Built-in String Processing?

[Chet Ramey]

In article <1902 at necisa.ho.necisa.oz> boyd at necisa.ho.necisa.oz (Boyd Roberts) writes:

$ 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
$     }

$ * V8/V9

Don't be so elitist :-).  Bash can do this, too.  In fact, I stole this
some time ago for an example in the bash texinfo manual (which is not out
yet).  Bash doesn't make you jump through hoops quoting backquotes, either.
(so there! :-)

Chet

-- 
Chet Ramey			``As I recall, Doug was keen on boxing.  But
Network Services Group		  when he learned to walk, he took up puttin'
Case Western Reserve University	  the boot in the groin.''
chet at ins.CWRU.Edu