[BeOFS] Implement xattr operations.

Aaru.Filesystems/BOFS/Unimplemented.cs

@@ -52,11 +52,6 @@ public sealed partial class BOFS
     /// <inheritdoc />
     public ErrorNumber GetAttributes(string path, out FileAttributes attributes) => throw new NotImplementedException();
 
-    /// <inheritdoc />
-    public ErrorNumber ListXAttr(string path, out List<string> xattrs) => throw new NotImplementedException();
-
-    /// <inheritdoc />
-    public ErrorNumber GetXattr(string path, string xattr, ref byte[] buf) => throw new NotImplementedException();
 
     /// <inheritdoc />
     public ErrorNumber StatFs(out FileSystemInfo stat) => throw new NotImplementedException();

Aaru.Filesystems/BOFS/Xattr.cs

@@ -0,0 +1,91 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : Xattr.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : BeOS old filesystem 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 System;
+using System.Collections.Generic;
+using Aaru.CommonTypes.Enums;
+
+namespace Aaru.Filesystems;
+
+public sealed partial class BOFS
+{
+    /// <inheritdoc />
+    public ErrorNumber ListXAttr(string path, out List<string> xattrs)
+    {
+        xattrs = [];
+
+        if(string.IsNullOrEmpty(path) || path == "/")
+        {
+            // Root directory - no xattrs
+            return ErrorNumber.NoError;
+        }
+
+        lock(_rootDirectoryCache)
+        {
+            if(!_rootDirectoryCache.TryGetValue(path.TrimStart('/'), out FileEntry entry))
+                return ErrorNumber.NoSuchFile;
+
+            // Expose FileType as xattr only if it's not 0 or -1
+            if(entry.FileType != 0 && entry.FileType != -1) xattrs.Add("com.be.filetype");
+
+            return ErrorNumber.NoError;
+        }
+    }
+
+    /// <inheritdoc />
+    public ErrorNumber GetXattr(string path, string xattr, ref byte[] buf)
+    {
+        if(string.IsNullOrEmpty(path) || path == "/" || xattr != "com.be.filetype")
+            return ErrorNumber.NoSuchExtendedAttribute;
+
+        lock(_rootDirectoryCache)
+        {
+            if(!_rootDirectoryCache.TryGetValue(path.TrimStart('/'), out FileEntry entry))
+                return ErrorNumber.NoSuchFile;
+
+            // Don't expose FileType if it's 0 or -1
+            if(entry.FileType == 0 || entry.FileType == -1) return ErrorNumber.NoSuchExtendedAttribute;
+
+            // FileType is 4 bytes (int), export as-is without endian conversion
+            byte[] fileTypeBytes = BitConverter.GetBytes(entry.FileType);
+
+            if(buf == null)
+            {
+                buf = fileTypeBytes;
+
+                return ErrorNumber.NoError;
+            }
+
+            if(buf.Length < fileTypeBytes.Length) return ErrorNumber.InvalidArgument;
+
+            Array.Copy(fileTypeBytes, buf, fileTypeBytes.Length);
+
+            return ErrorNumber.NoError;
+        }
+    }
+}