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Date: Sat, 04 Dec 2010 01:20:28 +0000
From: Greg Chicares <gchicares AT sbcglobal DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: Problem with Bash regex test case sensitivity
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On 2010-12-03 22:30Z, Lee Rothstein wrote:
[script:]
> if [[ "$1" =~ [A-Z] ]] ; then
>      echo Contains Capital Letters: $1
> else
>      echo Doesn\'t Contain Capital Letters: $1
> fi
[...]
> # WTF, O
> $ t_regex dfgh
> Contains Capital Letters: dfgh

Inspect this option:
  shopt -p | grep nocasematch
Perhaps you have it set in your startup files?

Example of different 'nocasematch' settings with the same command:

$ shopt -u nocasematch
$ if [[ "a" =~ [A-Z] ]] ; then echo UPPER; else echo lower; fi
lower

$ shopt -s nocasematch
$ if [[ "a" =~ [A-Z] ]] ; then echo UPPER; else echo lower; fi
UPPER

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