1 /* xscreensaver, Copyright (c) 1991-1997 Jamie Zawinski <jwz@netscape.com>
3 * Permission to use, copy, modify, distribute, and sell this software and its
4 * documentation for any purpose is hereby granted without fee, provided that
5 * the above copyright notice appear in all copies and that both that
6 * copyright notice and this permission notice appear in supporting
7 * documentation. No representations are made about the suitability of this
8 * software for any purpose. It is provided "as is" without express or
12 /* ========================================================================
13 * First we wait until the keyboard and mouse become idle for the specified
14 * amount of time. We do this in one of three different ways: periodically
15 * checking with the XIdle server extension; selecting key and mouse events
16 * on (nearly) all windows; or by waiting for the MIT-SCREEN-SAVER extension
17 * to send us a "you are idle" event.
19 * Then, we map a full screen black window (or, in the case of the
20 * MIT-SCREEN-SAVER extension, use the one it gave us.)
22 * We place a __SWM_VROOT property on this window, so that newly-started
23 * clients will think that this window is a "virtual root" window.
25 * If there is an existing "virtual root" window (one that already had
26 * an __SWM_VROOT property) then we remove that property from that window.
27 * Otherwise, clients would see that window (the real virtual root) instead
28 * of ours (the impostor.)
30 * Then we pick a random program to run, and start it. Two assumptions
31 * are made about this program: that it has been specified with whatever
32 * command-line options are necessary to make it run on the root window;
33 * and that it has been compiled with vroot.h, so that it is able to find
34 * the root window when a virtual-root window manager (or this program) is
37 * Then, we wait for keyboard or mouse events to be generated on the window.
38 * When they are, we kill the inferior process, unmap the window, and restore
39 * the __SWM_VROOT property to the real virtual root window if there was one.
41 * While we are waiting, we also set up timers so that, after a certain
42 * amount of time has passed, we can start a different screenhack. We do
43 * this by killing the running child process with SIGTERM, and then starting
44 * a new one in the same way.
46 * If there was a real virtual root, meaning that we removed the __SWM_VROOT
47 * property from it, meaning we must (absolutely must) restore it before we
48 * exit, then we set up signal handlers for most signals (SIGINT, SIGTERM,
49 * etc.) that do this. Most Xlib and Xt routines are not reentrant, so it
50 * is not generally safe to call them from signal handlers; however, this
51 * program spends most of its time waiting, so the window of opportunity
52 * when code could be called reentrantly is fairly small; and also, the worst
53 * that could happen is that the call would fail. If we've gotten one of
54 * these signals, then we're on our way out anyway. If we didn't restore the
55 * __SWM_VROOT property, that would be very bad, so it's worth a shot. Note
56 * that this means that, if you're using a virtual-root window manager, you
57 * can really fuck up the world by killing this process with "kill -9".
59 * This program accepts ClientMessages of type SCREENSAVER; these messages
60 * may contain the atom ACTIVATE or DEACTIVATE, meaning to turn the
61 * screensaver on or off now, regardless of the idleness of the user,
62 * and a few other things. The included "xscreensaver_command" program
63 * sends these messsages.
65 * If we don't have the XIdle, MIT-SCREEN-SAVER, or SGI SCREEN_SAVER
66 * extensions, then we do the XAutoLock trick: notice every window that
67 * gets created, and wait 30 seconds or so until its creating process has
68 * settled down, and then select KeyPress events on those windows which
69 * already select for KeyPress events. It's important that we not select
70 * KeyPress on windows which don't select them, because that would
71 * interfere with event propagation. This will break if any program
72 * changes its event mask to contain KeyRelease or PointerMotion more than
73 * 30 seconds after creating the window, but that's probably pretty rare.
75 * The reason that we can't select KeyPresses on windows that don't have
76 * them already is that, when dispatching a KeyPress event, X finds the
77 * lowest (leafmost) window in the hierarchy on which *any* client selects
78 * for KeyPress, and sends the event to that window. This means that if a
79 * client had a window with subwindows, and expected to receive KeyPress
80 * events on the parent window instead of the subwindows, then that client
81 * would malfunction if some other client selected KeyPress events on the
82 * subwindows. It is an incredible misdesign that one client can make
83 * another client malfunction in this way.
