Provided by: xlockmore_5.27-1_i386 bug

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 ] [ -/+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  ]  [  -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.

       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.

       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.

       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.

       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  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 = 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 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 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, 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.

       -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.

       -/+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.

       -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, 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.

       -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.

       -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,
            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 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

       -/+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 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.

       -/+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.

       -/+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.

       -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.

       -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.

**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@tux.org>

       The latest version is currently at:
              ftp://ftp.tux.org/pub/tux/bagleyd/xlockmore
              ftp://ibiblio.org/pub/Linux/X11/screensavers

       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.