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Date:      Sat, 11 Jul 2020 23:25:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 247126] zgrep(1) does not handle -f FILE correctly
Message-ID:  <bug-247126-227-CUAHmDxtNK@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-247126-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-247126-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247126

Craig Leres <leres@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|Open                        |In Progress

--- Comment #10 from Craig Leres <leres@freebsd.org> ---
Here are some additional regressions the review has turned up (so far):

Flag processing ends after the first -e PATTERN:

    echo foobar > test

    grep -e foo -i < test
    foobar

    zgrep -e foo -i < test
    zcat: can't stat: -i: No such file or directory

This bug hides another bug; multiple -e patterns are supposed to behave
like multiple patterns in a -f file:

    echo foobar > test6
    echo howdy >> test6

    grep -e foo -e how test6
    foobar
    howdy

The zgrep wrapper only uses the last -e pattern seen.

Long flags that end with certain characters:

    echo foobar > test

    grep -e foo --ignore-case < test
    foobar

    zgrep -e foo --ignore-case < test
    zcat: can't stat: --ignore-case: No such file or directory

Long flags that take arguments are problematic as well:

    echo tiresome > test5
    grep --regexp=some  test5
    tiresome

    zgrep --regexp=some test5 < /dev/null
    test5:tiresome
    zcat: (stdin): unexpected end of file

No whitespace between a flag and its argument:

    echo foobar > test

    grep -efoo test
    foobar

    zgrep -efoo test < /dev/null
    zcat: (stdin): unexpected end of file
    test:foobar

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