1 /* xscreensaver, Copyright (c) 1991-2002 Jamie Zawinski <jwz@jwz.org>
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 such programs do not seem to
74 * occur in nature (I've never seen it happen in all these years.)
76 * The reason that we can't select KeyPresses on windows that don't have
77 * them already is that, when dispatching a KeyPress event, X finds the
78 * lowest (leafmost) window in the hierarchy on which *any* client selects
79 * for KeyPress, and sends the event to that window. This means that if a
80 * client had a window with subwindows, and expected to receive KeyPress
81 * events on the parent window instead of the subwindows, then that client
82 * would malfunction if some other client selected KeyPress events on the
83 * subwindows. It is an incredible misdesign that one client can make
84 * another client malfunction in this way.
86 * To detect mouse motion, we periodically wake up and poll the mouse
87 * position and button/modifier state, and notice when something has
88 * changed. We make this check every five seconds by default, and since the
89 * screensaver timeout has a granularity of one minute, this makes the
90 * chance of a false positive very small. We could detect mouse motion in
91 * the same way as keyboard activity, but that would suffer from the same
92 * "client changing event mask" problem that the KeyPress events hack does.
93 * I think polling is more reliable.
95 * None of this crap happens if we're using one of the extensions, so install
96 * one of them if the description above sounds just too flaky to live. It
97 * is, but those are your choices.
99 * A third idle-detection option could be implemented (but is not): when
100 * running on the console display ($DISPLAY is `localhost`:0) and we're on a
101 * machine where /dev/tty and /dev/mouse have reasonable last-modification
102 * times, we could just stat() those. But the incremental benefit of
103 * implementing this is really small, so forget I said anything.
106 * - Have a second terminal handy.
107 * - Be careful where you set your breakpoints, you don't want this to
108 * stop under the debugger with the keyboard grabbed or the blackout
110 * - If you run your debugger under XEmacs, try M-ESC (x-grab-keyboard)
111 * to keep your emacs window alive even when xscreensaver has grabbed.
112 * - Go read the code related to `debug_p'.
113 * - You probably can't set breakpoints in functions that are called on
114 * the other side of a call to fork() -- if your subprocesses are
115 * dying with signal 5, Trace/BPT Trap, you're losing in this way.
116 * - If you aren't using a server extension, don't leave this stopped
117 * under the debugger for very long, or the X input buffer will get
118 * huge because of the keypress events it's selecting for. This can
119 * make your X server wedge with "no more input buffers."
121 * ======================================================================== */
129 #include <X11/Xlib.h>
130 #include <X11/Xatom.h>
131 #include <X11/Intrinsic.h>
132 #include <X11/StringDefs.h>
133 #include <X11/Shell.h>
136 #include <sys/time.h>
137 #include <netdb.h> /* for gethostbyname() */
140 # include <X11/Xmu/Error.h>
142 # include <Xmu/Error.h>
144 #else /* !HAVE_XMU */
146 #endif /* !HAVE_XMU */
148 #ifdef HAVE_XIDLE_EXTENSION
149 # include <X11/extensions/xidle.h>
150 #endif /* HAVE_XIDLE_EXTENSION */
152 #include "xscreensaver.h"
154 #include "yarandom.h"
155 #include "resources.h"
159 saver_info *global_si_kludge = 0; /* I hate C so much... */
166 static Atom XA_SCREENSAVER_RESPONSE;
167 static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV;
168 static Atom XA_RESTART, XA_SELECT;
169 static Atom XA_THROTTLE, XA_UNTHROTTLE;
170 Atom XA_DEMO, XA_PREFS, XA_EXIT, XA_LOCK, XA_BLANK;
173 static XrmOptionDescRec options [] = {
175 { "-verbose", ".verbose", XrmoptionNoArg, "on" },
176 { "-silent", ".verbose", XrmoptionNoArg, "off" },
178 /* xscreensaver-demo uses this one */
179 { "-nosplash", ".splash", XrmoptionNoArg, "off" },
180 { "-no-splash", ".splash", XrmoptionNoArg, "off" },
182 /* useful for debugging */
183 { "-no-capture-stderr", ".captureStderr", XrmoptionNoArg, "off" },
185 /* There's really no reason to have these command-line args; they just
186 lead to confusion when the .xscreensaver file has conflicting values.
189 { "-splash", ".splash", XrmoptionNoArg, "on" },
190 { "-capture-stderr", ".captureStderr", XrmoptionNoArg, "on" },
191 { "-timeout", ".timeout", XrmoptionSepArg, 0 },
192 { "-cycle", ".cycle", XrmoptionSepArg, 0 },
193 { "-lock-mode", ".lock", XrmoptionNoArg, "on" },
194 { "-no-lock-mode", ".lock", XrmoptionNoArg, "off" },
195 { "-no-lock", ".lock", XrmoptionNoArg, "off" },
196 { "-lock-timeout", ".lockTimeout", XrmoptionSepArg, 0 },
197 { "-lock-vts", ".lockVTs", XrmoptionNoArg, "on" },
198 { "-no-lock-vts", ".lockVTs", XrmoptionNoArg, "off" },
199 { "-visual", ".visualID", XrmoptionSepArg, 0 },
200 { "-install", ".installColormap", XrmoptionNoArg, "on" },
201 { "-no-install", ".installColormap", XrmoptionNoArg, "off" },
202 { "-timestamp", ".timestamp", XrmoptionNoArg, "on" },
203 { "-xidle-extension", ".xidleExtension", XrmoptionNoArg, "on" },
204 { "-no-xidle-extension", ".xidleExtension", XrmoptionNoArg, "off" },
205 { "-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "on" },
206 { "-no-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "off" },
207 { "-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "on" },
208 { "-no-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "off" },
209 { "-proc-interrupts", ".procInterrupts", XrmoptionNoArg, "on" },
210 { "-no-proc-interrupts", ".procInterrupts", XrmoptionNoArg, "off" },
211 { "-idelay", ".initialDelay", XrmoptionSepArg, 0 },
212 { "-nice", ".nice", XrmoptionSepArg, 0 },
216 static char *defaults[] = {
217 #include "XScreenSaver_ad.h"
