-/* xscreensaver, Copyright (c) 1991-1999 Jamie Zawinski <jwz@jwz.org>
+/* xscreensaver, Copyright (c) 1991-2003 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* This program accepts ClientMessages of type SCREENSAVER; these messages
* may contain the atom ACTIVATE or DEACTIVATE, 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
* 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
* to keep your emacs window alive even when xscreensaver has grabbed.
* - 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
#include <stdio.h>
#include <ctype.h>
#include <X11/Xlib.h>
+
+#include <X11/Xlibint.h>
+
#include <X11/Xatom.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/Xos.h>
+#include <time.h>
+#include <sys/time.h>
#include <netdb.h> /* for gethostbyname() */
#ifdef HAVE_XMU
# ifndef VMS
static Atom XA_SCREENSAVER_RESPONSE;
static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV;
-static Atom XA_EXIT, XA_RESTART, XA_LOCK, XA_SELECT;
+static Atom XA_RESTART, XA_SELECT;
static Atom XA_THROTTLE, XA_UNTHROTTLE;
-Atom XA_DEMO, XA_PREFS;
+Atom XA_DEMO, XA_PREFS, XA_EXIT, XA_LOCK, XA_BLANK;
\f
static XrmOptionDescRec options [] = {
+
+ { "-verbose", ".verbose", XrmoptionNoArg, "on" },
+ { "-silent", ".verbose", 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" },
+
+ /* There's really no reason to have these command-line args; they just
+ lead to confusion when the .xscreensaver file has conflicting values.
+ */
+#if 0
+ { "-splash", ".splash", XrmoptionNoArg, "on" },
+ { "-capture-stderr", ".captureStderr", XrmoptionNoArg, "on" },
{ "-timeout", ".timeout", XrmoptionSepArg, 0 },
{ "-cycle", ".cycle", XrmoptionSepArg, 0 },
{ "-lock-mode", ".lock", XrmoptionNoArg, "on" },
{ "-visual", ".visualID", XrmoptionSepArg, 0 },
{ "-install", ".installColormap", XrmoptionNoArg, "on" },
{ "-no-install", ".installColormap", XrmoptionNoArg, "off" },
- { "-verbose", ".verbose", XrmoptionNoArg, "on" },
- { "-silent", ".verbose", XrmoptionNoArg, "off" },
{ "-timestamp", ".timestamp", XrmoptionNoArg, "on" },
- { "-capture-stderr", ".captureStderr", XrmoptionNoArg, "on" },
- { "-no-capture-stderr", ".captureStderr", XrmoptionNoArg, "off" },
{ "-xidle-extension", ".xidleExtension", XrmoptionNoArg, "on" },
{ "-no-xidle-extension", ".xidleExtension", XrmoptionNoArg, "off" },
{ "-mit-extension", ".mitSaverExtension",XrmoptionNoArg, "on" },
{ "-no-sgi-extension", ".sgiSaverExtension",XrmoptionNoArg, "off" },
{ "-proc-interrupts", ".procInterrupts", XrmoptionNoArg, "on" },
{ "-no-proc-interrupts", ".procInterrupts", XrmoptionNoArg, "off" },
- { "-splash", ".splash", XrmoptionNoArg, "on" },
- { "-no-splash", ".splash", XrmoptionNoArg, "off" },
- { "-nosplash", ".splash", XrmoptionNoArg, "off" },
{ "-idelay", ".initialDelay", XrmoptionSepArg, 0 },
{ "-nice", ".nice", XrmoptionSepArg, 0 },
-
- /* Actually these are built in to Xt, but just to be sure... */
- { "-synchronous", ".synchronous", XrmoptionNoArg, "on" },
- { "-xrm", NULL, XrmoptionResArg, NULL }
+#endif /* 0 */
};
static char *defaults[] = {
fflush (stdout);
fflush (stderr);
fprintf (stdout, "\
-xscreensaver %s, copyright (c) 1991-1999 by Jamie Zawinski <jwz@jwz.org>\n\
-The standard Xt command-line options are accepted; other options include:\n\
-\n\
- -timeout <minutes> When the screensaver should activate.\n\
- -cycle <minutes> How long to let each hack run before switching.\n\
- -lock-mode Require a password before deactivating.\n\
- -lock-timeout <minutes> Grace period before locking; default 0.\n\
- -visual <id-or-class> Which X visual to run on.\n\
- -install Install a private colormap.\n\
- -verbose Be loud.\n\
- -no-splash Don't display a splash-screen at startup.\n\
- -help This message.\n\
+xscreensaver %s, copyright (c) 1991-2003 by Jamie Zawinski <jwz@jwz.org>\n\
\n\
-See the manual for other options and X resources.\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\
-The `xscreensaver' program should be left running in the background.\n\
-Use the `xscreensaver-demo' and `xscreensaver-command' programs to\n\
-manipulate a running xscreensaver.\n\
-\n\
-The `*programs' resource controls which graphics demos will be launched by\n\
-the screensaver. See `man xscreensaver' or the web page for more details.\n\
-\n\
-Just getting started? Try this:\n\
+ Just getting started? Try this:\n\
\n\
xscreensaver &\n\
xscreensaver-demo\n\
\n\
-For updates, check http://www.jwz.org/xscreensaver/\n\
+ For updates, online manual, and FAQ, please see the web page:\n\
