"display charset" vs. Unix locales

[Steve Langasek]

On Sun, Jun 01, 2003 at 12:30:18AM -0400, Michael B Allen wrote:
> On Sat, 31 May 2003, Steve Langasek wrote:
> > > > One curious side-effect is that the default for display charset is
> > > > "ASCII", but glibc's nl_langinfo() returns "ANSI_X3.4-1968" as the
> > > > character set for the C locale.  This results in C locale conversions
> > 
> > > This is because you must first initialize the locale with
> > > setlocale(LC_CTYPE, ""). Then it will say ASCII.
> > 
> > See the patch. Glibc does *not* use the name "ASCII" for this character
> > set -- this is known.  The side-effect is that changing the name of the
> > character set results in different handling by Samba, which recognizes
> > "ASCII" as a special name and processes it internally.

> If the locale specified in the environment is used and you set it with
> setlocale(LC_CTYPE, "") it is conceivable that nl_langinfo will return
> "ASCII". I still have a Redhat 5.2 system that does this.

Really?  I guess glibc has changed a bit over the years. :)  On my glibc
2.3-based systems, there are no locales that return "ASCII" as the
canonical character set name.

> I should have realized that your code depends on the locale samba is
> running in which you are saying is the C locale?

Tested in several locales (ASCII, ISO8859-1, UTF8), for completeness.

> In this case it will return "ANSI_X3.4-1968". I don't know a lot about
> samba so I didn't think looking at your patch would help. I just
> thought you were trying to get from "ANSI_X3.4-1968" to "ASCII" and I
> knew how to do that...

But really, the only way to get from the one to the other in this case
is if Samba knows about both names.

Cheers,
-- 
Steve Langasek
postmodern programmer
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