LightlessSync/FileCache/FileCompactor.cs

@@ -138,7 +138,7 @@ public sealed class FileCompactor : IDisposable
         _compactionCts.Cancel();
         try
         {
-            if (!_compactionWorker.Wait(TimeSpan.FromSeconds(5)))
+            if (!_compactionWorker.Wait(TimeSpan.FromSeconds(5), _compactionCts.Token))
             {
                 _logger.LogDebug("Compaction worker did not shut down within timeout");
             }
@@ -463,10 +463,32 @@ public sealed class FileCompactor : IDisposable
 
     private static bool IsWOFCompactedFile(string filePath)
     {
-        uint buf = 8;
-        _ = WofIsExternalFile(filePath, out int isExtFile, out uint _, out var info, ref buf);
-        if (isExtFile == 0) return false;
-        return info.Algorithm == CompressionAlgorithm.XPRESS8K;
+        try
+        {
+            uint buf = (uint)Marshal.SizeOf<WOF_FILE_COMPRESSION_INFO_V1>();
+            int result = WofIsExternalFile(filePath, out int isExternal, out uint _, out var info, ref buf);
+
+            if (result != 0 || isExternal == 0)
+                return false;
+
+            return info.Algorithm == CompressionAlgorithm.XPRESS8K || info.Algorithm == CompressionAlgorithm.XPRESS4K
+                || info.Algorithm == CompressionAlgorithm.XPRESS16K || info.Algorithm == CompressionAlgorithm.LZX;
+        }
+        catch (DllNotFoundException)
+        {
+            // WofUtil.dll not available
+            return false;
+        }
+        catch (EntryPointNotFoundException)
+        {
+            // Running under Wine or non-NTFS systems
+            return false;
+        }
+        catch (Exception)
+        {
+            // Exception happened
+            return false;
+        }
     }
 
     private bool IsBtrfsCompressedFile(string path)