[Bug 247126] zgrep(1) does not handle -f FILE correctly

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

Craig Leres <leres at freebsd.org> changed:

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 Attachment #215407|0                           |1
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--- Comment #2 from Craig Leres <leres at freebsd.org> ---
Created attachment 215428
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=215428&action=edit
revised patch

I see now the wrapper script fails when the flags are not discrete:

    # Works
    % fgrep -we RELEASE /etc/motd
    FreeBSD 12.1-RELEASE-p3 GENERIC

    # Fails
    % zfgrep -we RELEASE /etc/motd
    grep: RELEASE: No such file or directory

This updated patch takes advantage of the fact that "extra argument" flags must
come last. It also lets "-e PATTERN" pass through to *grep with other flags
instead of moving the pattern to the end.

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