Re: [PATCH 3/3] fhandler_pty_slave::setup_locale: respect charset == "UTF-8"

[Corinna Vinschen <corinna-cygwin@cygwin.com>]

On Sep  8 17:16, Takashi Yano via Cygwin-patches wrote:
> On Mon, 7 Sep 2020 23:17:36 +0200 (CEST)
> Johannes Schindelin wrote:
> > Hi Takashi,
> > 
> > On Sat, 5 Sep 2020, Takashi Yano wrote:
> > 
> > > On Fri, 4 Sep 2020 08:23:42 +0200 (CEST)
> > > Johannes Schindelin wrote:
> > > >
> > > > On Fri, 4 Sep 2020, Takashi Yano via Cygwin-patches wrote:
> > > >
> > > > > On Tue, 1 Sep 2020 18:19:16 +0200 (CEST)
> > > > > Johannes Schindelin wrote:
> > > > > [...]
> > `LANG=en_US.UTF-8` (meaning your patches force their console applications'
> > output to be interpreted with code page 437) and therefore for those
> > users, things looked fine before, and now they don't.
> > 
> > Note that I am not talking about developers who develop said console
> > applications. I am talking about users who use those console applications.
> > In other words, I am talking about a vastly larger group of affected
> > people.
> > 
> > All of those people (or at least a substantial majority) will now have to
> > be told to please disable Pseudo Console support in v3.2.0 because they
> > would have to patch and rebuild those console applications that don't call
> > `SetConsoleOutputCP()`, and that is certainly unreasonable to expect of
> > the majority of users. Not even the `cmd /c chcp 65001` work-around (that
> > helps with v3.1.7) will work with v3.2.0 when Pseudo Console support is
> > enabled.
> 
> In the case where pseudo console is disabled, the patch I proposed in
> https://cygwin.com/pipermail/cygwin-patches/2020q3/010548.html
> will solve the issue. I mean apps which work correctly in cygwin 3.0.7
> work in cygwin 3.2.0 as well with that patch.
> 
> OTOH, in the case where pseudo console is enabled, non-cygwin apps which
> work correctly in command prompt, work in cygwin 3.2.0 as well.
> 
> It is enough for all, isn't it?
> 
> You may think that all non-cygwin apps which work in cygwin 3.0.7 must
> work in cygwin 3.2.0 even when pseudo console is enabled, but it is
> against the purpose of the pseudo console support. The goal of pseudo
> console support is to make non-cygwin apps work as if it is executed in
> command prompt.
> 
> By the way, you complained regarding garbled output of the program which
> outputs UTF-8 string regardless of locale.
> https://cygwin.com/pipermail/cygwin-developers/2020-August/011951.html
> However, many Japanese programmers, for example, make programs which
> output SJIS (CP932) string regardless of locale.
> 
> Why do you think the former must work while the latter deos not have to?
> Is there any reasonable reason other than backward compatibility?

Is that still a concern with the latest from master?  There's
a snapshot for testing, Johannes.

Takashi, does the patch from
https://cygwin.com/pipermail/cygwin-developers/2020-August/011951.html
still apply to the latest from master?  Question is, shouldn't the
Windows calls setting the codepage be only called if started from
child_info_spawn::worker for non-Cygwin executables?


Corinna