ksh bugs
Tom Neff
tneff at bfmny0.UUCP
Wed Aug 23 00:08:38 AEST 1989
In article <1170 at vsi.COM> friedl at vsi.COM (Stephen J. Friedl) writes:
>In article <14571 at bfmny0.UU.NET>, tneff at bfmny0.UU.NET (Tom Neff) writes:
>
>> export ENV='${Envfile[(_$-=1)+(_=0)-(_$-!=_${-%%*i*})]}'
>
>Hey, cool! I didn't know that ksh had a built-in APL interpreter!
>
>P.S. - or is that sed script?
Actually it's a subscript expression, which evaluates to either $Envfile
or the null string depending on whether $- (the current flags) has an "i"
(for interactive) in it or not. Admittedly it looks like gobbledygook.
But it also shows how cute you can get in Korn shell.
If I hadn't seen the expression my .profile would say
case $- in
*i*) export ENV=$Envfile ;;
*) export ENV="" ;;
esac
In fact it probably should anyway. :-)
--
"We walked on the moon -- (( Tom Neff
you be polite" )) tneff at bfmny0.UU.NET
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