Re: grep locale off by one?

[P]

address@hidden wrote:
> What in the name of holy collating orders
> is going on below?
>
> $ echo "Z" | grep "[a-z]"
> $ echo "Y" | grep "[a-z]"
> Y
> $ echo "a" | grep "[A-Z]"
> $ echo "b" | grep "[A-Z]"
> b
>
> I know LC_ALL=C "fixes it", and I understand the collating
> order being case insensitive, but why the inconsistency,
> on the first and last characters (a and Z
> in this case). Is it an off by one? Version info follows.
>
> $ rpm -q grep glibc pcre
> grep-2.5.1-7
> glibc-2.3.2-11.9
> pcre-3.9-10
>
> $ echo $LANG
> en_IE.UTF-8

Looks like it's UTF-8 specific.
Removing this makes it behave consistently.

$ echo "Y" | LANG=en_IE.UTF-8 grep "[a-z]"
Y
$ echo "Z" | LANG=en_IE.UTF-8 grep "[a-z]"
$ echo "Y" | LANG=en_IE grep "[a-z]"
$ echo "Z" | LANG=en_IE grep "[a-z]"

Pádraig.