Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!purdue!bu-cs!ics!david
From: david@ics.COM (David B. Lewis)
Newsgroups: comp.unix.questions
Subject: Unusual (?) problem with cd in ksh
Keywords: ksh, cd, core dump
Message-ID: <456@ics.COM>
Date: 9 May 89 15:39:03 GMT
Distribution: comp
Organization: Integrated Computer Solutions Inc., Cambridge MA
Lines: 20


The command 
	``
kills ksh when run at the command line or in a shell script.
csh and sh handle it fine.
	`echo pwd` 
and non-null arguments are handled fine.
I noticed this in a script which was in fact executing 
	cd ``

Is a null `` undefined? 
What can be expected of this construct across shells?

(I checked "Unix Shell Programming" by Kochan and Woods without
seeing anything relevent to the exceptional case.)
-- 
David B. Lewis david@ics.com ics!david@buita.bu.edu david%ics.UUCP@buita.bu.edu

"An organization designing a system will produce a copy of its own
communication structure." - Melvin Conway