<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">xlockmore-5.00 as of 15 December 2000, the maintained version of xlock
Adapted from Patrick J. Naughton's original xlock

Primary site: ftp://ftp.tux.org/pub/tux/bagleyd/xlockmore
Secondary site: ftp://ftp.x.org/contrib/applications
Web page: http://www.tux.org/~bagleyd/xlockmore.html
Maintainer: David A. Bagley &lt;bagleyd@tux.org&gt;

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  in the body.
    choice                  brief description
    ------                  -----------------
    xlock-beta              Xlock beta and production announcements
    xlock-alpha             Xlock alpha ("daily") release announcements
    xlock                   Xlock/Xlockmore development discussion
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Please send all bug reports to bagleyd@tux.org .
Alpha versions may be available through web page or ftp site.
Adapted from Patrick J. Naughton's original xlock, with lots of help
 from others.

BUGS to fix and other stuff to do see docs/TODO.

5.00
  Just about all modes are now updated.  Numerous bug fixes added.
    Modes modified for safer allocating.  Part of fix to security flaw.
    xlock was broken by using up all the virtual memory.
    xlockdir may need more work.  Multiscreen fixes added.
    text3d, an unstable C++ mode, needs more work, for the calls to "new".
    Tom Schmidt &amp; Jouk Jansen caught numerous goofs.
  Assorted fixes when doing above like "discrete -mono", and lyapunov &amp;
    mandelbrot now sometimes draw from the right side.  tube, lyapunov, and
    mandelbrot now go through colormap changes forward and backward.
  XFreeColors bug fix in colors.c thanks to Ian Collier
    &lt;Ian.Collier@comlab.ox.ac.uk&gt;.
  Enhanced xlock/util.c for SunOS 4.1.X and others that needed the
    matherr() function defined.  Now handles acos() and asin() DOMAIN
    error messages. Thanks to Tom Schmidt &lt;tschmidt@micron.com&gt;.
  SunOS 4.1.3_U1 did not have CLOCKS_PER_SEC defined.  Thanks to Tom Schmidt
    &lt;tschmidt@micron.com&gt;.
  pentomino mode added by Stephen Montgomery-Smith
    &lt;stephen@math.missouri.edu&gt;... it includes a scalable 3d look.
    tetris mode now uses and older version of this scalable 3d look as well.
  fire, sballs, lament and atlantis updates by Eric Lassauge.
  SIA passwording for Tru64 help thanks to Octave Orgeron &lt;octave@sun.com&gt;.
  ImageMagick stuff added by Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;
    Setup to go only for VMS.
  SunC++ (Forte 6 U1) compatiblity changes.
  sball mode... new GL mode, converted by Eric Lassauge.
  euler2d new mode option, eulerpower Added optimizations, rotation
    of region to maximize screen fill, and new algorithm for solving
    diff equation makes it twice as fast thanks to Stephen
    Montgomery-Smith &lt;stephen@math.missouri.edu&gt;.
  bubble3d, invert release fix
  fire mode... new GL mode converted by Eric Lassauge
    &lt;lassauge@mail.dotcom.fr&gt;.  Also had a few other mods including a
    solitare and new l-* icons in pixmaps.  Tom Schmidt
    &lt;tschmidt@micron.com&gt; added a -size option similar to sproingies for fire.
  lint cleanups
  cartoon and raster image removed, bat and bounce modes modified to do
    some of what it used to but not all...
  e-sound can now be turned off thanks to Mark Davies
  life patterns more random
  VMS edits thanks to Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;.
  Dpms lib changes for configure for Solaris 8 and XFree86 4.0 (latter not
    tested).  Also added a new Solaris xpm.
  kaleid: new spiral and spots options thanks Robert Adam, II
    &lt;raii@comm.net&gt; (spiral looks best like:
    xlock -mode kaleid -spiral -alternate -size 20 -count 5  ).
  Configure update for Mesa thanks to Tom Schmidt &lt;tschmidt@micron.com&gt;.
  closedown patch thanks to Bernd 'Bing' Leibing
    &lt;bernd.leibing@rz.uni-ulm.de&gt;.
  vtlock patches Eric Lassauge &lt;lassauge@mail.dotcom.fr&gt;.
  Configure update for X11R6.4 and X11R6.5.1.
  Display error should be printed if SYSLOG defined thanks to Alexander
    Elgert &lt;elgert@rbg.informatik.tu-darmstadt.de&gt;.
  xlock -resources crash fixed on Solaris thanks to Alexander Elgert
    &lt;elgert@rbg.informatik.tu-darmstadt.de&gt;.
  coredump fix for GL modes cage, moebius, rubik, skewb, and stairs
    and Mesa3.1 thanks to Tom Schmidt &lt;tschmidt@micron.com&gt;.
  solitare.cc update for disable-interactive.
  xlock -resources crash fixed on Solaris thanks to Alexander Elgert
    &lt;elgert@rbg.informatik.tu-darmstadt.de&gt;.
  Security Focus found a security bug with display name passing "%d" as the
    display name.  Thanks to Jeremy Buhler &lt;jbuhler@cs.washington.edu&gt; for
    the xlockmore patch.
  Environment configuration (--disable-interactive) logic was corrected
    (default was ok but you had to --enable-interactive to disable) thanks
    to Tom Schmidt &lt;tschmidt@micron.com&gt;.
  Man page changes.

4.17
  euler2d, new mode thanks to Stephen Montgomery-Smith
    &lt;stephen@math.missouri.edu&gt; also some work was done by Tim Auckland
    &lt;Tim.Auckland@Procket.com&gt;.  See euler2d.tex for theory.
  XSync(dsp, True) should not be used in modes as it is hard to log in
    when input password characters are randomly dropped.
  tetris, you can now play with -trackmouse, row clearing fixed, bonus
    pieces.  Added a new look to pieces but must be compiled in with
    -DBM_PLAIN.
  Purify Uninitialized Memory Read found in euler2d, life, and swarm and
   a memory leak in juggle.  SunOS fix for xcl and juggle and gameless
   environment configuration (--disable-interactive) thanks to Tom Schmidt
   &lt;tschmidt@micron.com&gt;.
  bounce, bat, pacman, and braid should look better for password sized
    windows
  xcl, new mode control-line combat model race, conversion from xscreensaver
    thanks to its author Martin Berentsen &lt;berentsen@sent5.uni-duisburg.de&gt;.
  multi-byte character support for languages like Japanese.  Fixed for
    bomb.c, nose.c, dclock.c, xlock.c, resource.c, iostuff.c,
    xmlock.c, and xglock.c.  Also added new xmlock/XmLock-jp.ad.
    Thanks to Yokota Hiroshi &lt;yokota@netlab.is.tsukuba.ac.jp&gt;.
    Maintainer (David Bagley) is a little confused about gettext and
    settext stuff.
  swarm improvements thanks to Juan Heguiabehere &lt;juanh@wins.uva.nl&gt;.
    Now do not fly at 45 degree angles most of the time and longer trails
    with -size.  Noticed some drawing errors on some Sun displays with
    long trails, probably a Sun hardware problem.
  added BLANK_ONLY #define if you only want the blank mode.
  VMS patch for sound thanks to Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;.
  sco patch from Ronald Joe Record &lt;rr@sco.com&gt;.  Did not take the patches
    straight so there could be some problems still, but tried to address
    the issues.  (etc/play.sh, spline.cc sqr, t3d.c time inc, and sysv5
    build issues).
  configure should now find Mesa as opengl.  Worked before
    for me... but may work for others now too.
  Minor warnings removed various files.
  loop.c now loops can go clockwise too.  The program decides which set of
    rules to use. (Is handedness a requirement for life? (DNA for example
    has right-handed helices.))  Added some debugging for building rules
    easier, hexagonal life more fleshed out so RAND_RULES will work until
    about generation 540.
  ESound updates by Eric Lassauge &lt;lassauge@mail.dotcom.fr&gt;.
  juggle.c: fix bug which caused crashes on some machines, less flashy arms,
    real-time, -pattern random (a true pattern generator), figure moved down
    and scaled, bouncing, more random, one ball juggling should not come
    up, and Sun CC 5.0 errors/warnings removed thanks to Tim Auckland
    &lt;Tim.Auckland@Procket.com&gt;.
  HP problems identified for life.c and shape.c, no code changes since it
    seems to be a strange bug in the HP cc compiler when using both -O and
    -g flags (default).  HP CC warnings removed in solitare.cc, xlock.c,
    resource.c, dclock.c, decay.c, goop.c, ico.c, juggle.c, starfish.c,
    t3d.c, tetris.c, erase*.*.  Updated configure and README for compiling
    and linking through HP's cc.  Still some open problems.
  Some arbitrary sized arrays removed in xlock.c, resource.c, and mode.c,
    do not believe them to be security problems.
  HP_PASSWDETC - due to possible security problems this will no longer
    compile by default, pointed out by Theo de Raadt
    &lt;deraadt@cvs.openbsd.org&gt;.
  Sun CC 5.0 warnings changes cover all modes with options.
  skewb mode added as an unstable GL mode.  Its in development.  Not much
    yet... I just have the corners drawn so far and no real movement yet.
    Its like a Rubik's Cube but with diagonal cuts that cut through the
    the center of the cube on a skewed angle.
  Buffer overrun security fix does not allow root access directly but the
    encrypted password file may be found in memory.  This vulnerability was
    discovered by Brock Tellier with additional research by Anthony Osborne
    at the COVERT Labs of PGP Security, Inc.  Now allocate memory instead
    of an arbitrary limit on mode name length.
  run mode added, its a hack but it sort of works.  :)
    Also changed resource.c to make a special case for it.
    would be nice if password window worked too...
    Will probably crash and burn on multiscreens, random mode, etc.
    run like:
    xlock -mode run -geometrystring geometry -runprogram xclock
    xlock -mode run -geometrystring g -runprogram xlogo
    xlock -mode run -geometrystring none -runprogram xfishtank
    (May be having a little problem with the none option...)
    _NOT_ a good idea to recursively run xlock
    Not fond of the name of the mode or its option names... so if you
    have better names in mind ... tell me.
    Moved to unstable (due to VMS and -debug problems).
  ico.c most flashing removed.  FullRandom added and now rotates more
    randomly, rotates in the proper direction (looking at it from the top,
    I guess its wrong if you think it should be on a glass table and the
    view is underneath...) and changes when it hits the end of the screen.
    Linewidth and "points" added as well.
  rubik.c update for stickers and cube roundness variables now set in macro,
    keeping it in sync with skewb.c .
  xlock.c, swirl.c, color.c, logout.c, random.c updates to use less calls
    to ScreenCount or ScreenOfDisplay, looking into supporting Xinerama
    (keep each screen independent (see TODO)) and feel these calls would
    cause problems.
  XFree86 4.0 fixes for DPMS and XCloseDisplay thanks to Jeremy Buhler
    &lt;jbuhler@cs.washington.edu&gt;.  Call to XCloseDisplay was causing
    problems, removing it should not, right?  More fixes for DPMS, this time
    for NetBSD.  Thanks to &lt;hubert.feyrer@rz.uni-regensburg.de&gt;
  solitare.cc Solaris CC warnings removed and fixed shapes when in
    password window.
  xalock removed from distribution

4.16
  ico.c added double buffering to face drawings.  Run like -faces since the
    default is off (still kind of flashy and added late).  Also removed
    pyramid (drawing errors, count = 7) and plane (boring, count = 6) from
    showing up randomly.
  ant.c noticed triangular ants were wrong, reverted some of the code back
    to 4.14.  Also made ants with neighbors &gt; 6 more rare.
  if both esound and rplay are installed, rplay is configured by default.
  t3d.c converted from xscreensaver thanks to Jouk Jansen
    see t3d.c for notes on what is being worked on...
    Still needs to be scaled to window size.
  bomb.c update to get rid of warning and more 2038 compatible.
  juggle.c thanks to Tim Auckland &lt;Tim.Auckland@Procket.com&gt;.
    Added -pattern option to try out new patterns.  As a juggler myself I
    find this very useful.  Cleaned up some of the release code.
    Now works for patterns with 0's.  Beginnings of a pattern generator
    is in the works.  Maintainer made it a bit more random.
  loop mode 2 bugs fixed for -neighbors 6
    Minimum size increased for mono because of drawing errors
    Should now work for small geometries like 32x32
  image.c update... needs a fast redraw between displays or the original
    version looks better.  Changed image defaults.
  rotor.c changed defaults.  Should behave more like the Sun version.
  rubik.c 2 bugs fixed with one statement.  Now works for -hideshuffling
    when turning on non square sides and checks that it down not make 2
    consecutive 180 degree turns when scrambling.
  genlauncher (stuff to help me maintain this) updated.
  dclock.c updates so y2k sub mode will no longer appear in random mode
    thanks to Tom Schmidt.
  xglock font problem fixes
    esound implements Enlightenment Sound daemon
    vtproc patch (compares of unsigned to negative)
    thanks to Remi Cohen-Scali&lt;remi.cohenscali@pobox.com&gt;
  new make.com that does not mess up the new users VMS environment
    thanks to Jouk Jansen.
  solitare mode added from the book Object Oriented Programming by Timothy
    Budd.  Added stuff: Mouse interaction, resizing, no initial flashing,
    and now should release memory.
  Added a check for gtkfontsel.h fore configure since glock fails to build for
    me.
  Dynamic linking of modules.  See "Dynamic Linking" in README.
    Now works with xmkmf -a (or configure --enable-modules, Linux only) .
    GL still has colormap problems... do not have a clue.
    random mode fixed so it will not call blank, bomb, or itself by default.
    Problems with multi file (GL) modes, these are temporarily being excluded.
  VMS patches for C++.  Thanks to Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;.
  Various g++ Wall warnings removed.
  xmlock NUMPROCS to low thanks to James Hiller &lt;jhiller@crl.com&gt;.
  BAD_PAM ifdefs fixed thanks to Naomaru Itoi &lt;itoi@eecs.umich.edu&gt;.
  dclock HIV adjustment thanks to Kenneth Stailey &lt;kstailey@primark.com&gt;.
  life3d with -mono should look better.
  genlauncher update with new modes, added xglock to genluancher, modified
    text3d, and modified xglock (a lot).  (Still have a question with
    recent Gtk (at least with 1.2.6): when GtkFontSelection is configured
    the corresponding library is added to xglock's Makefile but it is
    useless with the recent Gtks. It certainly needs to be incorporated in
    the configure program.) Thanks to Eric Lassauge
    &lt;lassauge@mail.dotcom.fr&gt;.

4.15
  -install now works for tetris and kumppa using PseudoColor.
  configure updates to allow use of Sun C++ if g++ is present thanks to
    Tom Schmidt.
  configure updates for g++ not to give warnings or errors about old
    X11 include files thanks to Alexandre Oliva &lt;oliva@lsd.ic.unicamp.br&gt;.
  star mode: more enterprises and drawing bug on enterprise fixed
    (weirded out when at top or left edge on Solaris).
  general cleanup: xmkmf fixes, gcc warning in text3d.cc removed, and
    delinted
  NetBSD patch for xlock.h thanks to Hubert Feyrer
    &lt;hubert.feyrer@rz.uni-regensburg.de&gt;.
  dclock now has an led option
  bug mode now has triangular bugs.  Well, they are still square but the
    neighborhoods can now be 3 or 12.  Added some extra genes to make
    odd and even locations independent for neighborhoods of 3 (could not
    figure out neighborhood 9).
  ant mode fixing neighborhood 12 (no neighborhood 9 as well).
  #define BAD_PAM if your system (known to happen on a version of RedHat)
    has a bad version of PAM with shadow passwords thanks to Lincoln Stein
    &lt;lstein@cshl.org&gt;
  xlock.c FD_SET now add one to get rid of a EBADF (Bad-file-descriptor)
    error on VMS.  Not sure what the consequences are on UNIX... left alone
    there, thanks to Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;.
  flag -bitmap core dumps fixed.
  xpm modes: reinitializing just images and redrawing on a colormap
    change is not good enough... I found one needs to reinitialize all the
    variables to assure that the initial info is correct.  For instance, a
    refresh for life mode would come up with a new bitmap where size of the
    bitmap was all wrong.
  Allow for -1 for configuring a button so a button logout can be chosen
    (or not) by a user.  Still can be forced at compiletime.  Thanks to the
    Michael Stone (Debian maintainer for xlock) &lt;mstone@justice.loyola.edu&gt;.
  crystal fix for Solaris.  Lines needed to be drawn without xor or would
    have drawing errors.
  life shooters fixed up for -callahan and -andreen.  Gliders can come from
    6 directions.  Also fixed a deadly core dump or infinite loop where a
    shooter could write a cell out of bounds (in a small window like the
    password window) possibly even for standard life as well (though you
    would need a really small password window).
  life with -fullrandom includes callahan and andreen rules
  eyes on triangular and hexagonal ants, also fixed truchet for triangular
    and hexagonal (+sharpturn) ants.
  config.sub fixed for linux/arm, also a fix for when USE_XLOCKRC nor
    FALLBACK_XLOCKRC is defined.  Thanks to the Michael Stone (Debian
    maintainer for xlock) &lt;mstone@justice.loyola.edu&gt;.
  eyes grelb now has moving antennas too.  They are down when flying up and
    up when falling.
  text3d and bubble3d now protected from the pipe mode.  Using MesaGL a lot
    of flashing was observed with these modes after the pipe mode was run.
  tik_tak new mode from Jouk Jansen &lt;joukj@hrem.stm.tudelft.nl&gt;.
  galaxy authorship for work done fixed.
  life grelbs now have moving antennas.  Its subtle but it HAD to be done.
    One can still bring in images and change the default grelb screen.
  fullrandom now uses xbm half the time for image, maze, and puzzle.
  inline is left defined for C++ if using C++ and C for config.h.in and
    xlock.h.  Trips up new SparcWorks C++ 6.1.  Help from Danny Zerkel
    &lt;dzerkel@cas.org&gt;.
  invert C++ compile errors for gcc-2.95.1 fixed by Jeremy Buhler
    &lt;jbuhler@cs.washington.edu&gt;.
  removed numerous warnings generated by gcc-2.95.1 -Wall.  Added statement
    in README about using old X11 include files with g++-2.95.1  (you need
    -fpermissive).
  xlock.tcl update from Charles Vidal &lt;vidalc@club-internet.fr&gt;.
  bat mode now shows the colored mono images half the time in fullrandom
    thanks to Jouk Jansen.
  dclock HIV adjustment thanks to Kenneth Stailey &lt;kstailey@primark.com&gt;.
  xglock fixes for Gtk-1.2.3 thanks to Thomas Brupbacher &lt;brp@cerberus.ch&gt;.
  matrix.c from Jeremy Buhler &lt;jbuhler@cs.washington.edu&gt;.  Password window
   works much better along with other fixes, see comments in matrix.c .
  configure.tcl update with make, make install, and view in real time thanks
    to Charles Vidal &lt;vidalc@club-internet.fr&gt;.
  SUNWspro 6.1 i_twojet.h compilation may be fixed.
  imake patch (decay and unstable) thanks to
     &lt;Matthew_Clarke@mindlink.bc.ca&gt;.
  blank mode: logic was reversed for enablesaver thanks to Eirik Fuller
    &lt;eirik@netcom.com&gt;.
  Kerberos4 patch thanks to Mark Murray
  FreeBSD patch for disabling FPE (there have been a few requests for this),
    thanks to Thomas Gellekum &lt;tg@zabagek.ihf.rwth-aachen.de&gt;.

-------------------------------------------------------------------------------

Original author: Patrick J. Naughton
Site: ftp.x.org in /R5contrib

 Copyright (c) 1988-91 by Patrick J. Naughton.

 Permission to use, copy, modify, and distribute this software and its
 documentation for any purpose and without fee is hereby granted,
 provided that the above copyright notice appear in all copies and that
 both that copyright notice and this permission notice appear in
 supporting documentation.

 This file is provided AS IS with no warranties of any kind.  The author
 shall have no liability with respect to the infringement of copyrights,
 trade secrets or any patents by this file or any part thereof.  In no
 event will the author be liable for any lost revenue or profits or
 other special, indirect and consequential damages.

    ______________________________________________________________________
    Patrick J. Naughton				   email: naughton@sun.com
    Sun Microsystems Laboratories, Inc.		   voice: (415) 336 - 1080

Maintainer: David A. Bagley &lt;bagleyd@tux.org&gt;
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