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Re: The bug in the Grep Command
From: |
Jim Meyering |
Subject: |
Re: The bug in the Grep Command |
Date: |
Mon, 06 Aug 2012 13:53:32 +0200 |
address@hidden wrote:
> For example:
>
> grep -in "^$" < /etc/inittab
>
> or
> grep -in "^$" < /etc/X11/xorg.conf
Thanks again.
However, note that with that pattern or any other pattern containing
no alphabetic character, -i is useless. It may even make sense for
grep to detect the contradiction and automatically ignore that option.
Omitting the -i will not only avoid the bug in older grep versions
[2.6..2.13], but it will make your grep command significantly more
efficient, since it will not have to perform case-conversion internally.