222 ERROR! You must not include vroot.h in this file.
226 do_help (saver_info *si)
231 xscreensaver %s, copyright (c) 1991-2002 by Jamie Zawinski <jwz@jwz.org>\n\
233 All xscreensaver configuration is via the `~/.xscreensaver' file.\n\
234 Rather than editing that file by hand, just run `xscreensaver-demo':\n\
235 that program lets you configure the screen saver graphically,\n\
236 including timeouts, locking, and display modes.\n\
238 Just getting started? Try this:\n\
243 For updates, online manual, and FAQ, please see the web page:\n\
245 http://www.jwz.org/xscreensaver/\n\
257 time_t now = time ((time_t *) 0);
258 char *str = (char *) ctime (&now);
259 char *nl = (char *) strchr (str, '\n');
260 if (nl) *nl = 0; /* take off that dang newline */
264 static Bool blurb_timestamp_p = False; /* kludge */
269 if (!blurb_timestamp_p)
273 static char buf[255];
274 char *ct = timestring();
275 int n = strlen(progname);
277 strncpy(buf, progname, n);
280 strncpy(buf+n, ct+11, 8);
281 strcpy(buf+n+9, ": ");
288 saver_ehandler (Display *dpy, XErrorEvent *error)
290 saver_info *si = global_si_kludge; /* I hate C so much... */
293 if (!real_stderr) real_stderr = stderr;
295 fprintf (real_stderr, "\n"
296 "#######################################"
297 "#######################################\n\n"
298 "%s: X Error! PLEASE REPORT THIS BUG.\n",
301 for (i = 0; i < si->nscreens; i++)
302 fprintf (real_stderr, "%s: screen %d: 0x%x, 0x%x, 0x%x\n",
304 RootWindowOfScreen (si->screens[i].screen),
305 si->screens[i].real_vroot,
306 si->screens[i].screensaver_window);
308 fprintf (real_stderr, "\n"
309 "#######################################"
310 "#######################################\n\n");
312 if (XmuPrintDefaultErrorMessage (dpy, error, real_stderr))
314 fprintf (real_stderr, "\n");
315 if (si->prefs.xsync_p)
317 saver_exit (si, -1, "because of synchronous X Error");
321 fprintf (real_stderr,
322 "#######################################"
323 "#######################################\n\n");
324 fprintf (real_stderr,
325 " If at all possible, please re-run xscreensaver with the command\n"
326 " line arguments `-sync -verbose -no-capture', and reproduce this\n"
327 " bug. That will cause xscreensaver to dump a `core' file to the\n"
328 " current directory. Please include the stack trace from that core\n"
329 " file in your bug report. *DO NOT* mail the core file itself!\n"
330 " That won't work.\n"
332 " http://www.jwz.org/xscreensaver/bugs.html explains how to create\n"
333 " the most useful bug reports, and how to examine core files.\n"
335 " The more information you can provide, the better. But please\n"
336 " report this bug, regardless!\n"
338 fprintf (real_stderr,
339 "#######################################"
340 "#######################################\n\n");
342 saver_exit (si, -1, 0);
346 fprintf (real_stderr, " (nonfatal.)\n");
351 /* This error handler is used only while the X connection is being set up;
352 after we've got a connection, we don't use this handler again. The only
353 reason for having this is so that we can present a more idiot-proof error
354 message than "cannot open display."
357 startup_ehandler (String name, String type, String class,
358 String defalt, /* one can't even spel properly
359 in this joke of a language */
360 String *av, Cardinal *ac)
364 saver_info *si = global_si_kludge; /* I hate C so much... */
365 XrmDatabase *db = XtAppGetErrorDatabase(si->app);
367 XtAppGetErrorDatabaseText(si->app, name, type, class, defalt,
368 fmt, sizeof(fmt)-1, *db);
370 fprintf (stderr, "%s: ", blurb());
372 memset (p, 0, sizeof(p));
373 if (*ac > countof (p)) *ac = countof (p);
374 memcpy ((char *) p, (char *) av, (*ac) * sizeof(*av));
375 fprintf (stderr, fmt, /* Did I mention that I hate C? */
376 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9]);
377 fprintf (stderr, "\n");
379 describe_uids (si, stderr);
381 if (si->orig_uid && !strncmp (si->orig_uid, "root/", 5))
383 fprintf (stderr, "\n"
384 "%s: This is probably because you're logging in as root. You\n"
385 " shouldn't log in as root: you should log in as a normal user,\n"
386 " and then `su' as needed. If you insist on logging in as\n"
387 " root, you will have to turn off X's security features before\n"
388 " xscreensaver will work.\n"
390 " Please read the manual and FAQ for more information:\n",
395 fprintf (stderr, "\n"
396 "%s: Errors at startup are usually authorization problems.\n"
397 " But you're not logging in as root (good!) so something\n"
398 " else must be wrong. Did you read the manual and the FAQ?\n",
402 fprintf (stderr, "\n"
403 " http://www.jwz.org/xscreensaver/faq.html\n"
404 " http://www.jwz.org/xscreensaver/man.html\n"
413 /* The zillions of initializations.
416 /* Set progname, version, etc. This is done very early.
419 set_version_string (saver_info *si, int *argc, char **argv)
421 progclass = "XScreenSaver";
423 /* progname is reset later, after we connect to X. */
424 progname = strrchr(argv[0], '/');
425 if (progname) progname++;
426 else progname = argv[0];
428 if (strlen(progname) > 100) /* keep it short. */
431 /* The X resource database blows up if argv[0] has a "." in it. */
434 while ((s = strchr (s, '.')))
438 si->version = (char *) malloc (5);
439 memcpy (si->version, screensaver_id + 17, 4);
444 /* Initializations that potentially take place as a priveleged user:
445 If the xscreensaver executable is setuid root, then these initializations
446 are run as root, before discarding privileges.
449 privileged_initialization (saver_info *si, int *argc, char **argv)
452 /* before hack_uid() for proper permissions */
453 lock_priv_init (*argc, argv, si->prefs.verbose_p);
454 #endif /* NO_LOCKING */
460 /* Figure out what locking mechanisms are supported.
463 lock_initialization (saver_info *si, int *argc, char **argv)
466 si->locking_disabled_p = True;
467 si->nolock_reason = "not compiled with locking support";
468 #else /* !NO_LOCKING */
470 /* Finish initializing locking, now that we're out of privileged code. */
471 if (! lock_init (*argc, argv, si->prefs.verbose_p))
473 si->locking_disabled_p = True;
474 si->nolock_reason = "error getting password";
477 /* If locking is currently enabled, but the environment indicates that
478 we have been launched as GDM's "Background" program, then disable
479 locking just in case.
481 if (!si->locking_disabled_p && getenv ("RUNNING_UNDER_GDM"))
483 si->locking_disabled_p = True;
484 si->nolock_reason = "running under GDM";
486 #endif /* NO_LOCKING */
492 /* Open the connection to the X server, and intern our Atoms.
