X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=driver%2Fxscreensaver.c;h=92b28625c1a6337be6cdfbc178832116194e5861;hp=0d5796b82fbc0de5f94a07618e785ff4b23e0b9b;hb=6b1c86cf395f59389e4ece4ea8f4bea2c332745b;hpb=f3e0240915ed9f9b3a61781f5c7002d587563fe0 diff --git a/driver/xscreensaver.c b/driver/xscreensaver.c index 0d5796b8..92b28625 100644 --- a/driver/xscreensaver.c +++ b/driver/xscreensaver.c @@ -1,4 +1,4 @@ -/* xscreensaver, Copyright (c) 1991-1997 Jamie Zawinski +/* xscreensaver, Copyright (c) 1991-2008 Jamie Zawinski * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that @@ -16,11 +16,11 @@ * on (nearly) all windows; or by waiting for the MIT-SCREEN-SAVER extension * to send us a "you are idle" event. * - * Then, we map a full screen black window (or, in the case of the - * MIT-SCREEN-SAVER extension, use the one it gave us.) + * Then, we map a full screen black window. * * We place a __SWM_VROOT property on this window, so that newly-started - * clients will think that this window is a "virtual root" window. + * clients will think that this window is a "virtual root" window (as per + * the logic in the historical "vroot.h" header.) * * If there is an existing "virtual root" window (one that already had * an __SWM_VROOT property) then we remove that property from that window. @@ -38,10 +38,18 @@ * When they are, we kill the inferior process, unmap the window, and restore * the __SWM_VROOT property to the real virtual root window if there was one. * - * While we are waiting, we also set up timers so that, after a certain - * amount of time has passed, we can start a different screenhack. We do - * this by killing the running child process with SIGTERM, and then starting - * a new one in the same way. + * On multi-screen systems, we do the above on each screen, and start + * multiple programs, each with a different value of $DISPLAY. + * + * On Xinerama systems, we do a similar thing, but instead create multiple + * windows on the (only) display, and tell the subprocess which one to use + * via the $XSCREENSAVER_WINDOW environment variable -- this trick requires + * a recent (Aug 2003) revision of vroot.h. + * + * While we are waiting for user activity, we also set up timers so that, + * after a certain amount of time has passed, we can start a different + * screenhack. We do this by killing the running child process with + * SIGTERM, and then starting a new one in the same way. * * If there was a real virtual root, meaning that we removed the __SWM_VROOT * property from it, meaning we must (absolutely must) restore it before we @@ -57,9 +65,9 @@ * can really fuck up the world by killing this process with "kill -9". * * This program accepts ClientMessages of type SCREENSAVER; these messages - * may contain the atom ACTIVATE or DEACTIVATE, meaning to turn the + * may contain the atoms ACTIVATE, DEACTIVATE, etc, meaning to turn the * screensaver on or off now, regardless of the idleness of the user, - * and a few other things. The included "xscreensaver_command" program + * and a few other things. The included "xscreensaver-command" program * sends these messsages. * * If we don't have the XIdle, MIT-SCREEN-SAVER, or SGI SCREEN_SAVER @@ -70,8 +78,9 @@ * KeyPress on windows which don't select them, because that would * interfere with event propagation. This will break if any program * changes its event mask to contain KeyRelease or PointerMotion more than - * 30 seconds after creating the window, but that's probably pretty rare. - * + * 30 seconds after creating the window, but such programs do not seem to + * occur in nature (I've never seen it happen in all these years.) + * * The reason that we can't select KeyPresses on windows that don't have * them already is that, when dispatching a KeyPress event, X finds the * lowest (leafmost) window in the hierarchy on which *any* client selects @@ -91,9 +100,15 @@ * "client changing event mask" problem that the KeyPress events hack does. * I think polling is more reliable. * - * None of this crap happens if we're using one of the extensions, so install - * one of them if the description above sounds just too flaky to live. It - * is, but those are your choices. + * On systems with /proc/interrupts (Linux) we poll that file and note when + * the interrupt counter numbers on the "keyboard" and "PS/2" lines change. + * (There is no reliable way, using /proc/interrupts, to detect non-PS/2 + * mice, so it doesn't help for serial or USB mice.) + * + * None of this crap happens if we're using one of the extensions. Sadly, + * the XIdle extension hasn't been available for many years; the SGI + * extension only exists on SGIs; and the MIT extension, while widely + * deployed, is garbage in several ways. * * A third idle-detection option could be implemented (but is not): when * running on the console display ($DISPLAY is `localhost`:0) and we're on a @@ -108,15 +123,15 @@ * window exposed. * - If you run your debugger under XEmacs, try M-ESC (x-grab-keyboard) * to keep your emacs window alive even when xscreensaver has grabbed. - * - Go read the code related to -DDEBUG. + * - Go read the code related to `debug_p'. * - You probably can't set breakpoints in functions that are called on - * the other side of a call to fork() -- if your clients are dying - * with signal 5, Trace/BPT Trap, you're losing in this way. + * the other side of a call to fork() -- if your subprocesses are + * dying with signal 5, Trace/BPT Trap, you're losing in this way. * - If you aren't using a server extension, don't leave this stopped * under the debugger for very long, or the X input buffer will get * huge because of the keypress events it's selecting for. This can * make your X server wedge with "no more input buffers." - * + * * ======================================================================== */ #ifdef HAVE_CONFIG_H @@ -126,11 +141,19 @@ #include #include #include + +#include + #include #include #include #include #include +#include +#include +#include /* for gethostbyname() */ +#include +#include #ifdef HAVE_XMU # ifndef VMS # include @@ -142,14 +165,20 @@ #endif /* !HAVE_XMU */ #ifdef HAVE_XIDLE_EXTENSION -#include +# include #endif /* HAVE_XIDLE_EXTENSION */ +#ifdef HAVE_XINERAMA +# include +#endif /* HAVE_XINERAMA */ + #include "xscreensaver.h" #include "version.h" #include "yarandom.h" #include "resources.h" #include "visual.h" +#include "usleep.h" +#include "auth.h" saver_info *global_si_kludge = 0; /* I hate C so much... */ @@ -158,776 +187,1610 @@ char *progclass = 0; XrmDatabase db = 0; -static Atom XA_SCREENSAVER; +static Atom XA_SCREENSAVER_RESPONSE; static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV; -static Atom XA_EXIT, XA_RESTART, XA_DEMO, XA_LOCK; +static Atom XA_RESTART, XA_SELECT; +static Atom XA_THROTTLE, XA_UNTHROTTLE; +Atom XA_DEMO, XA_PREFS, XA_EXIT, XA_LOCK, XA_BLANK; static XrmOptionDescRec options [] = { - { "-timeout", ".timeout", XrmoptionSepArg, 0 }, - { "-cycle", ".cycle", XrmoptionSepArg, 0 }, - { "-idelay", ".initialDelay", XrmoptionSepArg, 0 }, - { "-nice", ".nice", XrmoptionSepArg, 0 }, - { "-visual", ".visualID", XrmoptionSepArg, 0 }, - { "-lock-timeout", ".lockTimeout", XrmoptionSepArg, 0 }, - { "-install", ".installColormap", XrmoptionNoArg, "on" }, - { "-no-install", ".installColormap", XrmoptionNoArg, "off" }, + { "-verbose", ".verbose", XrmoptionNoArg, "on" }, { "-silent", ".verbose", XrmoptionNoArg, "off" }, - { "-xidle-extension", ".xidleExtension", XrmoptionNoArg, "on" }, - { "-no-xidle-extension", ".xidleExtension", XrmoptionNoArg, "off" }, - { "-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "on" }, - { "-no-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "off" }, - { "-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "on" }, - { "-no-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "off" }, - { "-lock", ".lock", XrmoptionNoArg, "on" }, - { "-no-lock", ".lock", XrmoptionNoArg, "off" } + + /* xscreensaver-demo uses this one */ + { "-nosplash", ".splash", XrmoptionNoArg, "off" }, + { "-no-splash", ".splash", XrmoptionNoArg, "off" }, + + /* useful for debugging */ + { "-no-capture-stderr", ".captureStderr", XrmoptionNoArg, "off" }, }; +#ifdef __GNUC__ + __extension__ /* shut up about "string length is greater than the length + ISO C89 compilers are required to support" when including + the .ad file... */ +#endif + static char *defaults[] = { #include "XScreenSaver_ad.h" 0 }; +#ifdef _VROOT_H_ +ERROR! You must not include vroot.h in this file. +#endif + static void do_help (saver_info *si) { - printf ("\ -xscreensaver %s, copyright (c) 1991-1997 by Jamie Zawinski \n\ -The standard Xt command-line options are accepted; other options include:\n\ + fflush (stdout); + fflush (stderr); + fprintf (stdout, "\ +xscreensaver %s, copyright (c) 1991-2008 by Jamie Zawinski \n\ \n\ - -timeout When the screensaver should activate.\n\ - -cycle How long to let each hack run.\n\ - -idelay How long to sleep before startup.\n\ - -visual Which X visual to run on.\n\ - -demo Enter interactive demo mode on startup.\n\ - -install Install a private colormap.\n\ - -no-install Don't.\n\ - -verbose Be loud.\n\ - -silent Don't.\n\ - -xidle-extension Use the R5 XIdle server extension.\n\ - -no-xidle-extension Don't.\n\ - -mit-extension Use the R6 MIT_SCREEN_SAVER server extension.\n\ - -no-mit-extension Don't.\n\ - -sgi-extension Use the SGI SCREEN-SAVER server extension.\n\ - -no-sgi-extension Don't.\n\ - -lock Require a password before deactivating.\n\ - -no-lock Don't.\n\ - -lock-timeout Grace period before locking; default 0.\n\ - -help This message.\n\ + All xscreensaver configuration is via the `~/.xscreensaver' file.\n\ + Rather than editing that file by hand, just run `xscreensaver-demo':\n\ + that program lets you configure the screen saver graphically,\n\ + including timeouts, locking, and display modes.\n\ +\n", + si->version); + fprintf (stdout, "\ + Just getting started? Try this:\n\ \n\ -Use the `xscreensaver-command' program to control a running screensaver.\n\ + xscreensaver &\n\ + xscreensaver-demo\n\ \n\ -The *programs resource controls which graphics demos will be launched by the\n\ -screensaver. See the man page for more details. For updates, check\n\ -http://people.netscape.com/jwz/xscreensaver/\n\n", - si->version); - -#ifdef NO_LOCKING - printf ("Support for locking was not enabled at compile-time.\n"); -#endif -#ifdef NO_DEMO_MODE - printf ("Support for demo mode was not enabled at compile-time.\n"); -#endif -#if !defined(HAVE_XIDLE_EXTENSION) && !defined(HAVE_MIT_SAVER_EXTENSION) && !defined(HAVE_SGI_SAVER_EXTENSION) - printf ("Support for the XIDLE, SCREEN_SAVER, and MIT-SCREEN-SAVER server\ - extensions\nwas not enabled at compile-time.