Date: Fri, 9 Jul 2021 02:27:48 -0600 From: Warner Losh <imp@bsdimp.com> To: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: FreeBSD awk behavior change proposal Message-ID: <CANCZdfq8HrGUcFe8n=p2scpw3rHPkZTxu8XK27uFi=4w7DBhow@mail.gmail.com>
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--0000000000009c68a405c6ac8ca7 Content-Type: text/plain; charset="UTF-8" Greetings, I've posted https://reviews.freebsd.org/D31114 which eliminates the last delta we have from upstream one-true-awk. This delta has basically been rejected by upstream as being a really bad idea. Let me give some background. In 2005, FreeBSD changed one-true-awk to honor the locale's collating order. https://svnweb.freebsd.org/base/head/usr.bin/awk/b.c.diff?annotate=146322&pathrev=201988 This was billed as a temporary patch. It was also compatible with the then-current behavior of gawk. That temporary patch has lasted 16 years now. However, IEEE Std 1003.1-2008 changed the behaivor of ranges in regular expressions outside of the "C" and "POSIX" locales to be undefined. Starting in 2011, gawk 4.0 stopped using the locale for the range regular expressions and used the traditional behavior only. The maintainer had grown weary of answering why '[A-Z]' would sometimes match lower-case expressions. The details about are explained here: https://www.gnu.org/software/gawk/manual/html_node/Ranges-and-Locales.html To restore compatibility with other implementaitons of awk, revert this patch. FreeBSD is the odd-system out. It also has the nice side effect of eliminating the last of our differences with upstream one-true-awk. I'd like to commit the change at least to -current. Ideally, I'd like to MFC the change. I believe better compatibility with gawk and other awk implementations justifies this change in behavior because the current behavior is outside the mainstream enough to be considered a bug. I'd like to solicit input before I do this, however. Warner --0000000000009c68a405c6ac8ca7--
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