XLOCK(1X11)             COMMAND REFERENCE             XLOCK(1X11)



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

SYNOPSIS
     xlock [ -color ] [ -root ] [ -time timeout ]

     This is a user-contributed client.

DESCRIPTION
     The xlock program locks the X server until you enter your
     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 the "real plane" iterative fractals from the
     September 1986 issue of Scientific American are put on the
     screen.

     The pattern changes after 10-20K iterations or when the
     Return key is pressed.  If the password of the user who
     started xlock is typed, then the screen is unlocked and the
     X server is restored.

     When typing the password, characters are not echoed to the
     screen, but Control-U and Control-H are active as killline
     and erase respectively.

OPTIONS
     -color         The color option installs a hue ramp at full
                    saturation and intensity, so that the pixels
                    are drawn in successive colors.

     -root          The root option allows the root password to
                    unlock the server as well as the user who
                    started xlock.

     -time  timeout The time option sets the number of seconds
                    that each unique fractal will remain on the
                    screen before being replaced by the next one
                    to timeout.

CAVEATS
     The command kill -KILL xlock causes server to be unusable,
     since xlock has removed all hosts (including localhost) from
     the access control list to lock out all new X clients.
     SIGKILL cannot be caught by any program, xlock will
     terminate 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 short of resetting the server.





Printed 3/22/89                                                 1

XLOCK(1X11)             COMMAND REFERENCE             XLOCK(1X11)



SEE ALSO
     X(1x11), and XlibDocumentation.

AUTHORS
     milliken@heron.bbn.com, karlton@wsl.dec.com,
     dana@thumper.bellcore.com, vesper@3d.dec.com

















































Printed 3/22/89                                                 2

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