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Date: Mon, 20 Feb 2017 10:11:34 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: [ANNOUNCEMENT] Updated: dash-0.5.8-3
Message-ID: <20170220091134.GB7831@calimero.vinschen.de>
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References: <6488d88d-f6b8-674d-692c-8372977a4707@redhat.com> <0da58793-0b76-1f13-aca3-06ed6aa83dc3@towo.net> <4bc220da-11d0-fd39-4691-27c6ec9cbbb8@towo.net> <59ecea04-2e3c-41af-9f4a-93a9b772a9e4@towo.net> <20170216124949.GF3889@calimero.vinschen.de> <bb2239bd-8cc3-2992-1554-18a04736ace7@towo.net> <58A6A7E0.8070500@towo.net> <20170217094302.GI3889@calimero.vinschen.de> <6bac1397-8542-8283-5146-4dffcce7c905@towo.net> <eae638e5-efec-fdd8-c690-dc16f777f409@towo.net>
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On Feb 18 23:45, Thomas Wolff wrote:
> Am 17.02.2017 um 23:29 schrieb Thomas Wolff:
> > Am 17.02.2017 um 10:43 schrieb Corinna Vinschen:
> > > On Feb 17 08:36, Thomas Wolff wrote:
> > > > Am 16.02.2017 um 21:32 schrieb Thomas Wolff:
> > > > > Am 16.02.2017 um 13:49 schrieb Corinna Vinschen:
> > > > > > There's an ESC sequence to change the codeset?  Do you mean the
> > > > > > alternate codeset sequence \e[10m / \e[11m
> > > > > Oh, that one! Thanks for mentioning, I had overlooked it and fixed
> > > > > mintty now to consider it.
> > > > > > or is there something more sophisticated?
> > > > > I actually meant to adress
> > > > > https://github.com/mintty/mintty/wiki/CtrlSeqs#locale and there is
> > > > > also \e%G and \e%@.
> > > > >=20
> > > > > I just notice that later changing of the IUTF8 flag from the mast=
er
> > > > > side does not seem to work on a Window 10 system (although it wor=
ks
> > > > > initially) while it does work on a Windows 7 system. Weird.
> > > > Now tested on 2 Windows 7 systems and 2 Windows 10 systems. Does not
> > > > work on Windows 10.
> > > > Any idea?
> Actually, I'm not sure but I think this problem only occurs if mintty is
> started in a non-UTF-8 locale.
> If it's started in UTF-8, later switching seems to work.
> The strace shows that errno is set to 88 ENOSYS at some place (but I don't
> know where).

I wonder.  Can't you just start mintty under GDB and debug what happens
in the places it calls tcgetattr/tcsetattr?  You can also see what
tcsetattr actually doe, which is, almost nothing.  At the core it
chooses the tty and just overwrites the termios structure of the tty.
That's all.  You can also see what function call returns ENOSYS then.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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