\n"); -#endif /* !HAVE_XIDLE_EXTENSION && !HAVE_MIT_SAVER_EXTENSION && !HAVE_SGI_SAVER_EXTENSION */ + For updates, online manual, and FAQ, please see the web page:\n\ +\n\ + http://www.jwz.org/xscreensaver/\n\ +\n"); fflush (stdout); + fflush (stderr); exit (1); } -static char * -reformat_hack(const char *hack) +char * +timestring (void) { - int i; - const char *in = hack; - int indent = 13; - char *h2 = (char *) malloc(strlen(in) + indent + 2); - char *out = h2; - - while (isspace(*in)) in++; /* skip whitespace */ - while (!isspace(*in) && *in != ':') - *out++ = *in++; /* snarf first token */ - while (isspace(*in)) in++; /* skip whitespace */ - - if (*in == ':') - *out++ = *in++; /* copy colon */ + time_t now = time ((time_t *) 0); + char *str = (char *) ctime (&now); + char *nl = (char *) strchr (str, '\n'); + if (nl) *nl = 0; /* take off that dang newline */ + return str; +} + +static Bool blurb_timestamp_p = False; /* kludge */ + +const char * +blurb (void) +{ + if (!blurb_timestamp_p) + return progname; else { - in = hack; - out = h2; /* reset to beginning */ + static char buf[255]; + char *ct = timestring(); + int n = strlen(progname); + if (n > 100) n = 99; + strncpy(buf, progname, n); + buf[n++] = ':'; + buf[n++] = ' '; + strncpy(buf+n, ct+11, 8); + strcpy(buf+n+9, ": "); + return buf; } +} - *out = 0; - - while (isspace(*in)) in++; /* skip whitespace */ - for (i = strlen(h2); i < indent; i++) /* indent */ - *out++ = ' '; - while (*in) *out++ = *in++; /* copy rest of line */ - *out = 0; +int +saver_ehandler (Display *dpy, XErrorEvent *error) +{ + saver_info *si = global_si_kludge; /* I hate C so much... */ + int i; + Bool fatal_p; - return h2; -} + if (!real_stderr) real_stderr = stderr; + fprintf (real_stderr, "\n" + "#######################################" + "#######################################\n\n" + "%s: X Error! PLEASE REPORT THIS BUG.\n", + blurb()); -static void -get_screenhacks (saver_info *si) -{ - saver_preferences *p = &si->prefs; - int i = 0; - int hacks_size = 60; - int size; - char *d; - - d = get_string_resource ("monoPrograms", "MonoPrograms"); - if (d && !*d) { free(d); d = 0; } - if (!d) - d = get_string_resource ("colorPrograms", "ColorPrograms"); - if (d && !*d) { free(d); d = 0; } - - if (d) + for (i = 0; i < si->nscreens; i++) { - fprintf (stderr, - "%s: the `monoPrograms' and `colorPrograms' resources are obsolete;\n\ - see the manual for details.\n", progname); - free(d); + saver_screen_info *ssi = &si->screens[i]; + fprintf (real_stderr, "%s: screen %d/%d: 0x%x, 0x%x, 0x%x\n", + blurb(), ssi->real_screen_number, ssi->number, + (unsigned int) RootWindowOfScreen (si->screens[i].screen), + (unsigned int) si->screens[i].real_vroot, + (unsigned int) si->screens[i].screensaver_window); } - d = get_string_resource ("programs", "Programs"); + fprintf (real_stderr, "\n" + "#######################################" + "#######################################\n\n"); + + fatal_p = XmuPrintDefaultErrorMessage (dpy, error, real_stderr); - size = strlen (d); - p->screenhacks = (char **) malloc (sizeof (char *) * hacks_size); - p->screenhacks_count = 0; + fatal_p = True; /* The only time I've ever seen a supposedly nonfatal error, + it has been BadImplementation / Xlib sequence lost, which + are in truth pretty damned fatal. + */ - while (i < size) + fprintf (real_stderr, "\n"); + + if (! fatal_p) + fprintf (real_stderr, "%s: nonfatal error.\n\n", blurb()); + else { - int end, start = i; - if (d[i] == ' ' || d[i] == '\t' || d[i] == '\n' || d[i] == 0) + if (si->prefs.xsync_p) { - i++; - continue; + saver_exit (si, -1, "because of synchronous X Error"); } - if (hacks_size <= p->screenhacks_count) - p->screenhacks = (char **) realloc (p->screenhacks, - (hacks_size = hacks_size * 2) * - sizeof (char *)); - p->screenhacks [p->screenhacks_count++] = d + i; - while (d[i] != 0 && d[i] != '\n') - i++; - end = i; - while (i > start && (d[i-1] == ' ' || d[i-1] == '\t')) - i--; - d[i] = 0; - i = end + 1; - } - - /* shrink all whitespace to one space, for the benefit of the "demo" - mode display. We only do this when we can easily tell that the - whitespace is not significant (no shell metachars). - */ - for (i = 0; i < p->screenhacks_count; i++) - { - char *s = p->screenhacks [i]; - char *s2; - int L = strlen (s); - int j, k; - for (j = 0; j < L; j++) + else { - switch (s[j]) - { - case '\'': case '"': case '`': case '\\': - goto DONE; - case '\t': - s[j] = ' '; - case ' ': - k = 0; - for (s2 = s+j+1; *s2 == ' ' || *s2 == '\t'; s2++) - k++; - if (k > 0) - for (s2 = s + j + 1; *s2; s2++) - s2 [0] = s2 [k]; - break; - } + fprintf (real_stderr, + "#######################################" + "#######################################\n\n"); + fprintf (real_stderr, + " If at all possible, please re-run xscreensaver with the command\n" + " line arguments `-sync -verbose -no-capture', and reproduce this\n" + " bug. That will cause xscreensaver to dump a `core' file to the\n" + " current directory. Please include the stack trace from that core\n" + " file in your bug report. *DO NOT* mail the core file itself!\n" + " That won't work.\n"); + fprintf (real_stderr, + "\n" + " http://www.jwz.org/xscreensaver/bugs.html explains how to create\n" + " the most useful bug reports, and how to examine core files.\n" + "\n" + " The more information you can provide, the better. But please\n" + " report this bug, regardless!\n" + "\n"); + fprintf (real_stderr, + "#######################################" + "#######################################\n\n"); + + saver_exit (si, -1, 0); } - DONE: - p->screenhacks[i] = reformat_hack(s); /* mallocs */ } - if (p->screenhacks_count) + return 0; +} + + +/* This error handler is used only while the X connection is being set up; + after we've got a connection, we don't use this handler again. The only + reason for having this is so that we can present a more idiot-proof error + message than "cannot open display." + */ +static void +startup_ehandler (String name, String type, String class, + String defalt, /* one can't even spel properly + in this joke of a language */ + String *av, Cardinal *ac) +{ + char fmt[512]; + String p[10]; + saver_info *si = global_si_kludge; /* I hate C so much... */ + XrmDatabase *db = XtAppGetErrorDatabase(si->app); + *fmt = 0; + XtAppGetErrorDatabaseText(si->app, name, type, class, defalt, + fmt, sizeof(fmt)-1, *db); + + fprintf (stderr, "%s: ", blurb()); + + memset (p, 0, sizeof(p)); + if (*ac > countof (p)) *ac = countof (p); + memcpy ((char *) p, (char *) av, (*ac) * sizeof(*av)); + fprintf (stderr, fmt, /* Did I mention that I hate C? */ + p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9]); + fprintf (stderr, "\n"); + + describe_uids (si, stderr); + + if (si->orig_uid && !strncmp (si->orig_uid, "root/", 5)) { - /* Shrink down the screenhacks array to be only as big as it needs to. - This doesn't really matter at all. */ - p->screenhacks = (char **) - realloc (p->screenhacks, ((p->screenhacks_count + 1) * - sizeof(char *))); - p->screenhacks [p->screenhacks_count] = 0; + fprintf (stderr, "\n" + "%s: This is probably because you're logging in as root. You\n" +" shouldn't log in as root: you should log in as a normal user,\n" +" and then `su' as needed. If you insist on logging in as\n" +" root, you will have to turn off X's security features before\n" +" xscreensaver will work.\n" + "\n" +" Please read the manual and FAQ for more information:\n", + blurb()); } else { - free (p->screenhacks); - p->screenhacks = 0; + fprintf (stderr, "\n" + "%s: Errors at startup are usually authorization problems.\n" +" But you're not logging in as root (good!) so something\n" +" else must be wrong. Did you read the manual and the FAQ?\n", + blurb()); } + + fprintf (stderr, "\n" + " http://www.jwz.org/xscreensaver/faq.html\n" + " http://www.jwz.org/xscreensaver/man.html\n" + "\n"); + + fflush (stderr); + fflush (stdout); + exit (1); } + +/* The zillions of initializations. + */ +/* Set progname, version, etc. This is done very early. + */ static void -get_resources (saver_info *si) +set_version_string (saver_info *si, int *argc, char **argv) { - char *s; - saver_preferences *p = &si->prefs; + progclass = "XScreenSaver"; - p->verbose_p = get_boolean_resource ("verbose", "Boolean"); - p->lock_p = get_boolean_resource ("lock", "Boolean"); - p->fade_p = get_boolean_resource ("fade", "Boolean"); - p->unfade_p = get_boolean_resource ("unfade", "Boolean"); - p->fade_seconds = get_seconds_resource ("fadeSeconds", "Time"); - p->fade_ticks = get_integer_resource ("fadeTicks", "Integer"); - p->install_cmap_p = get_boolean_resource ("installColormap", "Boolean"); - p->nice_inferior = get_integer_resource ("nice", "Nice"); + /* progname is reset later, after we connect to X. */ + progname = strrchr(argv[0], '/'); + if (progname) progname++; + else progname = argv[0]; - p->initial_delay = get_seconds_resource ("initialDelay", "Time"); - p->timeout = 1000 * get_minutes_resource ("timeout", "Time"); - p->lock_timeout = 1000 * get_minutes_resource ("lockTimeout", "Time"); - p->cycle = 1000 * get_minutes_resource ("cycle", "Time"); + if (strlen(progname) > 100) /* keep it short. */ + progname[99] = 0; -#ifndef NO_LOCKING - p->passwd_timeout = 1000 * get_seconds_resource ("passwdTimeout", "Time"); -#endif + /* The X resource database blows up if argv[0] has a "." in it. */ + { + char *s = argv[0]; + while ((s = strchr (s, '.'))) + *s = '_'; + } - p->pointer_timeout = 1000 * get_seconds_resource ("pointerPollTime", "Time"); - p->notice_events_timeout = 1000*get_seconds_resource("windowCreationTimeout", - "Time"); - p->shell = get_string_resource ("bourneShell", "BourneShell"); + si->version = (char *) malloc (5); + memcpy (si->version, screensaver_id + 17, 4); + si->version [4] = 0; +} - /* don't set use_xidle_extension unless it is explicitly specified */ - if ((s = get_string_resource ("xidleExtension", "Boolean"))) - p->use_xidle_extension = get_boolean_resource ("xidleExtension","Boolean"); - else -#ifdef HAVE_XIDLE_EXTENSION /* pick a default */ - p->use_xidle_extension = True; /* if we have it, use it */ -#else /* !HAVE_XIDLE_EXTENSION */ - p->use_xidle_extension = False; -#endif /* !HAVE_XIDLE_EXTENSION */ - if (s) free (s); - - /* don't set use_mit_extension unless it is explicitly specified */ - if ((s = get_string_resource ("mitSaverExtension", "Boolean"))) - p->use_mit_saver_extension = get_boolean_resource ("mitSaverExtension", - "Boolean"); - else -#ifdef HAVE_MIT_SAVER_EXTENSION /* pick a default */ - p->use_mit_saver_extension = False; /* Default false, because it sucks */ -#else /* !HAVE_MIT_SAVER_EXTENSION */ - p->use_mit_saver_extension = False; -#endif /* !HAVE_MIT_SAVER_EXTENSION */ - if (s) free (s); - - - /* don't set use_mit_extension unless it is explicitly specified */ - if ((s = get_string_resource ("sgiSaverExtension", "Boolean"))) - p->use_sgi_saver_extension = get_boolean_resource ("sgiSaverExtension", - "Boolean"); - else -#ifdef HAVE_SGI_SAVER_EXTENSION /* pick a default */ - p->use_sgi_saver_extension = True; /* if we have it, use it */ -#else /* !HAVE_SGI_SAVER_EXTENSION */ - p->use_sgi_saver_extension = False; -#endif /* !HAVE_SGI_SAVER_EXTENSION */ - if (s) free (s); +/* Initializations that potentially take place as a priveleged user: + If the xscreensaver executable is setuid root, then these initializations + are run as root, before discarding privileges. + */ +static void +privileged_initialization (saver_info *si, int *argc, char **argv) +{ +#ifndef NO_LOCKING + /* before hack_uid() for proper permissions */ + lock_priv_init (*argc, argv, si->prefs.verbose_p); +#endif /* NO_LOCKING */ + hack_uid (si); +} - /* Throttle the various timeouts to reasonable values. - */ -#ifndef NO_LOCKING - if (p->passwd_timeout == 0) p->passwd_timeout = 30000; /* 30 secs */ -#endif - if (p->timeout < 10000) p->timeout = 10000; /* 10 secs */ - if (p->cycle != 0 && p->cycle < 2000) p->cycle = 2000; /* 2 secs */ - if (p->pointer_timeout == 0) p->pointer_timeout = 5000; /* 5 secs */ - if (p->notice_events_timeout == 0) - p->notice_events_timeout = 10000; /* 10 secs */ - if (p->fade_seconds == 0 || p->fade_ticks == 0) - p->fade_p = False; - if (! p->fade_p) p->unfade_p = False; - - p->watchdog_timeout = p->cycle; - if (p->watchdog_timeout < 30000) p->watchdog_timeout = 30000; /* 30 secs */ - if (p->watchdog_timeout > 3600000) p->watchdog_timeout = 3600000; /* 1 hr */ +/* Figure out what locking mechanisms are supported. + */ +static void +lock_initialization (saver_info *si, int *argc, char **argv) +{ #ifdef NO_LOCKING si->locking_disabled_p = True; si->nolock_reason = "not compiled with locking support"; - if (p->lock_p) - { - p->lock_p = False; - fprintf (stderr, "%s: not compiled with support for locking.\n", - progname); - } -#else /* ! NO_LOCKING */ - if (p->lock_p && si->locking_disabled_p) +#else /* !NO_LOCKING */ + + /* Finish initializing locking, now that we're out of privileged code. */ + if (! lock_init (*argc, argv, si->prefs.verbose_p)) { - fprintf (stderr, "%s: locking is disabled (%s).\n", progname, - si->nolock_reason); - p->lock_p = False; + si->locking_disabled_p = True; + si->nolock_reason = "error getting password"; } -#endif /* ! NO_LOCKING */ - get_screenhacks (si); - -#ifdef DEBUG - if (p->debug_p) + /* If locking is currently enabled, but the environment indicates that + we have been launched as GDM's "Background" program, then disable + locking just in case. + */ + if (!si->locking_disabled_p && getenv ("RUNNING_UNDER_GDM")) { - XSynchronize(si->dpy, True); - p->verbose_p = True; - p->initial_delay = 0; + si->locking_disabled_p = True; + si->nolock_reason = "running under GDM"; } -#endif /* DEBUG */ -} + /* If the server is XDarwin (MacOS X) then disable locking. + (X grabs only affect X programs, so you can use Command-Tab + to bring any other Mac program to the front, e.g., Terminal.) + */ + if (!si->locking_disabled_p) + { + int op = 0, event = 0, error = 0; + Bool macos_p = False; + +#ifdef __APPLE__ + /* Disable locking if *running* on Apple hardware, since we have no + reliable way to determine whether the server is running on MacOS. + Hopefully __APPLE__ means "MacOS" and not "Linux on Mac hardware" + but I'm not really sure about that. + */ + macos_p = True; +#endif -char * -timestring (void) -{ - time_t now = time ((time_t *) 0); - char *str = (char *) ctime (&now); - char *nl = (char *) strchr (str, '\n'); - if (nl) *nl = 0; /* take off that dang newline */ - return str; -} + if (!macos_p) + /* This extension exists on the Apple X11 server, but not + on earlier versions of the XDarwin server. */ + macos_p = XQueryExtension (si->dpy, "Apple-DRI", &op, &event, &error); -static void initialize (saver_info *si, int argc, char **argv); -static void main_loop (saver_info *si); + if (macos_p) + { + si->locking_disabled_p = True; + si->nolock_reason = "Cannot lock securely on MacOS X"; + } + } -int -main (int argc, char **argv) -{ - saver_info si; - memset(&si, 0, sizeof(si)); - global_si_kludge = &si; /* I hate C so much... */ - initialize (&si, argc, argv); - main_loop (&si); /* doesn't return */ - return 0; +#endif /* NO_LOCKING */ } -int -saver_ehandler (Display *dpy, XErrorEvent *error) +/* Open the connection to the X server, and intern our Atoms. + */ +static Widget +connect_to_server (saver_info *si, int *argc, char **argv) { - saver_info *si = global_si_kludge; /* I hate C so much... */ + Widget toplevel_shell; - fprintf (real_stderr, "\nX error in %s:\n", progname); - if (XmuPrintDefaultErrorMessage (dpy, error, real_stderr)) - saver_exit (si, -1); - else - fprintf (real_stderr, " (nonfatal.)\n"); - return 0; -} +#ifdef HAVE_PUTENV + char *d = getenv ("DISPLAY"); + if (!d || !*d) + { + char *ndpy = strdup("DISPLAY=:0.0"); + /* if (si->prefs.verbose_p) */ /* sigh, too early to test this... */ + fprintf (stderr, + "%s: warning: $DISPLAY is not set: defaulting to \"%s\".\n", + blurb(), ndpy+8); + if (putenv (ndpy)) + abort (); + /* don't free (ndpy) -- some implementations of putenv (BSD 4.4, + glibc 2.0) copy the argument, but some (libc4,5, glibc 2.1.2) + do not. So we must leak it (and/or the previous setting). Yay. + */ + } +#endif /* HAVE_PUTENV */ -static void -initialize_connection (saver_info *si, int argc, char **argv) -{ - int i; - Widget toplevel_shell = XtAppInitialize (&si->app, progclass, - options, XtNumber (options), - &argc, argv, defaults, 0, 0); + XSetErrorHandler (saver_ehandler); + + XtAppSetErrorMsgHandler (si->app, startup_ehandler); + toplevel_shell = XtAppInitialize (&si->app, progclass, + options, XtNumber (options), + argc, argv, defaults, 0, 0); + XtAppSetErrorMsgHandler (si->app, 0); si->dpy = XtDisplay (toplevel_shell); - si->db = XtDatabase (si->dpy); + si->prefs.db = XtDatabase (si->dpy); XtGetApplicationNameAndClass (si->dpy, &progname, &progclass); - db = si->db; /* resources.c needs this */ + if(strlen(progname) > 100) /* keep it short. */ + progname [99] = 0; + + db = si->prefs.db; /* resources.c needs this */ - if (argc == 2 && !strcmp (argv[1], "-help")) - do_help (si); -#ifdef DEBUG - else if (argc == 2 && !strcmp (argv[1], "-debug")) - si->prefs.debug_p = True; /* no resource for this one, out of paranoia. */ -#endif /* DEBUG */ - else if (argc > 1) - { - fprintf (stderr, "%s: unknown option %s\n", progname, argv [1]); - exit (1); - } - get_resources (si); -#ifndef NO_SETUID - hack_uid_warn (si); -#endif /* NO_SETUID */ XA_VROOT = XInternAtom (si->dpy, "__SWM_VROOT", False); XA_SCREENSAVER = XInternAtom (si->dpy, "SCREENSAVER", False); XA_SCREENSAVER_VERSION = XInternAtom (si->dpy, "_SCREENSAVER_VERSION",False); XA_SCREENSAVER_ID = XInternAtom (si->dpy, "_SCREENSAVER_ID", False); - XA_SCREENSAVER_TIME = XInternAtom (si->dpy, "_SCREENSAVER_TIME", False); + XA_SCREENSAVER_STATUS = XInternAtom (si->dpy, "_SCREENSAVER_STATUS", False); + XA_SCREENSAVER_RESPONSE = XInternAtom (si->dpy, "_SCREENSAVER_RESPONSE", + False); XA_XSETROOT_ID = XInternAtom (si->dpy, "_XSETROOT_ID", False); + XA_ESETROOT_PMAP_ID = XInternAtom (si->dpy, "ESETROOT_PMAP_ID", False); + XA_XROOTPMAP_ID = XInternAtom (si->dpy, "_XROOTPMAP_ID", False); XA_ACTIVATE = XInternAtom (si->dpy, "ACTIVATE", False); XA_DEACTIVATE = XInternAtom (si->dpy, "DEACTIVATE", False); XA_RESTART = XInternAtom (si->dpy, "RESTART", False); XA_CYCLE = XInternAtom (si->dpy, "CYCLE", False); XA_NEXT = XInternAtom (si->dpy, "NEXT", False); XA_PREV = XInternAtom (si->dpy, "PREV", False); + XA_SELECT = XInternAtom (si->dpy, "SELECT", False); XA_EXIT = XInternAtom (si->dpy, "EXIT", False); XA_DEMO = XInternAtom (si->dpy, "DEMO", False); + XA_PREFS = XInternAtom (si->dpy, "PREFS", False); XA_LOCK = XInternAtom (si->dpy, "LOCK", False); + XA_BLANK = XInternAtom (si->dpy, "BLANK", False); + XA_THROTTLE = XInternAtom (si->dpy, "THROTTLE", False); + XA_UNTHROTTLE = XInternAtom (si->dpy, "UNTHROTTLE", False); - si->nscreens = ScreenCount(si->dpy); - si->screens = (saver_screen_info *) - calloc(sizeof(saver_screen_info), si->nscreens); + return toplevel_shell; +} - si->default_screen = &si->screens[DefaultScreen(si->dpy)]; - for (i = 0; i < si->nscreens; i++) +/* Handle the command-line arguments that were not handled for us by Xt. + Issue an error message and exit if there are unknown options. + */ +static void +process_command_line (saver_info *si, int *argc, char **argv) +{ + int i; + for (i = 1; i < *argc; i++) { - saver_screen_info *ssi = &si->screens[i]; - ssi->global = si; - ssi->screen = ScreenOfDisplay (si->dpy, i); - - /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */ - ssi->default_visual = - get_visual_resource (ssi->screen, "visualID", "VisualID", False); + if (!strcmp (argv[i], "-debug")) + /* no resource for this one, out of paranoia. */ + si->prefs.debug_p = True; - ssi->current_visual = ssi->default_visual; - ssi->current_depth = visual_depth (ssi->screen, ssi->current_visual); + else if (!strcmp (argv[i], "-h") || + !strcmp (argv[i], "-help") || + !strcmp (argv[i], "--help")) + do_help (si); - if (ssi == si->default_screen) - /* Since this is the default screen, use the one already created. */ - ssi->toplevel_shell = toplevel_shell; else - /* Otherwise, each screen must have its own unmapped root widget. */ - ssi->toplevel_shell = - XtVaAppCreateShell(progname, progclass, applicationShellWidgetClass, - si->dpy, - XtNscreen, ssi->screen, - XtNvisual, ssi->current_visual, - XtNdepth, visual_depth(ssi->screen, - ssi->current_visual), - 0); + { + const char *s = argv[i]; + fprintf (stderr, "%s: unknown option \"%s\". Try \"-help\".\n", + blurb(), s); + + if (s[0] == '-' && s[1] == '-') s++; + if (!strcmp (s, "-activate") || + !strcmp (s, "-deactivate") || + !strcmp (s, "-cycle") || + !strcmp (s, "-next") || + !strcmp (s, "-prev") || + !strcmp (s, "-exit") || + !strcmp (s, "-restart") || + !strcmp (s, "-demo") || + !strcmp (s, "-prefs") || + !strcmp (s, "-preferences") || + !strcmp (s, "-lock") || + !strcmp (s, "-version") || + !strcmp (s, "-time")) + { + + if (!strcmp (s, "-demo") || !strcmp (s, "-prefs")) + fprintf (stderr, "\n\ + Perhaps you meant to run the `xscreensaver-demo' program instead?\n"); + else + fprintf (stderr, "\n\ + However, `%s' is an option to the `xscreensaver-command' program.\n", s); + + fprintf (stderr, "\ + The `xscreensaver' program is a daemon that runs in the background.\n\ + You control a running xscreensaver process by sending it messages\n\ + with `xscreensaver-demo' or `xscreensaver-command'.\n\ +. See the man pages for details, or check the web page:\n\ + http://www.jwz.org/xscreensaver/\n\n"); + + /* Since version 1.21 renamed the "-lock" option to "-lock-mode", + suggest that explicitly. */ + if (!strcmp (s, "-lock")) + fprintf (stderr, "\ + Or perhaps you meant either the \"-lock-mode\" or the\n\ + \"-lock-timeout \" options to xscreensaver?