A simple grep command, 'grep -vf patternfile inputfile' works on Linux, but the same command doesn't work on FreeBSD-6.1. To make it work I found I had to use -F to force the interpretation of fixed-strings. I don't know why it made a difference from Linux, and nothing in the man page appears to mention why. Kind regards, Stephen Allen --
On Wed, Sep 27, 2006, Stephen Allen wrote:>A simple grep command, 'grep -vf patternfile inputfile' works on Linux, >but the same command doesn't work on FreeBSD-6.1. > >To make it work I found I had to use -F to force the interpretation of >fixed-strings. I don't know why it made a difference from Linux, and >nothing in the man page appears to mention why.Traditionally one uses ``fgrep'' for that type of matching. Bill -- INTERNET: bill@Celestial.COM Bill Campbell; Celestial Systems, Inc. UUCP: camco!bill PO Box 820; 6641 E. Mercer Way FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676 URL: http://www.celestial.com/ Government spending? I don't know what it's all about. I don't know any more about this thing than an economist does, and, God knows, he doesn't know much. -- Will Rogers
Stephen Allen <freebsduk@rowyerboat.com> wrote:
> A simple grep command, 'grep -vf patternfile inputfile' works on
Linux,
> but the same command doesn't work on FreeBSD-6.1.
Can you provide an example, please? "grep -fv" seems to
work fine for me on FreeBSD 6.1.
> To make it work I found I had to use -F to force the interpretation of
> fixed-strings. I don't know why it made a difference from Linux, and
> nothing in the man page appears to mention why.
The -F option is documented in the manual page. Without
it, patterns are interpreted as basic regular expressions.
With that option, they're interpreted as fixed string.
If Linux behaves differently, then that's a bug in Linux
rather than in FreeBSD. But then again, both Linux and
FreeBSD use GNU grep ...
Best regards
Oliver
--
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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