495 connect_to_server (saver_info *si, int *argc, char **argv)
497 Widget toplevel_shell;
500 char *d = getenv ("DISPLAY");
503 char ndpy[] = "DISPLAY=:0.0";
504 /* if (si->prefs.verbose_p) */ /* sigh, too early to test this... */
506 "%s: warning: $DISPLAY is not set: defaulting to \"%s\".\n",
511 #endif /* HAVE_PUTENV */
513 XSetErrorHandler (saver_ehandler);
515 XtAppSetErrorMsgHandler (si->app, startup_ehandler);
516 toplevel_shell = XtAppInitialize (&si->app, progclass,
517 options, XtNumber (options),
518 argc, argv, defaults, 0, 0);
519 XtAppSetErrorMsgHandler (si->app, 0);
521 si->dpy = XtDisplay (toplevel_shell);
522 si->prefs.db = XtDatabase (si->dpy);
523 XtGetApplicationNameAndClass (si->dpy, &progname, &progclass);
525 if(strlen(progname) > 100) /* keep it short. */
528 db = si->prefs.db; /* resources.c needs this */
530 XA_VROOT = XInternAtom (si->dpy, "__SWM_VROOT", False);
531 XA_SCREENSAVER = XInternAtom (si->dpy, "SCREENSAVER", False);
532 XA_SCREENSAVER_VERSION = XInternAtom (si->dpy, "_SCREENSAVER_VERSION",False);
533 XA_SCREENSAVER_ID = XInternAtom (si->dpy, "_SCREENSAVER_ID", False);
534 XA_SCREENSAVER_STATUS = XInternAtom (si->dpy, "_SCREENSAVER_STATUS", False);
535 XA_SCREENSAVER_RESPONSE = XInternAtom (si->dpy, "_SCREENSAVER_RESPONSE",
537 XA_XSETROOT_ID = XInternAtom (si->dpy, "_XSETROOT_ID", False);
538 XA_ESETROOT_PMAP_ID = XInternAtom (si->dpy, "ESETROOT_PMAP_ID", False);
539 XA_XROOTPMAP_ID = XInternAtom (si->dpy, "_XROOTPMAP_ID", False);
540 XA_ACTIVATE = XInternAtom (si->dpy, "ACTIVATE", False);
541 XA_DEACTIVATE = XInternAtom (si->dpy, "DEACTIVATE", False);
542 XA_RESTART = XInternAtom (si->dpy, "RESTART", False);
543 XA_CYCLE = XInternAtom (si->dpy, "CYCLE", False);
544 XA_NEXT = XInternAtom (si->dpy, "NEXT", False);
545 XA_PREV = XInternAtom (si->dpy, "PREV", False);
546 XA_SELECT = XInternAtom (si->dpy, "SELECT", False);
547 XA_EXIT = XInternAtom (si->dpy, "EXIT", False);
548 XA_DEMO = XInternAtom (si->dpy, "DEMO", False);
549 XA_PREFS = XInternAtom (si->dpy, "PREFS", False);
550 XA_LOCK = XInternAtom (si->dpy, "LOCK", False);
551 XA_BLANK = XInternAtom (si->dpy, "BLANK", False);
552 XA_THROTTLE = XInternAtom (si->dpy, "THROTTLE", False);
553 XA_UNTHROTTLE = XInternAtom (si->dpy, "UNTHROTTLE", False);
555 return toplevel_shell;
559 /* Handle the command-line arguments that were not handled for us by Xt.
560 Issue an error message and exit if there are unknown options.
563 process_command_line (saver_info *si, int *argc, char **argv)
566 for (i = 1; i < *argc; i++)
568 if (!strcmp (argv[i], "-debug"))
569 /* no resource for this one, out of paranoia. */
570 si->prefs.debug_p = True;
572 else if (!strcmp (argv[i], "-h") ||
573 !strcmp (argv[i], "-help") ||
574 !strcmp (argv[i], "--help"))
579 const char *s = argv[i];
580 fprintf (stderr, "%s: unknown option \"%s\". Try \"-help\".\n",
583 if (s[0] == '-' && s[1] == '-') s++;
584 if (!strcmp (s, "-activate") ||
585 !strcmp (s, "-deactivate") ||
586 !strcmp (s, "-cycle") ||
587 !strcmp (s, "-next") ||
588 !strcmp (s, "-prev") ||
589 !strcmp (s, "-exit") ||
590 !strcmp (s, "-restart") ||
591 !strcmp (s, "-demo") ||
592 !strcmp (s, "-prefs") ||
593 !strcmp (s, "-preferences") ||
594 !strcmp (s, "-lock") ||
595 !strcmp (s, "-version") ||
596 !strcmp (s, "-time"))
599 if (!strcmp (s, "-demo") || !strcmp (s, "-prefs"))
600 fprintf (stderr, "\n\
601 Perhaps you meant to run the `xscreensaver-demo' program instead?\n");
603 fprintf (stderr, "\n\
604 However, `%s' is an option to the `xscreensaver-command' program.\n", s);
607 The `xscreensaver' program is a daemon that runs in the background.\n\
608 You control a running xscreensaver process by sending it messages\n\
609 with `xscreensaver-demo' or `xscreensaver-command'.\n\
610 . See the man pages for details, or check the web page:\n\
611 http://www.jwz.org/xscreensaver/\n\n");
613 /* Since version 1.21 renamed the "-lock" option to "-lock-mode",
614 suggest that explicitly. */
615 if (!strcmp (s, "-lock"))
617 Or perhaps you meant either the \"-lock-mode\" or the\n\
618 \"-lock-timeout <minutes>\" options to xscreensaver?\n\n");
627 /* Print out the xscreensaver banner to the tty if applicable;
628 Issue any other warnings that are called for at this point.
631 print_banner (saver_info *si)
633 saver_preferences *p = &si->prefs;
635 /* This resource gets set some time before the others, so that we know
636 whether to print the banner (and so that the banner gets printed before
637 any resource-database-related error messages.)
639 p->verbose_p = (p->debug_p || get_boolean_resource ("verbose", "Boolean"));
641 /* Ditto, for the locking_disabled_p message. */
642 p->lock_p = get_boolean_resource ("lock", "Boolean");
646 "%s %s, copyright (c) 1991-2002 "
647 "by Jamie Zawinski <jwz@jwz.org>.\n",
648 progname, si->version);
651 fprintf (stderr, "\n"
652 "%s: Warning: running in DEBUG MODE. Be afraid.\n"
654 "\tNote that in debug mode, the xscreensaver window will only\n"
655 "\tcover the left half of the screen. (The idea is that you\n"
656 "\tcan still see debugging output in a shell, if you position\n"
657 "\tit on the right side of the screen.)\n"
659 "\tDebug mode is NOT SECURE. Do not run with -debug in\n"
660 "\tuntrusted environments.\n"
666 if (!si->uid_message || !*si->uid_message)
667 describe_uids (si, stderr);
670 if (si->orig_uid && *si->orig_uid)
671 fprintf (stderr, "%s: initial effective uid/gid was %s.\n",
672 blurb(), si->orig_uid);
673 fprintf (stderr, "%s: %s\n", blurb(), si->uid_message);
676 fprintf (stderr, "%s: in process %lu.\n", blurb(),
677 (unsigned long) getpid());
680 /* If locking was not able to be initalized for some reason, explain why.