\n\n"); + } + + exit (1); + } } } +/* Print out the xscreensaver banner to the tty if applicable; + Issue any other warnings that are called for at this point. + */ static void -initialize (saver_info *si, int argc, char **argv) +print_banner (saver_info *si) { - int i; saver_preferences *p = &si->prefs; - Bool initial_demo_mode_p = False; - si->version = (char *) malloc (5); - memcpy (si->version, screensaver_id + 17, 4); - si->version [4] = 0; - progname = argv[0]; /* reset later; this is for the benefit of lock_init() */ - -#ifdef NO_LOCKING - si->locking_disabled_p = True; - si->nolock_reason = "not compiled with locking support"; -#else - si->locking_disabled_p = False; - -#ifdef SCO - set_auth_parameters(argc, argv); -#endif - - if (! lock_init (argc, argv)) /* before hack_uid() for proper permissions */ - { - si->locking_disabled_p = True; - si->nolock_reason = "error getting password"; - } -#endif -#ifndef NO_SETUID - hack_uid (si); -#endif - - progclass = "XScreenSaver"; + /* This resource gets set some time before the others, so that we know + whether to print the banner (and so that the banner gets printed before + any resource-database-related error messages.) + */ + p->verbose_p = (p->debug_p || + get_boolean_resource (si->dpy, "verbose", "Boolean")); - /* remove -demo switch before saving argv */ - for (i = 1; i < argc; i++) - while (!strcmp ("-demo", argv [i])) - { - int j; - initial_demo_mode_p = True; - for (j = i; j < argc; j++) - argv [j] = argv [j+1]; - argv [j] = 0; - argc--; - if (argc <= i) break; - } - save_argv (argc, argv); - initialize_connection (si, argc, argv); + /* Ditto, for the locking_disabled_p message. */ + p->lock_p = get_boolean_resource (si->dpy, "lock", "Boolean"); if (p->verbose_p) - printf ("\ -%s %s, copyright (c) 1991-1997 by Jamie Zawinski \n\ - pid = %d.\n", progname, si->version, (int) getpid ()); + fprintf (stderr, + "%s %s, copyright (c) 1991-2008 " + "by Jamie Zawinski .\n", + progname, si->version); - - for (i = 0; i < si->nscreens; i++) - ensure_no_screensaver_running (si->dpy, si->screens[i].screen); - - si->demo_mode_p = initial_demo_mode_p; - srandom ((int) time ((time_t *) 0)); + if (p->debug_p) + fprintf (stderr, "\n" + "%s: Warning: running in DEBUG MODE. Be afraid.\n" + "\n" + "\tNote that in debug mode, the xscreensaver window will only\n" + "\tcover the left half of the screen. (The idea is that you\n" + "\tcan still see debugging output in a shell, if you position\n" + "\tit on the right side of the screen.)\n" + "\n" + "\tDebug mode is NOT SECURE. Do not run with -debug in\n" + "\tuntrusted environments.\n" + "\n", + blurb()); - if (p->use_sgi_saver_extension) + if (p->verbose_p) { -#ifdef HAVE_SGI_SAVER_EXTENSION - if (! query_sgi_saver_extension (si)) - { - fprintf (stderr, - "%s: display %s does not support the SGI SCREEN_SAVER extension.\n", - progname, DisplayString (si->dpy)); - p->use_sgi_saver_extension = False; - } - else if (p->use_mit_saver_extension) - { - fprintf (stderr, "%s: SGI SCREEN_SAVER extension used instead\ - of MIT-SCREEN-SAVER extension.\n", - progname); - p->use_mit_saver_extension = False; - } - else if (p->use_xidle_extension) + if (!si->uid_message || !*si->uid_message) + describe_uids (si, stderr); + else { - fprintf (stderr, - "%s: SGI SCREEN_SAVER extension used instead of XIDLE extension.\n", - progname); - p->use_xidle_extension = False; + if (si->orig_uid && *si->orig_uid) + fprintf (stderr, "%s: initial effective uid/gid was %s.\n", + blurb(), si->orig_uid); + fprintf (stderr, "%s: %s\n", blurb(), si->uid_message); } -#else /* !HAVE_MIT_SAVER_EXTENSION */ - fprintf (stderr, - "%s: not compiled with support for the SGI SCREEN_SAVER extension.\n", - progname); - p->use_sgi_saver_extension = False; -#endif /* !HAVE_SGI_SAVER_EXTENSION */ - } - if (p->use_mit_saver_extension) - { -#ifdef HAVE_MIT_SAVER_EXTENSION - if (! query_mit_saver_extension (si)) - { - fprintf (stderr, - "%s: display %s does not support the MIT-SCREEN-SAVER extension.\n", - progname, DisplayString (si->dpy)); - p->use_mit_saver_extension = False; - } - else if (p->use_xidle_extension) - { - fprintf (stderr, - "%s: MIT-SCREEN-SAVER extension used instead of XIDLE extension.\n", - progname); - p->use_xidle_extension = False; - } -#else /* !HAVE_MIT_SAVER_EXTENSION */ - fprintf (stderr, - "%s: not compiled with support for the MIT-SCREEN-SAVER extension.\n", - progname); - p->use_mit_saver_extension = False; -#endif /* !HAVE_MIT_SAVER_EXTENSION */ + fprintf (stderr, "%s: in process %lu.\n", blurb(), + (unsigned long) getpid()); } +} + +static void +print_lock_failure_banner (saver_info *si) +{ + saver_preferences *p = &si->prefs; - if (p->use_xidle_extension) + /* If locking was not able to be initalized for some reason, explain why. + (This has to be done after we've read the lock_p resource.) + */ + if (si->locking_disabled_p) { -#ifdef HAVE_XIDLE_EXTENSION - int first_event, first_error; - if (! XidleQueryExtension (si->dpy, &first_event, &first_error)) - { - fprintf (stderr, - "%s: display %s does not support the XIdle extension.\n", - progname, DisplayString (si->dpy)); - p->use_xidle_extension = False; - } -#else /* !HAVE_XIDLE_EXTENSION */ - fprintf (stderr, "%s: not compiled with support for XIdle.\n", - progname); - p->use_xidle_extension = False; -#endif /* !HAVE_XIDLE_EXTENSION */ + p->lock_p = False; + fprintf (stderr, "%s: locking is disabled (%s).\n", blurb(), + si->nolock_reason); + if (strstr (si->nolock_reason, "passw")) + fprintf (stderr, "%s: does xscreensaver need to be setuid? " + "consult the manual.\n", blurb()); + else if (strstr (si->nolock_reason, "running as ")) + fprintf (stderr, + "%s: locking only works when xscreensaver is launched\n" + "\t by a normal, non-privileged user (e.g., not \"root\".)\n" + "\t See the manual for details.\n", + blurb()); } - /* Call this only after having probed for presence of desired extension. */ - initialize_screensaver_window (si); +} - init_sigchld (); - disable_builtin_screensaver (si, True); +#ifdef HAVE_XINERAMA - if (p->verbose_p && p->use_mit_saver_extension) - fprintf (stderr, "%s: using MIT-SCREEN-SAVER server extension.\n", - progname); - if (p->verbose_p && p->use_sgi_saver_extension) - fprintf (stderr, "%s: using SGI SCREEN_SAVER server extension.\n", - progname); - if (p->verbose_p && p->use_xidle_extension) - fprintf (stderr, "%s: using XIdle server extension.\n", - progname); +static Bool +screens_overlap_p (XineramaScreenInfo *a, XineramaScreenInfo *b) +{ + /* Two rectangles overlap if the max of the tops is less than the + min of the bottoms and the max of the lefts is less than the min + of the rights. + */ +# undef MAX +# undef MIN +# define MAX(A,B) ((A)>(B)?(A):(B)) +# define MIN(A,B) ((A)<(B)?(A):(B)) + + int maxleft = MAX(a->x_org, b->x_org); + int maxtop = MAX(a->y_org, b->y_org); + int minright = MIN(a->x_org + a->width - 1, b->x_org + b->width); + int minbot = MIN(a->y_org + a->height - 1, b->y_org + b->height); + return (maxtop < minbot && maxleft < minright); +} - initialize_stderr (si); - XSetErrorHandler (saver_ehandler); - if (initial_demo_mode_p) - /* If the user wants demo mode, don't wait around before doing it. */ - p->initial_delay = 0; +/* Go through the list of Xinerama screen descriptions, and mark the + ones that appear to be insane, so that we don't use them. + */ +static void +check_xinerama_sanity (int count, Bool verbose_p, XineramaScreenInfo *xsi) +{ + static Bool printed_p = False; + int i, j; + char err[1024]; + *err = 0; + +# define X1 xsi[i].x_org +# define X2 xsi[j].x_org +# define Y1 xsi[i].y_org +# define Y2 xsi[j].y_org +# define W1 xsi[i].width +# define W2 xsi[j].width +# define H1 xsi[i].height +# define H2 xsi[j].height + +# define WHINE() do { \ + if (verbose_p) { \ + if (! printed_p) { \ + fprintf (stderr, "%s: compensating for Xinerama braindamage:\n", \ + blurb()); \ + printed_p = True; \ + } \ + fprintf (stderr, "%s: %d: %s\n", blurb(), xsi[i].screen_number,err); \ + } \ + xsi[i].screen_number = -1; \ + } while(0) + + /* If a screen is enclosed by any other screen, that's insane. + */ + for (i = 0; i < count; i++) + for (j = 0; j < count; j++) + if (i != j && + xsi[i].screen_number >= 0 && + xsi[j].screen_number >= 0 && + X1 >= X2 && Y1 >= Y2 && (X1+W1) <= (X2+W2) && (X1+H1) <= (X2+H2)) + { + sprintf (err, "%dx%d+%d+%d enclosed by %dx%d+%d+%d", + W1, H1, X1, Y1, + W2, H2, X2, Y2); + WHINE(); + continue; + } + + /* After checking for enclosure, check for other lossage against earlier + screens. We do enclosure first so that we make sure to pick the + larger one. + */ + for (i = 0; i < count; i++) + for (j = 0; j < i; j++) + { + if (xsi[i].screen_number < 0) continue; /* already marked */ - if (!p->use_xidle_extension && - !p->use_mit_saver_extension && - !p->use_sgi_saver_extension) - { - if (p->initial_delay) - { - if (p->verbose_p) - { - printf ("%s: waiting for %d second%s...", progname, - (int) p->initial_delay, - (p->initial_delay == 1 ? "" : "s")); - fflush (stdout); - } - sleep (p->initial_delay); - if (p->verbose_p) - printf (" done.\n"); - } - if (p->verbose_p) - { - printf ("%s: selecting events on extant windows...", progname); - fflush (stdout); - } + *err = 0; + if (X1 == X2 && Y1 == Y2 && W1 == W2 && H1 == H2) + sprintf (err, "%dx%d+%d+%d duplicated", W1, H1, X1, Y1); - /* Select events on the root windows of every screen. This also selects - for window creation events, so that new subwindows will be noticed. - */ - for (i = 0; i < si->nscreens; i++) - start_notice_events_timer (si, - RootWindowOfScreen (si->screens[i].screen)); + else if (screens_overlap_p (&xsi[i], &xsi[j])) + sprintf (err, "%dx%d+%d+%d overlaps %dx%d+%d+%d", + W1, H1, X1, Y1, + W2, H2, X2, Y2); - if (p->verbose_p) - printf (" done.\n"); - } + if (*err) WHINE(); + } + +# undef X1 +# undef X2 +# undef Y1 +# undef Y2 +# undef W1 +# undef W2 +# undef H1 +# undef H2 } +#endif /* HAVE_XINERAMA */ + + + +/* Examine all of the display's screens, and populate the `saver_screen_info' + structures. Make sure this is called after hack_environment() sets $PATH. + */ static void -main_loop (saver_info *si) +initialize_per_screen_info (saver_info *si, Widget toplevel_shell) +{ + Bool found_any_writable_cells = False; + int i; + +# ifdef HAVE_XINERAMA + { + int event, error; + si->xinerama_p = (XineramaQueryExtension (si->dpy, &event, &error) && + XineramaIsActive (si->dpy)); + } + + if (si->xinerama_p && ScreenCount (si->dpy) != 1) + { + si->xinerama_p = False; + if (si->prefs.verbose_p) + fprintf (stderr, + "%s: Xinerama AND %d screens? Disabling Xinerama support!