wyle@ethz.UUCP (01/16/87)
Does anyone out there have a shell script / program to change
the prompt DYNAMICALLY after each [CR]?
I would like to choose a random prompt from a large file, and
I would like the flexibility to add: node, directory, etc. to
the generated prompt.
I would prefer NOT to write a new shell.
Ideas?
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EEEEE T H H 8092 Zuerich, Switzerland| "Ignore alien orders"lvc@danews.UUCP (01/18/87)
What shell are you using? It is possible in the Korn shell.
Impossible in the Bourne shell. I don't know about the C-shell.
My prompt includes a clock that is updated at every keystroke.
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Larry Cipriani Cornet 353-4999 AT&T (614) 860-4999
{ihnp4|cbosgd}!cbsck!lvc AT&T Network Systems rm 2B-220cdash@boulder.UUCP (Charles Shub) (01/20/87)
In article <432@ethz.UUCP> wyle@ethz.UUCP (Mitchell Wyle) writes: >Does anyone out there have a shell script / program to change >the prompt DYNAMICALLY after each [CR]? > it is simple to define a command/alias to set your prompt and then redefine commands to also set your prompt alias cd 'chdir \!*;SP' alias SP 'set prompt="$MACHINE-`basename $cwd` \! > "' then the prompt does what you want
storm@diku.UUCP (01/23/87)
In article <432@ethz.UUCP> wyle@ethz.UUCP (Mitchell Wyle) writes: >Does anyone out there have a shell script / program to change >the prompt DYNAMICALLY after each [CR]? You cannot use a shell script or a program to change the shell prompt dynamically, because the PS1/prompt variables are local to the shell, and therefore they can only be changed by the shell itself. I don't know of any hooks into the Bourne/C shells which enables you to recognize that CR has been typed, and thus not to execute any commands in connection with execution of other commands. BUT you should try out the following 'trick' which gives some of the functionality you want: Include the following lines in your .profile (this is Bourne Shell) or type them in directly if you like: trap 'PS1="`fortune` > "' 5 while true ; do sleep 10 ; kill -5 $$ done & Now watch what happens after the execution of the next command. This is not exactly what you asked for, but the idea might be of some use to you. -- Kim F. Storm, storm@diku.UUCP (via seismo or mcvax or ...) Institute of Datalogy(=CS), U of Copenhagen, Universitetsparken 1, DK-2100 OE
serge@imag.UUCP (02/02/87)
In article <2935@diku.UUCP> storm@diku.UUCP writes: >You cannot use a shell script or a program to change the shell prompt >dynamically, because the PS1/prompt variables are local to the shell, >and therefore they can only be changed by the shell itself. avec la commande chdir : echo directory ? read dir cd $dir && PS1=`pwd`" $ " et l'appel de commande : . chdir -- ================================================================================ serge@imag.UUCP or {seismo.css.gov|mcvax|inria}!imag!serge Rouveyrol Serge,Laboratoire L.G.I,BP 68,38402 St Martin d'Heres CEDEX,FRANCE tel 76 51 46 00 poste 5132
wcs@ho95e.UUCP (02/03/87)
In article <2935@diku.UUCP> storm@diku.UUCP writes: >In article <432@ethz.UUCP> wyle@ethz.UUCP (Mitchell Wyle) writes: >>Does anyone out there have a shell script / program to change >>the prompt DYNAMICALLY after each [CR]? > >You cannot use a shell script or a program to change the shell prompt >dynamically, because the PS1/prompt variables are local to the shell, >and therefore they can only be changed by the shell itself. If all you want to do is set the prompt based on a few variables (process id, current directory, some-shell-variable, history-number), ksh and csh have some hooks to do these. I don't know csh, but I've seen people whose prompt includes a number incremented by 1 each command; makes it easier to use csh's boring version of history. Ksh (which is upward-compatible with sh, and has decent history), allows you to evaluate variables each time you access PS1. Thus, my PS1 is set to PS1='e!!${PWD}> ' which looks like e!/usr/spool/news> (the ! is doubled to prevent csh-like history-number substitution) I don't think you can do execution at the prompt (which would be really slow), but the newer versions of ksh let you set SECONDS to get a crude clock. SECONDS=0; export SECONDS PS1='Logged in $SECONDS: ' You can also set MAILPATH to check files other than just $MAIL. -- # Bill Stewart, AT&T Bell Labs 2G-202, Holmdel NJ 1-201-949-0705 ihnp4!ho95c!wcs