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xkibitz [ xkibitz-args ] [ program program-args... ]
xkibitz allows users in separate xterms to share one shell (or any pro-
gram that runs in an xterm). Uses include:
? A novice user can ask an expert user for help. Using xkib-
itz, the expert can see what the user is doing, and offer
advice or show how to do it right.
? By running xkibitz and then starting a full-screen editor,
people may carry out a conversation, retaining the ability
to scroll backwards, save the entire conversation, or even
edit it while in progress.
? People can team up on games, document editing, or other
cooperative tasks where each person has strengths and weak-
nesses that complement one another.
? If you want to have a large number of people do an on-line
code walk-through, you can sit two in front of each worksta-
tion, and then connect them all together while you everyone
looks at code together in the editor.
To start xkibitz, one user (the master) runs xkibitz with no arguments.
xkibitz starts a new shell (or another program, if given on the command
line). The user can interact normally with the shell, or upon entering
an escape (described when xkibitz starts) can add users to the interac-
To add users, enter "+ display" where display is the X display name.
If there is no ":X.Y" in the display name, ":0.0" is assumed. The mas-
ter user must have permission to access each display. Each display is
assigned a tag - a small integer which can be used to reference the
To show the current tags and displays, enter "=".
To drop a display, enter "- tag" where tag is the display's tag accord-
ing to the "=" command.
To return to the shared shell, enter "return". Then the keystrokes of
all users become the input of the shell. Similarly, all users receive
the output from the shell.
To terminate xkibitz it suffices to terminate the shell itself. For
example, if any user types ^D (and the shell accepts this to be EOF),
the shell terminates followed by xkibitz.
the program name (if given). Each argument should be separated by
whitespace. If the arguments themselves takes arguments, these should
also be separated by whitespace.
-escape sets the escape character. The default escape character is ^].
-display adds a display much like the "+" command. Multiple -display
flags can be given. For example, to start up xkibitz with three addi-
xkibitz -display mercury -display fox -display dragon:1.0
Due to limitations in both X and UNIX, resize propagation is weak.
When the master user resizes the xterm, all the other xterms are logi-
cally resized. Unfortunately, xkibitz cannot force the physical xterm
size to correspond with the logical xterm sizes.
The other users are free to resize their xterm but their sizes are not
propagated. The master can check the logical sizes with the "=" com-
Deducing the window size is a non-portable operation. The code is
known to work for recent versions of SunOS, AIX, Unicos, and HPUX.
Send back mods if you add support for anything else.
The environment variable SHELL is used to determine and start a shell,
if no other program is given on the command line.
If the environment variable DISPLAY is defined, its value is used for
the display name of the xkibitz master (the display with tag number 0).
Otherwise this name remains empty.
Additional arguments may be passed to new xterms through the environ-
ment variable XKIBITZ_XTERM_ARGS. For example, to create xterms with a
scrollbar and a green pointer cursor:
XKIBITZ_XTERM_ARGS="-sb -ms green"
(this is for the Bourne shell - use whatever syntax is appropriate for
your favorite shell). Any option can be given that is valid for the
xterm command, with the exception of -display, -geometry and -S as
those are set by xkibitz.
Tcl(3), libexpect(3) kibitz(1)
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Pro-
grams" by Don Libes, O'Reilly and Associates, January 1995.