Re: LC_COLLATE not used for filename expansion

[Chet Ramey]

Chris F.A. Johnson wrote:
> With LC_COLLATE set to a locale with case-insensitive collation,
> filename expansion does not use the locale. It does with LC_ALL.
>
> In an empty directory:
>
> $ touch a B c D e F
> $ echo *
> B D F a c e
> $ LC_COLLATE=en_us
> $ echo *
> B D F a c e
> $ LC_ALL=en_us
> $ echo *
> a B c D e F

It is, in fact, used to sort the results of filename expansion (as long
as strcoll is present and understands locales).  It seems like `en_us' is
not a valid locale value to assign to LC_COLLATE, but works with LANG.

Here's what I get with a slightly-instrumented bash:

$ cat x4
unset LC_COLLATE LC_ALL
echo LANG = $LANG
LC_COLLATE=C
cd scratch
touch a B c D e
echo *
LC_COLLATE=en_us
echo *
unset LC_COLLATE
LANG=en_us
echo *
LANG=C
LC_COLLATE=en_US.UTF-8
echo *
$ ./bash ./x4
LANG = en_US.UTF-8
TRACE: pid 25971: shell_glob_filename: LC_COLLATE = C
B D a c e
./x4: line 7: warning: setlocale: LC_COLLATE: cannot change locale (en_us): 
No such file or directory
TRACE: pid 25971: shell_glob_filename: LC_COLLATE = C
B D a c e
TRACE: pid 25971: shell_glob_filename: LC_COLLATE = en_US.UTF-8
a B c D e
TRACE: pid 25971: shell_glob_filename: LC_COLLATE = en_US.UTF-8
a B c D e

(FWIW, this is on ubuntu linux.)

Chet

--
``The lyf so short, the craft so long to lerne.'' - Chaucer

Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/