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Re: built-in regex matches wrong character
From: |
Chet Ramey |
Subject: |
Re: built-in regex matches wrong character |
Date: |
Thu, 6 Sep 2018 10:13:45 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
On 9/5/18 2:50 PM, mamatb@mamatb-laptop wrote:
> Bash Version: 4.4
> Patch Level: 0
> Release Status: release
>
> Description:
> It seems like bash built-in regex matches some symbols that shouldn't.
There are a couple of things to consider here.
1. Bash doesn't have a "built-in" regexp engine. It uses whatever POSIX-
compatible regexp API the C library provides.
2. POSIX range expressions are explicitly non-portable and locale-
dependent. The characters in a range depend on the locale's collation
sequence. Look back at this list for discussions of how upper and
lower case letters get into a range like a-z.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
Re: built-in regex matches wrong character,
Chet Ramey <=