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 (*in && !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++)
352 for (s2 = s+j+1; s2[k]; s2++)
360 p->screenhacks[i] = reformat_hack(s); /* mallocs */
363 if (p->screenhacks_count)
365 /* Shrink down the screenhacks array to be only as big as it needs to.
366 This doesn't really matter at all. */
367 p->screenhacks = (char **)
368 realloc (p->screenhacks, ((p->screenhacks_count + 1) *
370 p->screenhacks [p->screenhacks_count] = 0;
374 free (p->screenhacks);
381 get_resources (saver_info *si)
384 saver_preferences *p = &si->prefs;
386 p->verbose_p = get_boolean_resource ("verbose", "Boolean");
387 p->lock_p = get_boolean_resource ("lock", "Boolean");
388 p->fade_p = get_boolean_resource ("fade", "Boolean");
389 p->unfade_p = get_boolean_resource ("unfade", "Boolean");
390 p->fade_seconds = get_seconds_resource ("fadeSeconds", "Time");
391 p->fade_ticks = get_integer_resource ("fadeTicks", "Integer");
392 p->install_cmap_p = get_boolean_resource ("installColormap", "Boolean");
393 p->nice_inferior = get_integer_resource ("nice", "Nice");
395 p->initial_delay = get_seconds_resource ("initialDelay", "Time");
396 p->timeout = 1000 * get_minutes_resource ("timeout", "Time");
397 p->lock_timeout = 1000 * get_minutes_resource ("lockTimeout", "Time");
398 p->cycle = 1000 * get_minutes_resource ("cycle", "Time");
401 p->passwd_timeout = 1000 * get_seconds_resource ("passwdTimeout", "Time");
404 p->pointer_timeout = 1000 * get_seconds_resource ("pointerPollTime", "Time");
405 p->notice_events_timeout = 1000*get_seconds_resource("windowCreationTimeout",
407 p->shell = get_string_resource ("bourneShell", "BourneShell");
410 /* don't set use_xidle_extension unless it is explicitly specified */
411 if ((s = get_string_resource ("xidleExtension", "Boolean")))
412 p->use_xidle_extension = get_boolean_resource ("xidleExtension","Boolean");
414 #ifdef HAVE_XIDLE_EXTENSION /* pick a default */
415 p->use_xidle_extension = True; /* if we have it, use it */
416 #else /* !HAVE_XIDLE_EXTENSION */
417 p->use_xidle_extension = False;
418 #endif /* !HAVE_XIDLE_EXTENSION */
421 /* don't set use_mit_extension unless it is explicitly specified */
422 if ((s = get_string_resource ("mitSaverExtension", "Boolean")))
423 p->use_mit_saver_extension = get_boolean_resource ("mitSaverExtension",
426 #ifdef HAVE_MIT_SAVER_EXTENSION /* pick a default */
427 p->use_mit_saver_extension = False; /* Default false, because it sucks */
428 #else /* !HAVE_MIT_SAVER_EXTENSION */
429 p->use_mit_saver_extension = False;
430 #endif /* !HAVE_MIT_SAVER_EXTENSION */
434 /* don't set use_mit_extension unless it is explicitly specified */
435 if ((s = get_string_resource ("sgiSaverExtension", "Boolean")))
436 p->use_sgi_saver_extension = get_boolean_resource ("sgiSaverExtension",
439 #ifdef HAVE_SGI_SAVER_EXTENSION /* pick a default */
440 p->use_sgi_saver_extension = True; /* if we have it, use it */
441 #else /* !HAVE_SGI_SAVER_EXTENSION */
442 p->use_sgi_saver_extension = False;
443 #endif /* !HAVE_SGI_SAVER_EXTENSION */
447 /* Throttle the various timeouts to reasonable values.