\n", + blurb(), ScreenCount(si->dpy)); + } + + if (si->xinerama_p) + { + int nscreens = 0; + XineramaScreenInfo *xsi = XineramaQueryScreens (si->dpy, &nscreens); + if (!xsi) + si->xinerama_p = False; + else + { + int j = 0; + si->screens = (saver_screen_info *) + calloc(sizeof(saver_screen_info), nscreens); + check_xinerama_sanity (nscreens, si->prefs.verbose_p, xsi); + for (i = 0; i < nscreens; i++) + { + if (xsi[i].screen_number < 0) /* deemed insane */ + continue; + si->screens[j].x = xsi[i].x_org; + si->screens[j].y = xsi[i].y_org; + si->screens[j].width = xsi[i].width; + si->screens[j].height = xsi[i].height; + j++; + } + si->nscreens = j; + XFree (xsi); + } + si->default_screen = &si->screens[0]; + si->default_screen->real_screen_p = True; + } +# endif /* !HAVE_XINERAMA */ + + if (!si->xinerama_p) + { + si->nscreens = ScreenCount(si->dpy); + si->screens = (saver_screen_info *) + calloc(sizeof(saver_screen_info), si->nscreens); + si->default_screen = &si->screens[DefaultScreen(si->dpy)]; + + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + ssi->width = DisplayWidth (si->dpy, i); + ssi->height = DisplayHeight (si->dpy, i); + ssi->real_screen_p = True; + ssi->real_screen_number = i; + } + } + + +# ifdef QUAD_MODE + /* In "quad mode", we use the Xinerama code to pretend that there are 4 + screens for every physical screen, and run four times as many hacks... + */ + if (si->prefs.quad_p) + { + int ns2 = si->nscreens * 4; + saver_screen_info *ssi2 = (saver_screen_info *) + calloc(sizeof(saver_screen_info), ns2); + + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *old = &si->screens[i]; + + if (si->prefs.debug_p) old->width = old->width / 2; + + ssi2[i*4 ] = *old; + ssi2[i*4+1] = *old; + ssi2[i*4+2] = *old; + ssi2[i*4+3] = *old; + + ssi2[i*4 ].width /= 2; + ssi2[i*4 ].height /= 2; + + ssi2[i*4+1].x += ssi2[i*4 ].width; + ssi2[i*4+1].width -= ssi2[i*4 ].width; + ssi2[i*4+1].height /= 2; + + ssi2[i*4+2].y += ssi2[i*4 ].height; + ssi2[i*4+2].width /= 2; + ssi2[i*4+2].height -= ssi2[i*4 ].height; + + ssi2[i*4+3].x += ssi2[i*4+2].width; + ssi2[i*4+3].y += ssi2[i*4+2].height; + ssi2[i*4+3].width -= ssi2[i*4+2].width; + ssi2[i*4+3].height -= ssi2[i*4+2].height; + + ssi2[i*4+1].real_screen_p = False; + ssi2[i*4+2].real_screen_p = False; + ssi2[i*4+3].real_screen_p = False; + } + + si->nscreens = ns2; + free (si->screens); + si->screens = ssi2; + si->default_screen = &si->screens[DefaultScreen(si->dpy) * 4]; + si->xinerama_p = True; + } +# endif /* QUAD_MODE */ + + /* finish initializing the screens. + */ + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + ssi->global = si; + + ssi->number = i; + ssi->screen = ScreenOfDisplay (si->dpy, ssi->real_screen_number); + ssi->poll_mouse_last_root_x = -1; + ssi->poll_mouse_last_root_y = -1; + + if (!si->xinerama_p) + { + ssi->width = WidthOfScreen (ssi->screen); + ssi->height = HeightOfScreen (ssi->screen); + } + + /* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */ + ssi->default_visual = + get_visual_resource (ssi->screen, "visualID", "VisualID", False); + + ssi->current_visual = ssi->default_visual; + ssi->current_depth = visual_depth (ssi->screen, ssi->current_visual); + + /* Execute a subprocess to find the GL visual. */ + ssi->best_gl_visual = get_best_gl_visual (ssi); + + if (ssi == si->default_screen) + /* Since this is the default screen, use the one already created. */ + ssi->toplevel_shell = toplevel_shell; + else + /* Otherwise, each screen must have its own unmapped root widget. */ + ssi->toplevel_shell = + XtVaAppCreateShell (progname, progclass, applicationShellWidgetClass, + si->dpy, + XtNscreen, ssi->screen, + XtNvisual, ssi->current_visual, + XtNdepth, visual_depth (ssi->screen, + ssi->current_visual), + NULL); + + if (! found_any_writable_cells) + { + /* Check to see whether fading is ever possible -- if any of the + screens on the display has a PseudoColor visual, then fading can + work (on at least some screens.) If no screen has a PseudoColor + visual, then don't bother ever trying to fade, because it will + just cause a delay without causing any visible effect. + */ + if (has_writable_cells (ssi->screen, ssi->current_visual) || + get_visual (ssi->screen, "PseudoColor", True, False) || + get_visual (ssi->screen, "GrayScale", True, False)) + found_any_writable_cells = True; + } + } + + si->fading_possible_p = found_any_writable_cells; + +#ifdef HAVE_XF86VMODE_GAMMA + si->fading_possible_p = True; /* if we can gamma fade, go for it */ +#endif +} + + +/* If any server extensions have been requested, try and initialize them. + Issue warnings if requests can't be honored. + */ +static void +initialize_server_extensions (saver_info *si) { saver_preferences *p = &si->prefs; - while (1) + + Bool server_has_xidle_extension_p = False; + Bool server_has_sgi_saver_extension_p = False; + Bool server_has_mit_saver_extension_p = False; + Bool system_has_proc_interrupts_p = False; + const char *piwhy = 0; + + si->using_xidle_extension = p->use_xidle_extension; + si->using_sgi_saver_extension = p->use_sgi_saver_extension; + si->using_mit_saver_extension = p->use_mit_saver_extension; + si->using_proc_interrupts = p->use_proc_interrupts; + +#ifdef HAVE_XIDLE_EXTENSION + server_has_xidle_extension_p = query_xidle_extension (si); +#endif +#ifdef HAVE_SGI_SAVER_EXTENSION + server_has_sgi_saver_extension_p = query_sgi_saver_extension (si); +#endif +#ifdef HAVE_MIT_SAVER_EXTENSION + server_has_mit_saver_extension_p = query_mit_saver_extension (si); +#endif +#ifdef HAVE_PROC_INTERRUPTS + system_has_proc_interrupts_p = query_proc_interrupts_available (si, &piwhy); +#endif + + if (!server_has_xidle_extension_p) + si->using_xidle_extension = False; + else if (p->verbose_p) + { + if (si->using_xidle_extension) + fprintf (stderr, "%s: using XIDLE extension.\n", blurb()); + else + fprintf (stderr, "%s: not using server's XIDLE extension.\n", blurb()); + } + + if (!server_has_sgi_saver_extension_p) + si->using_sgi_saver_extension = False; + else if (p->verbose_p) { - if (! si->demo_mode_p) - sleep_until_idle (si, True); + if (si->using_sgi_saver_extension) + fprintf (stderr, "%s: using SGI SCREEN_SAVER extension.\n", blurb()); + else + fprintf (stderr, + "%s: not using server's SGI SCREEN_SAVER extension.\n", + blurb()); + } -#ifndef NO_DEMO_MODE - if (si->demo_mode_p) - demo_mode (si); + if (!server_has_mit_saver_extension_p) + si->using_mit_saver_extension = False; + else if (p->verbose_p) + { + if (si->using_mit_saver_extension) + fprintf (stderr, "%s: using lame MIT-SCREEN-SAVER extension.\n", + blurb()); else + fprintf (stderr, + "%s: not using server's lame MIT-SCREEN-SAVER extension.\n", + blurb()); + } + + /* These are incompatible (or at least, our support for them is...) */ + if (si->xinerama_p && si->using_mit_saver_extension) + { + si->using_mit_saver_extension = False; + if (p->verbose_p) + fprintf (stderr, "%s: Xinerama in use: disabling MIT-SCREEN-SAVER.\n", + blurb()); + } + +#ifdef HAVE_RANDR + query_randr_extension (si); #endif + + if (!system_has_proc_interrupts_p) + { + si->using_proc_interrupts = False; + if (p->verbose_p && piwhy) + fprintf (stderr, "%s: not using /proc/interrupts: %s.\n", blurb(), + piwhy); + } + else if (p->verbose_p) + { + if (si->using_proc_interrupts) + fprintf (stderr, + "%s: consulting /proc/interrupts for keyboard activity.\n", + blurb()); + else + fprintf (stderr, + "%s: not consulting /proc/interrupts for keyboard activity.\n", + blurb()); + } +} + + +/* For the case where we aren't using an server extensions, select user events + on all the existing windows, and launch timers to select events on + newly-created windows as well. + + If a server extension is being used, this does nothing. + */ +static void +select_events (saver_info *si) +{ + saver_preferences *p = &si->prefs; + int i; + + if (si->using_xidle_extension || + si->using_mit_saver_extension || + si->using_sgi_saver_extension) + return; + + if (p->initial_delay) + { + if (p->verbose_p) { - if (p->verbose_p) - printf ("%s: user is idle; waking up at %s.\n", progname, - timestring()); - blank_screen (si); - spawn_screenhack (si, True); - if (p->cycle) - si->cycle_id = XtAppAddTimeOut (si->app, p->cycle, cycle_timer, - (XtPointer) si); + fprintf (stderr, "%s: waiting for %d second%s...", blurb(), + (int) p->initial_delay/1000, + (p->initial_delay == 1000 ? "" : "s")); + fflush (stderr); + fflush (stdout); + } + usleep (p->initial_delay); + if (p->verbose_p) + fprintf (stderr, " done.\n"); + } -#ifndef NO_LOCKING - if (p->lock_p && p->lock_timeout == 0) - si->locked_p = True; - if (p->lock_p && !si->locked_p) - /* locked_p might be true already because of ClientMessage */ - si->lock_id = XtAppAddTimeOut (si->app, p->lock_timeout, - activate_lock_timer, - (XtPointer) si); -#endif + if (p->verbose_p) + { + fprintf (stderr, "%s: selecting events on extant windows...", blurb()); + fflush (stderr); + fflush (stdout); + } + + /* Select events on the root windows of every screen. This also selects + for window creation events, so that new subwindows will be noticed. + */ + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + if (ssi->real_screen_p) + start_notice_events_timer (si, + RootWindowOfScreen (si->screens[i].screen), False); + } + + if (p->verbose_p) + fprintf (stderr, " done.\n"); +} + + +void +maybe_reload_init_file (saver_info *si) +{ + saver_preferences *p = &si->prefs; + if (init_file_changed_p (p)) + { + if (p->verbose_p) + fprintf (stderr, "%s: file \"%s\" has changed, reloading.\n", + blurb(), init_file_name()); + + load_init_file (si->dpy, p); + + /* If a server extension is in use, and p->timeout has changed, + we need to inform the server of the new timeout. */ + disable_builtin_screensaver (si, False); + + /* If the DPMS settings in the init file have changed, + change the settings on the server to match. */ + sync_server_dpms_settings (si->dpy, + (p->dpms_enabled_p && + p->mode != DONT_BLANK), + p->dpms_standby / 1000, + p->dpms_suspend / 1000, + p->dpms_off / 1000, + False); + } +} - PASSWD_INVALID: - sleep_until_idle (si, False); /* until not idle */ +/* Loop forever: + + - wait until the user is idle; + - blank the screen; + - wait until the user is active; + - unblank the screen; + - repeat. + + */ +static void +main_loop (saver_info *si) +{ + saver_preferences *p = &si->prefs; + Bool ok_to_unblank; + + while (1) + { + Bool was_locked = False; + + if (p->verbose_p) + fprintf (stderr, "%s: awaiting idleness.\n", blurb()); + + check_for_leaks ("unblanked A"); + sleep_until_idle (si, True); + check_for_leaks ("unblanked B"); + + if (p->verbose_p) + { + if (si->demoing_p) + fprintf (stderr, "%s: demoing %d at %s.\n", blurb(), + si->selection_mode, timestring()); + else + fprintf (stderr, "%s: blanking screen at %s.\n", blurb(), + timestring()); + } + + maybe_reload_init_file (si); + + if (p->mode == DONT_BLANK) + { + if (p->verbose_p) + fprintf (stderr, "%s: idle with blanking disabled at %s.