85 * To detect mouse motion, we periodically wake up and poll the mouse
86 * position and button/modifier state, and notice when something has
87 * changed. We make this check every five seconds by default, and since the
88 * screensaver timeout has a granularity of one minute, this makes the
89 * chance of a false positive very small. We could detect mouse motion in
90 * the same way as keyboard activity, but that would suffer from the same
91 * "client changing event mask" problem that the KeyPress events hack does.
92 * I think polling is more reliable.
94 * None of this crap happens if we're using one of the extensions, so install
95 * one of them if the description above sounds just too flaky to live. It
96 * is, but those are your choices.
98 * A third idle-detection option could be implemented (but is not): when
99 * running on the console display ($DISPLAY is `localhost`:0) and we're on a
100 * machine where /dev/tty and /dev/mouse have reasonable last-modification
101 * times, we could just stat() those. But the incremental benefit of
102 * implementing this is really small, so forget I said anything.
105 * - Have a second terminal handy.
106 * - Be careful where you set your breakpoints, you don't want this to
107 * stop under the debugger with the keyboard grabbed or the blackout
109 * - If you run your debugger under XEmacs, try M-ESC (x-grab-keyboard)
110 * to keep your emacs window alive even when xscreensaver has grabbed.
111 * - Go read the code related to -DDEBUG.
112 * - You probably can't set breakpoints in functions that are called on
113 * the other side of a call to fork() -- if your clients are dying
114 * with signal 5, Trace/BPT Trap, you're losing in this way.
115 * - If you aren't using a server extension, don't leave this stopped
116 * under the debugger for very long, or the X input buffer will get
117 * huge because of the keypress events it's selecting for. This can
118 * make your X server wedge with "no more input buffers."
120 * ======================================================================== */
128 #include <X11/Xlib.h>
129 #include <X11/Xatom.h>
130 #include <X11/Intrinsic.h>
131 #include <X11/StringDefs.h>
132 #include <X11/Shell.h>
136 # include <X11/Xmu/Error.h>
138 # include <Xmu/Error.h>
140 #else /* !HAVE_XMU */
142 #endif /* !HAVE_XMU */
144 #ifdef HAVE_XIDLE_EXTENSION
145 #include <X11/extensions/xidle.h>
146 #endif /* HAVE_XIDLE_EXTENSION */
148 #include "xscreensaver.h"
150 #include "yarandom.h"
151 #include "resources.h"
154 saver_info *global_si_kludge = 0; /* I hate C so much... */
161 static Atom XA_SCREENSAVER;
162 static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV;
163 static Atom XA_EXIT, XA_RESTART, XA_DEMO, XA_LOCK;
166 static XrmOptionDescRec options [] = {
167 { "-timeout", ".timeout", XrmoptionSepArg, 0 },
168 { "-cycle", ".cycle", XrmoptionSepArg, 0 },
169 { "-idelay", ".initialDelay", XrmoptionSepArg, 0 },
170 { "-nice", ".nice", XrmoptionSepArg, 0 },
171 { "-visual", ".visualID", XrmoptionSepArg, 0 },
172 { "-lock-timeout", ".lockTimeout", XrmoptionSepArg, 0 },
173 { "-install", ".installColormap", XrmoptionNoArg, "on" },
174 { "-no-install", ".installColormap", XrmoptionNoArg, "off" },
175 { "-verbose", ".verbose", XrmoptionNoArg, "on" },
176 { "-silent", ".verbose", XrmoptionNoArg, "off" },
177 { "-xidle-extension", ".xidleExtension", XrmoptionNoArg, "on" },
178 { "-no-xidle-extension", ".xidleExtension", XrmoptionNoArg, "off" },
179 { "-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "on" },
180 { "-no-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "off" },
181 { "-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "on" },
182 { "-no-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "off" },
183 { "-lock", ".lock", XrmoptionNoArg, "on" },
184 { "-no-lock", ".lock", XrmoptionNoArg, "off" }
187 static char *defaults[] = {