450 if (p->passwd_timeout == 0) p->passwd_timeout = 30000; /* 30 secs */
452 if (p->timeout < 10000) p->timeout = 10000; /* 10 secs */
453 if (p->cycle != 0 && p->cycle < 2000) p->cycle = 2000; /* 2 secs */
454 if (p->pointer_timeout == 0) p->pointer_timeout = 5000; /* 5 secs */
455 if (p->notice_events_timeout == 0)
456 p->notice_events_timeout = 10000; /* 10 secs */
457 if (p->fade_seconds == 0 || p->fade_ticks == 0)
459 if (! p->fade_p) p->unfade_p = False;
461 p->watchdog_timeout = p->cycle;
462 if (p->watchdog_timeout < 30000) p->watchdog_timeout = 30000; /* 30 secs */
463 if (p->watchdog_timeout > 3600000) p->watchdog_timeout = 3600000; /* 1 hr */
466 si->locking_disabled_p = True;
467 si->nolock_reason = "not compiled with locking support";
471 fprintf (stderr, "%s: not compiled with support for locking.\n",
474 #else /* ! NO_LOCKING */
475 if (p->lock_p && si->locking_disabled_p)
477 fprintf (stderr, "%s: locking is disabled (%s).\n", progname,
481 #endif /* ! NO_LOCKING */
483 get_screenhacks (si);
488 XSynchronize(si->dpy, True);
490 p->initial_delay = 0;
499 time_t now = time ((time_t *) 0);
500 char *str = (char *) ctime (&now);
501 char *nl = (char *) strchr (str, '\n');
502 if (nl) *nl = 0; /* take off that dang newline */
506 static void initialize (saver_info *si, int argc, char **argv);
507 static void main_loop (saver_info *si);
510 main (int argc, char **argv)
513 memset(&si, 0, sizeof(si));
514 global_si_kludge = &si; /* I hate C so much... */
515 initialize (&si, argc, argv);
516 main_loop (&si); /* doesn't return */
522 saver_ehandler (Display *dpy, XErrorEvent *error)
524 saver_info *si = global_si_kludge; /* I hate C so much... */
526 fprintf (real_stderr, "\nX error in %s:\n", progname);
527 if (XmuPrintDefaultErrorMessage (dpy, error, real_stderr))
530 fprintf (real_stderr, " (nonfatal.)\n");
535 initialize_connection (saver_info *si, int argc, char **argv)
538 Widget toplevel_shell = XtAppInitialize (&si->app, progclass,
539 options, XtNumber (options),
540 &argc, argv, defaults, 0, 0);
542 si->dpy = XtDisplay (toplevel_shell);
543 si->db = XtDatabase (si->dpy);
544 XtGetApplicationNameAndClass (si->dpy, &progname, &progclass);
546 db = si->db; /* resources.c needs this */
548 if (argc == 2 && !strcmp (argv[1], "-help"))
551 else if (argc == 2 && !strcmp (argv[1], "-debug"))
552 si->prefs.debug_p = True; /* no resource for this one, out of paranoia. */
556 fprintf (stderr, "%s: unknown option %s\n", progname, argv [1]);
562 #endif /* NO_SETUID */
563 XA_VROOT = XInternAtom (si->dpy, "__SWM_VROOT", False);
564 XA_SCREENSAVER = XInternAtom (si->dpy, "SCREENSAVER", False);
565 XA_SCREENSAVER_VERSION = XInternAtom (si->dpy, "_SCREENSAVER_VERSION",False);
566 XA_SCREENSAVER_ID = XInternAtom (si->dpy, "_SCREENSAVER_ID", False);
567 XA_SCREENSAVER_TIME = XInternAtom (si->dpy, "_SCREENSAVER_TIME", False);
568 XA_XSETROOT_ID = XInternAtom (si->dpy, "_XSETROOT_ID", False);
569 XA_ACTIVATE = XInternAtom (si->dpy, "ACTIVATE", False);
570 XA_DEACTIVATE = XInternAtom (si->dpy, "DEACTIVATE", False);
571 XA_RESTART = XInternAtom (si->dpy, "RESTART", False);
572 XA_CYCLE = XInternAtom (si->dpy, "CYCLE", False);
573 XA_NEXT = XInternAtom (si->dpy, "NEXT", False);
574 XA_PREV = XInternAtom (si->dpy, "PREV", False);
575 XA_EXIT = XInternAtom (si->dpy, "EXIT", False);
576 XA_DEMO = XInternAtom (si->dpy, "DEMO", False);
577 XA_LOCK = XInternAtom (si->dpy, "LOCK", False);
579 si->nscreens = ScreenCount(si->dpy);
580 si->screens = (saver_screen_info *)
581 calloc(sizeof(saver_screen_info), si->nscreens);
