Built-in String Processing?

[Boyd Roberts]

In article <1990Oct27.215051.14085 at midway.uchicago.edu>, phd_ivo at gsbacd.uchicago.edu writes:
> *************
> I am running a csh with enhancements on my NeXT and on an HP-9000/8xx.
> I have a macro to define my prompt to be the current directory, i.e.
> 
> 	alias cd                'cd \!* && set prompt="\! ${cwd}> "'
> 
> Unfortunately, this gives me a rather long string...
>

With a decent* shell you just go:

    cd()
    {
	builtin cd $1 &&
	case "$1" in
	'')
	    PS1="% " ;;
	..|*/..)
	    PS1="`basename \`/bin/pwd\``% " ;;
	/)
	    PS1="/% " ;;
	*/*)
	    PS1="`basename $1`% " ;;
	*)
	    PS1="$1% " ;;
	esac
    }



Boyd Roberts			boyd at necisa.ho.necisa.oz.au

``When the going gets wierd, the weird turn pro...''

* V8/V9