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X-HELO:	drew.franken.de
Date:	Thu, 16 Feb 2017 13:49:49 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] Updated: dash-0.5.8-3
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On Feb 15 23:19, Thomas Wolff wrote:
> Am 14.02.2017 um 21:35 schrieb Thomas Wolff:
> > Am 14.02.2017 um 21:29 schrieb Thomas Wolff:
> > > Am 14.02.2017 um 20:56 schrieb Eric Blake:
> > > > On 02/14/2017 01:40 PM, Thomas Wolff wrote:
> > > > > > No.  We're talking about a function in the master side
> > > > > > of the tty, while
> > > > > > the applications started in the terminal are on the slave side.
> > > > > I am not familiar with the concept of setting termios properties =
on
> > > > > either the master or slave side of a pty. I've only ever set
> > > > > them in the
> > > > > client application, including my tests about IUTF8 which worked. =
Would
> > > > > setting on the master side imply it's set for the clients implici=
tly,
> > > > > and can it be changed later, e.g. when mintty character encoding =
is
> > > > > being changed from the Options dialog?
> > > > > And you say the function of erasing characters on BS is in the ma=
ster
> > > > > side? To be honest, this confuses me. I thought it's a
> > > > > client function,
> > > > > like readline() would perform if used (apparently not by
> > > > > dash), which is
> > > > > kind of an enhanced version of the tty cooked mode and used
> > > > > to work even
> > > > > without the new flag, right?
> > > > The readline source code does not mention IUTF8; and neither bash n=
or
> > > > dash need to reference it, because if the tty handling code sets it
> > > > correctly for what the terminal is going to display, then the clien=
ts
> > > > that are read()ing from the tty never even see BS in cooked mode (t=
he
> > > > master side of the terminal handles BS before the read() completes =
in
> > > > the slave, if I'm understanding it correctly).
> > > This does not comply with my (limited) understanding of pty stuff.
> > > In mintty, forkpty will create a master/slave pty; mintty feeds it
> > > on the master side, while the client program (usually a shell) reads
> > > from the slave side. Mintty never handles BS for input, it simply
> > > feeds it into the pty. "Line disciplines" like cooked mode must be
> > > handled on the slave side.
> > Also, I've tried both options in mintty. Setting the flag on the master
> > side has weird effects, initially blocking the terminal process.
> > Setting it on the slave side works fine.
> That was a mistake (got something wrong when testing). It works from eith=
er
> side alike.
> I've now patched mintty to keep the flag in sync with the character
> encoding, including on later changes (from Options menu or by escape
> sequence).

There's an ESC sequence to change the codeset?  Do you mean the
alternate codeset sequence \e[10m / \e[11m or is there something
more sophisticated?

Thanks,
Corinna

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

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