583 si->default_screen = &si->screens[DefaultScreen(si->dpy)];
585 for (i = 0; i < si->nscreens; i++)
587 saver_screen_info *ssi = &si->screens[i];
589 ssi->screen = ScreenOfDisplay (si->dpy, i);
591 /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
592 ssi->default_visual =
593 get_visual_resource (ssi->screen, "visualID", "VisualID", False);
595 ssi->current_visual = ssi->default_visual;
596 ssi->current_depth = visual_depth (ssi->screen, ssi->current_visual);
598 if (ssi == si->default_screen)
599 /* Since this is the default screen, use the one already created. */
600 ssi->toplevel_shell = toplevel_shell;
602 /* Otherwise, each screen must have its own unmapped root widget. */
603 ssi->toplevel_shell =
604 XtVaAppCreateShell(progname, progclass, applicationShellWidgetClass,
606 XtNscreen, ssi->screen,
607 XtNvisual, ssi->current_visual,
608 XtNdepth, visual_depth(ssi->screen,
609 ssi->current_visual),
616 initialize (saver_info *si, int argc, char **argv)
619 saver_preferences *p = &si->prefs;
620 Bool initial_demo_mode_p = False;
621 si->version = (char *) malloc (5);
622 memcpy (si->version, screensaver_id + 17, 4);
624 progname = argv[0]; /* reset later; this is for the benefit of lock_init() */
627 si->locking_disabled_p = True;
628 si->nolock_reason = "not compiled with locking support";
630 si->locking_disabled_p = False;
633 set_auth_parameters(argc, argv);
636 if (! lock_init (argc, argv)) /* before hack_uid() for proper permissions */
638 si->locking_disabled_p = True;
639 si->nolock_reason = "error getting password";
647 progclass = "XScreenSaver";
649 /* remove -demo switch before saving argv */
650 for (i = 1; i < argc; i++)
651 while (!strcmp ("-demo", argv [i]))
654 initial_demo_mode_p = True;
655 for (j = i; j < argc; j++)
656 argv [j] = argv [j+1];
659 if (argc <= i) break;
661 save_argv (argc, argv);
662 initialize_connection (si, argc, argv);
666 %s %s, copyright (c) 1991-1997 by Jamie Zawinski <jwz@netscape.com>\n\
667 pid = %d.\n", progname, si->version, (int) getpid ());
670 for (i = 0; i < si->nscreens; i++)
671 ensure_no_screensaver_running (si->dpy, si->screens[i].screen);
673 si->demo_mode_p = initial_demo_mode_p;
674 srandom ((int) time ((time_t *) 0));
676 if (p->use_sgi_saver_extension)
678 #ifdef HAVE_SGI_SAVER_EXTENSION
679 if (! query_sgi_saver_extension (si))
682 "%s: display %s does not support the SGI SCREEN_SAVER extension.\n",
683 progname, DisplayString (si->dpy));
684 p->use_sgi_saver_extension = False;
686 else if (p->use_mit_saver_extension)
688 fprintf (stderr, "%s: SGI SCREEN_SAVER extension used instead\
689 of MIT-SCREEN-SAVER extension.\n",
691 p->use_mit_saver_extension = False;
693 else if (p->use_xidle_extension)
696 "%s: SGI SCREEN_SAVER extension used instead of XIDLE extension.\n",
698 p->use_xidle_extension = False;
700 #else /* !HAVE_MIT_SAVER_EXTENSION */
702 "%s: not compiled with support for the SGI SCREEN_SAVER extension.\n",
704 p->use_sgi_saver_extension = False;
705 #endif /* !HAVE_SGI_SAVER_EXTENSION */
708 if (p->use_mit_saver_extension)
710 #ifdef HAVE_MIT_SAVER_EXTENSION
711 if (! query_mit_saver_extension (si))
714 "%s: display %s does not support the MIT-SCREEN-SAVER extension.\n",
715 progname, DisplayString (si->dpy));
716 p->use_mit_saver_extension = False;
718 else if (p->use_xidle_extension)
721 "%s: MIT-SCREEN-SAVER extension used instead of XIDLE extension.\n",
723 p->use_xidle_extension = False;
725 #else /* !HAVE_MIT_SAVER_EXTENSION */
727 "%s: not compiled with support for the MIT-SCREEN-SAVER extension.\n",
