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Re: built-in regex matches wrong character

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  Re: built-in regex matches wrong character Chet Ramey <chet.ramey@case.edu> - 2018-09-06 10:13 -0400

#14552 — Re: built-in regex matches wrong character

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/

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