188 #include "XScreenSaver_ad.h"
193 do_help (saver_info *si)
196 xscreensaver %s, copyright (c) 1991-1997 by Jamie Zawinski <jwz@netscape.com>\n\
197 The standard Xt command-line options are accepted; other options include:\n\
199 -timeout <minutes> When the screensaver should activate.\n\
200 -cycle <minutes> How long to let each hack run.\n\
201 -idelay <seconds> How long to sleep before startup.\n\
202 -visual <id-or-class> Which X visual to run on.\n\
203 -demo Enter interactive demo mode on startup.\n\
204 -install Install a private colormap.\n\
205 -no-install Don't.\n\
208 -xidle-extension Use the R5 XIdle server extension.\n\
209 -no-xidle-extension Don't.\n\
210 -mit-extension Use the R6 MIT_SCREEN_SAVER server extension.\n\
211 -no-mit-extension Don't.\n\
212 -sgi-extension Use the SGI SCREEN-SAVER server extension.\n\
213 -no-sgi-extension Don't.\n\
214 -lock Require a password before deactivating.\n\
216 -lock-timeout <minutes> Grace period before locking; default 0.\n\
217 -help This message.\n\
219 Use the `xscreensaver-command' program to control a running screensaver.\n\
221 The *programs resource controls which graphics demos will be launched by the\n\
222 screensaver. See the man page for more details. For updates, check\n\
223 http://people.netscape.com/jwz/xscreensaver/\n\n",
227 printf ("Support for locking was not enabled at compile-time.\n");
230 printf ("Support for demo mode was not enabled at compile-time.\n");
232 #if !defined(HAVE_XIDLE_EXTENSION) && !defined(HAVE_MIT_SAVER_EXTENSION) && !defined(HAVE_SGI_SAVER_EXTENSION)
233 printf ("Support for the XIDLE, SCREEN_SAVER, and MIT-SCREEN-SAVER server\
234 extensions\nwas not enabled at compile-time.\n");
235 #endif /* !HAVE_XIDLE_EXTENSION && !HAVE_MIT_SAVER_EXTENSION && !HAVE_SGI_SAVER_EXTENSION */
243 reformat_hack(const char *hack)
246 const char *in = hack;
248 char *h2 = (char *) malloc(strlen(in) + indent + 2);
251 while (isspace(*in)) in++; /* skip whitespace */
252 while (!isspace(*in) && *in != ':')
253 *out++ = *in++; /* snarf first token */
254 while (isspace(*in)) in++; /* skip whitespace */
257 *out++ = *in++; /* copy colon */
261 out = h2; /* reset to beginning */
266 while (isspace(*in)) in++; /* skip whitespace */
267 for (i = strlen(h2); i < indent; i++) /* indent */
270 while (*in) *out++ = *in++; /* copy rest of line */
278 get_screenhacks (saver_info *si)
280 saver_preferences *p = &si->prefs;
286 d = get_string_resource ("monoPrograms", "MonoPrograms");
287 if (d && !*d) { free(d); d = 0; }
289 d = get_string_resource ("colorPrograms", "ColorPrograms");
290 if (d && !*d) { free(d); d = 0; }
295 "%s: the `monoPrograms' and `colorPrograms' resources are obsolete;\n\
296 see the manual for details.\n", progname);
300 d = get_string_resource ("programs", "Programs");
303 p->screenhacks = (char **) malloc (sizeof (char *) * hacks_size);
304 p->screenhacks_count = 0;
309 if (d[i] == ' ' || d[i] == '\t' || d[i] == '\n' || d[i] == 0)
314 if (hacks_size <= p->screenhacks_count)
315 p->screenhacks = (char **) realloc (p->screenhacks,
316 (hacks_size = hacks_size * 2) *
318 p->screenhacks [p->screenhacks_count++] = d + i;
319 while (d[i] != 0 && d[i] != '\n')
322 while (i > start && (d[i-1] == ' ' || d[i-1] == '\t'))
328 /* shrink all whitespace to one space, for the benefit of the "demo"
329 mode display. We only do this when we can easily tell that the
330 whitespace is not significant (no shell metachars).
332 for (i = 0; i < p->screenhacks_count; i++)
334 char *s = p->screenhacks [i];
338 for (j = 0; j < L; j++)
342 case '\'': case '"': case '`': case '\\':
348 for (s2 = s+j+1; *s2 == ' ' || *s2 == '\t'; s2++)
351 for (s2 = s + j + 1; *s2; s2++)
357 p->screenhacks[i] = reformat_hack(s); /* mallocs */
360 if (p->screenhacks_count)
362 /* Shrink down the screenhacks array to be only as big as it needs to.
