Date: Thu, 15 Jul 2021 23:29:04 GMT From: Warner Losh <imp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 3e8044635219 - stable/13 - awk: revert upstream's attempt to disallow hex strings Message-ID: <202107152329.16FNT4Xx014350@gitrepo.freebsd.org>
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The branch stable/13 has been updated by imp: URL: https://cgit.FreeBSD.org/src/commit/?id=3e8044635219ecc467165d0fd020df03ec02ff2c commit 3e8044635219ecc467165d0fd020df03ec02ff2c Author: Warner Losh <imp@FreeBSD.org> AuthorDate: 2021-07-15 22:46:06 +0000 Commit: Warner Losh <imp@FreeBSD.org> CommitDate: 2021-07-15 23:28:37 +0000 awk: revert upstream's attempt to disallow hex strings Upstream one-true-awk decided to disallow hex strings as numbers. This is in line with awk's behavior prior to C99, and allowed by the POSIX standard. The standard, however, allows them to be treated as numbers because that's what the standard said in the 2001 through 2004 editions. Since 2001, the nawk in FreeBSD has treated them as numbers, so restore that behavior, allowed by the standard. A number of scripts in the FreeBSD tree depend on this interpretation, including scripts to build the kernel which had mysteriously started failing for some people and not others. By re-allowing 0x hex numbers, this fixes those scripts and restores POLA. Upstream issue: https://github.com/onetrueawk/awk/issues/126 Sponsored by: Netflix Reviewed by: kevans MFC After: asap due to regression alrady merged to stable Differential Revision: https://reviews.freebsd.org/D31199 (cherry picked from commit d4d252c49976de33d0a2926df733744d0b8d95fa) --- contrib/one-true-awk/lib.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/contrib/one-true-awk/lib.c b/contrib/one-true-awk/lib.c index 18adbd2d1fd6..6bfe5e8eaad9 100644 --- a/contrib/one-true-awk/lib.c +++ b/contrib/one-true-awk/lib.c @@ -793,9 +793,18 @@ bool is_valid_number(const char *s, bool trailing_stuff_ok, while (isspace(*s)) s++; +/* + * This test, while allowed by newer POSIX standards, represents a regression + * where hex strings were treated as numbers in nawk the whole time it has been + * in FreeBSD (since 2001). The POSIX 2001 through 2004 standards mandated this + * behavior and the current standard allows it. Deviate from upstream by restoring + * the prior FreeBSD behavior. + */ +#if 0 // no hex floating point, sorry if (s[0] == '0' && tolower(s[1]) == 'x') return false; +#endif // allow +nan, -nan, +inf, -inf, any other letter, no if (s[0] == '+' || s[0] == '-') {
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