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Date:   Mon, 19 Jul 2021 13:13:28 +0800
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Dimitar Yurukov <mscalindt@gmail.com>
Cc:     mscalindt@gmail.com, dash@vger.kernel.org, harald@gigawatt.nl
Subject: Re: [PATCH v2] expand: Recognize '^' as a negation character in BE
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Dimitar Yurukov <mscalindt@gmail.com> wrote:
> While performing bracket expression ('[...]'), DASH recognizes only '!'
> as a special character for negation/inversion, but POSIX specifies '^'.
> 
> The specification (2018 edition):
> "
> 9.3.3 BRE Special Characters
> 
> ^ The <circumflex> shall signify a non-matching list expression when it
>  occurs first in a list, immediately following a <left-square-bracket>
>  (see RE Bracket Expression).
> "

This is incorrect and ^ cannot be used in a portable script.

Cheers,
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
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