\n", + blurb(), timestring()); + + /* Go around the loop and wait for the next bout of idleness, + or for the init file to change, or for a remote command to + come in, or something. + + But, if locked_p is true, go ahead. This can only happen + if we're in "disabled" mode but a "lock" clientmessage came + in: in that case, we should go ahead and blank/lock the screen. + */ + if (!si->locked_p) + continue; + } + + /* Since we're about to blank the screen, kill the de-race timer, + if any. It might still be running if we have unblanked and then + re-blanked in a short period (e.g., when using the "next" button + in xscreensaver-demo.) + */ + if (si->de_race_id) + { + if (p->verbose_p) + fprintf (stderr, "%s: stopping de-race timer (%d remaining.)\n", + blurb(), si->de_race_ticks); + XtRemoveTimeOut (si->de_race_id); + si->de_race_id = 0; + } + + + /* Now, try to blank. + */ + + if (! blank_screen (si)) + { + /* We were unable to grab either the keyboard or mouse. + This means we did not (and must not) blank the screen. + If we were to blank the screen while some other program + is holding both the mouse and keyboard grabbed, then + we would never be able to un-blank it! We would never + see any events, and the display would be wedged. + + So, just go around the loop again and wait for the + next bout of idleness. (If the user remains idle, we + will next try to blank the screen again in no more than + 60 seconds.) + */ + Time retry = 60 * 1000; + if (p->timeout < retry) + retry = p->timeout; + + if (p->debug_p) + { + fprintf (stderr, + "%s: DEBUG MODE: unable to grab -- BLANKING ANYWAY.\n", + blurb()); + } + else + { + fprintf (stderr, + "%s: unable to grab keyboard or mouse! Blanking aborted.\n", + blurb()); + + schedule_wakeup_event (si, retry, p->debug_p); + continue; + } + } + + kill_screenhack (si); + + if (!si->throttled_p) + spawn_screenhack (si, True); + else if (p->verbose_p) + fprintf (stderr, "%s: not launching hack (throttled.)\n", blurb()); + + /* Don't start the cycle timer in demo mode. */ + if (!si->demoing_p && p->cycle) + si->cycle_id = XtAppAddTimeOut (si->app, + (si->selection_mode + /* see comment in cycle_timer() */ + ? 1000 * 60 * 60 + : p->cycle), + cycle_timer, + (XtPointer) si); + #ifndef NO_LOCKING - if (si->locked_p) - { - Bool val; - if (si->locking_disabled_p) abort (); - si->dbox_up_p = True; - - /* We used to ungrab the keyboard here, before calling unlock_p() - to pop up the dialog box. This left the keyboard ungrabbed - for a small window, during an insecure state. Bennett Todd - was seeing the bahavior that, when the load was high, he could - actually get characters through to a shell under the saver - window (he accidentally typed his password there...) - - So the ungrab has been moved down into pop_passwd_dialog() - just after the server is grabbed, closing this window - entirely. - */ - /* ungrab_keyboard_and_mouse (); */ - - { - saver_screen_info *ssi = si->default_screen; - suspend_screenhack (si, True); - XUndefineCursor (si->dpy, ssi->screensaver_window); - if (p->verbose_p) - printf ("%s: prompting for password.\n", progname); - val = unlock_p (si); - if (p->verbose_p && val == False) - printf ("%s: password incorrect!\n", progname); - si->dbox_up_p = False; - XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor); - suspend_screenhack (si, False); - - /* I think this grab is now redundant, but it shouldn't hurt. - */ - if (!si->demo_mode_p) - grab_keyboard_and_mouse (si->dpy, ssi->screensaver_window, - ssi->cursor); - } - - if (! val) - goto PASSWD_INVALID; - si->locked_p = False; - } -#endif - unblank_screen (si); - kill_screenhack (si); - if (si->cycle_id) - { - XtRemoveTimeOut (si->cycle_id); - si->cycle_id = 0; - } + /* Maybe start locking the screen. + */ + { + Time lock_timeout = p->lock_timeout; + + if (si->emergency_lock_p && p->lock_p && lock_timeout) + { + int secs = p->lock_timeout / 1000; + if (p->verbose_p) + fprintf (stderr, + "%s: locking now, instead of waiting for %d:%02d:%02d.\n", + blurb(), + (secs / (60 * 60)), ((secs / 60) % 60), (secs % 60)); + lock_timeout = 0; + } + + si->emergency_lock_p = False; + + if (!si->demoing_p && /* if not going into demo mode */ + p->lock_p && /* and locking is enabled */ + !si->locking_disabled_p && /* and locking is possible */ + lock_timeout == 0) /* and locking is not timer-deferred */ + set_locked_p (si, True); /* then lock right now. */ + + /* locked_p might be true already because of the above, or because of + the LOCK ClientMessage. But if not, and if we're supposed to lock + after some time, set up a timer to do so. + */ + if (p->lock_p && + !si->locked_p && + lock_timeout > 0) + si->lock_id = XtAppAddTimeOut (si->app, lock_timeout, + activate_lock_timer, + (XtPointer) si); + } +#endif /* !NO_LOCKING */ + + + ok_to_unblank = True; + do { + + check_for_leaks ("blanked A"); + sleep_until_idle (si, False); /* until not idle */ + check_for_leaks ("blanked B"); + + maybe_reload_init_file (si); + #ifndef NO_LOCKING - if (si->lock_id) - { - XtRemoveTimeOut (si->lock_id); - si->lock_id = 0; - } -#endif - if (p->verbose_p) - printf ("%s: user is active; going to sleep at %s.\n", progname, - timestring ()); + /* Maybe unlock the screen. + */ + if (si->locked_p) + { + saver_screen_info *ssi = si->default_screen; + if (si->locking_disabled_p) abort (); + + was_locked = True; + si->dbox_up_p = True; + suspend_screenhack (si, True); + XUndefineCursor (si->dpy, ssi->screensaver_window); + + ok_to_unblank = unlock_p (si); + + si->dbox_up_p = False; + XDefineCursor (si->dpy, ssi->screensaver_window, ssi->cursor); + suspend_screenhack (si, False); /* resume */ + + if (!ok_to_unblank && + !screenhack_running_p (si)) + { + /* If the lock dialog has been dismissed and we're not about to + unlock the screen, and there is currently no hack running, + then launch one. (There might be no hack running if DPMS + had kicked in. But DPMS is off now, so bring back the hack) + */ + if (si->cycle_id) + XtRemoveTimeOut (si->cycle_id); + si->cycle_id = 0; + cycle_timer ((XtPointer) si, 0); + } + } +#endif /* !NO_LOCKING */ + + } while (!ok_to_unblank); + + + if (p->verbose_p) + fprintf (stderr, "%s: unblanking screen at %s.\n", + blurb(), timestring ()); + + /* Kill before unblanking, to stop drawing as soon as possible. */ + kill_screenhack (si); + unblank_screen (si); + + set_locked_p (si, False); + si->emergency_lock_p = False; + si->demoing_p = 0; + si->selection_mode = 0; + + /* If we're throttled, and the user has explicitly unlocked the screen, + then unthrottle. If we weren't locked, then don't unthrottle + automatically, because someone might have just bumped the desk... */ + if (was_locked) + { + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + } + + if (si->cycle_id) + { + XtRemoveTimeOut (si->cycle_id); + si->cycle_id = 0; } + + if (si->lock_id) + { + XtRemoveTimeOut (si->lock_id); + si->lock_id = 0; + } + + /* Since we're unblanked now, break race conditions and make + sure we stay that way (see comment in timers.c.) */ + if (! si->de_race_id) + de_race_timer ((XtPointer) si, 0); } } +static void analyze_display (saver_info *si); +static void fix_fds (void); + +int +main (int argc, char **argv) +{ + Widget shell; + saver_info the_si; + saver_info *si = &the_si; + saver_preferences *p = &si->prefs; + struct passwd *spasswd; + int i; + + memset(si, 0, sizeof(*si)); + global_si_kludge = si; /* I hate C so much... */ + + fix_fds(); + +# undef ya_rand_init + ya_rand_init (0); + + save_argv (argc, argv); + set_version_string (si, &argc, argv); + privileged_initialization (si, &argc, argv); + hack_environment (si); + + spasswd = getpwuid(getuid()); + if (!spasswd) + { + fprintf(stderr, "Could not figure out who the current user is!\n"); + return 1; + } + + si->user = strdup(spasswd->pw_name ? spasswd->pw_name : "(unknown)"); + +# ifndef NO_LOCKING + si->unlock_cb = gui_auth_conv; + si->auth_finished_cb = auth_finished_cb; +# endif /* !NO_LOCKING */ + + shell = connect_to_server (si, &argc, argv); + process_command_line (si, &argc, argv); + print_banner (si); + + load_init_file(si->dpy, p); /* must be before initialize_per_screen_info() */ + blurb_timestamp_p = p->timestamp_p; /* kludge */ + initialize_per_screen_info (si, shell); /* also sets si->fading_possible_p */ + + /* We can only issue this warning now. */ + if (p->verbose_p && !si->fading_possible_p && (p->fade_p || p->unfade_p)) + fprintf (stderr, + "%s: there are no PseudoColor or GrayScale visuals.\n" + "%s: ignoring the request for fading/unfading.\n", + blurb(), blurb()); + + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + if (ssi->real_screen_p) + if (ensure_no_screensaver_running (si->dpy, si->screens[i].screen)) + exit (1); + } + + lock_initialization (si, &argc, argv); + print_lock_failure_banner (si); + + if (p->xsync_p) XSynchronize (si->dpy, True); + + if (p->verbose_p) analyze_display (si); + initialize_server_extensions (si); + + si->blank_time = time ((time_t) 0); /* must be before ..._window */ + initialize_screensaver_window (si); + + select_events (si); + init_sigchld (); + + disable_builtin_screensaver (si, True); + sync_server_dpms_settings (si->dpy, + (p->dpms_enabled_p && + p->mode != DONT_BLANK), + p->dpms_standby / 1000, + p->dpms_suspend / 1000, + p->dpms_off / 1000, + False); + + initialize_stderr (si); + handle_signals (si); + + make_splash_dialog (si); + + main_loop (si); /* doesn't return */ + return 0; +} + +static void +fix_fds (void) +{ + /* Bad Things Happen if stdin, stdout, and stderr have been closed + (as by the `sh incantation "xscreensaver >&- 2>&-"). When you do + that, the X connection gets allocated to one of these fds, and + then some random library writes to stderr, and random bits get + stuffed down the X pipe, causing "Xlib: sequence lost" errors. + So, we cause the first three file descriptors to be open to + /dev/null if they aren't open to something else already. This + must be done before any other files are opened (or the closing + of that other file will again free up one of the "magic" first + three FDs.) + + We do this by opening /dev/null three times, and then closing + those fds, *unless* any of them got allocated as #0, #1, or #2, + in which case we leave them open. Gag. + + Really, this crap is technically required of *every* X program, + if you want it to be robust in the face of "2>&-". + */ + int fd0 = open ("/dev/null", O_RDWR); + int fd1 = open ("/dev/null", O_RDWR); + int fd2 = open ("/dev/null", O_RDWR); + if (fd0 > 2) close (fd0); + if (fd1 > 2) close (fd1); + if (fd2 > 2) close (fd2); +} + + +/* Processing ClientMessage events. + */ + + +static Bool error_handler_hit_p = False; + +static int +ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error) +{ + error_handler_hit_p = True; + return 0; +} + +/* Sometimes some systems send us ClientMessage events with bogus atoms in + them. We only look up the atom names for printing