Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!purdue!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.unix.questions
Subject: Re: ksh(1) bug?
Keywords: ksh korn shell
Message-ID: <12456@smoke.BRL.MIL>
Date: 28 Mar 90 22:28:17 GMT
References: <710@gtenmc.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 9

In article <710@gtenmc.UUCP> stumpf@gtenmc.UUCP (Jon S. Stumpf) writes:
>	ls | > tmp
>Looking at the grammar on page 310-311 in "The Korn Shell" by Bolsky
>and Korn, I believe that a "command" cannot reduce into nothing.

However, the Korn shell attempts to be upward compatible with the Bourne
shell, which doesn't really have a rigorous grammar (although it comes
much closer than the Cshell).  In the Bourne shell, >tmp is the easiest
way to create a 0-length file.