+/* Display Power Management System (DPMS) interface. */
+extern Bool monitor_powered_on_p (saver_info *si);
+extern void monitor_power_on (saver_info *si, Bool on_p);
+
+
+/* =======================================================================
+ blanking
+ ======================================================================= */
+
+extern Bool update_screen_layout (saver_info *si);
+extern void initialize_screensaver_window (saver_info *si);
+extern void initialize_screen_root_widget (saver_screen_info *ssi);
+
+extern void raise_window (saver_info *si,
+ Bool inhibit_fade, Bool between_hacks_p,
+ Bool dont_clear);
+extern Bool blank_screen (saver_info *si);
+extern void unblank_screen (saver_info *si);
+extern void resize_screensaver_window (saver_info *si);
+
+extern void get_screen_viewport (saver_screen_info *ssi,
+ int *x_ret, int *y_ret,
+ int *w_ret, int *h_ret,
+ int target_x, int target_y,
+ Bool verbose_p);
+
+
+/* =======================================================================
+ locking
+ ======================================================================= */
+
+#ifndef NO_LOCKING
+extern Bool unlock_p (saver_info *si);
+extern Bool lock_priv_init (int argc, char **argv, Bool verbose_p);
+extern Bool lock_init (int argc, char **argv, Bool verbose_p);
+extern Bool passwd_valid_p (const char *typed_passwd, Bool verbose_p);
+#endif /* NO_LOCKING */
+
+extern void set_locked_p (saver_info *si, Bool locked_p);
+extern int move_mouse_grab (saver_info *si, Window to, Cursor cursor,
+ int to_screen_no);
+extern int mouse_screen (saver_info *si);
+
+
+/* =======================================================================
+ runtime privileges
+ ======================================================================= */
+
+extern void hack_uid (saver_info *si);
+extern void describe_uids (saver_info *si, FILE *out);
+
+/* =======================================================================
+ demoing
+ ======================================================================= */
+
+extern void draw_shaded_rectangle (Display *dpy, Window window,
+ int x, int y,
+ int width, int height,
+ int thickness,
+ unsigned long top_color,
+ unsigned long bottom_color);
+extern int string_width (XFontStruct *font, char *s);
+
+extern void make_splash_dialog (saver_info *si);
+extern void handle_splash_event (saver_info *si, XEvent *e);
+
+
+/* =======================================================================
+ timers
+ ======================================================================= */
+
+extern void start_notice_events_timer (saver_info *, Window, Bool verbose_p);
+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 de_race_timer (XtPointer si, XtIntervalId *id);
+extern void sleep_until_idle (saver_info *si, Bool until_idle_p);
+extern void reset_timers (saver_info *si);
+extern void schedule_wakeup_event (saver_info *si, Time when, Bool verbose_p);
+
+
+/* =======================================================================
+ remote control
+ ======================================================================= */
+
+extern Bool handle_clientmessage (saver_info *, XEvent *, Bool);
+extern void maybe_reload_init_file (saver_info *);
+
+/* =======================================================================
+ subprocs
+ ======================================================================= */
+
+extern void handle_signals (saver_info *si);
+#ifdef HAVE_SIGACTION
+ extern sigset_t block_sigchld (void);
+#else /* !HAVE_SIGACTION */
+ extern int block_sigchld (void);
+#endif /* !HAVE_SIGACTION */
+extern void unblock_sigchld (void);
+extern void hack_environment (saver_info *si);
+extern void hack_subproc_environment (Screen *, Window saver_window);
+extern void init_sigchld (void);
+extern void spawn_screenhack (saver_screen_info *ssi);
+extern pid_t fork_and_exec (saver_screen_info *ssi, const char *command);
+extern void kill_screenhack (saver_screen_info *ssi);
+extern void suspend_screenhack (saver_screen_info *ssi, 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 void store_saver_status (saver_info *si);
+extern const char *signal_name (int signal);
+
+/* =======================================================================
+ subprocs diagnostics
+ ======================================================================= */