S_IFIFO:
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info.Attributes = FileAttributes.Pipe;
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break;
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case S_IFSOCK:
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info.Attributes = FileAttributes.Socket;
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break;
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default:
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info.Attributes = FileAttributes.File;
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break;
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}
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// Calculate blocks (size / block size, rounded up)
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info.Blocks = (size + 4095) / 4096;
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return info;
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}
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} |