Manpages

NAME

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

SYNOPSIS

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

DESCRIPTION

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

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

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

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).

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.

bouboule

Shows Mimi’s bouboule of moving stars.

bubble3d

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

discrete

Shows various discrete maps.

fadeplot

Shows a fading plot of sine squared.

glplanet

Animates texture mapped sphere (planet)

lightning

Shows Keith’s fractal lightning bolts.

mandelbrot

Shows mandelbrot sets.

molecule

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

mountain

Shows Papo’s mountain range.

polyominoes

Shows attempts to place polyominoes into a rectangle.

sierpinski

Shows a Sierpinski’s triangle.

sierpinski3d

Shows a Sierpinski’s gasket.

solitare

Shows Klondike’s game of solitare.

sproingies

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

starfish

Shows starfish.

superquadrics

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

text3d | text3d2

Shows 3D moving texts.

thornbird

Shows an animated Bird in a Thorn Bush fractal map.

triangle

Shows a triangular mountain range.

−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 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 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 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 speed in milliseconds betewwen 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 roll mode it is the number of points.

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

In rubik mode it is the number of moves.

In sballs mode it is the number of spheres.

In scooter mode it is the number of doors.

In shape mode it means nothing.

In sierpinski mode it is the number of points.

In slip mode it means nothing.

In solitare mode it means nothing.

In space mode it is the number of stars.

In sphere mode it means nothing.

In spiral mode it is the number of spirals.

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

In sproingies mode it is the number of sproingies.

In stairs mode it is means nothing.

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

In starfish mode it means nothing.

In strange mode it means nothing.

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

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 depreciated 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, flag, flow, forest, galaxy, helix, hop, hyper, ico, 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 and tik_tak, 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.

-/+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.

-/+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, and tube.

-/+label

Turn on and off alternate space and number labeling in apollonian. 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, solitare, sballs, swarm, and tetris. For maze, pacman, solitare and tetris this may not be available depending on how xlock was configured.

-/+texture

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

−rule <rule>

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

−lifefile filename

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

-/+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.

-/+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.

-/+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.

−patterntrace num

Allows one to see the trails for juggle.

-/+solid

Turn off and on solid color (else its a 4 panel look (half white)) for 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.

-/+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.

-/+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. -/+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.

−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.

−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 Albert Bagley, <bagleyd [AT] tux.org>

The latest version is currently at:

ftp://ftp.tux.org/pub/tux/bagleyd/xlockmore
ftp://ftp.x.org/contrib/applications

Original Author:

Patrick J. Naughton, <naughton [AT] eng.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) 1993-2004 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.