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Re: grep bug? or wrong functionality?
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From: |
Paul Jarc |
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Subject: |
Re: grep bug? or wrong functionality? |
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Date: |
Wed, 22 Jan 2003 13:21:48 -0500 |
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User-agent: |
Gnus/5.090011 (Oort Gnus v0.11) Emacs/21.2 (i686-pc-linux-gnu) |
"Subhakar Burri" <address@hidden> wrote:
> url2:#ROOT#:/apps/ctr/tables> cat /tmp/chaz
> 010103
> 010903
> 011103
>
> url2:#ROOT#:/apps/ctr/tables> cat /tmp/chaz | egrep 010?03
> 010103
>
> (should have matched "010903" as well)
No, the result is correct. egrep uses regular expressions, not shell
wildcards. You should use "." instead of "?" to get what you want.
> url2:#ROOT#:/apps/ctr/tables> cat /tmp/chaz | egrep 01*03
Use ".*" instead of "*".
You should also quote command-line arguments containing shell
wildcards. Otherwise, the shell will replace the argument with a list
of filenames matching that pattern, and grep will use the first
filename as a regular expression.
paul