681 (This has to be done after we've read the lock_p resource.)
683 if (p->lock_p && si->locking_disabled_p)
686 fprintf (stderr, "%s: locking is disabled (%s).\n", blurb(),
688 if (strstr (si->nolock_reason, "passw"))
689 fprintf (stderr, "%s: does xscreensaver need to be setuid? "
690 "consult the manual.\n", blurb());
691 else if (strstr (si->nolock_reason, "running as "))
693 "%s: locking only works when xscreensaver is launched\n"
694 "\t by a normal, non-privileged user (e.g., not \"root\".)\n"
695 "\t See the manual for details.\n",
701 /* Examine all of the display's screens, and populate the `saver_screen_info'
702 structures. Make sure this is called after hack_environment() sets $PATH.
705 initialize_per_screen_info (saver_info *si, Widget toplevel_shell)
707 Bool found_any_writable_cells = False;
710 si->nscreens = ScreenCount(si->dpy);
711 si->screens = (saver_screen_info *)
712 calloc(sizeof(saver_screen_info), si->nscreens);
714 si->default_screen = &si->screens[DefaultScreen(si->dpy)];
716 for (i = 0; i < si->nscreens; i++)
718 saver_screen_info *ssi = &si->screens[i];
720 ssi->screen = ScreenOfDisplay (si->dpy, i);
723 /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
724 ssi->default_visual =
725 get_visual_resource (ssi->screen, "visualID", "VisualID", False);
727 ssi->current_visual = ssi->default_visual;
728 ssi->current_depth = visual_depth (ssi->screen, ssi->current_visual);
730 /* Execute a subprocess to find the GL visual. */
731 ssi->best_gl_visual = get_best_gl_visual (ssi);
733 if (ssi == si->default_screen)
734 /* Since this is the default screen, use the one already created. */
735 ssi->toplevel_shell = toplevel_shell;
737 /* Otherwise, each screen must have its own unmapped root widget. */
738 ssi->toplevel_shell =
739 XtVaAppCreateShell (progname, progclass, applicationShellWidgetClass,
741 XtNscreen, ssi->screen,
742 XtNvisual, ssi->current_visual,
743 XtNdepth, visual_depth (ssi->screen,
744 ssi->current_visual),
747 if (! found_any_writable_cells)
749 /* Check to see whether fading is ever possible -- if any of the
750 screens on the display has a PseudoColor visual, then fading can
751 work (on at least some screens.) If no screen has a PseudoColor
752 visual, then don't bother ever trying to fade, because it will
753 just cause a delay without causing any visible effect.
755 if (has_writable_cells (ssi->screen, ssi->current_visual) ||
756 get_visual (ssi->screen, "PseudoColor", True, False) ||
757 get_visual (ssi->screen, "GrayScale", True, False))
758 found_any_writable_cells = True;
762 si->fading_possible_p = found_any_writable_cells;
764 #ifdef HAVE_XF86VMODE_GAMMA
765 si->fading_possible_p = True; /* if we can gamma fade, go for it */
770 /* If any server extensions have been requested, try and initialize them.
771 Issue warnings if requests can't be honored.
774 initialize_server_extensions (saver_info *si)
776 saver_preferences *p = &si->prefs;
778 Bool server_has_xidle_extension_p = False;
779 Bool server_has_sgi_saver_extension_p = False;
780 Bool server_has_mit_saver_extension_p = False;
781 Bool system_has_proc_interrupts_p = False;
782 const char *piwhy = 0;
784 si->using_xidle_extension = p->use_xidle_extension;
785 si->using_sgi_saver_extension = p->use_sgi_saver_extension;
786 si->using_mit_saver_extension = p->use_mit_saver_extension;
787 si->using_proc_interrupts = p->use_proc_interrupts;
789 #ifdef HAVE_XIDLE_EXTENSION
790 server_has_xidle_extension_p = query_xidle_extension (si);
792 #ifdef HAVE_SGI_SAVER_EXTENSION
793 server_has_sgi_saver_extension_p = query_sgi_saver_extension (si);
795 #ifdef HAVE_MIT_SAVER_EXTENSION
796 server_has_mit_saver_extension_p = query_mit_saver_extension (si);
798 #ifdef HAVE_PROC_INTERRUPTS
799 system_has_proc_interrupts_p = query_proc_interrupts_available (si, &piwhy);
802 if (!server_has_xidle_extension_p)
803 si->using_xidle_extension = False;
804 else if (p->verbose_p)
806 if (si->using_xidle_extension)
807 fprintf (stderr, "%s: using XIDLE extension.\n", blurb());
809 fprintf (stderr, "%s: not using server's XIDLE extension.\n", blurb());
812 if (!server_has_sgi_saver_extension_p)
813 si->using_sgi_saver_extension = False;
814 else if (p->verbose_p)
816 if (si->using_sgi_saver_extension)
817 fprintf (stderr, "%s: using SGI SCREEN_SAVER extension.\n", blurb());
820 "%s: not using server's SGI SCREEN_SAVER extension.\n",
824 if (!server_has_mit_saver_extension_p)
825 si->using_mit_saver_extension = False;
826 else if (p->verbose_p)
828 if (si->using_mit_saver_extension)
829 fprintf (stderr, "%s: using lame MIT-SCREEN-SAVER extension.\n",
833 "%s: not using server's lame MIT-SCREEN-SAVER extension.\n",
837 if (!system_has_proc_interrupts_p)
839 si->using_proc_interrupts = False;
840 if (p->verbose_p && piwhy)
841 fprintf (stderr, "%s: not using /proc/interrupts: %s.\n", blurb(),
844 else if (p->verbose_p)
846 if (si->using_proc_interrupts)
848 "%s: consulting /proc/interrupts for keyboard activity.\n",
852 "%s: not consulting /proc/interrupts for keyboard activity.\n",
858 /* For the case where we aren't using an server extensions, select user events
859 on all the existing windows, and launch timers to select events on
860 newly-created windows as well.
862 If a server extension is being used, this does nothing.
865 select_events (saver_info *si)
867 saver_preferences *p = &si->prefs;
870 if (si->using_xidle_extension ||
871 si->using_mit_saver_extension ||
872 si->using_sgi_saver_extension)
875 if (p->initial_delay)
879 fprintf (stderr, "%s: waiting for %d second%s...", blurb(),
880 (int) p->initial_delay/1000,
881 (p->initial_delay == 1000 ? "" : "s"));
885 usleep (p->initial_delay);
887 fprintf (stderr, " done.\n");
892 fprintf (stderr, "%s: selecting events on extant windows...", blurb());
897 /* Select events on the root windows of every screen. This also selects
898 for window creation events, so that new subwindows will be noticed.
