xlock

XLOCK(1)                     General Commands Manual                    XLOCK(1)



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 ] [ -/+showdate ] [
       -/+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 ] [ -/+xinerama ] [ -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.

       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.

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

       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.

       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.

       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.

       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.

       juggle  Shows a 3D 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.

       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.

       pyro2   Shows other fireworks.

       qix     Shows spinning lines a la Qix(tm).

       roll    Shows a rolling ball.

       rain    Shows rain.

       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.

       skewb   Shows an auto-solving Skewb.  May not be available depending on
               how it was configured.

       slip    Shows slipping blits.

       solitaire
               Shows Klondike's game of solitaire.

       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.

       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.

            In apollonian mode it is the number of possible ways to embed
            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 = 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.

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

            In juggler3d 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.

            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 pyro2 mode it is means nothing.

            In rain mode it is means nothing.

            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 skewb mode it is the number of moves.

            In slip mode it means nothing.

            In solitaire 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.

            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, deco,
            demon, dilemma, discrete, dragon, eyes, fiberlamp, flag, flow,
            forest, galaxy, helix, hop, hyper, ico, juggle, juggler3d, 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 degree move, for sballs it is the sphere speed value, for
            scooter it is the speed, for skewb it is the number of steps to
            complete a 120 degree move, 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.

       -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 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 deactivated.

       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.

       -/+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.

       -/+showdate
            Allows you to turn on and off the date on password window.  On by
            default.

       -/+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.

       -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 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, skewb, 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 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 not be
            automatically logged out."

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

       -/+xinerama
            Turn on/off Xinerama.  This option is only available if Xinerama
            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.

       -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.  Minimum timeout is 5 seconds.

       -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.  Minimum timeout
            is 5 seconds.

       -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.  Minimum
            timeout is 5 seconds.


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, voters, wator,
            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, tik_tak, toneclock, 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 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, solitaire,
            sballs, swarm, and tetris.  For maze, pacman, solitaire 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 B<neighborhood>/S<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 B3/S23.  Others are B36/S23 and B3678/S34678.  For
            life3d good examples are Bay's rules which are B5/S45, B6/S567,
            B5/S56, and B67/S67.  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

       -/+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.

       -/+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.

       -/+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.

       -/+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.

       -/+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 B3/S23 life.

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

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

       -/+callahan
            Turn on and off Paul Callahan's B2o/S2m34 hexagonal life.

       -/+andreen
            Turn on and off Bob Andreen's B2o3o4m/S2om4o hexagonal life.

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

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

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

       -/+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.

       -/+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.

       -msg textstring
            Allows one to pass different explosion elements to pyro2.  The
            explosion types is one of &0, &1, ... &9, &a, ... &f each of which
            presents a different type of explosion.  Normal text can be sent,
            the string may contain blanks if quoted.  An operation system logo
            will be shown, if the # sign is sent.

       -fnt font
            Allows one to pass different elements to pyro2.

       -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 and skewb.

       -/+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.

       -curve num
            Set the curve factor of the attractors for strange.

       -points num
            Change the number of points/iterations each frame for strange.

       -point-size num
            Change the size of individual points for strange.

       -zoom float
            Zoom in or out for strange.

       -brightness float
            Adjust the brightness for accumulator mode for strange.

       -motion-blur float
            Adds motion blur for strange.

       -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.

       -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.

       -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.


**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 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 A. Bagley, <bagleyd AT verizon.net>

       The latest version is currently at:
              https://www.sillycycle.com/xlock
              http://ibiblio.org/pub/Linux/X11/screensavers

       Original Author:
              Patrick J. Naughton, <naughton AT 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) 1993-2019 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.

       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.
       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.



X11R6 Contrib                      04 Dec 2019                          XLOCK(1)