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Re: Find / Grep Question

From John Gordon <gordon@panix.com>
Newsgroups comp.unix.programmer
Subject Re: Find / Grep Question
Date 2011-07-07 16:28 +0000
Organization PANIX Public Access Internet and UNIX, NYC
Message-ID <iv4mrn$73c$1@reader1.panix.com> (permalink)
References <4e15d020$0$29268$c3e8da3$10cdda79@news.astraweb.com> <87oc16cda0.fsf@sapphire.mobileactivedefense.com> <4e15d513$0$4528$c3e8da3$460562f1@news.astraweb.com>

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In <4e15d513$0$4528$c3e8da3$460562f1@news.astraweb.com> Martin Crouch <spamspamspam@spaml.com> writes:

> Unfortunately that doesn't seem to work as the files have other content 
> in (they are more than one line)  so I'm assuming those lines get listed 
> by the -v option and so the file gets shown even though the file does 
> contain "dir".

Grep only cares about *lines* of text.  (Even after using unix for many
years, I have to remind myself of this fact every so often.)

The -l option is not shorthand for "evaluate the contents of the file
as a whole"; it is shorthand for "print only the filename instead of all
the matching lines."

As a result the -v and -l options tend not to work well together, because
most files will have some lines that don't contain the target text, and so
grep happily reports them.

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon@panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"

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Thread

Find / Grep Question Martin Crouch <spamspamspam@spaml.com> - 2011-07-07 16:26 +0100
  Re: Find / Grep Question Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-07-07 16:37 +0100
    Re: Find / Grep Question Martin Crouch <spamspamspam@spaml.com> - 2011-07-07 16:47 +0100
      Re: Find / Grep Question Mc <spam.mc@gmail.com> - 2011-07-07 16:49 +0100
      Re: Find / Grep Question Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-07-07 17:22 +0100
      Re: Find / Grep Question John Gordon <gordon@panix.com> - 2011-07-07 16:28 +0000
  Re: Find / Grep Question Bjarni Juliusson <bjarni@update.uu.se> - 2011-07-07 19:06 +0200
    Re: Find / Grep Question wfw <wyatt@cfa.harvard.edu> - 2011-07-07 21:59 -0700
      Re: Find / Grep Question wfw <wyatt@cfa.harvard.edu> - 2011-07-07 22:01 -0700
    Re: Find / Grep Question wfw <wyatt@cfa.harvard.edu> - 2011-07-07 22:14 -0700
      Re: Find / Grep Question Martin Crouch <spamspamspam@spaml.com> - 2011-07-08 10:04 +0100
  Re: Find / Grep Question Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-07-10 15:35 +0100

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