From owner-freebsd-bugs  Sun Aug  1 11: 0:18 1999
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Date: Sun, 1 Aug 1999 11:00:02 -0700 (PDT)
Message-Id: <199908011800.LAA47664@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
Cc: 
From: "Danny J. Zerkel" <dzerkel@columbus.rr.com>
Subject: Re: bin/12137: something wrong with shell -- functions with arithm 
 expressions
Reply-To: "Danny J. Zerkel" <dzerkel@columbus.rr.com>
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The following reply was made to PR bin/12137; it has been noted by GNATS.

From: "Danny J. Zerkel" <dzerkel@columbus.rr.com>
To: freebsd-gnats-submit@freebsd.org, mi@aldan.algebra.com
Cc:  
Subject: Re: bin/12137: something wrong with shell -- functions with arithm 
 expressions
Date: Sun, 01 Aug 1999 13:51:38 -0400

 Mikhail,
 
 Well the addition is not required, nor does it have to be a function.
 This problem occurs when taking the length of an numbered argument value
 inside an algorithmic expression.
 
 So this displays the same error:
 
 	set -- "abc (def [xyz])"
 	echo $((${#1}))
 
 The problem appears to be that the argument variable is being parsed for
 special characters, which result in an extra character for every
 character
 in the set:
 
 	!*?[=~:/-
 
 This parsing should not occur if we are going to take the length of the
 resulting string.  Try this to see it:
 
 	set -- "!*?[=~:/-"
 	echo $((${#1}))
 
 18!
 
 This patch should fix only this problem, without any side effects:
 
 --- /usr/src/bin/sh/parser.c.orig       Sun Sep 13 15:24:57 1998
 +++ /usr/src/bin/sh/parser.c    Sun Aug  1 13:37:33 1999
 @@ -1239,7 +1239,7 @@
                 } else {
                         pungetc();
                 }
 -               if (dblquote || arinest)
 +               if (subtype != VSLENGTH && (dblquote || arinest))
                         flags |= VSQUOTE;
                 *(stackblock() + typeloc) = subtype | flags;
                 if (subtype != VSNORMAL)
 
 
 -- Danny J. Zerkel
 dzerkel@columbus.rr.com
 


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