900 for (i = 0; i < si->nscreens; i++)
901 start_notice_events_timer (si, RootWindowOfScreen (si->screens[i].screen),
905 fprintf (stderr, " done.\n");
910 maybe_reload_init_file (saver_info *si)
912 saver_preferences *p = &si->prefs;
913 if (init_file_changed_p (p))
916 fprintf (stderr, "%s: file \"%s\" has changed, reloading.\n",
917 blurb(), init_file_name());
921 /* If a server extension is in use, and p->timeout has changed,
922 we need to inform the server of the new timeout. */
923 disable_builtin_screensaver (si, False);
925 /* If the DPMS settings in the init file have changed,
926 change the settings on the server to match. */
927 sync_server_dpms_settings (si->dpy,
928 (p->dpms_enabled_p &&
929 p->mode != DONT_BLANK),
930 p->dpms_standby / 1000,
931 p->dpms_suspend / 1000,
940 - wait until the user is idle;
942 - wait until the user is active;
943 - unblank the screen;
948 main_loop (saver_info *si)
950 saver_preferences *p = &si->prefs;
955 Bool was_locked = False;
956 sleep_until_idle (si, True);
961 fprintf (stderr, "%s: demoing %d at %s.\n", blurb(),
962 si->selection_mode, timestring());
964 fprintf (stderr, "%s: blanking screen at %s.\n", blurb(),
968 maybe_reload_init_file (si);
970 if (p->mode == DONT_BLANK)
973 fprintf (stderr, "%s: idle with blanking disabled at %s.\n",
974 blurb(), timestring());
976 /* Go around the loop and wait for the next bout of idleness,
977 or for the init file to change, or for a remote command to
978 come in, or something.
983 if (! blank_screen (si))
985 /* We were unable to grab either the keyboard or mouse.
986 This means we did not (and must not) blank the screen.
987 If we were to blank the screen while some other program
988 is holding both the mouse and keyboard grabbed, then
989 we would never be able to un-blank it! We would never
990 see any events, and the display would be wedged.
992 So, just go around the loop again and wait for the
993 next bout of idleness.
997 "%s: unable to grab keyboard or mouse! Blanking aborted.\n",
1002 kill_screenhack (si);
1004 if (!si->throttled_p)
1005 spawn_screenhack (si, True);
1006 else if (p->verbose_p)
1007 fprintf (stderr, "%s: not launching hack (throttled.)\n", blurb());
1009 /* Don't start the cycle timer in demo mode. */
1010 if (!si->demoing_p && p->cycle)
1011 si->cycle_id = XtAppAddTimeOut (si->app,
1013 /* see comment in cycle_timer() */
1021 /* Maybe start locking the screen.
1024 Time lock_timeout = p->lock_timeout;
1026 if (si->emergency_lock_p && p->lock_p && lock_timeout)
1028 int secs = p->lock_timeout / 1000;
1031 "%s: locking now, instead of waiting for %d:%02d:%02d.\n",
1033 (secs / (60 * 60)), ((secs / 60) % 60), (secs % 60));
1037 si->emergency_lock_p = False;
1039 if (!si->demoing_p && /* if not going into demo mode */
1040 p->lock_p && /* and locking is enabled */
1041 !si->locking_disabled_p && /* and locking is possible */
1042 lock_timeout == 0) /* and locking is not timer-deferred */
1043 set_locked_p (si, True); /* then lock right now. */
1045 /* locked_p might be true already because of the above, or because of
1046 the LOCK ClientMessage. But if not, and if we're supposed to lock
1047 after some time, set up a timer to do so.
1052 si->lock_id = XtAppAddTimeOut (si->app, lock_timeout,
1053 activate_lock_timer,
1056 #endif /* !NO_LOCKING */
1059 ok_to_unblank = True;
1062 sleep_until_idle (si, False); /* until not idle */
1063 maybe_reload_init_file (si);
1066 /* Maybe unlock the screen.
1070 saver_screen_info *ssi = si->default_screen;
1071 if (si->locking_disabled_p) abort ();
1074 si->dbox_up_p = True;
1075 suspend_screenhack (si, True);
1076 XUndefineCursor (si->dpy, ssi->screensaver_window);
1078 ok_to_unblank = unlock_p (si);
1080 si->dbox_up_p = False;
1081 XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor);
1082 suspend_screenhack (si, False); /* resume */
1084 if (!ok_to_unblank &&
1085 !screenhack_running_p (si))
1087 /* If the lock dialog has been dismissed and we're not about to
1088 unlock the screen, and there is currently no hack running,
1089 then launch one. (There might be no hack running if DPMS
1090 had kicked in. But DPMS is off now, so bring back the hack)
1093 XtRemoveTimeOut (si->cycle_id);
1095 cycle_timer ((XtPointer) si, 0);
1098 #endif /* !NO_LOCKING */
1100 } while (!ok_to_unblank);
1104 fprintf (stderr, "%s: unblanking screen at %s.\n",
1105 blurb(), timestring ());
1107 /* Kill before unblanking, to stop drawing as soon as possible. */
1108 kill_screenhack (si);
1109 unblank_screen (si);
1111 set_locked_p (si, False);
1112 si->emergency_lock_p = False;
1114 si->selection_mode = 0;
1116 /* If we're throttled, and the user has explicitly unlocked the screen,
1117 then unthrottle. If we weren't locked, then don't unthrottle
1118 automatically, because someone might have just bumped the desk... */
1121 if (si->throttled_p && p->verbose_p)
1122 fprintf (stderr, "%s: unthrottled.\n", blurb());
1123 si->throttled_p = False;
1128 XtRemoveTimeOut (si->cycle_id);
1134 XtRemoveTimeOut (si->lock_id);
1138 /* It's possible that a race condition could have led to the saver
1139 window being unexpectedly still mapped. This can happen like so:
1143 - that hack tries to grab a screen image( it does this by
1144 first unmapping the saver window, then remapping it.)
1145 - hack unmaps window
1147 - user becomes active
1148 - hack re-maps window (*)
1149 - driver kills subprocess
1150 - driver unmaps window (**)
1152 The race is that (*) might have been sent to the server before
1153 the client process was killed, but, due to scheduling randomness,
1154 might not have been received by the server until after (**).
1155 In other words, (*) and (**) might happen out of order, meaning
1156 the driver will unmap the window, and then after that, the
1157 recently-dead client will re-map it. This leaves the user
1158 locked out (it looks like a desktop, but it's not!)
1160 To avoid this: after un-blanking the screen, sleep for a second,
1161 and then really make sure the window is unmapped.
