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Date: Wed, 21 Feb 2001 14:50:56 +0900
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From: "Akinori MUSHA" <knu@iDaemons.org>
To: "Daniel C. Sobral" <dcs@newsguy.com>
Cc: current@FreeBSD.ORG
Subject: Re: find(1) -regex/-iregex
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At Wed, 21 Feb 2001 14:12:51 +0900,
I wrote:
> At Wed, 21 Feb 2001 12:35:09 +0900,
> Daniel C. Sobral wrote:
> > I'm not familiar with find sources, but it seems to me you execute
> > regcomp() for each file name to be compared? If so... change that! :-)
> > Regcomp() does expensive setup so that regexec() can be run
> > inexpensively many times over.
> 
> Indeed.  I'll do it soon, thanks.

Updated.

	http://people.FreeBSD.org/~knu/misc/find_regex.diff

> > You forgot -E (use extended regexp syntax), and the example you show
> > above is extended regexp syntax, not basic regexp syntax.

Well, it was added after I had posted the original article.  The
latest one's find.1 mentions it.

	.It Fl E
	Interpret regular expressions followed by
	.Ic -regex
	and
	.Ic -iregex
	options as extended (modern) regular expressions rather than basic
	regular expressions (BRE's).  The
	.Xr re_format 7
	manual page fully describes both formats.


As for the syntax my examples conform to, I think they are valid both
for basic and extended.

	True if the whole path of the file matches
	.Ar pattern
	using regular expression.  To match a file named ``./foo/xyzzy'', you
	can use the regular expression ``.*/[xyz]*'' or ``.*/foo/.*'', but not
	``xyzzy'' or ``/foo/''.


Thanks for your suggestions.

-- 
                     /
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Akinori MUSHA aka / (_ /  ( (__(  @ iDaemons.org / and.or.jp

"We're only at home when we're on the run, on the wing, on the fly"

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