363 This doesn't really matter at all. */
364 p->screenhacks = (char **)
365 realloc (p->screenhacks, ((p->screenhacks_count + 1) *
367 p->screenhacks [p->screenhacks_count] = 0;
371 free (p->screenhacks);
378 get_resources (saver_info *si)
381 saver_preferences *p = &si->prefs;
383 p->verbose_p = get_boolean_resource ("verbose", "Boolean");
384 p->lock_p = get_boolean_resource ("lock", "Boolean");
385 p->fade_p = get_boolean_resource ("fade", "Boolean");
386 p->unfade_p = get_boolean_resource ("unfade", "Boolean");
387 p->fade_seconds = get_seconds_resource ("fadeSeconds", "Time");
388 p->fade_ticks = get_integer_resource ("fadeTicks", "Integer");
389 p->install_cmap_p = get_boolean_resource ("installColormap", "Boolean");
390 p->nice_inferior = get_integer_resource ("nice", "Nice");
392 p->initial_delay = get_seconds_resource ("initialDelay", "Time");
393 p->timeout = 1000 * get_minutes_resource ("timeout", "Time");
394 p->lock_timeout = 1000 * get_minutes_resource ("lockTimeout", "Time");
395 p->cycle = 1000 * get_minutes_resource ("cycle", "Time");
398 p->passwd_timeout = 1000 * get_seconds_resource ("passwdTimeout", "Time");
401 p->pointer_timeout = 1000 * get_seconds_resource ("pointerPollTime", "Time");
402 p->notice_events_timeout = 1000*get_seconds_resource("windowCreationTimeout",
404 p->shell = get_string_resource ("bourneShell", "BourneShell");
407 /* don't set use_xidle_extension unless it is explicitly specified */
408 if ((s = get_string_resource ("xidleExtension", "Boolean")))
409 p->use_xidle_extension = get_boolean_resource ("xidleExtension","Boolean");
411 #ifdef HAVE_XIDLE_EXTENSION /* pick a default */
412 p->use_xidle_extension = True; /* if we have it, use it */
413 #else /* !HAVE_XIDLE_EXTENSION */
414 p->use_xidle_extension = False;
415 #endif /* !HAVE_XIDLE_EXTENSION */
418 /* don't set use_mit_extension unless it is explicitly specified */
419 if ((s = get_string_resource ("mitSaverExtension", "Boolean")))
420 p->use_mit_saver_extension = get_boolean_resource ("mitSaverExtension",
423 #ifdef HAVE_MIT_SAVER_EXTENSION /* pick a default */
424 p->use_mit_saver_extension = False; /* Default false, because it sucks */
425 #else /* !HAVE_MIT_SAVER_EXTENSION */
426 p->use_mit_saver_extension = False;
427 #endif /* !HAVE_MIT_SAVER_EXTENSION */
431 /* don't set use_mit_extension unless it is explicitly specified */
432 if ((s = get_string_resource ("sgiSaverExtension", "Boolean")))
433 p->use_sgi_saver_extension = get_boolean_resource ("sgiSaverExtension",
436 #ifdef HAVE_SGI_SAVER_EXTENSION /* pick a default */
437 p->use_sgi_saver_extension = True; /* if we have it, use it */
438 #else /* !HAVE_SGI_SAVER_EXTENSION */
439 p->use_sgi_saver_extension = False;
440 #endif /* !HAVE_SGI_SAVER_EXTENSION */
444 /* Throttle the various timeouts to reasonable values.
