+#ifdef HAVE_SGI_SAVER_EXTENSION
+extern Bool query_sgi_saver_extension (saver_info *);
+#endif
+
+/* Display Power Management System (DPMS) interface. */
+extern Bool monitor_powered_on_p (saver_info *si);
+extern void monitor_power_on (saver_info *si);
+
+
+/* =======================================================================
+ blanking
+ ======================================================================= */
+
+extern void initialize_screensaver_window (saver_info *si);
+extern void raise_window (saver_info *si,
+ Bool inhibit_fade, Bool between_hacks_p,
+ Bool dont_clear);
+extern void blank_screen (saver_info *si);
+extern void unblank_screen (saver_info *si);
+extern void grab_keyboard_and_mouse (saver_info *si, Window, Cursor);
+extern void ungrab_keyboard_and_mouse (saver_info *si);
+
+/* =======================================================================
+ locking
+ ======================================================================= */
+
+#ifndef NO_LOCKING
+extern Bool unlock_p (saver_info *si);
+extern create_passwd_dialog (Widget, Visual *, Colormap);
+extern Bool lock_init (int argc, char **argv);
+extern Bool passwd_valid_p (const char *typed_passwd);
+#endif
+
+/* =======================================================================
+ demoing
+ ======================================================================= */
+
+#ifndef NO_DEMO_MODE
+extern void demo_mode (saver_info *si);
+extern void demo_mode_restart_process (saver_info *si);
+extern create_demo_dialog (Widget, Visual *, Colormap);
+extern create_resources_dialog (Widget, Visual *, Colormap);
+#endif
+
+#if !defined(NO_LOCKING) || !defined(NO_DEMO_MODE)
+extern void pop_up_dialog_box (Widget dialog, Widget form, int where);
+extern void format_into_label (Widget label, const char *arg);
+extern void steal_focus_and_colormap (Widget dialog);
+#endif
+
+#ifdef HAVE_MOTIF
+extern void disable_motif_drag_and_drop(Widget w);
+#endif
+
+
+/* =======================================================================
+ timers
+ ======================================================================= */
+
+extern void start_notice_events_timer (saver_info *, Window);
+extern void cycle_timer (XtPointer si, XtIntervalId *id);
+extern void activate_lock_timer (XtPointer si, XtIntervalId *id);
+extern void reset_watchdog_timer (saver_info *si, Bool on_p);
+extern void idle_timer (XtPointer si, XtIntervalId *id);
+extern void sleep_until_idle (saver_info *si, Bool until_idle_p);
+
+/* =======================================================================
+ remote control
+ ======================================================================= */
+
+extern Bool handle_clientmessage (saver_info *, XEvent *, Bool);
+
+/* =======================================================================
+ subprocs
+ ======================================================================= */
+
+extern void hack_environment (saver_info *si);
+extern void init_sigchld (void);
+extern void spawn_screenhack (saver_info *si, Bool first_time_p);
+extern void kill_screenhack (saver_info *si);
+extern void suspend_screenhack (saver_info *si, Bool suspend_p);
+extern Bool screenhack_running_p (saver_info *si);
+extern void emergency_kill_subproc (saver_info *si);
+extern Bool select_visual (saver_screen_info *ssi, const char *visual_name);
+extern const char *signal_name (int signal);
+
+/* =======================================================================
+ subprocs security
+ ======================================================================= */