1165 XSync (si->dpy, False);
1167 for (i = 0; i < si->nscreens; i++)
1169 saver_screen_info *ssi = &si->screens[i];
1170 Window w = ssi->screensaver_window;
1171 XWindowAttributes xgwa;
1172 XGetWindowAttributes (si->dpy, w, &xgwa);
1173 if (xgwa.map_state != IsUnmapped)
1177 "%s: %d: client race! emergency unmap 0x%lx.\n",
1178 blurb(), i, (unsigned long) w);
1179 XUnmapWindow (si->dpy, w);
1182 XSync (si->dpy, False);
1186 fprintf (stderr, "%s: awaiting idleness.\n", blurb());
1190 static void analyze_display (saver_info *si);
1193 main (int argc, char **argv)
1197 saver_info *si = &the_si;
1198 saver_preferences *p = &si->prefs;
1201 memset(si, 0, sizeof(*si));
1202 global_si_kludge = si; /* I hate C so much... */
1204 # undef ya_rand_init
1207 save_argv (argc, argv);
1208 set_version_string (si, &argc, argv);
1209 privileged_initialization (si, &argc, argv);
1210 hack_environment (si);
1212 shell = connect_to_server (si, &argc, argv);
1213 process_command_line (si, &argc, argv);
1216 load_init_file (p); /* must be before initialize_per_screen_info() */
1217 blurb_timestamp_p = p->timestamp_p; /* kludge */
1218 initialize_per_screen_info (si, shell); /* also sets si->fading_possible_p */
1220 /* We can only issue this warnings now. */
1221 if (p->verbose_p && !si->fading_possible_p && (p->fade_p || p->unfade_p))
1223 "%s: there are no PseudoColor or GrayScale visuals.\n"
1224 "%s: ignoring the request for fading/unfading.\n",
1227 for (i = 0; i < si->nscreens; i++)
1228 if (ensure_no_screensaver_running (si->dpy, si->screens[i].screen))
1231 lock_initialization (si, &argc, argv);
1233 if (p->xsync_p) XSynchronize (si->dpy, True);
1235 if (p->verbose_p) analyze_display (si);
1236 initialize_server_extensions (si);
1238 si->blank_time = time ((time_t) 0); /* must be before ..._window */
1239 initialize_screensaver_window (si);
1244 disable_builtin_screensaver (si, True);
1245 sync_server_dpms_settings (si->dpy,
1246 (p->dpms_enabled_p &&
1247 p->mode != DONT_BLANK),
1248 p->dpms_standby / 1000,
1249 p->dpms_suspend / 1000,
1253 initialize_stderr (si);
1254 handle_signals (si);
1256 make_splash_dialog (si);
1258 main_loop (si); /* doesn't return */
1263 /* Processing ClientMessage events.
1267 static Bool error_handler_hit_p = False;
1270 ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
1272 error_handler_hit_p = True;
1276 /* Sometimes some systems send us ClientMessage events with bogus atoms in
1277 them. We only look up the atom names for printing warning messages,
1278 so don't bomb out when it happens...
1281 XGetAtomName_safe (Display *dpy, Atom atom)
1284 XErrorHandler old_handler;
1285 if (!atom) return 0;
1288 error_handler_hit_p = False;
1289 old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
1290 result = XGetAtomName (dpy, atom);
1292 XSetErrorHandler (old_handler);
1294 if (error_handler_hit_p) result = 0;
1301 sprintf (buf, "<<undefined atom 0x%04X>>", (unsigned long) atom);
1302 return strdup (buf);
1308 clientmessage_response (saver_info *si, Window w, Bool error,
1309 const char *stderr_msg,
1310 const char *protocol_msg)
1314 saver_preferences *p = &si->prefs;
1315 XErrorHandler old_handler;
1317 if (error || p->verbose_p)
1318 fprintf (stderr, "%s: %s\n", blurb(), stderr_msg);
1320 L = strlen(protocol_msg);
1321 proto = (char *) malloc (L + 2);
1322 proto[0] = (error ? '-' : '+');
1323 strcpy (proto+1, protocol_msg);
1326 /* Ignore all X errors while sending a response to a ClientMessage.
1327 Pretty much the only way we could get an error here is if the
1328 window we're trying to send the reply on has been deleted, in
1329 which case, the sender of the ClientMessage won't see our response
1332 XSync (si->dpy, False);
1333 error_handler_hit_p = False;
1334 old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
1336 XChangeProperty (si->dpy, w, XA_SCREENSAVER_RESPONSE, XA_STRING, 8,
1337 PropModeReplace, (unsigned char *) proto, L);
1339 XSync (si->dpy, False);
1340 XSetErrorHandler (old_handler);
1341 XSync (si->dpy, False);
1348 bogus_clientmessage_warning (saver_info *si, XEvent *event)
1350 char *str = XGetAtomName_safe (si->dpy, event->xclient.message_type);
1351 Window w = event->xclient.window;
1356 for (screen = 0; screen < si->nscreens; screen++)
1357 if (w == si->screens[screen].screensaver_window)
1359 strcpy (wdesc, "xscreensaver");
1362 else if (w == RootWindow (si->dpy, screen))
1364 strcpy (wdesc, "root");
1370 XErrorHandler old_handler;
1372 XWindowAttributes xgwa;
1373 memset (&hint, 0, sizeof(hint));
1374 memset (&xgwa, 0, sizeof(xgwa));
1376 XSync (si->dpy, False);
1377 old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
1378 XGetClassHint (si->dpy, w, &hint);
1379 XGetWindowAttributes (si->dpy, w, &xgwa);
1380 XSync (si->dpy, False);
1381 XSetErrorHandler (old_handler);
1382 XSync (si->dpy, False);
1384 screen = (xgwa.screen ? screen_number (xgwa.screen) : -1);
1386 sprintf (wdesc, "%.20s / %.20s",
1387 (hint.res_name ? hint.res_name : "(null)"),
1388 (hint.res_class ? hint.res_class : "(null)"));
1389 if (hint.res_name) XFree (hint.res_name);
1390 if (hint.res_class) XFree (hint.res_class);
1393 fprintf (stderr, "%s: %d: unrecognised ClientMessage \"%s\" received\n",
1394 blurb(), screen, (str ? str : "(null)"));
1395 fprintf (stderr, "%s: %d: for window 0x%lx (%s)\n",
1396 blurb(), screen, (unsigned long) w, wdesc);
1397 if (str) XFree (str);
1401 handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
1403 saver_preferences *p = &si->prefs;
1405 Window window = event->xclient.window;
1407 /* Preferences might affect our handling of client messages. */
1408 maybe_reload_init_file (si);
1410 if (event->xclient.message_type != XA_SCREENSAVER ||
1411 event->xclient.format != 32)
1413 bogus_clientmessage_warning (si, event);
1417 type = event->xclient.data.l[0];
1418 if (type == XA_ACTIVATE)
1422 clientmessage_response(si, window, False,
1423 "ACTIVATE ClientMessage received.",
1425 si->selection_mode = 0;
1426 si->demoing_p = False;
1428 if (si->throttled_p && p->verbose_p)
1429 fprintf (stderr, "%s: unthrottled.\n", blurb());
1430 si->throttled_p = False;
1432 if (si->using_mit_saver_extension || si->using_sgi_saver_extension)
1434 XForceScreenSaver (si->dpy, ScreenSaverActive);
1442 clientmessage_response(si, window, True,
1443 "ClientMessage ACTIVATE received while already active.",
1446 else if (type == XA_DEACTIVATE)
1450 if (si->throttled_p && p->verbose_p)
1451 fprintf (stderr, "%s: unthrottled.\n", blurb());
1452 si->throttled_p = False;
1454 clientmessage_response(si, window, False,
1455 "DEACTIVATE ClientMessage received.",
1457 if (si->using_mit_saver_extension || si->using_sgi_saver_extension)
1459 XForceScreenSaver (si->dpy, ScreenSaverReset);
1467 clientmessage_response(si, window, False,
1468 "ClientMessage DEACTIVATE received while inactive: resetting idle timer.",
1469 "not active: idle timer reset.");
1472 else if (type == XA_CYCLE)
1476 clientmessage_response(si, window, False,
1477 "CYCLE ClientMessage received.",
1479 si->selection_mode = 0; /* 0 means randomize when its time. */
1480 si->demoing_p = False;
1482 if (si->throttled_p && p->verbose_p)
1483 fprintf (stderr, "%s: unthrottled.\n", blurb());
1484 si->throttled_p = False;
1487 XtRemoveTimeOut (si->cycle_id);
1489 cycle_timer ((XtPointer) si, 0);
1492 clientmessage_response(si, window, True,
1493 "ClientMessage CYCLE received while inactive.",
1496 else if (type == XA_NEXT || type == XA_PREV)
1498 clientmessage_response(si, window, False,
1500 ? "NEXT ClientMessage received."
