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.TH SPLITVT 1 "1/5/95" "SPLITVT" "NONESSENTIAL UTILITIES"
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splitvt - run two shells in a split window
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splitvt [options] [shell]
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Runs 'command' in the upper window
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Runs 'command' in the lower window
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Stats with the focus in the bottom window
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Sets 'numlines' to the number of lines in the top window. This number
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will be modified if the screen isn't big enough to handle the full
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Sets an xterm title bar to 'title'
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Runs the programs under each window as though they were login shells.
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This is useful to have csh source it's .login file, bash source .profile,
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Ovverrides any "set login on" statement in the startup file.
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Loads 'file' as the startup file instead of ~/.splitvtrc.
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Suppresses loading your ~/.splitvtrc
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Print out the version number of splitvt
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This program splits the screen into two windows, one above the other,
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and runs a shell in each one. The default shell is taken from the
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SHELL environment variable, or /bin/csh if SHELL isn't in the
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environment, but another shell can be specified on the command line.
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The top window is the default current window, but you can change to
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the other by pressing ^W. Pressing ^V will quote the next character
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to the current shell. Pressing ^O will put splitvt into command mode.
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These special characters (command mode, switch window, and quote next
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character) can be modified from within the .splitvtrc file.
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When in command mode, splitvt will read one non-numeric character,
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perform the requested command, and then revert to normal operations.
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Numeric characters are interpreted as a parameter for the specified
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command. The currently supported commands are:
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Print a help window for the escape commands
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Shrink the current window
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Expand the current window
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Select a block of text in the current window
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Paste the selected text to the current window
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Kill the current window (hangup signal)
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Lock the screen, after prompting for password
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Repaint the screen (clearing screen garbage)
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Quickly quit splitvt, killing the running shells
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More functions may be added in the future.
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If the -s command line option is used, the upper window will be bound
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to the user defined number of lines even if the screen is resized.
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Otherwise, the screen will be split into two equal parts based on
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the new size of the screen.
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The environment variable SPLITVT is set in the shells forked by splitvt.
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In the shell running in the upper window, this variable is set to the
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value "upper", while the shell running in the lower window has this
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variable set to the value "lower". This is useful in shell scripts to
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provide different behavior depending on which window the script is
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running in. An example of this is shown in the file "menu" in the examples
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directory in the splitvt distribution.
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When splitvt starts up, it looks in your home directory for a file named
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You can set a number of parameters from within this file, including
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all of the special characters, the default number of lines in the upper
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window, whether or not to run the commands as login shells, and even
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default commands to run in each window.
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Here is an example of a .splitvtrc file:
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# This is an example .splitvtrc file.
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# This next line would override the above run statements
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If programs like vi are doing strange things to the window while in
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splitvt, you probably need to set the LINES environment variable to a
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correct value, or set the terminal's window sizing correctly. This
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should be done automatically, but may need to be corrected.
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If you are running under an xterm window, the title bar will probably
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be updated to show the version of splitvt that you are running.
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Under a true xterm window, you can also switch which half of the window
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you are typing into by clicking the mouse in the half of the window
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in which you want to type. You can also drag and drop the separator
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bar by pressing down on the mouse button over the separator bar,
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holding it down, moving the mouse to where you want the bar to end up,
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and then releasing the button.
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splitvt will attempt to erase the current utmp entry, and replace it
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with entries for the two windows. This allows you to use programs
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such as 'talk' within the splitvt windows. If you do not have write
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permission to the /etc/utmp file, you will not be able to modify the
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splitvt can be made set-uid root. splitvt will reset its user id to
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that of the person running it, just before it exec()'s the shell under
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the window. The splitvt process remains with root permissions, and
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will change ownership of the pseudo terminals to that of the person
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running splitvt, and then reset it to root when the window is closed.
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SPLITVT IS NOT GUARANTEED TO BE A SAFE SET-UID PROGRAM!
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I have done all I know to keep splitvt a safely usable set-uid program,
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but I do not know everything, and am not responsible for any security
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weaknesses splitvt might posess.
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When used with a certain public domain version of ksh, you have to
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manually kill -9 on the shell processes after you quit splitvt. This
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has to do with a bug in that version of ksh (Version 06/03/86a and
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If splitvt is compiled with xterm support, when run under an xterm,
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the cut and paste feature is semi-disabled. The title bar may also
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be reset to the string "xterm" after splitvt quits. See the comments
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at the top of splitvt.c for how to disable xterm support.
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Ansi colors are not repainted on screen refresh.
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There may be conflicts between splitvt's characters and other
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programs. You can either change splitvt's default characters with
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command line options, or you can type Ctrl-V (the quote character)
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within splitvt, and the next character typed will be sent to the
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current window, no matter what it is.
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splitvt can only be used by terminals using vt100 emulation, due to
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the use of specific vt100 escape codes. (vt300, xterm, Linux console,
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etc, emulation also works)
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When running in an xterm, if you press the escape key, you will have
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to type another character in order for the escape to be seen by the
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Sam Lantinga slouken@cs.ucdavis.edu
added
removed
.pc/old.changes.patch/splitvt.1
