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Message-ID: <CAK4o1WyVzmgNypK8n1gQuBhxFL19KmBwXjynA+Kc+MgSz2qA5g@mail.gmail.com>
Date: Wed, 11 Jun 2014 15:24:12 +0100
From: Justin Cormack <justin@...cialbusservice.com>
To: musl@...ts.openwall.com
Subject: Re: REG_STARTEND (regex)
On Tue, Jan 15, 2013 at 3:16 PM, Daniel Cegiełka
<daniel.cegielka@...il.com> wrote:
> Thank you for your reply. It's terribly sad that there are so many
> problems with portability. There are a lot of high-quality tools in
> the *BSD, which could be used in Linux. And rather than stick to the
> POSIX people still create a barrier, like REG_STARTEND, 'sed -i',
> bison (instead POSIX yacc), perl in the Makefile(!!!) etc.
>
> 'sed -i' is used in many programs (even linux, e2fsprogs, old libcap
> etc.) and there is no chance to avoid it. So I'm looking for an
> alternative to the gnu-sed+gnulib. I found that sed from FreeBSD has
> support for -i and is much smaller than the gnu sed:
>
> http://svnweb.freebsd.org/base/release/9.1.0/usr.bin/sed/
>
> ls -lh /bin/sed ./sed
> -rwxr-xr-x 1 root root 143K Jun 22 2012 /bin/sed
> -rwxr-xr-x 1 root root 35K Jan 15 14:32 ./sed
>
> (compiled on linux with glibc)
>
> Now I want to use it with musl, but sed (and grep) from FreeBSD uses
> REG_STARTEND and I don't really know how to solve this problem.
>
>
> http://svnweb.freebsd.org/base/release/9.1.0/usr.bin/sed/process.c?revision=243808&view=markup
>
> 651 /* Set anchors */
> 652 match[0].rm_so = 0;
> 653 match[0].rm_eo = slen;
> 654
> 655 eval = regexec(defpreg, string,
> 656 nomatch ? 0 : maxnsub + 1, match, eflags | REG_STARTEND);
>
>
> Does anyone have suggestions on how this can be modified to be able to
> use it with musl.
I know this was a long time ago, but NetBSD now has (in HEAD) FreeBSD
sed modified to not use REG_STARTEND, which does compile on Musl. You
could either use the NetBSD version, or try to get FreeBSD to port the
fixes.
Justin
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