SPLITVT(1)						      NONESSENTIAL UTILITIES							SPLITVT(1)

NAME

       splitvt - run two shells in a split window

SYNOPSIS

       splitvt [options] [shell]

OPTIONS

       -upper command
	      Runs 'command' in the upper window

       -lower command
	      Runs 'command' in the lower window

       -bottom
	      Stats with the focus in the bottom window

       -s numlines
	      Sets 'numlines' to the number of lines in the top window.  This number will be modified if the screen isn't big enough to handle the
	      full size.

       -t title
	      Sets an xterm title bar to 'title'

       -login Runs the programs under each window as though they were login shells.  This is useful to have csh  source  it's  .login  file,  bash
	      source .profile, etc.

       -nologin
	      Ovverrides any "set login on" statement in the startup file.

       -rcfile file
	      Loads 'file' as the startup file instead of ~/.splitvtrc.

       -norc  Suppresses loading your ~/.splitvtrc

       -f     Allow setting the height of either the top or the bottom window to less than 3 lines.

       -v     Print out the version number of splitvt

DESCRIPTION

       This  program  splits  the screen into two windows, one above the other, and runs a shell in each one.  The default shell is taken from the
       SHELL environment variable, or /bin/csh if SHELL isn't in the environment, but another shell can be specified on the command line.

       The top window is the default current window, but you can change to the other by pressing ^W.  Pressing ^V will quote the next character to
       the current shell.  Pressing ^O will put splitvt into command mode.

       These special characters (command mode, switch window, and quote next character) can be modified from within the .splitvtrc file.

       When  in  command  mode,  splitvt will read one non-numeric character, perform the requested command, and then revert to normal operations.
       Numeric characters are interpreted as a parameter for the specified command.  The currently supported commands are:

       'h'    Print a help window for the escape commands

       '-'    Shrink the current window

       '+'    Expand the current window

       'c'    Select a block of text in the current window

       'p'    Paste the selected text to the current window

       'k'    Kill the current window (hangup signal)

       'x'    Lock the screen, after prompting for password

       'r'    Repaint the screen (clearing screen garbage)

       'q'    Quickly quit splitvt, killing the running shells

       More functions may be added in the future.

       If the -s command line option is used, the upper window will be bound to the user defined number of lines even if the  screen  is  resized.
       Otherwise, the screen will be split into two equal parts based on the new size of the screen.

       The environment variable SPLITVT is set in the shells forked by splitvt.  In the shell running in the upper window, this variable is set to
       the value "upper", while the shell running in the lower window has this variable set to the value "lower".  This is useful in shell scripts
       to  provide  different  behavior depending on which window the script is running in.  An example of this is shown in the file "menu" in the
       examples directory in the splitvt distribution.

       When splitvt starts up, it looks in your home directory for a file named

       .splitvtrc You can set a number of parameters from within this file, including all of the special characters, the default number  of  lines
       in the upper window, whether or not to run the commands as login shells, and even default commands to run in each window.

       Here is an example of a .splitvtrc file:

	    # This is an example .splitvtrc file.
	    set command_char	    ^O
	    set quote_char	    ^V
	    set switch_char	    ^W
	    set upper_lines	    12
	    run -upper		    /bin/sh
	    run -lower		    top
	    set login		    on
	    # This next line would override the above run statements
	    #run /bin/tcsh

       If  programs  like vi are doing strange things to the window while in splitvt, you probably need to set the LINES environment variable to a
       correct value, or set the terminal's window sizing correctly.  This should be done automatically, but may need to be corrected.

       If you are running under an xterm window, the title bar will probably be updated to show the version  of  splitvt  that	you  are  running.
       Under a true xterm window, you can also switch which half of the window you are typing into by clicking the mouse in the half of the window
       in which you want to type.  You can also drag and drop the separator bar by pressing down on the mouse button over the separator bar, hold-
       ing it down, moving the mouse to where you want the bar to end up, and then releasing the button.

       splitvt	will  attempt  to  erase the current utmp entry, and replace it with entries for the two windows.  This allows you to use programs
       such as 'talk' within the splitvt windows.  If you do not have write permission to the /var/run/utmp file, you will not be able	to  modify
       the utmp entries.

       splitvt can be made set-uid root.  splitvt will reset its user id to that of the person running it, just before it exec()'s the shell under
       the window.  The splitvt process remains with root permissions, and will change ownership of the pseudo terminals to  that  of  the  person
       running splitvt, and then reset it to root when the window is closed.

       SPLITVT IS NOT GUARANTEED TO BE A SAFE SET-UID PROGRAM!

       I  have done all I know to keep splitvt a safely usable set-uid program, but I do not know everything, and am not responsible for any secu-
       rity weaknesses splitvt might posess.

BUGS

       When used with a certain public domain version of ksh, you have to manually kill -9 on the shell processes after you  quit  splitvt.   This
       has to do with a bug in that version of ksh (Version 06/03/86a and possibly others).

       If  splitvt is compiled with xterm support, when run under an xterm, the cut and paste feature is semi-disabled.  The title bar may also be
       reset to the string "xterm" after splitvt quits.  See the comments at the top of splitvt.c for how to disable xterm support.

       Ansi colors are not repainted on screen refresh.

CAVEATS

       There may be conflicts between splitvt's characters and other programs.	You can either change splitvt's default  characters  with  command
       line options, or you can type Ctrl-V (the quote character) within splitvt, and the next character typed will be sent to the current window,
       no matter what it is.

       splitvt can only be used by terminals using vt100 emulation, due to the use of specific vt100 escape codes.  (vt300, xterm, Linux  console,
       etc, emulation also works)

       When  running  in  an xterm, if you press the escape key, you will have to type another character in order for the escape to be seen by the
       running program.

AUTHOR

       Sam Lantinga   slouken@cs.ucdavis.edu

SPLITVT 
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