729 p->use_mit_saver_extension = False;
730 #endif /* !HAVE_MIT_SAVER_EXTENSION */
733 if (p->use_xidle_extension)
735 #ifdef HAVE_XIDLE_EXTENSION
736 int first_event, first_error;
737 if (! XidleQueryExtension (si->dpy, &first_event, &first_error))
740 "%s: display %s does not support the XIdle extension.\n",
741 progname, DisplayString (si->dpy));
742 p->use_xidle_extension = False;
744 #else /* !HAVE_XIDLE_EXTENSION */
745 fprintf (stderr, "%s: not compiled with support for XIdle.\n",
747 p->use_xidle_extension = False;
748 #endif /* !HAVE_XIDLE_EXTENSION */
751 /* Call this only after having probed for presence of desired extension. */
752 initialize_screensaver_window (si);
756 disable_builtin_screensaver (si, True);
758 if (p->verbose_p && p->use_mit_saver_extension)
759 fprintf (stderr, "%s: using MIT-SCREEN-SAVER server extension.\n",
761 if (p->verbose_p && p->use_sgi_saver_extension)
762 fprintf (stderr, "%s: using SGI SCREEN_SAVER server extension.\n",
764 if (p->verbose_p && p->use_xidle_extension)
765 fprintf (stderr, "%s: using XIdle server extension.\n",
768 initialize_stderr (si);
769 XSetErrorHandler (saver_ehandler);
771 if (initial_demo_mode_p)
772 /* If the user wants demo mode, don't wait around before doing it. */
773 p->initial_delay = 0;
775 if (!p->use_xidle_extension &&
776 !p->use_mit_saver_extension &&
777 !p->use_sgi_saver_extension)
779 if (p->initial_delay)
783 printf ("%s: waiting for %d second%s...", progname,
784 (int) p->initial_delay,
785 (p->initial_delay == 1 ? "" : "s"));
788 sleep (p->initial_delay);
794 printf ("%s: selecting events on extant windows...", progname);
798 /* Select events on the root windows of every screen. This also selects
799 for window creation events, so that new subwindows will be noticed.
801 for (i = 0; i < si->nscreens; i++)
802 start_notice_events_timer (si,
803 RootWindowOfScreen (si->screens[i].screen));
811 main_loop (saver_info *si)
813 saver_preferences *p = &si->prefs;
816 if (! si->demo_mode_p)
817 sleep_until_idle (si, True);
826 printf ("%s: user is idle; waking up at %s.\n", progname,
829 spawn_screenhack (si, True);
831 si->cycle_id = XtAppAddTimeOut (si->app, p->cycle, cycle_timer,
835 if (p->lock_p && p->lock_timeout == 0)
837 if (p->lock_p && !si->locked_p)
838 /* locked_p might be true already because of ClientMessage */
839 si->lock_id = XtAppAddTimeOut (si->app, p->lock_timeout,
846 sleep_until_idle (si, False); /* until not idle */
852 if (si->locking_disabled_p) abort ();
853 si->dbox_up_p = True;
855 /* We used to ungrab the keyboard here, before calling unlock_p()
856 to pop up the dialog box. This left the keyboard ungrabbed
857 for a small window, during an insecure state. Bennett Todd
858 was seeing the bahavior that, when the load was high, he could
859 actually get characters through to a shell under the saver
860 window (he accidentally typed his password there...)
862 So the ungrab has been moved down into pop_passwd_dialog()
863 just after the server is grabbed, closing this window
866 /* ungrab_keyboard_and_mouse (); */
869 saver_screen_info *ssi = si->default_screen;
870 suspend_screenhack (si, True);
871 XUndefineCursor (si->dpy, ssi->screensaver_window);
873 printf ("%s: prompting for password.\n", progname);
875 if (p->verbose_p && val == False)
876 printf ("%s: password incorrect!\n", progname);
877 si->dbox_up_p = False;
878 XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor);
879 suspend_screenhack (si, False);
881 /* I think this grab is now redundant, but it shouldn't hurt.