447 if (p->passwd_timeout == 0) p->passwd_timeout = 30000; /* 30 secs */
449 if (p->timeout < 10000) p->timeout = 10000; /* 10 secs */
450 if (p->cycle != 0 && p->cycle < 2000) p->cycle = 2000; /* 2 secs */
451 if (p->pointer_timeout == 0) p->pointer_timeout = 5000; /* 5 secs */
452 if (p->notice_events_timeout == 0)
453 p->notice_events_timeout = 10000; /* 10 secs */
454 if (p->fade_seconds == 0 || p->fade_ticks == 0)
456 if (! p->fade_p) p->unfade_p = False;
458 p->watchdog_timeout = p->cycle;
459 if (p->watchdog_timeout < 30000) p->watchdog_timeout = 30000; /* 30 secs */
460 if (p->watchdog_timeout > 3600000) p->watchdog_timeout = 3600000; /* 1 hr */
463 si->locking_disabled_p = True;
464 si->nolock_reason = "not compiled with locking support";
468 fprintf (stderr, "%s: not compiled with support for locking.\n",
471 #else /* ! NO_LOCKING */
472 if (p->lock_p && si->locking_disabled_p)
474 fprintf (stderr, "%s: locking is disabled (%s).\n", progname,
478 #endif /* ! NO_LOCKING */
480 get_screenhacks (si);
485 XSynchronize(si->dpy, True);
487 p->initial_delay = 0;
496 time_t now = time ((time_t *) 0);
497 char *str = (char *) ctime (&now);
498 char *nl = (char *) strchr (str, '\n');
499 if (nl) *nl = 0; /* take off that dang newline */
503 static void initialize (saver_info *si, int argc, char **argv);
504 static void main_loop (saver_info *si);
507 main (int argc, char **argv)
510 memset(&si, 0, sizeof(si));
511 global_si_kludge = &si; /* I hate C so much... */
512 initialize (&si, argc, argv);
513 main_loop (&si); /* doesn't return */
519 saver_ehandler (Display *dpy, XErrorEvent *error)
521 saver_info *si = global_si_kludge; /* I hate C so much... */
523 fprintf (real_stderr, "\nX error in %s:\n", progname);
524 if (XmuPrintDefaultErrorMessage (dpy, error, real_stderr))
527 fprintf (real_stderr, " (nonfatal.)\n");
532 initialize_connection (saver_info *si, int argc, char **argv)
535 Widget toplevel_shell = XtAppInitialize (&si->app, progclass,
536 options, XtNumber (options),
537 &argc, argv, defaults, 0, 0);
539 si->dpy = XtDisplay (toplevel_shell);
540 si->db = XtDatabase (si->dpy);
541 XtGetApplicationNameAndClass (si->dpy, &progname, &progclass);
543 db = si->db; /* resources.c needs this */
545 if (argc == 2 && !strcmp (argv[1], "-help"))
548 else if (argc == 2 && !strcmp (argv[1], "-debug"))
549 si->prefs.debug_p = True; /* no resource for this one, out of paranoia. */
553 fprintf (stderr, "%s: unknown option %s\n", progname, argv [1]);
559 #endif /* NO_SETUID */
560 XA_VROOT = XInternAtom (si->dpy, "__SWM_VROOT", False);
561 XA_SCREENSAVER = XInternAtom (si->dpy, "SCREENSAVER", False);
562 XA_SCREENSAVER_VERSION = XInternAtom (si->dpy, "_SCREENSAVER_VERSION",False);
563 XA_SCREENSAVER_ID = XInternAtom (si->dpy, "_SCREENSAVER_ID", False);
564 XA_SCREENSAVER_TIME = XInternAtom (si->dpy, "_SCREENSAVER_TIME", False);
565 XA_XSETROOT_ID = XInternAtom (si->dpy, "_XSETROOT_ID", False);
566 XA_ACTIVATE = XInternAtom (si->dpy, "ACTIVATE", False);
567 XA_DEACTIVATE = XInternAtom (si->dpy, "DEACTIVATE", False);
568 XA_RESTART = XInternAtom (si->dpy, "RESTART", False);
569 XA_CYCLE = XInternAtom (si->dpy, "CYCLE", False);
570 XA_NEXT = XInternAtom (si->dpy, "NEXT", False);
571 XA_PREV = XInternAtom (si->dpy, "PREV", False);
572 XA_EXIT = XInternAtom (si->dpy, "EXIT", False);
573 XA_DEMO = XInternAtom (si->dpy, "DEMO", False);
574 XA_LOCK = XInternAtom (si->dpy, "LOCK", False);
576 si->nscreens = ScreenCount(si->dpy);
577 si->screens = (saver_screen_info *)
578 calloc(sizeof(saver_screen_info), si->nscreens);