1501 : "PREV ClientMessage received."),
1503 si->selection_mode = (type == XA_NEXT ? -1 : -2);
1504 si->demoing_p = False;
1506 if (si->throttled_p && p->verbose_p)
1507 fprintf (stderr, "%s: unthrottled.\n", blurb());
1508 si->throttled_p = False;
1513 XtRemoveTimeOut (si->cycle_id);
1515 cycle_timer ((XtPointer) si, 0);
1520 else if (type == XA_SELECT)
1524 long which = event->xclient.data.l[1];
1526 sprintf (buf, "SELECT %ld ClientMessage received.", which);
1527 sprintf (buf2, "activating (%ld).", which);
1528 clientmessage_response (si, window, False, buf, buf2);
1530 if (which < 0) which = 0; /* 0 == "random" */
1531 si->selection_mode = which;
1532 si->demoing_p = False;
1534 if (si->throttled_p && p->verbose_p)
1535 fprintf (stderr, "%s: unthrottled.\n", blurb());
1536 si->throttled_p = False;
1541 XtRemoveTimeOut (si->cycle_id);
1543 cycle_timer ((XtPointer) si, 0);
1548 else if (type == XA_EXIT)
1550 /* Ignore EXIT message if the screen is locked. */
1551 if (until_idle_p || !si->locked_p)
1553 clientmessage_response (si, window, False,
1554 "EXIT ClientMessage received.",
1558 unblank_screen (si);
1559 kill_screenhack (si);
1560 XSync (si->dpy, False);
1562 saver_exit (si, 0, 0);
1565 clientmessage_response (si, window, True,
1566 "EXIT ClientMessage received while locked.",
1567 "screen is locked.");
1569 else if (type == XA_RESTART)
1571 /* The RESTART message works whether the screensaver is active or not,
1572 unless the screen is locked, in which case it doesn't work.
1574 if (until_idle_p || !si->locked_p)
1576 clientmessage_response (si, window, False,
1577 "RESTART ClientMessage received.",
1581 unblank_screen (si);
1582 kill_screenhack (si);
1583 XSync (si->dpy, False);
1586 restart_process (si); /* does not return */
1590 clientmessage_response (si, window, True,
1591 "RESTART ClientMessage received while locked.",
1592 "screen is locked.");
1594 else if (type == XA_DEMO)
1596 long arg = event->xclient.data.l[1];
1597 Bool demo_one_hack_p = (arg == 300);
1599 if (demo_one_hack_p)
1603 long which = event->xclient.data.l[2];
1606 sprintf (buf, "DEMO %ld ClientMessage received.", which);
1607 sprintf (buf2, "demoing (%ld).", which);
1608 clientmessage_response (si, window, False, buf, buf2);
1610 if (which < 0) which = 0; /* 0 == "random" */
1611 si->selection_mode = which;
1612 si->demoing_p = True;
1614 if (si->throttled_p && p->verbose_p)
1615 fprintf (stderr, "%s: unthrottled.\n", blurb());
1616 si->throttled_p = False;
1621 clientmessage_response (si, window, True,
1622 "DEMO ClientMessage received while active.",
1627 clientmessage_response (si, window, True,
1628 "obsolete form of DEMO ClientMessage.",
1629 "obsolete form of DEMO ClientMessage.");
1632 else if (type == XA_PREFS)
1634 clientmessage_response (si, window, True,
1635 "the PREFS client-message is obsolete.",
1636 "the PREFS client-message is obsolete.");
1638 else if (type == XA_LOCK)
1641 clientmessage_response (si, window, True,
1642 "not compiled with support for locking.",
1643 "locking not enabled.");
1644 #else /* !NO_LOCKING */
1645 if (si->locking_disabled_p)
1646 clientmessage_response (si, window, True,
1647 "LOCK ClientMessage received, but locking is disabled.",
1648 "locking not enabled.");
1649 else if (si->locked_p)
1650 clientmessage_response (si, window, True,
1651 "LOCK ClientMessage received while already locked.",
1656 char *response = (until_idle_p
1657 ? "activating and locking."
