From mboxrd@z Thu Jan  1 00:00:00 1970
From: Martijn Dekker <martijn@inlv.org>
Subject: Re: "case" bug in dash
Date: Wed, 02 Mar 2016 22:18:44 +0100
Message-ID: <56D758B4.6000005@inlv.org>
References: <20160302210914.GC1056@timmy>
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Cc: Adam Endrodi <adam.endrodi@nokia.com>

Adam Endrodi schreef op 02-03-16 om 22:09:
> The following program prints "boo" incorrectly (I'm trying to match
> non-numbers):

That's correct. In shell glob pattern bracket expressions, the standard
negator is '!' and not '^'. Many shells support '^' as a synonym, but
that's an extension to the standard and not mandatory. Dash usually
doesn't support such extensions. But all shells support '!', so just
that instead and you're safe.

Reference:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_13
"If an open bracket introduces a bracket expression as in XBD RE Bracket
Expression, except that the <exclamation-mark> character ( '!' ) shall
replace the <circumflex> character ( '^' ) in its role in a non-matching
list in the regular expression notation, it shall introduce a pattern
bracket expression."

- M.