diff -r 000000000000 -r 7f656887cf89 core/builtins/fuser.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/builtins/fuser.cpp	Wed Jun 23 15:52:26 2010 +0100
@@ -0,0 +1,146 @@
+// fuser.cpp
+// 
+// Copyright (c) 2005 - 2010 Accenture. All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+// 
+// Initial Contributors:
+// Accenture - Initial contribution
+//
+
+#include "fuser.h"
+#include <f32file.h>
+
+
+CCommandBase* CCmdFileUser::NewLC()
+	{
+	CCmdFileUser* self = new(ELeave) CCmdFileUser();
+	CleanupStack::PushL(self);
+	self->BaseConstructL();
+	return self;
+	}
+
+CCmdFileUser::~CCmdFileUser()
+	{
+	iFiles.Close();
+	}
+
+CCmdFileUser::CCmdFileUser()
+	{
+	}
+
+const TDesC& CCmdFileUser::Name() const
+	{
+	_LIT(KName, "fuser");
+	return KName;
+	}
+
+void CCmdFileUser::DoRunL()
+	{
+	const TInt numFiles = iFiles.Count();
+	if (numFiles == 0)
+		{
+		PrintAllUsersL();
+		}
+	else
+		{
+		for (TInt i = 0; i < numFiles; ++i)
+			{
+			PrintUsersL(iFiles[i]);
+			}
+		}
+	}
+
+void CCmdFileUser::PrintAllUsersL()
+	{
+	TOpenFileScan openFileScanner(FsL());
+	CFileList* fileList = NULL;
+	FOREVER
+		{
+		openFileScanner.NextL(fileList);
+		if (fileList == NULL)
+			{
+			break;
+			}
+		CleanupStack::PushL(fileList);
+		const TInt numOpenFiles = fileList->Count();
+		for (TInt i = 0; i < numOpenFiles; ++i)
+			{
+			const TEntry& entry = (*fileList)[i];
+			Printf(_L("%S: \r\n"), &entry.iName);
+			TThreadId threadId(openFileScanner.ThreadId());
+			RThread thread;
+			TInt err = thread.Open(threadId);
+			if (err)
+				{
+				Printf(_L("\tError %d opening thread id %u\r\n"), err, (TUint)threadId);
+				}
+			else
+				{
+				TFullName name(thread.FullName());
+				thread.Close();
+				Printf(_L("\t%S (%u)\r\n"), &name, (TUint)threadId);
+				}
+			}
+		CleanupStack::PopAndDestroy(fileList);
+		}
+	}
+
+void CCmdFileUser::PrintUsersL(const TDesC& aFileName)
+	{
+	Printf(_L("%S: \r\n"), &aFileName);
+	TOpenFileScan openFileScanner(FsL());
+	CFileList* fileList = NULL;
+	TBool userFound(EFalse);
+	FOREVER
+		{
+		openFileScanner.NextL(fileList);
+		if (fileList == NULL)
+			{
+			break;
+			}
+		CleanupStack::PushL(fileList);
+		const TInt numOpenFiles = fileList->Count();
+		for (TInt i = 0; i < numOpenFiles; ++i)
+			{
+			const TEntry& entry = (*fileList)[i];
+			if (entry.iName.MatchF(aFileName.Mid(2)) != KErrNotFound) // Note entry.iName doesn't have a drive letter, hence the Mid(2).
+				{
+				userFound = ETrue;
+				TThreadId threadId(openFileScanner.ThreadId());
+				RThread thread;
+				TInt err = thread.Open(threadId);
+				if (err)
+					{
+					Printf(_L("\tError %d opening thread id %u\r\n"), err, (TUint)threadId);
+					}
+				else
+					{
+					TFullName name(thread.FullName());
+					thread.Close();
+					Printf(_L("\t%S (%u)\r\n"), &name, (TUint)threadId);
+					}
+				break;
+				}
+			}
+		CleanupStack::PopAndDestroy(fileList);
+		}
+
+	if (!userFound)
+		{
+		Write(_L("\tNo users"));
+		}
+	}
+
+void CCmdFileUser::ArgumentsL(RCommandArgumentList& aArguments)
+	{
+	_LIT(KArgFiles, "file_name");
+	aArguments.AppendFileNameL(iFiles, KArgFiles);
+	}
+
+
+#ifdef EXE_BUILD
+EXE_BOILER_PLATE(CCmdFileUser)
+#endif