Date: Thu, 11 Feb 2021 15:21:56 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 253209] grep -v -f some-empty-file -- does the wrong thing Message-ID: <bug-253209-227-v8UveBZBDB@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-253209-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253209 --- Comment #5 from commit-hook@FreeBSD.org --- A commit in branch stable/12 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=92ddb6090b0c5091a64855a514676a452c10750c commit 92ddb6090b0c5091a64855a514676a452c10750c Author: Kyle Evans <kevans@FreeBSD.org> AuthorDate: 2021-02-04 21:26:45 +0000 Commit: Kyle Evans <kevans@FreeBSD.org> CommitDate: 2021-02-11 15:19:26 +0000 grep: fix null pattern and empty pattern file behavior The null pattern semantics were terrible because I tried to match gnugrep, but I got it wrong. Let's unwind that: - The null pattern should match every line if neither -w nor -x. - The null pattern should match empty lines if -x. - The null pattern should not match any lines if -w. The first two will stop processing (shortcut) even if additional patterns are specified. In any other case, we will continue processing other patterns. If no other patterns are specified beside a null pattern, then we match if neither -w nor -x or set and do not match if either of those are specified. The justification for -w is that it should match on a whole word, but the null pattern deos not have a whole word to match on. Empty pattern files should never match anything, and more importantly, -v should cause everything to be written. PR: 253209 (cherry picked from commit f823c6dc730b0dd08b54a53be1d8fd587eee7021) contrib/netbsd-tests/usr.bin/grep/t_grep.sh | 22 +++++++++++++++--- usr.bin/grep/grep.c | 11 --------- usr.bin/grep/util.c | 35 +++++++++++++---------------- 3 files changed, 35 insertions(+), 33 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug.help
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