+\n\
+ http://www.jwz.org/xscreensaver/\n\
\n",
si->version);
fflush (stdout);
saver_ehandler (Display *dpy, XErrorEvent *error)
{
saver_info *si = global_si_kludge; /* I hate C so much... */
+ int i;
+ Bool fatal_p;
if (!real_stderr) real_stderr = stderr;
fprintf (real_stderr, "\n"
"#######################################"
"#######################################\n\n"
- "%s: X Error! PLEASE REPORT THIS BUG.\n\n"
- "#######################################"
- "#######################################\n\n",
+ "%s: X Error! PLEASE REPORT THIS BUG.\n",
blurb());
- if (XmuPrintDefaultErrorMessage (dpy, error, real_stderr))
+
+ for (i = 0; i < si->nscreens; i++)
+ fprintf (real_stderr, "%s: screen %d: 0x%x, 0x%x, 0x%x\n",
+ blurb(), i,
+ (unsigned int) RootWindowOfScreen (si->screens[i].screen),
+ (unsigned int) si->screens[i].real_vroot,
+ (unsigned int) si->screens[i].screensaver_window);
+
+ fprintf (real_stderr, "\n"
+ "#######################################"
+ "#######################################\n\n");
+
+ fatal_p = XmuPrintDefaultErrorMessage (dpy, error, real_stderr);
+
+ 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.
+ */
+
+ fprintf (real_stderr, "\n");
+
+ if (! fatal_p)
+ fprintf (real_stderr, "%s: nonfatal error.\n\n", blurb());
+ else
{
- fprintf (real_stderr, "\n");
if (si->prefs.xsync_p)
{
saver_exit (si, -1, "because of synchronous X Error");
"#######################################"
"#######################################\n\n");
fprintf (real_stderr,
- " If at all possible, please re-run xscreensaver with the command line\n"
- " arguments `-sync -verbose', and reproduce this bug. That will cause\n"
- " xscreensaver to dump a `core' file to the current directory. Please\n"
- " include the stack trace from that core file in your bug report.\n"
+ " 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"
"\n"
- " http://www.jwz.org/xscreensaver/bugs.html explains how to create the\n"
- " most useful bug reports, and how to examine core files.\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 report\n"
+ " The more information you can provide, the better. But please\n"
" report this bug, regardless!\n"
"\n");
fprintf (real_stderr,
saver_exit (si, -1, 0);
}
}
- else
- fprintf (real_stderr, " (nonfatal.)\n");
+
return 0;
}
fprintf (stderr, "\n");
describe_uids (si, stderr);
- fprintf (stderr, "\n"
- "%s: Errors at startup are usually authorization problems.\n"
- " Did you read the manual? Specifically, the parts\n"
- " that talk about XAUTH, XDM, and root logins?\n"
- "\n"
- " http://www.jwz.org/xscreensaver/man.html\n"
- "\n",
+
+ if (si->orig_uid && !strncmp (si->orig_uid, "root/", 5))
+ {
+ 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
+ {
+ 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);
si->locking_disabled_p = True;
si->nolock_reason = "not compiled with locking support";
#else /* !NO_LOCKING */
- si->locking_disabled_p = False;
/* Finish initializing locking, now that we're out of privileged code. */
if (! lock_init (*argc, argv, si->prefs.verbose_p))
si->locking_disabled_p = True;
si->nolock_reason = "error getting password";
}
-#endif /* NO_LOCKING */
- hack_uid (si);
+ /* 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"))
+ {
+ si->locking_disabled_p = True;
+ si->nolock_reason = "running under GDM";
+ }
+
+ /* 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
+
+ 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);
+
+ if (macos_p)
+ {
+ si->locking_disabled_p = True;
+ si->nolock_reason = "Cannot lock securely on MacOS X";
+ }
+ }
+
+#endif /* NO_LOCKING */
}
{
Widget toplevel_shell;
+#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 */
+
XSetErrorHandler (saver_ehandler);
XtAppSetErrorMsgHandler (si->app, startup_ehandler);
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_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);
if (p->verbose_p)
fprintf (stderr,
- "%s %s, copyright (c) 1991-1999 "
+ "%s %s, copyright (c) 1991-2003 "
"by Jamie Zawinski <jwz@jwz.org>.\n",
progname, si->version);
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 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 (p->lock_p && si->locking_disabled_p)
+ if (si->locking_disabled_p)
{
p->lock_p = False;
fprintf (stderr, "%s: locking is disabled (%s).\n", blurb(),
"\t See the manual for details.\n",
blurb());
}
+
}
/* Examine all of the display's screens, and populate the `saver_screen_info'
- structures.
