[bfs] Implement statfs.

Aaru.Filesystems/UNIXBFS/Super.cs

@@ -0,0 +1,84 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : Super.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : UnixWare boot 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 Aaru.CommonTypes.Enums;
+using Aaru.CommonTypes.Structs;
+using Aaru.Logging;
+
+namespace Aaru.Filesystems;
+
+/// <inheritdoc />
+public sealed partial class BFS
+{
+    /// <inheritdoc />
+    public ErrorNumber StatFs(out FileSystemInfo stat)
+    {
+        stat = null;
+
+        if(!_mounted) return ErrorNumber.AccessDenied;
+
+        AaruLogging.Debug(MODULE_NAME, "StatFs: returning filesystem statistics");
+
+        // Calculate total blocks and free blocks
+        uint totalBlocks = (_superblock.s_end     + 1)                   / BFS_BSIZE;
+        uint freeBlocks  = (_superblock.s_end + 1 - _superblock.s_start) / BFS_BSIZE;
+
+        // Count free inodes
+        uint freeInodes = 0;
+
+        for(uint i = BFS_ROOT_INO; i <= _lastInode; i++)
+        {
+            if(!_inodeCache.ContainsKey(i))
+            {
+                ErrorNumber errno = ReadInode(i, out Inode inode);
+
+                if(errno == ErrorNumber.NoError && inode.i_ino == 0) freeInodes++;
+            }
+        }
+
+        stat = new FileSystemInfo
+        {
+            Blocks         = totalBlocks,
+            FreeBlocks     = freeBlocks,
+            Files          = _lastInode - BFS_ROOT_INO + 1,
+            FreeFiles      = freeInodes,
+            FilenameLength = BFS_NAMELEN,
+            Type           = FS_TYPE,
+            PluginId       = Id
+        };
+
+        AaruLogging.Debug(MODULE_NAME,
+                          "StatFs complete: blocks={0}, freeBlocks={1}, files={2}, freeFiles={3}",
+                          totalBlocks,
+                          freeBlocks,
+                          stat.Files,
+                          freeInodes);
+
+        return ErrorNumber.NoError;
+    }
+}

Aaru.Filesystems/UNIXBFS/Unimplemented.cs

@@ -29,7 +29,6 @@
 using System;
 using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
-using Aaru.CommonTypes.Structs;
 
 namespace Aaru.Filesystems;
 
@@ -38,9 +37,6 @@ namespace Aaru.Filesystems;
 /// <summary>Implements the UNIX boot filesystem</summary>
 public sealed partial class BFS
 {
-    /// <inheritdoc />
-    public ErrorNumber StatFs(out FileSystemInfo stat) => throw new NotImplementedException();
-
     /// <inheritdoc />
     public ErrorNumber OpenFile(string path, out IFileNode node) => throw new NotImplementedException();