Newsgroups: comp.unix.shell
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!ukma!s.ms.uky.edu!eric
From: eric@ms.uky.edu (Eric H. Herrin II)
Subject: Re: KSH-How do I make a variable run a function upon invocation?
Message-ID: <eric.671405972@s.ms.uky.edu>
Keywords: KSH function variable assignment substitution
Organization: University Of Kentucky, Dept. of Math Sciences
References: <1991Apr10.035042.3008@ux1.cso.uiuc.edu>
Date: Thu, 11 Apr 1991 21:39:32 GMT
Lines: 37

jbn35564@uxa.cso.uiuc.edu (J.B. Nicholson) writes:

>In KSH I want to make ${PS1} take on a value where it executes a function called
>PS1, but not take on the output from the function itself.  Here's what I mean:

>function PS1 {
>shrunkhome=${PWD%${HOME}/}
>case ${shrunkhome} in
>        ${HOME})        shrunkhome=\~/ ;;
>esac
>HOSTNAME=$(hostname)
>print -n '<'${USER}'@'${HOSTNAME%%.*}':'${shrunkhome}'> ' ;;
>}

Try this:

function _cd {
   unalias cd
   cd $1
   alias cd=_cd
   if [ "${PWD#${HOME}}" != "${PWD}" ]
   then
           PS1='"${USER}@${HOSTNAME%%.*}:~/${PWD#${HOME}}> "'
   else
           PS1='"${USER}@${HOSTNAME%%.*}:${PWD}> "'
   fi
}

and alias cd to '_cd' as you suggested in your original article.  I
did test this and it does work. (ksh version 11/16/88d)  You might
want to put some error checking in the _cd function though.



-- 

|  	Eric H. Herrin II - {rutgers,uunet}!ukma!eric, eric@ms.uky.edu	     |