"display charset" vs. Unix locales

Michael B Allen mba2000 at ioplex.com
Sun Jun 1 04:30:18 GMT 2003

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

> > Actually it will probably say ISO-8859-1.
> If anything ever says that in the *C* locale, it's a bug.

In the C locale sure.


A  program should be written to model the concepts of the task it
performs rather than the physical world or a process because this
maximizes  the  potential  for it to be applied to tasks that are
conceptually  similar and, more important, to tasks that have not
yet been conceived. 

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