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Re: grep invert-match return code
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From: |
Paul Jarc |
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Subject: |
Re: grep invert-match return code |
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Date: |
Thu, 20 Apr 2006 20:25:08 -0400 |
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User-agent: |
Gnus/5.110003 (No Gnus v0.3) Emacs/21.4 (gnu/linux) |
Tavis Ormandy <address@hidden> wrote:
> $ printf "one\ntwo\nthree\n" | grep -v four; echo $?
> one
> two
> three
> 0
This is correct. -v doesn't just invert the output, it also inverts
"selection". An exit status of 0 doesn't mean that an input line
matched the regexp; it means that an input line matched the
combination of the regexp and -v.
paul