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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: /bin/test and stat(2)
Message-ID: <29056@sun.uucp>
Date: Thu, 24-Sep-87 18:36:24 EDT
Article-I.D.: sun.29056
Posted: Thu Sep 24 18:36:24 1987
Date-Received: Sat, 26-Sep-87 17:47:47 EDT
References: <9479@brl-adm.ARPA>
Sender: news@sun.uucp
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> I understand that the 'stat' system call on a NULL string for a file name
> will default to '.' (DOT), the current directory.

Umm, it doesn't do this on every system.  DO NOT RELY ON THIS BEHAVIOR.

> But what I would like to know is, why does the test -d of a
> NULL string in the following sample script return true?

Don't rely on *this* behavior either - check that a string isn't null before
handing it to "/bin/test"!
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com