Re: ANN: terminfo-20160924.src.gz

[Thomas Dickey]

On Tue, Oct 25, 2016 at 04:14:26PM +0200, Mikulas Patocka wrote:
> 
> 
> On Mon, 17 Oct 2016, Thomas Dickey wrote:
> 
> > On Mon, Oct 10, 2016 at 04:42:11PM +0200, Mikulas Patocka wrote:
> > > 
> > > 
> > > On Sun, 9 Oct 2016, Thomas Dickey wrote:
> > > 
> > > > On Wed, Sep 28, 2016 at 02:19:27PM +0200, Mikulas Patocka wrote:
> > > > > 
> > > > > 
> > > > > Hi
> > > > > 
> > > > > The linux2.6 terminfo entry still contains the string 
> > > > > "enacs=\E(B\E)0", 
> > > > > which makes it unusable with iso-8859-2 locale and most other 
> > > > > one-byte 
> > > > > character sets (except iso-8859-1 and utf-8).
> > > > 
> > > > From our previous discussion, it wasn't clear to me why you cannot use
> > > > 
> > > >         # CONFIGURATION FILE FOR SETUPCON
> > > > 
> > > >         # Consult the console-setup(5) manual page.
> > > > 
> > > >         ACTIVE_CONSOLES="/dev/tty[1-6]"
> > > > 
> > > >         #CHARMAP="UTF-8"
> > > >         CHARMAP="ISO-8859-2"
> > > > 
> > > >         CODESET="Lat2"
> > > >         FONTFACE="Fixed"
> > > >         FONTSIZE="8x16"
> > > > 
> > > >         VIDEOMODE=
> > > > 
> > > >         # The following is an example how to use a braille font
> > > >         # FONT='lat9w-08.psf.gz brl-8x8.psf'
> > > 
> > > I'm using this configuration and this configuration doesn't work with 
> > > current terminfo.
> > > 
> > > You can try it - use the above configuration, run setupcon and then run
> > > LANG=cs_CZ.iso-8859-2 mc
> > > - at the bottom line, the label for key 6 should be "Presun" (with caron 
> > > over "r"), but with current terminfo, the letter r-with-caron is 
> > > corrupted 
> > > and a different character is printed.
> > 
> > not to argue (as I said, I am investigating), I don't see the problem
> > when I run this script (see attached screenshot):
> > 
> > #!/bin/sh
> > reset
> > utf8 on
> > TERM=linux3.0 \
> > LANGUAGE=cs_CZ \
> > LANG=cs_CZ.iso88592 mc
> > 
> > where "utf8" is this script
> > 
> > #!/bin/sh
> > # send character-string to enable UTF-8 mode
> > if test ".$1" = ".off" ; then
> >     printf '\033%%@'
> > else
> >     printf '\033%%G'
> > fi
> > 
> > Having seen disagreements over this (both ways), I'll continue investigating
> > until I can make a table illustrating the tradeoffs.
> 
> You took the screenshot in X-windows - but this problem manifests on the 
> console.

The screenshot was done using VMware Fusion, not an X-windows application.
If you see a difference, it's due to the way we executed the test.
I sent a script to show what I did.
 
> You must switch away from the Xserver to Linux console to see the problem. 
> If I run your script on the console, it obviously doesn't work. See this: 
> http://artax.karlin.mff.cuni.cz/~mikulas/screenshots/screenshot1.jpg
> 
> Your script has these problems:
> * the "reset" command sends "ESC c", that resets the console mapping to 
>   iso-8859-1 mode, so it breaks the iso-8859-2 character set

That's too bad.  There is no possibility that I will accept any patch that
prevents resetting the terminal (the font is one of 38 items modified, not all
of those can be reset by other means and replacing that escape with an
incomplete workaround is something that not many people would want).  If you
want to make an exception, get a feature added to the Linux console which will
reset it as you want.

The suggestion to omit the SCS B from enacs is helpful, but changing the
behavior of reset is not negotiable.

> * the "utf8 on" command switches the console to utf-8 mode, but the LANG 
>   variable is set to iso8859-2 mode, so the national characters are not 
>   displayed at all
> 
> If I remove "reset" and "utf8 on" from your script, on the Linux console, 
> I see this:
> http://artax.karlin.mff.cuni.cz/~mikulas/screenshots/screenshot2.jpg
> - you can see that the iso-8859-2 characters are broken.

thanks (more data :-)
 
> When I downgrade the ncurses-base and ncurses-term packages to version 
> "6.0+20160625-1", the iso-8859-2 characters are displayed correctly (but 
> that version has broken "linux3.0", so we should use "linux" instead):
> http://artax.karlin.mff.cuni.cz/~mikulas/screenshots/screenshot3.jpg
> 
> Mikulas

-- 
Thomas E. Dickey <address@hidden>
http://invisible-island.net
ftp://invisible-island.net

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