-/* in copy.c */
-extern int run_copy_in (const char *cmd, size_t argc, char *argv[]);
-extern int run_copy_out (const char *cmd, size_t argc, char *argv[]);
-
-/* in display.c */
-extern int run_display (const char *cmd, size_t argc, char *argv[]);
-
-/* in echo.c */
-extern int run_echo (const char *cmd, size_t argc, char *argv[]);
-
-/* in edit.c */
-extern int run_edit (const char *cmd, size_t argc, char *argv[]);
-