580 si->default_screen = &si->screens[DefaultScreen(si->dpy)];
582 for (i = 0; i < si->nscreens; i++)
584 saver_screen_info *ssi = &si->screens[i];
586 ssi->screen = ScreenOfDisplay (si->dpy, i);
588 /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
589 ssi->default_visual =
590 get_visual_resource (ssi->screen, "visualID", "VisualID", False);
592 ssi->current_visual = ssi->default_visual;
593 ssi->current_depth = visual_depth (ssi->screen, ssi->current_visual);
595 if (ssi == si->default_screen)
596 /* Since this is the default screen, use the one already created. */
597 ssi->toplevel_shell = toplevel_shell;
599 /* Otherwise, each screen must have its own unmapped root widget. */
600 ssi->toplevel_shell =
601 XtVaAppCreateShell(progname, progclass, applicationShellWidgetClass,
603 XtNscreen, ssi->screen,
604 XtNvisual, ssi->current_visual,
605 XtNdepth, visual_depth(ssi->screen,
606 ssi->current_visual),
613 initialize (saver_info *si, int argc, char **argv)
616 saver_preferences *p = &si->prefs;
617 Bool initial_demo_mode_p = False;
618 si->version = (char *) malloc (5);
619 memcpy (si->version, screensaver_id + 17, 4);
621 progname = argv[0]; /* reset later; this is for the benefit of lock_init() */
624 si->locking_disabled_p = True;
625 si->nolock_reason = "not compiled with locking support";
627 si->locking_disabled_p = False;
630 set_auth_parameters(argc, argv);
633 if (! lock_init (argc, argv)) /* before hack_uid() for proper permissions */
635 si->locking_disabled_p = True;
636 si->nolock_reason = "error getting password";
644 progclass = "XScreenSaver";
646 /* remove -demo switch before saving argv */
647 for (i = 1; i < argc; i++)
648 while (!strcmp ("-demo", argv [i]))
651 initial_demo_mode_p = True;
652 for (j = i; j < argc; j++)
653 argv [j] = argv [j+1];
656 if (argc <= i) break;
658 save_argv (argc, argv);
659 initialize_connection (si, argc, argv);
663 %s %s, copyright (c) 1991-1997 by Jamie Zawinski <jwz@netscape.com>\n\
664 pid = %d.\n", progname, si->version, (int) getpid ());
667 for (i = 0; i < si->nscreens; i++)
668 ensure_no_screensaver_running (si->dpy, si->screens[i].screen);
670 si->demo_mode_p = initial_demo_mode_p;
671 srandom ((int) time ((time_t *) 0));
673 if (p->use_sgi_saver_extension)
675 #ifdef HAVE_SGI_SAVER_EXTENSION
676 if (! query_sgi_saver_extension (si))
679 "%s: display %s does not support the SGI SCREEN_SAVER extension.\n",
680 progname, DisplayString (si->dpy));
681 p->use_sgi_saver_extension = False;
683 else if (p->use_mit_saver_extension)
685 fprintf (stderr, "%s: SGI SCREEN_SAVER extension used instead\
686 of MIT-SCREEN-SAVER extension.\n",
688 p->use_mit_saver_extension = False;
690 else if (p->use_xidle_extension)
693 "%s: SGI SCREEN_SAVER extension used instead of XIDLE extension.\n",
695 p->use_xidle_extension = False;
697 #else /* !HAVE_MIT_SAVER_EXTENSION */
699 "%s: not compiled with support for the SGI SCREEN_SAVER extension.\n",
701 p->use_sgi_saver_extension = False;
702 #endif /* !HAVE_SGI_SAVER_EXTENSION */
705 if (p->use_mit_saver_extension)
707 #ifdef HAVE_MIT_SAVER_EXTENSION
708 if (! query_mit_saver_extension (si))
711 "%s: display %s does not support the MIT-SCREEN-SAVER extension.\n",
712 progname, DisplayString (si->dpy));
713 p->use_mit_saver_extension = False;
715 else if (p->use_xidle_extension)
718 "%s: MIT-SCREEN-SAVER extension used instead of XIDLE extension.\n",
720 p->use_xidle_extension = False;
722 #else /* !HAVE_MIT_SAVER_EXTENSION */
724 "%s: not compiled with support for the MIT-SCREEN-SAVER extension.\n",
