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Message-ID: <20160229191843.GG29662@port70.net>
Date: Mon, 29 Feb 2016 20:18:43 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl-mailinglist <musl@...ts.openwall.com>,
mailinglist <openwrt-devel@...ts.openwrt.org>
Subject: Re: regex issue / asterisk / musl / sed
* Szabolcs Nagy <nsz@...t70.net> [2016-02-29 14:53:48 +0100]:
> * Bastian Bittorf <bittorf@...ebottle.com> [2016-02-29 13:57:36 +0100]:
> > root@box:~ echo 'o*o' | sed -e 's/*/asterisk/g'
> > sed: bad regex '*': Invalid regexp
> > root@box:~ echo 'o*o' | sed -e 's/\*/asterisk/g'
> > oasterisko
> >
> > it's musl 1.1.14 on OpenWrt / r48814
> > both commands are working fine with glibc and uclibc
> > but the first invokation fails with musl 1.1.14 but
> > works with musl 1.1.13. unsre if the prob is on my
> > side, maybe $you have an idea...
>
> yes, i introduced this regression in
> http://git.musl-libc.org/cgit/musl/commit/?id=7eaa76fc2e7993582989d3838b1ac32dd8abac09
>
> because i missed the special * behaviour for BRE,
> but even before that ^* was broken so just reverting
> the patch is not enough, handling * after an anchor
> or assertion correctly needs more code changes.
a possible fix is attached, the handling of ^ and $
in BRE is suboptimal, but that will need a bigger
refactoring.
View attachment "0001-fix-at-the-start-of-a-BRE-subexpression.patch" of type "text/x-diff" (1137 bytes)
View attachment "0002-fix-at-the-start-of-a-complete-BRE.patch" of type "text/x-diff" (1225 bytes)
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