warning messages, + so don't bomb out when it happens... + */ +static char * +XGetAtomName_safe (Display *dpy, Atom atom) +{ + char *result; + XErrorHandler old_handler; + if (!atom) return 0; + + XSync (dpy, False); + error_handler_hit_p = False; + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + result = XGetAtomName (dpy, atom); + XSync (dpy, False); + XSetErrorHandler (old_handler); + XSync (dpy, False); + if (error_handler_hit_p) result = 0; + + if (result) + return result; + else + { + char buf[100]; + sprintf (buf, "<>", (unsigned int) atom); + return strdup (buf); + } +} + + +static void +clientmessage_response (saver_info *si, Window w, Bool error, + const char *stderr_msg, + const char *protocol_msg) +{ + char *proto; + int L; + saver_preferences *p = &si->prefs; + XErrorHandler old_handler; + + if (error || p->verbose_p) + fprintf (stderr, "%s: %s\n", blurb(), stderr_msg); + + L = strlen(protocol_msg); + proto = (char *) malloc (L + 2); + proto[0] = (error ? '-' : '+'); + strcpy (proto+1, protocol_msg); + L++; + + /* Ignore all X errors while sending a response to a ClientMessage. + Pretty much the only way we could get an error here is if the + window we're trying to send the reply on has been deleted, in + which case, the sender of the ClientMessage won't see our response + anyway. + */ + XSync (si->dpy, False); + error_handler_hit_p = False; + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + + XChangeProperty (si->dpy, w, XA_SCREENSAVER_RESPONSE, XA_STRING, 8, + PropModeReplace, (unsigned char *) proto, L); + + XSync (si->dpy, False); + XSetErrorHandler (old_handler); + XSync (si->dpy, False); + + free (proto); +} + + +static void +bogus_clientmessage_warning (saver_info *si, XEvent *event) +{ +#if 0 /* Oh, fuck it. GNOME likes to spew random ClientMessages at us + all the time. This is presumably indicative of an error in + the sender of that ClientMessage: if we're getting it and + ignoring it, then it's not reaching the intended recipient. + But people complain to me about this all the time ("waaah! + xscreensaver is printing to it's stderr and that gets my + panties all in a bunch!") And I'm sick of hearing about it. + So we'll just ignore these messages and let GNOME go right + ahead and continue to stumble along in its malfunction. + */ + + saver_preferences *p = &si->prefs; + char *str = XGetAtomName_safe (si->dpy, event->xclient.message_type); + Window w = event->xclient.window; + char wdesc[255]; + int screen = 0; + Bool root_p = False; + + *wdesc = 0; + for (screen = 0; screen < si->nscreens; screen++) + if (w == si->screens[screen].screensaver_window) + { + strcpy (wdesc, "xscreensaver"); + break; + } + else if (w == RootWindow (si->dpy, screen)) + { + strcpy (wdesc, "root"); + root_p = True; + break; + } + + /* If this ClientMessage was sent to the real root window instead of to the + xscreensaver window, then it might be intended for someone else who is + listening on the root window (e.g., the window manager). So only print + the warning if: we are in debug mode; or if the bogus message was + actually sent to one of the xscreensaver-created windows. + */ + if (root_p && !p->debug_p) + return; + + if (!*wdesc) + { + XErrorHandler old_handler; + XClassHint hint; + XWindowAttributes xgwa; + memset (&hint, 0, sizeof(hint)); + memset (&xgwa, 0, sizeof(xgwa)); + + XSync (si->dpy, False); + old_handler = XSetErrorHandler (ignore_all_errors_ehandler); + XGetClassHint (si->dpy, w, &hint); + XGetWindowAttributes (si->dpy, w, &xgwa); + XSync (si->dpy, False); + XSetErrorHandler (old_handler); + XSync (si->dpy, False); + + screen = (xgwa.screen ? screen_number (xgwa.screen) : -1); + + sprintf (wdesc, "%.20s / %.20s", + (hint.res_name ? hint.res_name : "(null)"), + (hint.res_class ? hint.res_class : "(null)")); + if (hint.res_name) XFree (hint.res_name); + if (hint.res_class) XFree (hint.res_class); + } + + fprintf (stderr, "%s: %d: unrecognised ClientMessage \"%s\" received\n", + blurb(), screen, (str ? str : "(null)")); + fprintf (stderr, "%s: %d: for window 0x%lx (%s)\n", + blurb(), screen, (unsigned long) w, wdesc); + if (str) XFree (str); + +#endif /* 0 */ +} + Bool handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) { saver_preferences *p = &si->prefs; Atom type = 0; - if (event->xclient.message_type != XA_SCREENSAVER) - { - char *str; - str = XGetAtomName (si->dpy, event->xclient.message_type); - fprintf (stderr, "%s: unrecognised ClientMessage type %s received\n", - progname, (str ? str : "(null)")); - if (str) XFree (str); - return False; - } - if (event->xclient.format != 32) + Window window = event->xclient.window; + + /* Preferences might affect our handling of client messages. */ + maybe_reload_init_file (si); + + if (event->xclient.message_type != XA_SCREENSAVER || + event->xclient.format != 32) { - fprintf (stderr, "%s: ClientMessage of format %d received, not 32\n", - progname, event->xclient.format); + bogus_clientmessage_warning (si, event); return False; } @@ -936,9 +1799,25 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) { if (until_idle_p) { - if (p->verbose_p) - printf ("%s: ACTIVATE ClientMessage received.\n", progname); - if (p->use_mit_saver_extension || p->use_sgi_saver_extension) + if (p->mode == DONT_BLANK) + { + clientmessage_response(si, window, True, + "ACTIVATE ClientMessage received in DONT_BLANK mode.", + "screen blanking is currently disabled."); + return False; + } + + clientmessage_response(si, window, False, + "ACTIVATE ClientMessage received.", + "activating."); + si->selection_mode = 0; + si->demoing_p = False; + + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + + if (si->using_mit_saver_extension || si->using_sgi_saver_extension) { XForceScreenSaver (si->dpy, ScreenSaverActive); return False; @@ -948,17 +1827,22 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) return True; } } - fprintf (stderr, - "%s: ClientMessage ACTIVATE received while already active.\n", - progname); + clientmessage_response(si, window, True, + "ClientMessage ACTIVATE received while already active.", + "already active."); } else if (type == XA_DEACTIVATE) { if (! until_idle_p) { - if (p->verbose_p) - printf ("%s: DEACTIVATE ClientMessage received.\n", progname); - if (p->use_mit_saver_extension || p->use_sgi_saver_extension) + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + + clientmessage_response(si, window, False, + "DEACTIVATE ClientMessage received.", + "deactivating."); + if (si->using_mit_saver_extension || si->using_sgi_saver_extension) { XForceScreenSaver (si->dpy, ScreenSaverReset); return False; @@ -968,31 +1852,84 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) return True; } } - fprintf (stderr, - "%s: ClientMessage DEACTIVATE received while inactive.\n", - progname); + clientmessage_response(si, window, False, + "ClientMessage DEACTIVATE received while inactive: resetting idle timer.", + "not active: idle timer reset."); + reset_timers (si); } else if (type == XA_CYCLE) { if (! until_idle_p) { - if (p->verbose_p) - printf ("%s: CYCLE ClientMessage received.\n", progname); + clientmessage_response(si, window, False, + "CYCLE ClientMessage received.", + "cycling."); + si->selection_mode = 0; /* 0 means randomize when its time. */ + si->demoing_p = False; + + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + if (si->cycle_id) XtRemoveTimeOut (si->cycle_id); si->cycle_id = 0; cycle_timer ((XtPointer) si, 0); return False; } - fprintf (stderr, "%s: ClientMessage CYCLE received while inactive.\n", - progname); + clientmessage_response(si, window, True, + "ClientMessage CYCLE received while inactive.", + "not active."); } else if (type == XA_NEXT || type == XA_PREV) { - if (p->verbose_p) - printf ("%s: %s ClientMessage received.\n", progname, - (type == XA_NEXT ? "NEXT" : "PREV")); - si->next_mode_p = 1 + (type == XA_PREV); + clientmessage_response(si, window, False, + (type == XA_NEXT + ? "NEXT ClientMessage received." + : "PREV ClientMessage received."), + "cycling."); + si->selection_mode = (type == XA_NEXT ? -1 : -2); + si->demoing_p = False; + + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + + if (! until_idle_p) + { + if (si->cycle_id) + XtRemoveTimeOut (si->cycle_id); + si->cycle_id = 0; + cycle_timer ((XtPointer) si, 0); + } + else + return True; + } + else if (type == XA_SELECT) + { + char buf [255]; + char buf2 [255]; + long which = event->xclient.data.l[1]; + + if (p->mode == DONT_BLANK) + { + clientmessage_response(si, window, True, + "SELECT ClientMessage received in DONT_BLANK mode.", + "screen blanking is currently disabled."); + return False; + } + + sprintf (buf, "SELECT %ld ClientMessage received.", which); + sprintf (buf2, "activating (%ld).", which); + clientmessage_response (si, window, False, buf, buf2); + + if (which < 0) which = 0; /* 0 == "random" */ + si->selection_mode = which; + si->demoing_p = False; + + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; if (! until_idle_p) { @@ -1009,19 +1946,21 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) /* Ignore EXIT message if the screen is locked. */ if (until_idle_p || !si->locked_p) { - if (p->verbose_p) - printf ("%s: EXIT ClientMessage received.\n", progname); + clientmessage_response (si, window, False, + "EXIT ClientMessage received.", + "exiting."); if (! until_idle_p) { unblank_screen (si); kill_screenhack (si); XSync (si->dpy, False); } - saver_exit (si, 0); + saver_exit (si, 0, 0); } else - fprintf (stderr, "%s: EXIT ClientMessage received while locked.\n", - progname); + clientmessage_response (si, window, True, + "EXIT ClientMessage received while locked.", + "screen is locked."); } else if (type == XA_RESTART) { @@ -1030,8 +1969,9 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) */ if (until_idle_p || !si->locked_p) { - if (p->verbose_p) - printf ("%s: RESTART ClientMessage received.\n", progname); + clientmessage_response (si, window, False, + "RESTART ClientMessage received.", + "restarting."); if (! until_idle_p) { unblank_screen (si); @@ -1039,55 +1979,84 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) XSync (si->dpy, False); } - /* make sure error message shows up before exit. */ - if (real_stderr && stderr != real_stderr) - dup2 (fileno(real_stderr), fileno(stderr)); - - restart_process (si); - exit (1); /* shouldn't get here; but if restarting didn't work, - make this command be the same as EXIT. */ + restart_process (si); /* does not return */ + abort(); } else - fprintf(stderr, "%s: RESTART ClientMessage received while locked.