+ structures. Make sure this is called after hack_environment() sets $PATH.
*/
static void
initialize_per_screen_info (saver_info *si, Widget toplevel_shell)
saver_screen_info *ssi = &si->screens[i];
ssi->global = si;
ssi->screen = ScreenOfDisplay (si->dpy, i);
+ ssi->number = i;
/* Note: we can't use the resource ".visual" because Xt is SO FUCKED. */
ssi->default_visual =
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;
}
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 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);
}
}
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)
{
fprintf (stderr, "%s: demoing %d at %s.\n", blurb(),
si->selection_mode, timestring());
else
- if (p->verbose_p)
- fprintf (stderr, "%s: blanking screen at %s.\n", blurb(),
- timestring());
+ 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.
+ */
+ continue;
+ }
+
if (! blank_screen (si))
{
/* We were unable to grab either the keyboard or mouse.
#ifndef NO_LOCKING
+ /* Maybe start locking the screen.
+ */
{
Time lock_timeout = p->lock_timeout;
p->lock_p && /* and locking is enabled */
!si->locking_disabled_p && /* and locking is possible */
lock_timeout == 0) /* and locking is not timer-deferred */
- si->locked_p = True; /* then lock right now. */
+ 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
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
+ /* Maybe unlock the screen.
+ */
if (si->locked_p)
{
saver_screen_info *ssi = si->default_screen;
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 */
kill_screenhack (si);
unblank_screen (si);
- si->locked_p = False;
+ set_locked_p (si, False);
si->emergency_lock_p = False;
si->demoing_p = 0;
si->selection_mode = 0;
si->lock_id = 0;
}
- if (p->verbose_p)
- fprintf (stderr, "%s: awaiting idleness.\n", blurb());
+ /* It's possible that a race condition could have led to the saver
+ window being unexpectedly still mapped. This can happen like so:
+
+ - screen is blanked
+ - hack is launched
+ - that hack tries to grab a screen image( it does this by
+ first unmapping the saver window, then remapping it.)
+ - hack unmaps window
+ - hack waits
+ - user becomes active
+ - hack re-maps window (*)
+ - driver kills subprocess
+ - driver unmaps window (**)
+
+ The race is that (*) might have been sent to the server before
+ the client process was killed, but, due to scheduling randomness,
+ might not have been received by the server until after (**).
+ In other words, (*) and (**) might happen out of order, meaning
+ the driver will unmap the window, and then after that, the
+ recently-dead client will re-map it. This leaves the user
+ locked out (it looks like a desktop, but it's not!)
+
+ To avoid this: after un-blanking the screen, sleep for a second,
+ and then really make sure the window is unmapped.
