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diff --git a/generic/tclFileSystem.h b/generic/tclFileSystem.h
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+/*
+ * tclFileSystem.h --
+ *
+ *	This file contains the common defintions and prototypes for use by
+ *	Tcl's filesystem and path handling layers.
+ *
+ * Copyright (c) 2003 Vince Darley.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id: tclFileSystem.h,v 1.11 2005/10/13 00:07:17 dkf Exp $
+ */
+
+#ifndef _TCLFILESYSTEM
+#define _TCLFILESYSTEM
+
+#include "tcl.h"
+
+/*
+ * struct FilesystemRecord --
+ *
+ * A filesystem record is used to keep track of each filesystem currently
+ * registered with the core, in a linked list. Pointers to these structures
+ * are also kept by each "path" Tcl_Obj, and we must retain a refCount on the
+ * number of such references.
+ */
+
+typedef struct FilesystemRecord {
+    ClientData clientData;	/* Client specific data for the new filesystem
+				 * (can be NULL) */
+    Tcl_Filesystem *fsPtr;	/* Pointer to filesystem dispatch table. */
+    int fileRefCount;		/* How many Tcl_Obj's use this filesystem. */
+    struct FilesystemRecord *nextPtr;
+				/* The next filesystem registered to Tcl, or
+				 * NULL if no more. */
+    struct FilesystemRecord *prevPtr;
+				/* The previous filesystem registered to Tcl,
+				 * or NULL if no more. */
+} FilesystemRecord;
+
+/*
+ * This structure holds per-thread private copy of the current directory
+ * maintained by the global cwdPathPtr. This structure holds per-thread
+ * private copies of some global data. This way we avoid most of the
+ * synchronization calls which boosts performance, at cost of having to update
+ * this information each time the corresponding epoch counter changes.
+ */
+
+typedef struct ThreadSpecificData {
+    int initialized;
+    int cwdPathEpoch;
+    int filesystemEpoch;
+    Tcl_Obj *cwdPathPtr;
+    ClientData cwdClientData;
+    FilesystemRecord *filesystemList;
+} ThreadSpecificData;
+
+/*
+ * The internal TclFS API provides routines for handling and manipulating
+ * paths efficiently, taking direct advantage of the "path" Tcl_Obj type.
+ *
+ * These functions are not exported at all at present.
+ */
+
+MODULE_SCOPE int	TclFSCwdPointerEquals(Tcl_Obj **pathPtrPtr);
+MODULE_SCOPE int	TclFSMakePathFromNormalized(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, ClientData clientData);
+MODULE_SCOPE int	TclFSNormalizeToUniquePath(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, int startAt,
+			    ClientData *clientDataPtr);
+MODULE_SCOPE Tcl_Obj *	TclFSMakePathRelative(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, Tcl_Obj *cwdPtr);
+MODULE_SCOPE Tcl_Obj *	TclFSInternalToNormalized(
+			    Tcl_Filesystem *fromFilesystem,
+			    ClientData clientData,
+			    FilesystemRecord **fsRecPtrPtr);
+MODULE_SCOPE int	TclFSEnsureEpochOk(Tcl_Obj *pathPtr,
+			    Tcl_Filesystem **fsPtrPtr);
+MODULE_SCOPE void	TclFSSetPathDetails(Tcl_Obj *pathPtr,
+			    FilesystemRecord *fsRecPtr,
+			    ClientData clientData);
+MODULE_SCOPE Tcl_Obj *	TclFSNormalizeAbsolutePath(Tcl_Interp *interp,
+			    Tcl_Obj *pathPtr, ClientData *clientDataPtr);
+
+/*
+ * Private shared variables for use by tclIOUtil.c and tclPathObj.c
+ */
+
+MODULE_SCOPE Tcl_Filesystem tclNativeFilesystem;
+MODULE_SCOPE Tcl_ThreadDataKey tclFsDataKey;
+
+/*
+ * Private shared functions for use by tclIOUtil.c, tclPathObj.c and
+ * tclFileName.c, and any platform-specific filesystem code.
+ */
+
+MODULE_SCOPE Tcl_PathType TclFSGetPathType(Tcl_Obj *pathPtr,
+			    Tcl_Filesystem **filesystemPtrPtr,
+			    int *driveNameLengthPtr);
+MODULE_SCOPE Tcl_PathType TclFSNonnativePathType(CONST char *pathPtr,
+			    int pathLen, Tcl_Filesystem **filesystemPtrPtr,
+			    int *driveNameLengthPtr, Tcl_Obj **driveNameRef);
+MODULE_SCOPE Tcl_PathType TclGetPathType(Tcl_Obj *pathPtr,
+			    Tcl_Filesystem **filesystemPtrPtr,
+			    int *driveNameLengthPtr, Tcl_Obj **driveNameRef);
+MODULE_SCOPE int	TclFSEpochOk(int filesystemEpoch);
+MODULE_SCOPE int	TclFSCwdIsNative(void);
+MODULE_SCOPE Tcl_Obj *	TclWinVolumeRelativeNormalize(Tcl_Interp *interp,
+			    CONST char *path, Tcl_Obj **useThisCwdPtr);
+
+MODULE_SCOPE Tcl_FSPathInFilesystemProc TclNativePathInFilesystem;
+MODULE_SCOPE Tcl_FSCreateInternalRepProc TclNativeCreateNativeRep;
+
+#endif /* _TCLFILESYSTEM */
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */