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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



 NAME
      xlock - Locks the local X display until a password is entered.


 SYNOPSIS
      xlock [ -help ] [ -version ] [ -resources ] [ -display displayname ] [
      -visual visualname ] [ -name resourcename ] [ -mode modename ] [ -delay
      usecs ] [ -batchcount num ] [ -count num ] [ -cycles num ] [ -ncolors
      num ] [ -size num ] [ -saturation value ] [ -erasemode modename ] [
      -erasedelay usecs ] [ -/+allowaccess ] [ -vtlock modename ] [ -/+nolock
      ] [ -/+inwindow ] [ -/+inroot ] [ -/+remote ] [ -/+mono ] [ -
      /+allowroot ] [ -/+debug ] [ -/+description ] [ -/+echokeys ] [
      -echokey echokey ] [ -/+enablesaver ] [ -/+resetsaver ] [ -/+grabmouse
      ] [ -/+grabserver ] [ -/+install ] [ -/+mousemotion ] [ -/+sound ] [ -
      /+timeelapsed ] [ -/+usefirst ] [ -/+verbose ] [ -nice level ] [
      -lockdelay seconds ] [ -timeout seconds ] [ -font fontname ] [
      -planfont fontname ] [ -bg color ] [ -fg color ] [ -background color ]
      [ -foreground color ] [ -username string ] [ -password string ] [ -info
      string ] [ -validate string ] [ -invalid string ] [ -geometry geom ] [
      -icongeometry geom ] [ -glgeometry geom ] [ -/+wireframe ] [ -/+showfps
      ] [ -fpsfont fontname ] [ -/+fpstop ] [ -/+use3d ] [ -delta3d value ] [
      -none3d color ] [ -right3d color ] [ -left3d color ] [ -both3d color ]
      [ -program programname ] [ -messagesfile formatted-filename ] [
      -messagefile filename ] [ -message string ] [ -messagefont fontname ] [
      -bitmap filename ] [ -cpasswd crypted-password ] [ -forceLogout minutes
      ] [ -logoutButton minutes ] [ -logoutButtonLabel textstring ] [
      -logoutButtonHelp textstring ] [ -logoutFailedString textstring ] [ -
      /+dtsaver ] [ -modulepath path ] [ -locksound string ] [ -infosound
      string ] [ -validsound string ] [ -invalidsound string ] [ -startCmd
      string ] [ -endCmd string ] [ -pipepassCmd string ] [ -logoutCmd string
      ]


 DESCRIPTION
      xlock locks the X server till the user enters their password at the
      keyboard.  While xlock is running, all new server connections are
      refused.  The screen saver is disabled.  The mouse cursor is turned
      off.  The screen is blanked and a changing pattern is put on the
      screen.  If a key or a mouse button is pressed then the user is
      prompted for the password of the user who started xlock.

      If the correct password is typed, then the screen is unlocked and the
      X server is restored.  When typing the password Control-U and
      Control-H are active as kill and erase respectively.  To return to the
      locked screen, click in the small icon version of the changing
      pattern.

      In the lower part of the password screen a text is displayed.  This
      message is taken from the first file of the following that exists:
      $HOME/.xlocktext, $HOME/.plan, or $HOME/.signature.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      On systems which support new BSD style authentication, the password
      may be prefixed by an authentication style followed by a colon (i.e.
      "style:password").  See the login.conf(5) for more information on
      authentication styles.


 NOTE ON ETIQUETTE
      Xlock should not be used on public terminals when there is a high
      demand for them.

      If you find a public terminal that has been locked by another user and
      there are no other terminals available, and the terminal appears to
      have been left idle for a while (normally more than 15 minutes), it is
      fair to try to reset the session in some manner.


 OPTIONS
      -help
           Print options and a brief description to standard output.

      -version
           Print version number (if >= 4.00) to standard output.

      -resources
           Print default resource file to standard output.

      -display displayname
           The display option sets the X11 display to lock.  xlock locks all
           available screens on a given server, and restricts you to locking
           only a local server such as unix:0, localhost:0, or :0 unless you
           set the -remote option.

      -visual visualname
           visualname which is one of "StaticGray", "GrayScale",
           "StaticColor", "PseudoColor", "TrueColor", "DirectColor", or
           "default".  default used to set the screen's default visual (the
           visual of the root window).

      -name resourcename
           resourcename is used instead of XLock when looking for resources
           to configure xlock.

      -mode modename
           As of this writing there are over 90 display modes supported
           (plus one more for random selection of one of these).  anemone
           Shows wiggling tentacles.

      apollonian

      ant     Shows Langton's and Turk's generalized ants.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      ant3d   Shows 3D ants.

      apollonian
              Shows Apollonian circles.

      atlantis
              Shows moving sharks/whales/dolphin.  May not be available
              depending on how it was configured.

      atunnels
              Advance GL tunnels screensaver.  May not be available
              depending on how it was configured.

      ball    Shows bouncing balls.

      bat     Shows bouncing flying bats.

      biof    Shows 3D bioform.

      blot    Shows Rorschach's ink blot test.

      bouboule
              Shows Mimi's bouboule of moving stars.

      bounce  Shows bouncing footballs.

      braid   Shows random braids and knots.

      bubble  Shows popping bubbles.

      bubble3d
              Shows Richard Jones's GL bubbles.  May not be available
              depending on how it was configured.

      bug     Shows Palmiter's bug evolution and a garden of Eden.

      clock   Shows Packard's oclock.

      coral   Shows a coral reef.

      crystal Shows polygons in 2D plane groups.

      daisy   Shows a meadow of daisies.

      dclock  Shows a floating digital clock or message.

      deco    Shows art as ugly as sin.

      demon   Shows Griffeath's cellular automata.





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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      dilemma Shows Lloyd's Prisoner's Dilemma simulation.

      discrete
              Shows various discrete maps.

      dragon  Shows Deventer's Hexagonal Dragons Maze.

      drift   Shows cosmic drifting flame fractals.

      cage    Shows the Impossible Cage, an Escher-like GL scene.  May not
              be available depending on how it was configured.

      euler2d Shows a simulation of 2D incompressible inviscid fluid.

      eyes    Shows eyes following a bouncing grelb.

      fadeplot
              Shows a fading plot of sine squared.

      fiberlamp
              Shows a Fiber Optic Lamp.

      fire    Shows a 3D fire-like image.  May not be available depending on
              how it was configured.

      flag    Shows a waving flag image.  This may be text or a graphic
              image.  Default text is the hostname and operating system.

      flame   Shows cosmic flame fractals.

      flow    Shows dynamic strange attractors.

      forest  Shows binary trees of a fractal forest.

      fzort   Shows a metallic-looking fzort.

      galaxy  Shows crashing spiral galaxies.

      gears   Shows GL's gears.  May not be available depending on how it
              was configured.

      glplanet
              Animates texture mapped sphere (planet)

      goop    Shows goop from a lava lamp.

      grav    Shows orbiting planets.

      helix   Shows string art.





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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      hop     Shows real plane iterated fractals.

      hyper   Shows spinning n-dimensional hypercubes.

      ico     Shows a bouncing polyhedron.

      ifs     Shows a modified iterated function system.

      image   Shows randomly appearing logos.

      juggle  Shows a Juggler, juggling.

      julia   Shows the Julia set.

      kaleid  Shows Brewster's Kaleidoscope.

      kumppa  Shows kumppa.

      laser   Shows spinning lasers.

      life    Shows Conway's game of life.

      life1d  Shows Wolfram's game of 1D life.

      life3d  Shows Bays' game of 3D life.

      lightning
              Shows Keith's fractal lightning bolts.

      lisa    Shows animated lissajous loops.

      lissie  Shows lissajous worms.

      loop    Shows Langton's self-producing loops.

      mandelbrot
              Shows mandelbrot sets.

      marquee Shows text.

      matrix  Shows the matrix.

      maze    Shows a random maze and a depth first search solution.

      moebius Shows the Moebius Strip II, an Escher-like GL scene with ants.
              May not be available depending on how it was configured.

      molecule
              Draws molecules, based on coordinates from PDB (Protein Data
              Base) files.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      morph3d Shows GL morphing polyhedra.  May not be available depending
              on how it was configured.

      mountain
              Shows Papo's mountain range.

      munch   Shows munching squares.

      noof    Shows SGI Diatoms.

      nose    Shows a man with a big nose runs around spewing out text.

      pacman  Shows Pacman(tm).

      penrose Shows Penrose's quasiperiodic tilings.

      petal   Shows various GCD Flowers.

      petri   Shows a mold simultation in a petri dish

      pipes   Shows a self-building pipe system.  May not be available
              depending on how it was configured.

      polyominoes
              Shows attempts to place polyominoes into a rectangle.

      puzzle  Shows a puzzle being scrambled and then solved.

      pyro    Shows fireworks.

      qix     Shows spinning lines a la Qix(tm).

      roll    Shows a rolling ball.

      rotor   Shows Tom's Roto-Rooter.

      rubik   Shows an auto-solving Rubik's Cube.  May not be available
              depending on how it was configured.

      sballs  Shows balls spinning like crazy in GL.  May not be available
              depending on how it was configured.

      scooter Shows a journey through space tunnel and stars.

      shape   Shows stippled rectangles, ellipses, and triangles.

      sierpinski
              Shows a Sierpinski's triangle.

      sierpinski3d
              Shows a Sierpinski's gasket.



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      slip    Shows slipping blits.

      solitare
              Shows Klondike's game of solitare.

      space   Shows a journey into deep space.

      sphere  Shows a bunch of shaded spheres.

      spiral  Shows a helical locus of points.

      spline  Shows colorful moving splines.

      sproingies
              Shows Sproingies!  Nontoxic.  Safe for pets and small
              children.  May not be available depending on how it was
              configured.

      stairs  Shows Infinite Stairs, an Escher-like GL scene.  May not be
              available depending on how it was configured.

      star    Shows a star field with a twist.

      starfish
              Shows starfish.

      strange Shows strange attractors.

      superquadrics
              Shows 3D mathematical shapes.  May not be available depending
              on how it was configured.

      swarm   Shows a swarm of bees following a wasp.

      swirl   Shows animated swirling patterns.

      t3d     Shows a Flying Balls Clock Demo.

      tetris  Shows an autoplaying tetris game.

      text3d | text3d2
              Shows 3D moving texts.

      thornbird
              Shows an animated Bird in a Thorn Bush fractal map.

      tik_tak Shows rotating polygons.

      toneclock
              Shows Peter Schat's toneclock.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      triangle
              Shows a triangular mountain range.

      tube    Shows an animated tube.

      turtle  Shows turtle fractals.

      vines   Shows fractal-like vines.

      voters  Shows Dewdney's Voters.

      wator   Shows Dewdney's Water-Torus planet of fish and sharks.

      wire    Shows a random circuit with 2 electrons.

      world   Shows spinning Earths.

      worm    Shows wiggly worms.

      xjack   Shows Jack having one of those days.

      xcl     Shows a Control Line combat model race

      blank   Shows nothing but a black screen.  Does not show up in random
              mode.

      bomb    Shows a bomb and will autologout after a time.  Does not show
              up in random mode and may be available depending on how it was
              configured.

      random  Shows a random mode from above except blank (and bomb).


      -delay usecs
           The delay option sets the speed at which a mode will operate.  It
           simply sets the number of microseconds to delay between batches
           of animations.  In blank mode, it is important to set this to
           some small number of seconds, because the keyboard and mouse are
           only checked after each delay, so you cannot set the delay too
           high, but a delay of zero would needlessly consume cpu checking
           for mouse and keyboard input in a tight loop, since blank mode
           has no work to do.

      -count num
           The batchcount option sets number of things to do per batch to
           num .

           In anenome mode it is means nothing.

           In ant and ant3d modes this refers the number of ants.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           In apollonian mode it is the number of possible ways to imbed
           circles within a circle, all of integer curvature.

           In atlantis mode it is the number of sharks.

           In atunnels mode it is means nothing.

           In ball mode it is the number of balls.

           In bat mode it is the number of bats, could be less because of
           conflicts.

           In blot mode this refers to the number of pixels rendered in the
           same color.

           In bouboule mode it is the number of stars.

           In bounce mode it is the number of balls, could be less because
           of conflicts.

           In braid mode it is the upper bound number of strands.

           In bubble mode it is the number of bubbles.

           In bubble3d mode it is the number of bubbles.

           In bug mode it is the number of bugs, could be less because of
           conflicts.

           In cage mode it is means nothing.

           In clock mode it is the percentage of the screen, but less than
           100%.

           In coral mode it is the number of seeds.

           In crystal mode it is the number of polygons.

           In daisy mode it is the number flowers that make a meadow.

           In dclock mode it means nothing.

           In deco mode it is the depth.

           In demon mode this refers the number of colors.

           In dilemma mode this refers the number of initial defectors.

           In discrete mode it is the number of points.

           In drift mode it is the number of levels to recurse (larger =



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           more complex).

           In dragon mode it means nothing.

           In euler2d mode it is the number of segments.

           In eyes mode it is the number of eyes.

           In fadeplot mode it is the number of steps.

           In fiberlamp it is the number of fibers.

           In fire mode it is the number of fire particles (set it to 0 to
           have rain).

           In flag mode it means nothing.

           In flame mode it is the number of levels to recurse (larger =
           more complex).

           In flow mode it is the number of bees.

           In forest mode it is the number trees that make a forest.

           In fzort mode it means nothing.

           In galaxy mode it means the number of galaxies.

           In gears mode it is the number of degrees to rotate the set of
           gears by.

           In glplanet mode it is the number of hundredth degrees to roll
           the planet by.

           In goop mode it is the number of blobs per plane.

           In grav mode it is the number of planets.

           In helix mode it means nothing.

           In hop mode this refers to the number of pixels rendered in the
           same color.

           In hyper mode it the number of dimensions.

           In ico mode it is the ith platonic solid.

           In ifs mode it means nothing.

           In image mode it means it is the number of logos on screen at
           once.



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           In juggle mode it is time in milliseconds between a throw and the
           next catch.

           In julia mode it is the depth of recursion.

           In kaleid mode it is the number of pens.

           In kumppa mode it means nothing.

           In lament mode it means nothing.

           In laser mode it is the number lasers.

           In life and life3d modes it is the number of generations before a
           glider is introduced.

           In life1d mode it means nothing.

           In lisa mode it is the number of loops.

           In lissie mode it is the number of worms.

           In loop mode it is the number of flaws.

           In mandelbrot mode it is the order.

           In marquee mode it means nothing.

           In matrix mode it means nothing.

           In maze mode it means nothing.

           In moebius mode it is means nothing.

           In molecule mode it means nothing.

           In morph3d mode it is the ith platonic solid.

           In mountain mode it is the number of mountains.

           In munch mode it means nothing.

           In noof mode it means nothing.

           In nose mode it means nothing.

           In qix mode it is the number of points.

           In pacman mode it means the number of ghosts.

           In penrose mode it means nothing.



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           In petal mode it the greatest random number of petals.

           In petri mode it means nothing.

           In pipes mode it shows different joints, 0 random, 1 spherical, 2
           bolted elbow, 3 elbow, and 4 alternating.

           In polyominoes mode it means nothing.

           In puzzle mode it the number of moves.

           In pyro mode it is the maximum number flying rockets at one time.

           In roll mode it is the number of points.

           In rotor mode it is the number of rotor thingys which whirr...

           In rubik mode it is the number of moves.

           In sballs mode it is the number of spheres.

           In scooter mode it is the number of doors.

           In shape mode it means nothing.

           In sierpinski mode it is the number of points.

           In slip mode it means nothing.

           In solitare mode it means nothing.

           In space mode it is the number of stars.

           In sphere mode it means nothing.

           In spiral mode it is the number of spirals.

           In spline mode it is the number of points "splined".

           In sproingies mode it is the number of sproingies.

           In stairs mode it is means nothing.

           In star mode it is the number of stars on the screen at once.

           In starfish mode it means nothing.

           In strange mode it means nothing.

           In superquadrics mode its the number of horizontal and vertical
           lines in the superquadric.



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           In swirl mode it means the number of "knots".

           In swarm mode it is the number of bees.

           In t3d mode it means nothing.

           In tetris mode it means nothing.

           In text3d mode it means nothing.

           In thornbird mode it is the number of points.

           In triangular mode it is the number of mountains.

           In tube mode it is a rectangle (= 1), an ellipse (= 2), or a
           polygon if greater.

           In turtle mode it means nothing.

           In vines mode it is draw a complete vine (= 0) or a portion (=
           1).

           In voters mode it means the number of parties, 2 or 3.

           In wator mode it means the breed time for the fish.

           In wire mode it means the length of the circuit.

           In world mode it is the number of worlds.

           In worm mode it is the number of worms.

           In xcl mode it represents the number of planes.

           In xjack mode it means nothing.

           In blank mode it means nothing.

           In bomb mode it means the number of minutes to autologout.

           A negative count allows for randomness.  The range from the
           minimum allowed nonnegative count for a particular mode to the
           ABS( count ) (or maximum allowed count , whichever is less).

      -batchcount num
           The batchcount option is deprecated but should still work as
           count.

      -cycles num
           The cycles option sets the number of cycles until time out for
           ant, ant3d, apollonian, blot, braid, bug, clock, crystal, daisy,



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           deco, demon, dilemma, discrete, dragon, eyes, fiberlamp, flag,
           flow, forest, galaxy, helix, hop, hyper, ico, juggle, laser,
           life, life1d, life3d, lisa, lissie, loop, mandelbrot, mountain,
           petal, sierpinski, shape, spline +erase, t3d, thornbird,
           triangle, tube, voters, wator, and wire.  For euler2d and worm it
           is the length of the lines, for atlantis it is the shark speed,
           for fadeplot, julia and spiral it is the length of the trail of
           dots, munch it is the minimum size of the squares, for kaleid it
           is the % of black, for qix it is the number of lines, for spline
           -erase it means the number of splines * 64 (for compatibility
           with +erase), for gears it is the number of degrees to increment
           the spin of each gear by, for glplanet it is the number of
           hundredth degrees to rotate the planet by, for molecule it is the
           time in seconds until timeout, for pipes it is the number of
           systems to draw before clearing the screen, for rubik it is the
           number of steps to complete a 90 move, for sballs it is the
           sphere speed value, for scooter it is the speed, for
           superquadrics it is the number of frames it takes to morph from
           one shape to another.  for text3d it is the number of times
           drawing a word before the next one, For others it means nothing.

      -size num
           The size option sets the size maximum size of a star in bouboule,
           pyro and star, size of ball in ball and bounce, size of bat in
           bat, maximum size of bubble in bubble, size of clock in clock,
           minimum size of rectangles in deco, size of the polygons in
           crystal, tik_tak, and toneclock, size of polyhedron in ico, size
           of lissie in lissie, size of dots of flag, for kaleid it is the
           symmetry, width of maze hallway, size of side of penrose tile,
           radius of loop in lisa, radius of ball in roll, number of corners
           in sierpinski, number of stars in scooter, size of tube in tube,
           width of worm in worm, line width in rotor, size of cells in ant,
           bug, dilemma, dragon, life, life1d, pacman, petri, tetris,
           voters, wator, and wire.  In pipes it is the maximum length of a
           system.  In flow and swarm it is the length of the lines.  In
           atlantis it is the shark size.  A negative number allows for
           randomness, similar to count. In atunnels, fire, gears, sballs
           and sproingies it is the size of the screen (default 400), this
           is because on many slow systems it runs too slow when the picture
           covers the full screen.  Set to 0 for full screen on fast
           machines.

      -ncolors num
           The ncolors option sets the maximum number of colors to be used.

      -saturation value
           The saturation option sets saturation of the color ramp used to
           value . 0 is grayscale and 1 is very rich color.  0.4 is a nice
           pastel.





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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -erasemode modename
           As of this writing there are over 12 erase modes supported (if
           its not chosen its assumed random).  The erase modes are
           random_lines, random_squares, venetian, triple_wipe, quad_wipe,
           circle_wipe, three_circle_wipe, squaretate, fizzle, spiral,
           slide_lines, losira, no_fade.  modename is now similar to the
           option modelist where you can it can be something like "all-
           losira" to get all erasemodes but losira.  Use a "+" or a "," to
           add modes like "spiral+venetian".

      -erasedelay usecs
           The erasedelay option sets the number of microseconds for steps
           of the erasemode (a setting of 0 and the erasemode is bypassed).

      +/-nolock
           The nolock option causes xlock to only draw the patterns and not
           lock the display.  A key press or a mouse click will terminate
           the screen saver.

      -/+inwindow
           Runs xlock in a window, so that you can iconify, move, or resize
           it and still use your screen for other stuff.  When running in a
           window, xlock no longer locks your screen, it just looks good.

      -/+inroot
           Runs xlock in your root window.  Like the inwindow option it no
           longer locks the screen, it just looks good.

      -/+remote
           The remote option tells xlock to not stop you from locking remote
           X11 servers.  This option should be used with care and is
           intended mainly to lock X11 terminals which cannot run xlock
           locally.  If you lock someone else's workstation, they will have
           to know your password to unlock it.  Using +remote overrides any
           resource derived values for remote and prevents xlock from being
           used to lock other X11 servers.  (Use `+' instead of `-' to
           override resources for other options that can take the `+'
           modifier similarly.)

      -/+mono
           The mono option causes xlock to display monochrome, (black and
           white) pixels rather than the default colored ones on color
           displays.

      -/+allowaccess
           This option is required for servers which do not allow clients to
           modify the host access control list.  It is also useful if you
           need to run x clients on a server which is locked for some
           reason...  When allowaccess is true, the X11 server is left open
           for clients to attach and thus lowers the inherent security of
           this lock screen.  A side effect of using this option is that if



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                                7 March 2006



           xlock is killed -KILL, the access control list is not lost.

      -vtlock modename
           This option is used on a XFree86 system to manage VT switching in
           [off|noswitch|switch|restore] mode.

      off       means no VT switch locking.

      switch    means VT switch locking + switching to xlock VT when
                activated.

      restore   means VT switch locking + switching to xlock VT when
                activated + switching back to previous VT when desactivated.

      noswitch  means VT switch locking only when xlock VT is active.

      -/+allowroot
           The allowroot option allows the root password to unlock the
           server as well as the user who started xlock.  May not be able to
           turn this on and off depending on your system and how xlock was
           configured.

      -/+debug
           Allows xlock to be debugged by doing all but locking the screen.

      -/+description
           The description option causes xlock shows a mode description
           above password window.  The default is to show this description.

      -/+echokeys
           The echokeys option causes xlock to echo '?' characters (default)
           for each key typed into the password prompt.  Some consider this
           a security risk, so the default is to not echo anything.

      -echokey echokey
           The text character to use for echo key in echokeys .

      -/+enablesaver
           By default xlock will disable the normal X server's screen saver
           since it is in effect a replacement for it.  Since it is possible
           to set delay parameters long enough to cause phosphor burn on
           some displays, this option will turn back on the default screen
           saver which is very careful to keep most of the screen black.

      -/+resetsaver
           By default xlock will call XResetScreenSaver.  This may be
           undesirable with DPMS monitors.

      -/+grabmouse
           The grabmouse option causes xlock to grab the mouse and keyboard,
           this is the default.  xlock can not lock the screen without this.



                                   - 16 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+grabserver
           The grabserver option causes xlock to grab the server.  This is
           not usually needed but some unsecure X servers can be defeated
           without this.

      -/+install
           Allows xlock to install its own colormap if xlock runs out of
           colors.  May not work on with some window managers (fvwm) and
           does not work with the -inroot option.

      -/+mousemotion
           Allows you to turn on and off the sensitivity to the mouse to
           bring up the password window.

      -/+sound
           Allows you to turn on and off sound if installed with the
           capability.

      -/+timeelapsed
           Allows you to find out how long a machine is locked so you can
           complain to an administrator that someone is hogging a machine.

      -/+usefirst
           The usefirst option causes xlock to use the keystroke which got
           you to the password screen as the first character in the
           password.  The default is to ignore the first key pressed.

      -/+verbose
           Verbose mode, tells what options it is going to use.

      -nice nicelevel
           The nice option sets system nicelevel of the xlock process to
           nicelevel .

      -lockdelay seconds
           The lockdelay option sets the number of seconds before the screen
           needs a password to be unlocked.  Good for use with an
           autolocking mechanism like xautolock(1).

      -timeout seconds
           The timeout option sets the number of seconds before the password
           screen will time out.

      -font fontname
           The font option sets the font to be used on the prompt screen.

      -planfont fontname
           option sets the font to be used for the text that is displayed in
           the lower part of the password screen.





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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -fg color
           The fg option sets the color of the text on the password screen
           to color .

      -bg color
           The bg option sets the color of the background on the password
           screen to color .

      -foreground color
           The foreground option sets the color of the text on the password
           screen to color .

      -background color
           The background option sets the color of the background on the
           password screen to color .

      -username string
           Text string is shown in front of user name, defaults to "Name: ".

      -password string
           Text string is the password prompt string, defaults to "Password:
           ".

      -info string
           Text string is an informational message to tell the user what to
           do, defaults to "Enter password to unlock; select icon to lock.".

      -validate string
           Text string is a message shown while validating the password,
           defaults to "Validating login..."

      -invalid string
           Text string is a message shown when password is invalid, defaults
           to "Invalid login."

      -geometry geom
           The geometry option sets geom the size and offset of the lock
           window (normally the entire screen).  The entire screen format is
           still used for entering the password.  The purpose is to see the
           screen even though it is locked.  This should be used with
           caution since many of the modes will fail if the windows are far
           from square or are too small (size must be greater than 0x0).
           This should also be used with -enablesaver to protect screen from
           phosphor burn.

      -icongeometry geom
           The icongeometry option sets geom the size of the iconic screen
           (normally 64x64) seen when entering the password.  This should be
           used with caution since many of the modes will fail if the
           windows are far from square or are too small (size must be
           greater than 0x0).  The greatest size is 256x256.  There should



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                                7 March 2006



           be some limit so users could see who has locked the screen.
           Position information of icon is ignored.

      -glgeometry geom
           The glgeometry option sets geom the size of the screen for gl
           modes.  Not normally available or needed.

      -/+wireframe
           Turn on/off wireframe, available on ant3d, atlantis, atunnels,
           daisy, fire, gears, lament, life3d, mountain, sballs, sproingies,
           superquadrics, and triangle.

      -/+showfps
           Turn on/off frame per sec display, available on atlantis,
           atunnels, bubble3d, cage, fire, gears, invert, lament, moebius,
           morph3d, rubik, sballs, stairs, and superquadrics.

      -/+fpstop
           Turn on/off frame per sec display on top of screen, used if
           showfps is on.

      -fpsfont fontname
           The fpsfont option sets the font to be used in the frame per sec
           display, used if showfps is on.

      -/+use3d
           Turn on/off 3d view, available on bouboule, pyro, star, and worm.

      -delta3d value
           Space between the center of your 2 eyes for 3d mode.

      -none3d color
           Color used for empty size in 3d mode.

      -right3d color
           Color used for right eye in 3d mode.

      -left3d color
           Color used for left eye in 3d mode.

      -both3d color
           Color used for overlapping images for left and right eye in 3d
           mode.

      -program programname
           The program option sets the program to be used as the fortune
           generator.  Currently used only for marquee and nose modes.

      -messagesfile formatted-filename
           The messagesfile option sets the file to be used as the fortune
           generator.  The first entry is the number of fortunes, the next



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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           line contains the first fortune.  Fortunes begin with a "%%" on a
           line by itself.  Currently used only for marquee and nose modes.
           If one exists, it takes precedence over the fortune program.

      -messagefile filename
           The messagefile option sets the file whose contents are
           displayed.  Currently used only for marquee and nose modes.  If
           one exists, it takes precedence over the fortune program and
           messagesfile.

      -message textstring
           The message option sets the text to be displayed in a mode.
           Currently used only for flag, marquee and nose modes.  If one
           exists, it takes precedence over the fortune program,
           messagesfile and message.

      -messagefont fontname
           The messagefont option sets the font to be used in the mode.
           Currently used only for flag, marquee, and nose modes.

      -bitmap filename
           The bitmap option sets the xbm, xpm, or ras file to be displayed
           with flag, image, life, life1d, maze, or puzzle mode.  For eyes
           and pacman only a xbm file is accepted.  Certain modes reject the
           bitmap if too big.  /


 MORE OPTIONS (these may not be available)
      -cpasswd crypted-password
           The cpasswd option sets the key to be this text string to unlock
           xlock instead of password file.

      -forceLogout minutes
           The forceLogout option sets minutes to auto-logout.

      -logoutButton minutes
           The logoutButton option sets minutes to logoutButton is available
           on password screen.

      -logoutButtonLabel string
           Text string is a message shown inside logout button when logout
           button is displayed.  Defaults to "Logout".

      -logoutButtonHelp string
           Text string is a message shown outside logout button when logout
           button is displayed.  Defaults to "Click the \"Logout\" button to
           log out current\n user and make workstation available."

      -logoutFailedString string
           Text string is a message shown when a logout is attempted and
           fails.  Defaults to "Logout attempt FAILED.\n Current user could



                                   - 20 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           not be automatically logged out."

      -/+dtsaver
           Turn on/off CDE Saver Mode.  This option is only available if CDE
           support was compiled in.

      -modulepath path
           The modulepath option sets the directories that xlock searches
           for mode modules to load.  It is a colon separated list of
           directories to search. If "%S" is included in the path, it is
           replaced by the default modulepath.  To add a private module
           directory to the default path, use something like
           '%S:~/mymoduledir' as the path.  This option is only available if
           module support was compiled in.

      -locksound string
           Text string references sound to use at lock time.  Default sound,
           male voice: "Thank you, for your cooperation."

      -infosound string
           Text string references sound to use for information.  Default
           sound, male voice: "Identify please."

      -validsound string
           Text string references sound to when a password is valid.
           Default sound, female voice: "Complete."

      -invalidsound string
           Text string references sound to when a password is invalid.
           Default sound, female voice: "I am not programmed to give you
           that information."

      -startCmd string
           Text string command to execute when the screen is locked.
           Commonly used instructions include: "zaway". This command, if
           still running when the screensaver exits, will be killed.

      -endCmd string
           Text string command to execute when the screen is unlocked.

      -pipepassCmd string
           Text string command into which to pipe the password when the
           screen is unlocked.

      -logoutCmd string
           Text string command to execute when the program logs the user out
           (either via the autologout or by pressing the logout button).

      -mailCmd string
           Text string command to execute when the program to check mail.




                                   - 21 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -mailIcon string
           Text string of file for the "mail arrived" bitmap.

      -nomailIcon string
           Text string of file for the "no mail" bitmap.

      -dpmsstandby  seconds
           Allows one to set DPMS Standby for monitor (0 is defined as
           infinite).  (Horizontal sync on, Vertical sync off, RGB guns off,
           power supply on, tube filaments energized, (screen saver mode).
           Typical 17 inch screen...  110 out of 120 watts with a 3 sec
           recovery time.)  This option is only available if DPMS support
           was compiled in.

      -dpmssuspend  seconds
           Allows one to set DPMS Suspend for monitor (0 is defined as
           infinite).  (Horizontal sync off, Vertical sync on, RGB guns off,
           power supply off, tube filaments energized.  Typical 17 inch
           screen ...  15 out of 120 watts with a 3 sec recovery time.)
           This option is only available if DPMS support was compiled in.

      -dpmsoff  seconds
           Allows one to set DPMS Power Off for monitor (0 is defined as
           infinite).  (Horizontal sync off, Vertical sync off, Small
           auxiliary circuit stays on to monitor the HS/VS signals to enable
           power on when data needs to be displayed on the screen.  Typical
           17 inch screen ...  5 out of 120 watts with a 10 sec recovery
           time.)  This option is only available if DPMS support was
           compiled in.


 SPECIAL MODE DEPENDENT OPTIONS
      -neighbors num
           The neighbors option sets the number of neighbors of a cell to 3,
           4, 6, 9 (may not have real mathematical meaning), or 12 for
           several automata modes (ant, bug, demon, dilemma, life, loop, and
           wire) (bug and loop do not span this full range).  Setting it to
           0 typically randomizes this, except where bitmaps are used
           (dilemma, life, voters, and wator).

      -/+eyes
           Turn on and off eyes for ant, ant3d, and bug.

      -/+cycle
           Turn on and off colour cycling in crystal, lyapunov, mandelbrot,
           starfish, swirl, tetris, and tube.

      -/+label
           Turn on and off alternate space and number labeling in
           apollonian. For ant and ant3d this turns on and off the labeling
           of the rule.  For life and life3d this turns on and off the



                                   - 22 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



           labeling of the pattern name and rule.

      -/+serial
           Turn on and off sequential allocation of colors in kaleid. For
           life and life3d this turns on and off the picking of sequential
           patterns (to be used with middle button of the mouse).

      -/+trackmouse
           Turn on and off mouse interaction in eyes, fire, julia, solitare,
           sballs, swarm, and tetris. For maze, pacman, solitare and tetris
           this may not be available depending on how xlock was configured.

      -/+texture
           Turn on and off texturing in fire, lament and sballs. This may
           not be available depending on how xlock was configured.

      -rule <rule>
           The rule string is defined as S<neighborhood>/B<neighborhood> for
           life and life3d. Special parameters: P, picks a random rule from
           all rules that have known patterns; G, picks a random rule from
           all rules that have known gliders.  For life a good example is
           Conway's rule which is S23/B3.  Others are B36/S23 and
           B3678/S34678.  For life3d good examples are Bay's rules which are
           S45/B5, S567/B6, S56/B5, and S67/B67.  The rule string is defined
           as a binary string (requires at least one 1 and one 0) for ant
           and a base 4 (or quadranary) string (requires 3 of 4 digits to be
           represented) for ant3d. Here a special parameter, T and then a
           number, will pick a specific table.

      -lifefile filename
           The lifefile option sets the life and life3d lifeform.  Only one
           format is currently supported, similar to the #P xlife format.
           For life3d, 2 linefeeds in a row are assumed to advance the
           depth.

      -arms num
           Allows one to set the number of arms in anemone.

      -finpoints num
           Allows one to set the width of the arms in anemone.

      -width num
           Allows one to set the final number of points in each array of
           anemone.

      -withdraws num
           Allows one to set the withdraw frequency in

      anemone.
           -turnspeed num Allows one to set the turning speed in




                                   - 23 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+truchet
           Turn on and off Truchet lines (trail) in ant.

      -/+altgeom
           Turn on and off alternate geometries (off euclidean space, on
           includes spherical and hyperbolic) in apollonian mode.

      -whalespeed num
           Allows one to set the speed of the whales and dolphin in
           atlantis.

      -/+boil
           Turn on and off having the bubbles bubble up in bubble.

      -nx num
           Allows one to set the number of unit cells in x-direction in
           crystal.

      -ny num
           Allows one to set the number of unit cells in y-direction in
           crystal.

      -/+centre
           Turn on and off the centering on screen in crystal.

      -/+maxsize
           Turn on and off the centering on screen in crystal.

      -/+cell
           Turn on and off the drawing of unit cell in crystal.

      -/+grid
           Turn on and off the drwing of grid of unit cells (if -cell is on)
           in crystal.

      -/+garden
           Turn off and on garden look in daisy.

      -/+binary
           Turn on and off the binary clock in dclock.

      -/+led
           Turn on and off the led clock in dclock.

      -/+popex
           Turn on and off the population explosion counter in dclock.

      -/+forest
           Turn on and off the tropical deforest (hectares/acres) counter in
           dclock.




                                   - 24 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+hiv
           Turn on and off the HIV infection counter in dclock.

      -/+lab
           Turn on and off the Animal Research counter in dclock.

      -/+veg
           Turn on and off the Animal Consumation counter in dclock.

      -/+y2k
           Turn on and off the Year 2000 countdown in dclock.

      -/+millennium
           Turn on and off the Second Millennium (January 1, 2001) countdown
           in dclock.

      -bonus value
           Allows one to set the bonus for cheating... between 1.0 and 4.0
           in dilemma.

      -/+conscious
           Turn off and on self-awareness in dilemma.

      -/+grow
           Turn on and off growing fractals (else they are animated) for
           drift.

      -/+liss
           Turn on and off using lissajous figures to get points for drift.

      -/+fog
           Turn on and off fog for fire.

      -/+shadows
           Turn on and off shadows for fire.

      -trees num
           Validate the displaying of trees for fire if greater than zero.

      -/+invert
           Turn on and off inverting of the flag.

      -/+rotate
           Turn on/off rotating around attractor in flow.

      -/+ride
           Turn on/off rideing in the flow.

      -/+box
           Turn on/off bounding box in flow.




                                   - 25 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+periodic
           Turn on/off periodic attractors in flow.

      -/+search
           Turn on/off search for new attractors in flow.

      -/+dbuf
           Turn on/off double buffering in flow.

      -/+tracks
           Turn on and off star tracks in galaxy.

      -/+light
           Turn on and off lighting of the planet for glplanet.

      -/+bounce
           Turn on and off bouncing movement of the planet for glplanet.

      -pimage filename
           Use the named xbm or xpm file for texturing the planet for
           glplanet. Use BUILTIN as filename for the builtin image taken
           from Xearth.

      -/+roll
           Turn on and off rolling of the planet for glplanet.

      -/+rotate
           Turn on and off rotation of the planet for glplanet.

      -/+texture
           Turn on and off texturing of the planet for glplanet.

      -/+stars
           Turn on and off showing stars in the background for glplanet.

      -/+decay
           Turn on and off decaying orbits for grav.

      -/+trail
           Turn on and off decaying trail of dots for grav.

      -/+ellipse
           Turn on and off ellipse format in helix.

      -/+martin
           Turn on and off Barry Martin's square root hop. -/+popcorn Turn
           on and off Clifford A. Pickover's popcorn hop.

      -/+ejk1...ejk6
           Turn on and off Ed J. Kubaitis' hops.




                                   - 26 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+rr
           Turn on and off Renaldo Recuerdo's hop.

      -/+jong
           Turn on and off Jong's hop.

      -/+sine
           Turn on and off Barry Martin's sine hop.

      -pattern <pattern>
           Allows one to set the pattern for juggle.

      -tail num
           Minimum Trail Length for juggle.

      -/+real
           Turn on/off real-time juggling for juggle. Deprecated. There
           should be no need to turn off real-time juggling, even on slow
           systems.  Adjust speed using -count.

      -/+describe
           Turn on/off pattern descriptions in juggle.

      -/+balls
           Turn on/off Balls in juggle.

      -/+clubs
           Turn on/off Clubs in juggle.

      -/+torches
           Turn on/off Flaming Torches in juggle.

      -/+knives
           Turn on/off Knives in juggle.

      -/+rings
           Turn on/off Rings in juggle.

      -/+bballs
           Turn on/off Bowling Balls in juggle.

      -/+planetary
           Turn on and off planetary gears in gears.

      -planetsize num
           Sets the size of the screen for planetary option in gears. This
           is for machines with slower CPU. (Set to 0 for full screen).

      -/+disconnected
           Turn on and off disconnected pen movement in kaleid.




                                   - 27 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+alternate
           Turn on and off alternate rotated display mode kaleid.

      -/+quad
           Turn on and off quad mirrored/rotated mode similar to size 4 in
           kaleid.

      -/+oct
           Turn on and off oct mirrored/rotated mode similar to size 8 in
           kaleid.

      -/+linear
           Turn on and off Cartesian/Polar coordinate mode in kaleid.

      -/+conway
           Turn on and off John Conway's original Life rule S23/B3 life.

      -/+highlife
           Turn on and off David Bell's HighLife rule S23/B36 life.

      -/+daynight
           Turn on and off Nathan Thompson's Day and Night rule S34678/B3678
           life.

      -/+callahan
           Turn on and off Paul Callahan's S2b34/B2a hexagonal life.

      -/+andreen
           Turn on and off Bob Andreen's S2a2b4a/B2a3a4b hexagonal life.

      -/+trilife
           Turn on and off Carter Bays' S34/B45 triangular life.

      -/+trilife1
           Turn on and off Carter Bays' S45/B456 triangular life.

      -/+trilife2
           Turn on and off Carter Bays' S23/B45 triangular life.

      -/+totalistic
           Turn on and off totalistic rules for life1d. If this is off then
           it follows rules of the LCAU collection.  These rules may not be
           symmetric and are more general.

      -/+additive
           Turn on and off additive functions mode in lisa.

      -/+dissolve
           Turn on and off disolving state in loop.





                                   - 28 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+evolve
           Turn on and off Evolving Loops in loop.

      -/+langton
           Turn on and off Langton Loops for loop.

      -/+sheath
           Turn on and off sheath extension for loop.

      -/+wrap
           Turn on and off wrapping of borders for loop.

      -increment num
           Sets the option for increasing orders in mandelbrot.

      -/+alpha
           Turn on and off interior displaying level of closest return in
           mandelbrot.

      -/+binary
           Turn on and off binary decomposition color modulation in
           mandelbrot.

      -/+dem
           Turn on and off Distance Estimator Method (instead of escape
           time) in mandelbrot.

      -/+index
           Turn on and off interior displaying iteration of closest return
           in mandelbrot.

      -/+lyap
           Turn on and off interior displaying according to an estimate of
           the Lyapunov exponent in mandelbrot.

      -/+pow
           Turn on and off adding z^z in mandelbrot.

      -/+sin
           Turn on and off adding sin(z) in mandelbrot.

      -/+noants
           Turn off and on ants in moebius.

      -/+solidmoebius
           Turn on and off solid Mobius strip in moebius.

      -/+atoms
           Turn on and off the drawing of spheres for the atoms in molecule.





                                   - 29 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -/+bbox
           Turn on and off showing the molecules in a blue box in molecule.

      -/+bonds
           Turn on and off the drawing of the atomic bonds in molecule.

      -molecule filename
           Read a molecule structure from a pdb file in molecule.

      -/+labels
           Turn on and off the labeling of the atoms in molecule.

      -spin{x|y|z}
           Set the axis for molecule rotation in molecule. The default is
           "XYZ".

      +spin
           Turn off the molecule rotation in molecule.

      -/+titles
           Turn on and off the molecule description in molecule.

      -/+wander
           Turn on and off the moving of the molecule on a sinoid curve in
           molecule. Turn on and off movements in fire.

      -/+ammann
           Turn on and off lines for penrose.

      -increment value
           Allows fine adjustments to order in mandelbrot.

      -/+erase
           Turn on and off erasing for spline. If this option is on, cycles
           is divided by 64 to compute the number of lines, so as to be
           compatible when using -fullrandom.

      -factory num
           Number of extra factory parts in pipes.

      -/+fisheye
           Turn on if you want a zoomed-in view of pipes.

      -/+tightturns
           Turn on if you want the pipes to bend more often.

      -/+rotatepipes
           Turn on if you want the pipe system rotated in pipes.

      -/+complete
           Turn on or off complete graph morphing in qix.



                                   - 30 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -size[xyz] num
           Number represents the number of cubies on the x, y, or z axis.
           Negative numbers offer randomness from 2 to the absolute value of
           the number.  star.

      -/+hideshuffling
           Turn on or off hidden shuffle phase for rubik.

      -/+border
           Turn on or off borders in shape.

      -/+shadowing
           Turn on or off shadowing in shape.

      -/+stippling
           Turn on or off stippling in shape.

      -intensity value
           Set the brightness (default 2185) of the sierpinski structure for
           sierpinski3d.

      -maxdepth value
           Set the maximum depth (up to 10) of the sierpinski structure for
           sierpinski3d.

      -speed value
           Determines after how much steps the depth changes for
           sierpinski3d.

      -trek num
           If its a high number you will see the space ship all the time in
           star.

      -/+rock
           Turn on and off rocks for star. If this is off, stars will be
           seen instead.

      -/+straight
           Turn on if star gets you motion sick.

      -cyclepeed num
           Set speed of cycling in starfish.

      -rotation num
           Set rotation velocity in starfish.

      -thickness num
           Set thickness in starfish.

      -/+rock
           Turn on and off blob for starfish.



                                   - 31 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -spinspeed num
           Set speed of rotation, in degrees per frame for superquadrics.

      -/+bonus
           Turn on in tetris to see 5 square bonus pieces.

      -/+well
           Turn on in tetris to see welltris.

      -ttfont filename
           Sets the True Type font file (or font directory) used for text3d

      -extrusion num
           Sets length of the text extrusion for text3d

      -rot_amplitude float
           Sets rotation amplitude value of each letter for text3d

      -rot_frequency float
           Sets rotation frequency for text3d

      -/+no_split
           Turn on and off word splitting for text3d

      -ttanimate function_name
           Sets the animation function used for text3d. Currently one of :
           Random  FullRandom  Default  Default2  None  Crazy  UpDown
            Extrude  RotateXY  RotateYZ  Frequency  Amplitude

      -speed km/h
           The speed for all planes in km/h for xcl.

      -frametime microseconds
           The time for one frame on the screen. This time is used to
           calculate the delay time and depends on the speed of the X server
           for xcl.

      -line_length mm
           The distance between the pilot and the plane for xcl.

      -spectator mm
           The distance between spectator and pilot. It should be grater
           than the line_length and the half wing width of the plane to be
           not dangerous for the spectator for xcl.

      -viewmodel
           Shows an animated view of one model for xcl.

      -/+oldcolor
           Sets the colors for the first two planes fixed to red and yellow
           in xcl.



                                   - 32 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      -xcldebug
           Shows some additional timing information to make sure that the
           calibrate procedure goes right in xcl.

      -automatic
              The auto scale for automatic fit into the window is
              Deactivated with this option for xcl.

      -randomstart
           Use a random start point for models at startup for xcl.

      -preset  num
           Use the preset num [1-5] for biof.

      -lines  num
           Use num lines in biof.

      -points  num
           Use num points in biof.

      -/+offangle
           Use offangle in biof.

      -duration seconds
           Allows one to set a duration for a mode in random. Duration of 0
           is defined as infinite.

      -/+fullrandom
           Turn on/off randomness options within modes in random. Not
           implemented for all mode options.

      -modelist textstring
           Allows one to pass a list of files to randomly display to random.
           "all" will get all files but blank (and bomb if compiled in).
           "all,blank" will get all modes.  "all,-image bounce,+blank" will
           get all modes excluding image and bounce modes.  "bug wator" will
           get only bug and wator.  "allgl" will get only the GL modes if
           compiled in, all-allgl will get all excluding the GL modes,
           "allnice" will weed out high cpu usage modes (as well as hackers
           and gl modes).  "allxpm" will get all modes that use xpm.
           "allwrite" will get all modes that take advantage of writable
           colormaps (not including xpm).  "all3d" will get all the modes
           that support this option.  "allmouse" will get all the modes that
           support mouse interaction.  Similarly, "allautomata" for automata
           modes, "allfractal" for fractal modes, "allgeometry" for geometry
           modes, "allspace" for space modes.  The random mode itself can
           not be referenced.

      -/+sequential
           Turn on non-random random option.




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 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



 **WARNING**
      xlock can appear to hang if it is competing with a high-priority
      process for the CPU. For example, if xlock is started after a process
      with 'nice -20' (high priority), xlock will take  considerable amount
      of time to respond.


 SHADOW PASSWORDS
      If the machine is using a shadow password system, then xlock may not
      be set up to get the real password and so must be given one of its
      own. This can be either on the command line, via the -cpasswd option,
      or in the file $HOME/.xlockrc, with the first taking precedence.  In
      both cases an encrypted password is expected (see makekey(8)).  If
      neither is given, then xlock will prompt for a password and will use
      that, also storing an encrypted version of it in $HOME/.xlockrc for
      future use.


 XLOCK AND SSH-AGENT
      If you use ssh-agent(1) to avoid entering a passphrase every time you
      use one of your ssh(1) private keys, it's good security practice to
      have ssh-agent forget the keys before you leave your terminal
      unattended.  That way, an attacker who takes over your terminal won't
      be able to use your private ssh keys to log in to other systems.  Once
      you return to your terminal, you can enter the passphrase and re-add
      the keys to ssh-agent.  There are a couple of ways in which xlock can
      help to automate this process.  Firstly, the startCmd option allows
      xlock to be configured to run 'ssh-add -D' every time you lock the
      screen, so that your keys are automatically deleted from ssh-agent.
      If the passphrase on your ssh keys is the same as your password, then
      xlock can also be made to re-add the keys to ssh-agent when you unlock
      the screen, via the pipepassCmd option.  This requires a bit of
      scripting, as the command must read your password from standard input
      and then automate the interaction with ssh-add to re-add the keys.
      There is an example of such a script in the xlock distribution - see
      etc/xlockssh*


 BUGS
      "kill -KILL xlock " causes the server that was locked to be unusable,
      since all hosts (including localhost) were removed from the access
      control list to lock out new X clients, and since xlock could not
      catch SIGKILL, it terminated before restoring the access control list.
      This will leave the X server in a state where "you can no longer
      connect to that server, and this operation cannot be reversed unless
      you reset the server."           -From the X11R4 Xlib Documentation,
      Chapter 7.
      NCD terminals do not allow xlock to remove all the hosts from the
      access control list.  Therefore you will need to use the "-remote" and
      "-allowaccess" switches.  If you happen to run without "-allowaccess"
      on an NCD terminal, xlock will not work and you will need to reboot



                                   - 34 -           Formatted:  June 3, 2020






 XLOCK(1)                       X11R6 Contrib                       XLOCK(1)
                                7 March 2006



      the terminal, or simply go into the SETUP menus, under 'Network
      Parameters', and turn off TCP/IP access control.

 SEE ALSO
      X(1), Xlib Documentation.


 AUTHOR
      Maintained by:
           David Albert Bagley, <bagleyd@tux.org>

      The latest version is currently at:
           ftp://ftp.tux.org/pub/tux/bagleyd/xlockmore
           ftp://ftp.x.org/contrib/applications

      Original Author:
           Patrick J. Naughton, <naughton@eng.sun.com>
           Mailstop 21-14
           Sun Microsystems Laboratories, Inc.
           Mountain View, CA  94043
           415/336-1080

      with many additional contributors.


 COPYRIGHT
      Copyright (c) 1988-1991 by Patrick J. Naughton
      Copyright (c) 1993-2005 by David A. Bagley

      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.
      The original BSD daemon is Copyright (c) 1988 Marshall Kirk McKusick.
      All Rights Reserved.
      DEC, HP, IBM, Linux, SCO, SGI, and Sun icons have their respective
      copyrights.
















                                   - 35 -           Formatted:  June 3, 2020