+ */
+ {
+ int i;
+ XSync (si->dpy, False);
+ sleep (1);
+ for (i = 0; i < si->nscreens; i++)
+ {
+ saver_screen_info *ssi = &si->screens[i];
+ Window w = ssi->screensaver_window;
+ XWindowAttributes xgwa;
+ XGetWindowAttributes (si->dpy, w, &xgwa);
+ if (xgwa.map_state != IsUnmapped)
+ {
+ if (p->verbose_p)
+ fprintf (stderr,
+ "%s: %d: client race! emergency unmap 0x%lx.\n",
+ blurb(), i, (unsigned long) w);
+ XUnmapWindow (si->dpy, w);
+ }
+ }
+ XSync (si->dpy, False);
+ }
}
}
static void analyze_display (saver_info *si);
+static void fix_fds (void);
int
main (int argc, char **argv)
memset(si, 0, sizeof(*si));
global_si_kludge = si; /* I hate C so much... */
- srandom ((int) time ((time_t *) 0));
+ fix_fds();
+
+# undef ya_rand_init
+ ya_rand_init (0);
save_argv (argc, argv);
set_version_string (si, &argc, argv);
print_banner (si);
load_init_file (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 warnings now. */
exit (1);
lock_initialization (si, &argc, argv);
+ print_lock_failure_banner (si);
if (p->xsync_p) XSynchronize (si->dpy, True);
- blurb_timestamp_p = p->timestamp_p; /* kludge */
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);
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);
+}
+
+
\f
/* 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, "<<undefined atom 0x%04X>>", (unsigned int) atom);
+ return strdup (buf);
+ }
+}
+
+
static void
clientmessage_response (saver_info *si, Window w, Bool error,
const char *stderr_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);
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)
+{
+ char *str = XGetAtomName_safe (si->dpy, event->xclient.message_type);
+ Window w = event->xclient.window;
+ char wdesc[255];
+ int screen = 0;
+
+ *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");
+ break;
+ }
+
+ 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);
+}
+
Bool
handle_clientmessage (saver_info *si, XEvent *event, Bool until_idle_p)
{
/* Preferences might affect our handling of client messages. */
maybe_reload_init_file (si);
- 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",
- blurb(), (str ? str : "(null)"));
- if (str) XFree (str);
- return False;
- }
- if (event->xclient.format != 32)
+ if (event->xclient.message_type != XA_SCREENSAVER ||
+ event->xclient.format != 32)
{
- fprintf (stderr, "%s: ClientMessage of format %d received, not 32\n",
- blurb(), event->xclient.format);
+ bogus_clientmessage_warning (si, event);
return False;
}
return True;
}
}
- clientmessage_response(si, window, True,
- "ClientMessage DEACTIVATE received while inactive.",
- "not active.");
+ 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)
{
XSync (si->dpy, False);
}
- fflush (stdout);
- fflush (stderr);
- if (real_stdout) fflush (real_stdout);
- if (real_stderr) fflush (real_stderr);
- /* 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
clientmessage_response (si, window, True,
char *response = (until_idle_p
? "activating and locking."
: "locking.");
- si->locked_p = True;
- si->selection_mode = 0;
- si->demoing_p = False;
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 */
{
{
char buf [1024];
char *str;
- str = (type ? XGetAtomName(si->dpy, type) : 0);
+ str = XGetAtomName_safe (si->dpy, type);
if (str)
{
analyze_display (saver_info *si)
{
int i, j;
- static const char *exts[][2] = {
- { "SCREEN_SAVER", "SGI Screen-Saver" },
- { "SCREEN-SAVER", "SGI Screen-Saver" },
- { "MIT-SCREEN-SAVER", "MIT Screen-Saver" },
- { "XIDLE", "XIdle" },
- { "SGI-VIDEO-CONTROL", "SGI Video-Control" },
- { "READDISPLAY", "SGI Read-Display" },
- { "MIT-SHM", "Shared Memory" },
- { "DOUBLE-BUFFER", "Double-Buffering" },
- { "DPMS", "Power Management" },
- { "GLX", "GLX" },
- { "XFree86-VidModeExtension", "XF86 Video-Mode" }
+ 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",
+ True
+ }, { "Apple-DRI", "Apple-DRI (XDarwin)",
+ True
+ },
};
- fprintf (stderr, "%s: running on display \"%s\"\n", blurb(),
- DisplayString(si->dpy));
- fprintf (stderr, "%s: vendor is %s, %d\n", blurb(),
+ fprintf (stderr, "%s: running on display \"%s\" (%d screen%s).\n",
+ blurb(),
+ DisplayString(si->dpy),
+ si->nscreens, (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;
- if (XQueryExtension (si->dpy, exts[i][0], &op, &event, &error))
- fprintf (stderr, "%s: %s\n", blurb(), exts[i][1]);
+ 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)
+ {
+ int k = j + 18;
+ while (strlen (buf) < k) strcat (buf, " ");
+ strcat (buf, "<-- not supported at compile time!");
+ }
+ fprintf (stderr, "%s\n", buf);
}
for (i = 0; i < si->nscreens; i++)
for (j = 0; j < 32; j++)
if (colormapped_depths & (1 << j))
fprintf (stderr, " %d", j);
- fprintf (stderr, "\n");
+ fprintf (stderr, ".\n");
}
if (non_mapped_depths)
{
- fprintf (stderr, "%s: screen %d non-mapped depths:", blurb(), i);
+ fprintf (stderr, "%s: screen %d non-colormapped depths:",
+ blurb(), i);
for (j = 0; j < 32; j++)
if (non_mapped_depths & (1 << j))
fprintf (stderr, " %d", j);
- fprintf (stderr, "\n");
+ fprintf (stderr, ".\n");
}
}
}
}
return !not_on_console;
}
+
+
+/* Do a little bit of heap introspection...
+ */
+void
+check_for_leaks (const char *where)
+{
+#ifdef HAVE_SBRK
+ 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 */
+}