Index: Makefile
==================================================================
--- Makefile
+++ Makefile
@@ -3,19 +3,19 @@
 example.c: $(shell find example -type f) $(shell find lib -type f) xvfs.c.rvt xvfs-create Makefile
 	./xvfs-create --directory example --name example > example.c.new
 	mv example.c.new example.c
 
 example.o: example.c xvfs-core.h Makefile
-	cc -Wall -I. -o example.o -c example.c
+	cc -fPIC -Wall -I. -o example.o -c example.c
 
 example.so: example.o Makefile
-	cc -shared -o example.so example.o
+	cc -fPIC -shared -o example.so example.o
 
-test:
-	@echo not implemented
+test: example.so
+	echo 'load ./example.so Xvfs_example; puts OK' | tclsh | grep '^OK$$'
 
 clean:
 	rm -f example.so example.o example.c
 
 distclean: clean
 
 .PHONY: all clean distclean test

Index: xvfs-core.h
==================================================================
--- xvfs-core.h
+++ xvfs-core.h
@@ -1,6 +1,13 @@
 #ifndef XVFS_COMMON_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817
 #define XVFS_COMMON_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817 1
+
+#include <tcl.h>
 
 #define XVFS_PROTOCOL_VERSION 1
 
+typedef const char **(*xvfs_proc_getChildren_t)(const char *path, Tcl_WideInt limit);
+typedef const unsigned char *(*xvfs_proc_getData_t)(const char *path, Tcl_WideInt start, Tcl_WideInt length);
+
+int Xvfs_Register(const char *fsName, int protocolVersion, xvfs_proc_getChildren_t getChildrenProc, xvfs_proc_getData_t getData);
+
 #endif

Index: xvfs.c.rvt
==================================================================
--- xvfs.c.rvt
+++ xvfs.c.rvt
@@ -20,13 +20,22 @@
 	package require xvfs
 	xvfs::main $argv
 ?>
 
 static const char **xvfs_<?= $::xvfs::fsName ?>_getChildren(const char *path, Tcl_WideInt limit) {
+	return(NULL);
 }
 
 static const unsigned char *xvfs_<?= $::xvfs::fsName ?>_getData(const char *path, Tcl_WideInt start, Tcl_WideInt length) {
+	return(NULL);
 }
 
 int Xvfs_<?= $::xvfs::fsName ?>_Init() {
-	// Init->Register("<?= $::xvfs::fsName ?>", XVFS_PROTOCOL_VERSION, xvfs_<?= $::xvfs::fsName ?>_getChildren, xvfs_<?= $::xvfs::fsName ?>_getData)
+	int register_ret;
+	
+	register_ret = Xvfs_Register("<?= $::xvfs::fsName ?>", XVFS_PROTOCOL_VERSION, xvfs_<?= $::xvfs::fsName ?>_getChildren, xvfs_<?= $::xvfs::fsName ?>_getData);
+	if (register_ret != TCL_OK) {
+		return(register_ret);
+	}
+	
+	return(TCL_OK);
 }