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From:	Oleksandr Gavenko <gavenkoa AT gmail DOT com>
Subject:	'test' utility behavior question.
Date:	Mon, 30 Aug 2010 20:27:52 +0300
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   $ /bin/test -d && echo ok
ok
   $ /bin/test -d '' && echo ok || echo must_be_error
must_be_error

POSIX require argument for -d, so behavior implementation
depend.

I can not check another 'test' implementation now.
For me  get error is more convenient,
because this not break this code if $dir not defined:

   if [ -d $dir ]; then
     do-good-job;
   else
     info-user-about-missing-dir;
   fi

To resolve upper code I rewrite condition in POSIX compatible form:

   [ -d "$dir" ]

-- 
Best regards!


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