726 p->use_mit_saver_extension = False;
727 #endif /* !HAVE_MIT_SAVER_EXTENSION */
730 if (p->use_xidle_extension)
732 #ifdef HAVE_XIDLE_EXTENSION
733 int first_event, first_error;
734 if (! XidleQueryExtension (si->dpy, &first_event, &first_error))
737 "%s: display %s does not support the XIdle extension.\n",
738 progname, DisplayString (si->dpy));
739 p->use_xidle_extension = False;
741 #else /* !HAVE_XIDLE_EXTENSION */
742 fprintf (stderr, "%s: not compiled with support for XIdle.\n",
744 p->use_xidle_extension = False;
745 #endif /* !HAVE_XIDLE_EXTENSION */
748 /* Call this only after having probed for presence of desired extension. */
749 initialize_screensaver_window (si);
753 disable_builtin_screensaver (si, True);
755 if (p->verbose_p && p->use_mit_saver_extension)
756 fprintf (stderr, "%s: using MIT-SCREEN-SAVER server extension.\n",
758 if (p->verbose_p && p->use_sgi_saver_extension)
759 fprintf (stderr, "%s: using SGI SCREEN_SAVER server extension.\n",
761 if (p->verbose_p && p->use_xidle_extension)
762 fprintf (stderr, "%s: using XIdle server extension.\n",
765 initialize_stderr (si);
766 XSetErrorHandler (saver_ehandler);
768 if (initial_demo_mode_p)
769 /* If the user wants demo mode, don't wait around before doing it. */
770 p->initial_delay = 0;
772 if (!p->use_xidle_extension &&
773 !p->use_mit_saver_extension &&
774 !p->use_sgi_saver_extension)
776 if (p->initial_delay)
780 printf ("%s: waiting for %d second%s...", progname,
781 (int) p->initial_delay,
782 (p->initial_delay == 1 ? "" : "s"));
785 sleep (p->initial_delay);
791 printf ("%s: selecting events on extant windows...", progname);
795 /* Select events on the root windows of every screen. This also selects
796 for window creation events, so that new subwindows will be noticed.
798 for (i = 0; i < si->nscreens; i++)
799 start_notice_events_timer (si,
800 RootWindowOfScreen (si->screens[i].screen));
808 main_loop (saver_info *si)
810 saver_preferences *p = &si->prefs;
813 if (! si->demo_mode_p)
814 sleep_until_idle (si, True);
823 printf ("%s: user is idle; waking up at %s.\n", progname,
826 spawn_screenhack (si, True);
828 si->cycle_id = XtAppAddTimeOut (si->app, p->cycle, cycle_timer,
832 if (p->lock_p && p->lock_timeout == 0)
834 if (p->lock_p && !si->locked_p)
835 /* locked_p might be true already because of ClientMessage */
836 si->lock_id = XtAppAddTimeOut (si->app, p->lock_timeout,
843 sleep_until_idle (si, False); /* until not idle */
849 if (si->locking_disabled_p) abort ();
850 si->dbox_up_p = True;
852 /* We used to ungrab the keyboard here, before calling unlock_p()
853 to pop up the dialog box. This left the keyboard ungrabbed
854 for a small window, during an insecure state. Bennett Todd
855 was seeing the bahavior that, when the load was high, he could
856 actually get characters through to a shell under the saver
857 window (he accidentally typed his password there...)
859 So the ungrab has been moved down into pop_passwd_dialog()
860 just after the server is grabbed, closing this window
863 /* ungrab_keyboard_and_mouse (); */
866 saver_screen_info *ssi = si->default_screen;
867 suspend_screenhack (si, True);
868 XUndefineCursor (si->dpy, ssi->screensaver_window);
870 printf ("%s: prompting for password.\n", progname);
872 if (p->verbose_p && val == False)
873 printf ("%s: password incorrect!\n", progname);
874 si->dbox_up_p = False;
875 XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor);
876 suspend_screenhack (si, False);
878 /* I think this grab is now redundant, but it shouldn't hurt.
