-/* in echo.c */
-extern int do_echo (const char *cmd, int argc, char *argv[]);
-
-/* in edit.c */
-extern int do_edit (const char *cmd, int argc, char *argv[]);
-
-/* in lcd.c */
-extern int do_lcd (const char *cmd, int argc, char *argv[]);
-
-/* in glob.c */
-extern int do_glob (const char *cmd, int argc, char *argv[]);
-
-/* in man.c */
-extern int do_man (const char *cmd, int argc, char *argv[]);
-
-/* in more.c */
-extern int do_more (const char *cmd, int argc, char *argv[]);