\n", - progname); + clientmessage_response (si, window, True, + "RESTART ClientMessage received while locked.", + "screen is locked."); } else if (type == XA_DEMO) { -#ifdef NO_DEMO_MODE - fprintf (stderr, "%s: not compiled with support for DEMO mode\n", - progname); -#else - if (until_idle_p) + long arg = event->xclient.data.l[1]; + Bool demo_one_hack_p = (arg == 5000); + + if (demo_one_hack_p) + { + if (until_idle_p) + { + long which = event->xclient.data.l[2]; + char buf [255]; + char buf2 [255]; + sprintf (buf, "DEMO %ld ClientMessage received.", which); + sprintf (buf2, "demoing (%ld).", which); + clientmessage_response (si, window, False, buf, buf2); + + if (which < 0) which = 0; /* 0 == "random" */ + si->selection_mode = which; + si->demoing_p = True; + + if (si->throttled_p && p->verbose_p) + fprintf (stderr, "%s: unthrottled.\n", blurb()); + si->throttled_p = False; + + return True; + } + + clientmessage_response (si, window, True, + "DEMO ClientMessage received while active.", + "already active."); + } + else { - if (p->verbose_p) - printf ("%s: DEMO ClientMessage received.\n", progname); - si->demo_mode_p = True; - return True; + clientmessage_response (si, window, True, + "obsolete form of DEMO ClientMessage.", + "obsolete form of DEMO ClientMessage."); } - fprintf (stderr, - "%s: DEMO ClientMessage received while active.\n", progname); -#endif + } + else if (type == XA_PREFS) + { + clientmessage_response (si, window, True, + "the PREFS client-message is obsolete.", + "the PREFS client-message is obsolete."); } else if (type == XA_LOCK) { #ifdef NO_LOCKING - fprintf (stderr, "%s: not compiled with support for LOCK mode\n", - progname); -#else + clientmessage_response (si, window, True, + "not compiled with support for locking.", + "locking not enabled."); +#else /* !NO_LOCKING */ if (si->locking_disabled_p) - fprintf (stderr, - "%s: LOCK ClientMessage received, but locking is disabled.\n", - progname); + clientmessage_response (si, window, True, + "LOCK ClientMessage received, but locking is disabled.", + "locking not enabled."); else if (si->locked_p) - fprintf (stderr, - "%s: LOCK ClientMessage received while already locked.\n", - progname); + clientmessage_response (si, window, True, + "LOCK ClientMessage received while already locked.", + "already locked."); else { - si->locked_p = True; - if (p->verbose_p) - printf ("%s: LOCK ClientMessage received;%s locking.\n", - progname, until_idle_p ? " activating and" : ""); + char buf [255]; + char *response = (until_idle_p + ? "activating and locking." + : "locking."); + sprintf (buf, "LOCK ClientMessage received; %s", response); + clientmessage_response (si, window, False, buf, response); + set_locked_p (si, True); + si->selection_mode = 0; + si->demoing_p = False; if (si->lock_id) /* we're doing it now, so lose the timeout */ { @@ -1097,7 +2066,8 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) if (until_idle_p) { - if (p->use_mit_saver_extension || p->use_sgi_saver_extension) + if (si->using_mit_saver_extension || + si->using_sgi_saver_extension) { XForceScreenSaver (si->dpy, ScreenSaverActive); return False; @@ -1108,21 +2078,329 @@ handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p) } } } -#endif +#endif /* !NO_LOCKING */ + } + else if (type == XA_THROTTLE) + { + /* The THROTTLE command is deprecated -- it predates the XDPMS + extension. Instead of using -throttle, users should instead + just power off the monitor (e.g., "xset dpms force off".) + In a few minutes, xscreensaver will notice that the monitor + is off, and cease running hacks. + */ + if (si->throttled_p) + clientmessage_response (si, window, True, + "THROTTLE ClientMessage received, but " + "already throttled.", + "already throttled."); + else + { + char buf [255]; + char *response = "throttled."; + si->throttled_p = True; + si->selection_mode = 0; + si->demoing_p = False; + sprintf (buf, "THROTTLE ClientMessage received; %s", response); + clientmessage_response (si, window, False, buf, response); + + if (! until_idle_p) + { + if (si->cycle_id) + XtRemoveTimeOut (si->cycle_id); + si->cycle_id = 0; + cycle_timer ((XtPointer) si, 0); + } + } + } + else if (type == XA_UNTHROTTLE) + { + if (! si->throttled_p) + clientmessage_response (si, window, True, + "UNTHROTTLE ClientMessage received, but " + "not throttled.", + "not throttled."); + else + { + char buf [255]; + char *response = "unthrottled."; + si->throttled_p = False; + si->selection_mode = 0; + si->demoing_p = False; + sprintf (buf, "UNTHROTTLE ClientMessage received; %s", response); + clientmessage_response (si, window, False, buf, response); + + if (! until_idle_p) + { + if (si->cycle_id) + XtRemoveTimeOut (si->cycle_id); + si->cycle_id = 0; + cycle_timer ((XtPointer) si, 0); + } + } } else { + char buf [1024]; char *str; - str = (type ? XGetAtomName(si->dpy, type) : 0); + str = XGetAtomName_safe (si->dpy, type); + if (str) - fprintf (stderr, - "%s: unrecognised screensaver ClientMessage %s received\n", - progname, str); + { + if (strlen (str) > 80) + strcpy (str+70, "..."); + sprintf (buf, "unrecognised screensaver ClientMessage %s received.", + str); + free (str); + } else - fprintf (stderr, - "%s: unrecognised screensaver ClientMessage 0x%x received\n", - progname, (unsigned int) event->xclient.data.l[0]); - if (str) XFree (str); + { + sprintf (buf, + "unrecognised screensaver ClientMessage 0x%x received.", + (unsigned int) event->xclient.data.l[0]); + } + + clientmessage_response (si, window, True, buf, buf); } return False; } + + +/* Some random diagnostics printed in -verbose mode. + */ + +static void +analyze_display (saver_info *si) +{ + int i, j; + static struct { + const char *name; const char *desc; Bool useful_p; + } exts[] = { + + { "SCREEN_SAVER", /* underscore */ "SGI Screen-Saver", +# ifdef HAVE_SGI_SAVER_EXTENSION + True +# else + False +# endif + }, { "SCREEN-SAVER", /* dash */ "SGI Screen-Saver", +# ifdef HAVE_SGI_SAVER_EXTENSION + True +# else + False +# endif + }, { "MIT-SCREEN-SAVER", "MIT Screen-Saver", +# ifdef HAVE_MIT_SAVER_EXTENSION + True +# else + False +# endif + }, { "XIDLE", "XIdle", +# ifdef HAVE_XIDLE_EXTENSION + True +# else + False +# endif + }, { "SGI-VIDEO-CONTROL", "SGI Video-Control", +# ifdef HAVE_SGI_VC_EXTENSION + True +# else + False +# endif + }, { "READDISPLAY", "SGI Read-Display", +# ifdef HAVE_READ_DISPLAY_EXTENSION + True +# else + False +# endif + }, { "MIT-SHM", "Shared Memory", +# ifdef HAVE_XSHM_EXTENSION + True +# else + False +# endif + }, { "DOUBLE-BUFFER", "Double-Buffering", +# ifdef HAVE_DOUBLE_BUFFER_EXTENSION + True +# else + False +# endif + }, { "DPMS", "Power Management", +# ifdef HAVE_DPMS_EXTENSION + True +# else + False +# endif + }, { "GLX", "GLX", +# ifdef HAVE_GL + True +# else + False +# endif + }, { "XFree86-VidModeExtension", "XF86 Video-Mode", +# ifdef HAVE_XF86VMODE + True +# else + False +# endif + }, { "XINERAMA", "Xinerama", +# ifdef HAVE_XINERAMA + True +# else + False +# endif + }, { "RANDR", "Resize-and-Rotate", +# ifdef HAVE_RANDR + True +# else + False +# endif + }, { "Apple-DRI", "Apple-DRI (XDarwin)", + True + }, + }; + + fprintf (stderr, "%s: running on display \"%s\" (%d %sscreen%s).\n", + blurb(), + DisplayString(si->dpy), + si->nscreens, + (si->xinerama_p ? "Xinerama " : ""), + (si->nscreens == 1 ? "" : "s")); + fprintf (stderr, "%s: vendor is %s, %d.\n", blurb(), + ServerVendor(si->dpy), VendorRelease(si->dpy)); + + fprintf (stderr, "%s: useful extensions:\n", blurb()); + for (i = 0; i < countof(exts); i++) + { + int op = 0, event = 0, error = 0; + char buf [255]; + int j; + if (!XQueryExtension (si->dpy, exts[i].name, &op, &event, &error)) + continue; + sprintf (buf, "%s: ", blurb()); + j = strlen (buf); + strcat (buf, exts[i].desc); + if (!exts[i].useful_p) + strcat (buf, " (disabled at compile time)"); + fprintf (stderr, "%s\n", buf); + } + + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + unsigned long colormapped_depths = 0; + unsigned long non_mapped_depths = 0; + XVisualInfo vi_in, *vi_out; + int out_count; + + if (!ssi->real_screen_p) continue; + + vi_in.screen = ssi->real_screen_number; + vi_out = XGetVisualInfo (si->dpy, VisualScreenMask, &vi_in, &out_count); + if (!vi_out) continue; + for (j = 0; j < out_count; j++) + if (vi_out[j].class == PseudoColor) + colormapped_depths |= (1 << vi_out[j].depth); + else + non_mapped_depths |= (1 << vi_out[j].depth); + XFree ((char *) vi_out); + + if (colormapped_depths) + { + fprintf (stderr, "%s: screen %d colormapped depths:", blurb(), + ssi->real_screen_number); + for (j = 0; j < 32; j++) + if (colormapped_depths & (1 << j)) + fprintf (stderr, " %d", j); + fprintf (stderr, ".\n"); + } + if (non_mapped_depths) + { + fprintf (stderr, "%s: screen %d non-colormapped depths:", + blurb(), ssi->real_screen_number); + for (j = 0; j < 32; j++) + if (non_mapped_depths & (1 << j)) + fprintf (stderr, " %d", j); + fprintf (stderr, ".\n"); + } + } + + if (si->xinerama_p) + { + fprintf (stderr, "%s: Xinerama layout:\n", blurb()); + for (i = 0; i < si->nscreens; i++) + { + saver_screen_info *ssi = &si->screens[i]; + fprintf (stderr, "%s: %c %d/%d: %dx%d+%d+%d\n", + blurb(), + (ssi->real_screen_p ? '+' : ' '), + ssi->number, ssi->real_screen_number, + ssi->width, ssi->height, ssi->x, ssi->y); + } + } +} + +Bool +display_is_on_console_p (saver_info *si) +{ + Bool not_on_console = True; + char *dpystr = DisplayString (si->dpy); + char *tail = (char *) strchr (dpystr, ':'); + if (! tail || strncmp (tail, ":0", 2)) + not_on_console = True; + else + { + char dpyname[255], localname[255]; + strncpy (dpyname, dpystr, tail-dpystr); + dpyname [tail-dpystr] = 0; + if (!*dpyname || + !strcmp(dpyname, "unix") || + !strcmp(dpyname, "localhost")) + not_on_console = False; + else if (gethostname (localname, sizeof (localname))) + not_on_console = True; /* can't find hostname? */ + else if (!strncmp (dpyname, "/tmp/launch-", 12)) /* MacOS X launchd */ + not_on_console = False; + else + { + /* We have to call gethostbyname() on the result of gethostname() + because the two aren't guarenteed to be the same name for the + same host: on some losing systems, one is a FQDN and the other + is not. Here in the wide wonderful world of Unix it's rocket + science to obtain the local hostname in a portable fashion. + + And don't forget, gethostbyname() reuses the structure it + returns, so we have to copy the fucker before calling it again. + Thank you master, may I have another. + */ + struct hostent *h = gethostbyname (dpyname); + if (!h) + not_on_console = True; + else + { + char hn [255]; + struct hostent *l; + strcpy (hn, h->h_name); + l = gethostbyname (localname); + not_on_console = (!l || !!(strcmp (l->h_name, hn))); + } + } + } + return !not_on_console; +} + + +/* Do a little bit of heap introspection... + */ +void +check_for_leaks (const char *where) +{ +#if defined(HAVE_SBRK) && defined(LEAK_PARANOIA) + static unsigned long last_brk = 0; + int b = (unsigned long) sbrk(0); + if (last_brk && last_brk < b) + fprintf (stderr, "%s: %s: brk grew by %luK.\n", + blurb(), where, + (((b - last_brk) + 1023) / 1024)); + last_brk = b; +#endif /* HAVE_SBRK */ +}