880 if (!si->demo_mode_p)
881 grab_keyboard_and_mouse (si->dpy, ssi->screensaver_window,
887 si->locked_p = False;
891 kill_screenhack (si);
894 XtRemoveTimeOut (si->cycle_id);
900 XtRemoveTimeOut (si->lock_id);
905 printf ("%s: user is active; going to sleep at %s.\n", progname,
914 handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
916 saver_preferences *p = &si->prefs;
918 if (event->xclient.message_type != XA_SCREENSAVER)
921 str = XGetAtomName (si->dpy, event->xclient.message_type);
922 fprintf (stderr, "%s: unrecognised ClientMessage type %s received\n",
923 progname, (str ? str : "(null)"));
924 if (str) XFree (str);
927 if (event->xclient.format != 32)
929 fprintf (stderr, "%s: ClientMessage of format %d received, not 32\n",
930 progname, event->xclient.format);
934 type = event->xclient.data.l[0];
935 if (type == XA_ACTIVATE)
940 printf ("%s: ACTIVATE ClientMessage received.\n", progname);
941 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
943 XForceScreenSaver (si->dpy, ScreenSaverActive);
952 "%s: ClientMessage ACTIVATE received while already active.\n",
955 else if (type == XA_DEACTIVATE)
960 printf ("%s: DEACTIVATE ClientMessage received.\n", progname);
961 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
963 XForceScreenSaver (si->dpy, ScreenSaverReset);
972 "%s: ClientMessage DEACTIVATE received while inactive.\n",
975 else if (type == XA_CYCLE)
980 printf ("%s: CYCLE ClientMessage received.\n", progname);
982 XtRemoveTimeOut (si->cycle_id);
984 cycle_timer ((XtPointer) si, 0);
987 fprintf (stderr, "%s: ClientMessage CYCLE received while inactive.\n",
990 else if (type == XA_NEXT || type == XA_PREV)
993 printf ("%s: %s ClientMessage received.\n", progname,
994 (type == XA_NEXT ? "NEXT" : "PREV"));
995 si->next_mode_p = 1 + (type == XA_PREV);
1000 XtRemoveTimeOut (si->cycle_id);
1002 cycle_timer ((XtPointer) si, 0);
1007 else if (type == XA_EXIT)
1009 /* Ignore EXIT message if the screen is locked. */
1010 if (until_idle_p || !si->locked_p)
1013 printf ("%s: EXIT ClientMessage received.\n", progname);
1016 unblank_screen (si);
1017 kill_screenhack (si);
1018 XSync (si->dpy, False);
1023 fprintf (stderr, "%s: EXIT ClientMessage received while locked.\n",
1026 else if (type == XA_RESTART)
1028 /* The RESTART message works whether the screensaver is active or not,
1029 unless the screen is locked, in which case it doesn't work.
1031 if (until_idle_p || !si->locked_p)
1034 printf ("%s: RESTART ClientMessage received.\n", progname);
1037 unblank_screen (si);
1038 kill_screenhack (si);
1039 XSync (si->dpy, False);
1042 /* make sure error message shows up before exit. */
1043 if (real_stderr && stderr != real_stderr)
1044 dup2 (fileno(real_stderr), fileno(stderr));
1046 restart_process (si);
1047 exit (1); /* shouldn't get here; but if restarting didn't work,
1048 make this command be the same as EXIT. */
1051 fprintf(stderr, "%s: RESTART ClientMessage received while locked.\n",
1054 else if (type == XA_DEMO)
1057 fprintf (stderr, "%s: not compiled with support for DEMO mode\n",
1063 printf ("%s: DEMO ClientMessage received.\n", progname);
1064 si->demo_mode_p = True;
1068 "%s: DEMO ClientMessage received while active.\n", progname);
1071 else if (type == XA_LOCK)
1074 fprintf (stderr, "%s: not compiled with support for LOCK mode\n",
1077 if (si->locking_disabled_p)
1079 "%s: LOCK ClientMessage received, but locking is disabled.\n",
1081 else if (si->locked_p)
1083 "%s: LOCK ClientMessage received while already locked.\n",
1087 si->locked_p = True;
1089 printf ("%s: LOCK ClientMessage received;%s locking.\n",
1090 progname, until_idle_p ? " activating and" : "");
1092 if (si->lock_id) /* we're doing it now, so lose the timeout */
1094 XtRemoveTimeOut (si->lock_id);
1100 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
1102 XForceScreenSaver (si->dpy, ScreenSaverActive);
1116 str = (type ? XGetAtomName(si->dpy, type) : 0);
1119 "%s: unrecognised screensaver ClientMessage %s received\n",
1123 "%s: unrecognised screensaver ClientMessage 0x%x received\n",
1124 progname, (unsigned int) event->xclient.data.l[0]);
1125 if (str) XFree (str);