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bug#6546: win32 grep/shell utf-8 encoding

From: Eli Zaretskii
Subject: bug#6546: win32 grep/shell utf-8 encoding
Date: Fri, 23 Jul 2010 17:23:47 +0300

> Date: Fri, 23 Jul 2010 15:54:34 +0300
> From: Laimonas Vėbra <address@hidden>
> CC: address@hidden
> >> The only way it works is when i set LANG process-environment variable to
> >> the current windows locale codepage and 'coding-system-for-write' to the
> >> encoding/charset in which i'd like to grep.
> >
> > That's the only way it's _supposed_ to work.
> Then i suppose it's wrong/incorrect way of what is supposed to operate 
> like that.
> Why? Because for the correct behaviour we (external app, Emacs) 
> shouldn't require to set locale to some fixed setting; it should be 
> freely changed as many cygwin apps relies on that.

You cannot easily change the locale of a Windows system by specifying
some environment variable.  You need to actually switch it
system-wide.  As long as we use ANSI APIs on Windows, we can only
support a single Windows locale, and that locale must be the current
user's locale.

> For example, how do you sort data with improper locale settings
> (which are required to be fixed)?

You can't, sorry.

> > Yes, this is the only setup that is supposed to work.
> Maybe it is/was suppose to work (at all) like that in the sense of 
> workaround, but i doubt if it was/is supposed to be correct.

It cannot work in any other way with ANSI APIs.

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