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XKIBITZ(1) General Commands Manual XKIBITZ(1) NAME xkibitz - allow multiple people to interact in an xterm SYNOPSIS xkibitz [ xkibitz-args ] [ program program-args... ] INTRODUCTION 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 co- operative 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. USAGE 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- tion. 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 display. 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. Normally, all characters are passed uninterpreted. However, in the es- cape dialogue the user talks directly to the xkibitz interpreter. Any Expect(1) or Tcl(3) commands may also be given. Also, job control may be used while in the interpreter, to, for example, suspend or restart xkibitz. Various processes can produce various effects. For example, you can emulate a multi-way write(1) session with the command: xkibitz sleep 1000000 ARGUMENTS xkibitz understands a few special arguments which should appear before 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- tional displays: xkibitz -display mercury -display fox -display dragon:1.0 CAVEATS 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- mand. 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. ENVIRONMENT 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" export XKIBITZ_XTERM_ARGS (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. SEE ALSO 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. "kibitz - Connecting Multiple Interactive Programs Together", by Don Libes, Software - Practice & Experience, John Wiley & Sons, West Sus- sex, England, Vol. 23, No. 5, May, 1993. AUTHOR Don Libes, National Institute of Standards and Technology 06 October 1994 XKIBITZ(1)
NAME | SYNOPSIS | INTRODUCTION | USAGE | ARGUMENTS | CAVEATS | ENVIRONMENT | SEE ALSO | AUTHOR
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