Date: Fri, 15 Sep 2006 09:21:17 -0700 From: Zak Johnson <zakj@nox.cx> To: Volodymyr Kostyrko <arcade@synergetica.dn.ua> Cc: freebsd-standards@freebsd.org Subject: Re: find regular expression question Message-ID: <20060915162117.11445.qmail@nox.cx> In-Reply-To: <450AA821.9050000@synergetica.dn.ua> References: <450AA821.9050000@synergetica.dn.ua>
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Volodymyr Kostyrko wrote:
> Just stumbled upon some inconsistences in find(1) regular expressions
> parsing:
>
> [code]
> > :>a
> > find . -regex '^\./a\?$'
> > find . | grep '^\./a\?$'
> ./a
> [/code]
Find uses basic (obsolete) regular expressions by default; '?' is an
ordinary character. You can use either of the following instead:
find . -regex '^\./a\{0,1\}$'
find -E . -regex '^\./a?$'
find's '-E' option makes -regex use the extended regular expression
syntax, documented in re_format(7). GNU grep uses its own---slightly
different---re syntax, described in grep(1).
-Zak
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