883 if (!si->demo_mode_p)
884 grab_keyboard_and_mouse (si->dpy, ssi->screensaver_window,
890 si->locked_p = False;
894 kill_screenhack (si);
897 XtRemoveTimeOut (si->cycle_id);
903 XtRemoveTimeOut (si->lock_id);
908 printf ("%s: user is active; going to sleep at %s.\n", progname,
917 handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
919 saver_preferences *p = &si->prefs;
921 if (event->xclient.message_type != XA_SCREENSAVER)
924 str = XGetAtomName (si->dpy, event->xclient.message_type);
925 fprintf (stderr, "%s: unrecognised ClientMessage type %s received\n",
926 progname, (str ? str : "(null)"));
927 if (str) XFree (str);
930 if (event->xclient.format != 32)
932 fprintf (stderr, "%s: ClientMessage of format %d received, not 32\n",
933 progname, event->xclient.format);
937 type = event->xclient.data.l[0];
938 if (type == XA_ACTIVATE)
943 printf ("%s: ACTIVATE ClientMessage received.\n", progname);
944 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
946 XForceScreenSaver (si->dpy, ScreenSaverActive);
955 "%s: ClientMessage ACTIVATE received while already active.\n",
958 else if (type == XA_DEACTIVATE)
963 printf ("%s: DEACTIVATE ClientMessage received.\n", progname);
964 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
966 XForceScreenSaver (si->dpy, ScreenSaverReset);
975 "%s: ClientMessage DEACTIVATE received while inactive.\n",
978 else if (type == XA_CYCLE)
983 printf ("%s: CYCLE ClientMessage received.\n", progname);
985 XtRemoveTimeOut (si->cycle_id);
987 cycle_timer ((XtPointer) si, 0);
990 fprintf (stderr, "%s: ClientMessage CYCLE received while inactive.\n",
993 else if (type == XA_NEXT || type == XA_PREV)
996 printf ("%s: %s ClientMessage received.\n", progname,
997 (type == XA_NEXT ? "NEXT" : "PREV"));
998 si->next_mode_p = 1 + (type == XA_PREV);
1003 XtRemoveTimeOut (si->cycle_id);
1005 cycle_timer ((XtPointer) si, 0);
1010 else if (type == XA_EXIT)
1012 /* Ignore EXIT message if the screen is locked. */
1013 if (until_idle_p || !si->locked_p)
1016 printf ("%s: EXIT ClientMessage received.\n", progname);
1019 unblank_screen (si);
1020 kill_screenhack (si);
1021 XSync (si->dpy, False);
1026 fprintf (stderr, "%s: EXIT ClientMessage received while locked.\n",
1029 else if (type == XA_RESTART)
1031 /* The RESTART message works whether the screensaver is active or not,
1032 unless the screen is locked, in which case it doesn't work.
1034 if (until_idle_p || !si->locked_p)
1037 printf ("%s: RESTART ClientMessage received.\n", progname);
1040 unblank_screen (si);
1041 kill_screenhack (si);
1042 XSync (si->dpy, False);
1045 /* make sure error message shows up before exit. */
1046 if (real_stderr && stderr != real_stderr)
1047 dup2 (fileno(real_stderr), fileno(stderr));
1049 restart_process (si);
1050 exit (1); /* shouldn't get here; but if restarting didn't work,
1051 make this command be the same as EXIT. */
1054 fprintf(stderr, "%s: RESTART ClientMessage received while locked.\n",
1057 else if (type == XA_DEMO)
1060 fprintf (stderr, "%s: not compiled with support for DEMO mode\n",
1066 printf ("%s: DEMO ClientMessage received.\n", progname);
1067 si->demo_mode_p = True;
1071 "%s: DEMO ClientMessage received while active.\n", progname);
1074 else if (type == XA_LOCK)
1077 fprintf (stderr, "%s: not compiled with support for LOCK mode\n",
1080 if (si->locking_disabled_p)
1082 "%s: LOCK ClientMessage received, but locking is disabled.\n",
1084 else if (si->locked_p)
1086 "%s: LOCK ClientMessage received while already locked.\n",
1090 si->locked_p = True;
1092 printf ("%s: LOCK ClientMessage received;%s locking.\n",
1093 progname, until_idle_p ? " activating and" : "");
1095 if (si->lock_id) /* we're doing it now, so lose the timeout */
1097 XtRemoveTimeOut (si->lock_id);
1103 if (p->use_mit_saver_extension || p->use_sgi_saver_extension)
1105 XForceScreenSaver (si->dpy, ScreenSaverActive);
1119 str = (type ? XGetAtomName(si->dpy, type) : 0);
1122 "%s: unrecognised screensaver ClientMessage %s received\n",
1126 "%s: unrecognised screensaver ClientMessage 0x%x received\n",
1127 progname, (unsigned int) event->xclient.data.l[0]);
1128 if (str) XFree (str);