Article View: comp.bugs.sys5
Article #79Re: ksh bugs
From: Tom Neff
Date: Tue, 22 Aug 1989 14:08
Date: Tue, 22 Aug 1989 14:08
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1359 bytes
In article <1170@vsi.COM> friedl@vsi.COM (Stephen J. Friedl) writes:
>In article <14571@bfmny0.UU.NET>, tneff@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@bfmny0.UU.NET
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<14579@bfmny0.UUCP>Path:
arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!gem.mps.ohio-state.edu!ginosko!uunet!bfmny0!tneffReferences:
<10166@fluke.COM> <10450@fluke.COM> <177@uci.UUCP> <1035@virtech.UUCP> <14571@bfmny0.UU.NET> <1170@vsi.COM>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!gem.mps.ohio-state.edu!ginosko!uunet!bfmny0!tneff From: tneff@bfmny0.UUCP (Tom Neff) Newsgroups: comp.bugs.sys5 Subject: Re: ksh bugs Keywords: ksh Message-ID: <14579@bfmny0.UUCP> Date: 22 Aug 89 14:08:38 GMT References: <10166@fluke.COM> <10450@fluke.COM> <177@uci.UUCP> <1035@virtech.UUCP> <14571@bfmny0.UU.NET> <1170@vsi.COM> Reply-To: tneff@bfmny0.UU.NET (Tom Neff) Distribution: na Organization: ^ Lines: 25