Cygwin 1.7 string pattern matching problem with case sensitivity

[Greg Chicares]

On 2011-03-17 12:44Z, jean-benoit.ouellet@HIDDEN.ca wrote:
>
> I just upgraded Cygwin from 1.5.21-2 to 1.7.8-1 and I'm getting problems with case sensitivity.
> Let's assume that 'file.csv' contains these 2 lines:
> Hello, 123
> hello, 456 
>
> The following commands will output both lines instead of the desired first line only:
> awk -F, '$1 ~ /^[A-Z]/ {print $0}' file.csv
> grep "^[A-Z]/" file.csv

Either override the locale
  http://www.cygwin.com/cygwin-ug-net/setup-locale.html
or, preferably, use character classes, e.g.:

$grep '^[[:upper:]]' file.csv
Hello, 123

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