1659 sprintf (buf, "LOCK ClientMessage received; %s", response);
1660 clientmessage_response (si, window, False, buf, response);
1661 set_locked_p (si, True);
1662 si->selection_mode = 0;
1663 si->demoing_p = False;
1665 if (si->lock_id) /* we're doing it now, so lose the timeout */
1667 XtRemoveTimeOut (si->lock_id);
1673 if (si->using_mit_saver_extension ||
1674 si->using_sgi_saver_extension)
1676 XForceScreenSaver (si->dpy, ScreenSaverActive);
1685 #endif /* !NO_LOCKING */
1687 else if (type == XA_THROTTLE)
1689 if (si->throttled_p)
1690 clientmessage_response (si, window, True,
1691 "THROTTLE ClientMessage received, but "
1692 "already throttled.",
1693 "already throttled.");
1697 char *response = "throttled.";
1698 si->throttled_p = True;
1699 si->selection_mode = 0;
1700 si->demoing_p = False;
1701 sprintf (buf, "THROTTLE ClientMessage received; %s", response);
1702 clientmessage_response (si, window, False, buf, response);
1707 XtRemoveTimeOut (si->cycle_id);
1709 cycle_timer ((XtPointer) si, 0);
1713 else if (type == XA_UNTHROTTLE)
1715 if (! si->throttled_p)
1716 clientmessage_response (si, window, True,
1717 "UNTHROTTLE ClientMessage received, but "
1723 char *response = "unthrottled.";
1724 si->throttled_p = False;
1725 si->selection_mode = 0;
1726 si->demoing_p = False;
1727 sprintf (buf, "UNTHROTTLE ClientMessage received; %s", response);
1728 clientmessage_response (si, window, False, buf, response);
1733 XtRemoveTimeOut (si->cycle_id);
1735 cycle_timer ((XtPointer) si, 0);
1743 str = XGetAtomName_safe (si->dpy, type);
1747 if (strlen (str) > 80)
1748 strcpy (str+70, "...");
1749 sprintf (buf, "unrecognised screensaver ClientMessage %s received.",
1756 "unrecognised screensaver ClientMessage 0x%x received.",
1757 (unsigned int) event->xclient.data.l[0]);
1760 clientmessage_response (si, window, True, buf, buf);
1766 /* Some random diagnostics printed in -verbose mode.
1770 analyze_display (saver_info *si)
1774 const char *name; const char *desc; Bool useful_p;
1777 { "SCREEN_SAVER", /* underscore */ "SGI Screen-Saver",
1778 # ifdef HAVE_SGI_SAVER_EXTENSION
1783 }, { "SCREEN-SAVER", /* dash */ "SGI Screen-Saver",
1784 # ifdef HAVE_SGI_SAVER_EXTENSION
1789 }, { "MIT-SCREEN-SAVER", "MIT Screen-Saver",
1790 # ifdef HAVE_MIT_SAVER_EXTENSION
1795 }, { "XIDLE", "XIdle",
1796 # ifdef HAVE_XIDLE_EXTENSION
1801 }, { "SGI-VIDEO-CONTROL", "SGI Video-Control",
1802 # ifdef HAVE_SGI_VC_EXTENSION
1807 }, { "READDISPLAY", "SGI Read-Display",
1808 # ifdef HAVE_READ_DISPLAY_EXTENSION
1813 }, { "MIT-SHM", "Shared Memory",
1814 # ifdef HAVE_XSHM_EXTENSION
1819 }, { "DOUBLE-BUFFER", "Double-Buffering",
1820 # ifdef HAVE_DOUBLE_BUFFER_EXTENSION
1825 }, { "DPMS", "Power Management",
1826 # ifdef HAVE_DPMS_EXTENSION
1837 }, { "XFree86-VidModeExtension", "XF86 Video-Mode",
1838 # ifdef HAVE_XF86VMODE
1843 }, { "XINERAMA", "Xinerama",
1848 fprintf (stderr, "%s: running on display \"%s\" (%d screen%s).\n",
1850 DisplayString(si->dpy),
1851 si->nscreens, (si->nscreens == 1 ? "" : "s"));
1852 fprintf (stderr, "%s: vendor is %s, %d.\n", blurb(),
1853 ServerVendor(si->dpy), VendorRelease(si->dpy));
1855 fprintf (stderr, "%s: useful extensions:\n", blurb());
1856 for (i = 0; i < countof(exts); i++)
1858 int op = 0, event = 0, error = 0;
1861 if (!XQueryExtension (si->dpy, exts[i].name, &op, &event, &error))
1863 sprintf (buf, "%s: ", blurb());
1865 strcat (buf, exts[i].desc);
1866 if (!exts[i].useful_p)
1869 while (strlen (buf) < k) strcat (buf, " ");
1870 strcat (buf, "<-- not supported at compile time!");
1872 fprintf (stderr, "%s\n", buf);
1875 for (i = 0; i < si->nscreens; i++)
1877 unsigned long colormapped_depths = 0;
1878 unsigned long non_mapped_depths = 0;
1879 XVisualInfo vi_in, *vi_out;
1882 vi_out = XGetVisualInfo (si->dpy, VisualScreenMask, &vi_in, &out_count);
1883 if (!vi_out) continue;
1884 for (j = 0; j < out_count; j++)
1885 if (vi_out[j].class == PseudoColor)
1886 colormapped_depths |= (1 << vi_out[j].depth);
1888 non_mapped_depths |= (1 << vi_out[j].depth);
1889 XFree ((char *) vi_out);
1891 if (colormapped_depths)
1893 fprintf (stderr, "%s: screen %d colormapped depths:", blurb(), i);
1894 for (j = 0; j < 32; j++)
1895 if (colormapped_depths & (1 << j))
1896 fprintf (stderr, " %d", j);
1897 fprintf (stderr, ".\n");
1899 if (non_mapped_depths)
1901 fprintf (stderr, "%s: screen %d non-colormapped depths:",
1903 for (j = 0; j < 32; j++)
1904 if (non_mapped_depths & (1 << j))
1905 fprintf (stderr, " %d", j);
1906 fprintf (stderr, ".\n");
1912 display_is_on_console_p (saver_info *si)
1914 Bool not_on_console = True;
1915 char *dpystr = DisplayString (si->dpy);
1916 char *tail = (char *) strchr (dpystr, ':');
1917 if (! tail || strncmp (tail, ":0", 2))
1918 not_on_console = True;
1921 char dpyname[255], localname[255];
1922 strncpy (dpyname, dpystr, tail-dpystr);
1923 dpyname [tail-dpystr] = 0;
1925 !strcmp(dpyname, "unix") ||
1926 !strcmp(dpyname, "localhost"))
1927 not_on_console = False;
1928 else if (gethostname (localname, sizeof (localname)))
1929 not_on_console = True; /* can't find hostname? */
1932 /* We have to call gethostbyname() on the result of gethostname()
1933 because the two aren't guarenteed to be the same name for the
1934 same host: on some losing systems, one is a FQDN and the other
1935 is not. Here in the wide wonderful world of Unix it's rocket
1936 science to obtain the local hostname in a portable fashion.
1938 And don't forget, gethostbyname() reuses the structure it
1939 returns, so we have to copy the fucker before calling it again.
1940 Thank you master, may I have another.
1942 struct hostent *h = gethostbyname (dpyname);
1944 not_on_console = True;
1949 strcpy (hn, h->h_name);
1950 l = gethostbyname (localname);
1951 not_on_console = (!l || !!(strcmp (l->h_name, hn)));
1955 return !not_on_console;