[HFS+] Implement StatFs.

Aaru.Filesystems/AppleHFSPlus/AppleHFSPlus.cs

@@ -30,6 +30,7 @@ using System;
 using System.Collections.Generic;
 using Aaru.CommonTypes.AaruMetadata;
 using Aaru.CommonTypes.Interfaces;
+using Aaru.CommonTypes.Structs;
 
 namespace Aaru.Filesystems;
 
@@ -43,13 +44,15 @@ public sealed partial class AppleHFSPlus : IReadOnlyFilesystem
 
     /// <summary>Catalog B-Tree header information</summary>
     BTHeaderRec _catalogBTreeHeader;
-
-    /// <summary>Media image plugin reference</summary>
+    /// <summary>Cached directory entries by CNID, each entry keyed by filename</summary>
     Dictionary<uint, Dictionary<string, CatalogEntry>> _directoryCaches;
 
     /// <summary>Extents Overflow File B-Tree header information</summary>
     BTHeaderRec _extentsFileHeader;
 
+    /// <summary>Filesystem information</summary>
+    FileSystemInfo _fileSystemInfo;
+
     /// <summary>Media image plugin reference</summary>
     IMediaImage _imagePlugin;
 

Aaru.Filesystems/AppleHFSPlus/Mount.cs

@@ -34,6 +34,7 @@ using System.Text;
 using Aaru.CommonTypes.AaruMetadata;
 using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
+using Aaru.CommonTypes.Structs;
 using Aaru.Helpers;
 using Aaru.Logging;
 using Partition = Aaru.CommonTypes.Partition;
@@ -528,5 +529,21 @@ public sealed partial class AppleHFSPlus
         // Create volume serial from Finder info fields
         if(_volumeHeader.drFndrInfo6 != 0 && _volumeHeader.drFndrInfo7 != 0)
             Metadata.VolumeSerial = $"{_volumeHeader.drFndrInfo6:X8}{_volumeHeader.drFndrInfo7:X8}";
+
+        // Create FileSystemInfo for StatFs
+        _fileSystemInfo = new FileSystemInfo
+        {
+            Type           = Metadata.Type,
+            Blocks         = _volumeHeader.totalBlocks,
+            Files          = _volumeHeader.fileCount,
+            FreeBlocks     = _volumeHeader.freeBlocks,
+            FilenameLength = 255, // HFS+ supports up to 255 character UTF-16 names
+            PluginId       = Id,
+            Id = new FileSystemId
+            {
+                IsLong   = true,
+                Serial64 = (ulong)_volumeHeader.drFndrInfo6 << 32 | _volumeHeader.drFndrInfo7
+            }
+        };
     }
 }

Aaru.Filesystems/AppleHFSPlus/Super.cs

@@ -0,0 +1,49 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : Super.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Apple Hierarchical File System Plus plugin.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2026 Natalia Portillo
+// ****************************************************************************/
+
+using Aaru.CommonTypes.Enums;
+using Aaru.CommonTypes.Structs;
+
+namespace Aaru.Filesystems;
+
+// Information from Apple TechNote 1150: https://developer.apple.com/legacy/library/technotes/tn/tn1150.html
+/// <summary>Implements detection of Apple Hierarchical File System Plus (HFS+)</summary>
+public sealed partial class AppleHFSPlus
+{
+    /// <inheritdoc />
+    public ErrorNumber StatFs(out FileSystemInfo stat)
+    {
+        stat = null;
+
+        if(!_mounted) return ErrorNumber.AccessDenied;
+
+        stat = _fileSystemInfo;
+
+        return ErrorNumber.NoError;
+    }
+}

Aaru.Filesystems/AppleHFSPlus/Unimplemented.cs

@@ -29,7 +29,6 @@
 using System;
 using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
-using Aaru.CommonTypes.Structs;
 
 namespace Aaru.Filesystems;
 
@@ -42,9 +41,6 @@ public sealed partial class AppleHFSPlus
     public ErrorNumber Unmount() => throw new NotImplementedException();
 
 
-    /// <inheritdoc />
-    public ErrorNumber StatFs(out FileSystemInfo stat) => throw new NotImplementedException();
-
     /// <inheritdoc />
     public ErrorNumber ReadLink(string path, out string dest) => throw new NotImplementedException();