VC_UNICODE and keyboard input
Wolfgang Oertl
echo -ne '\e%G' ; kbd_mode -u
Now the german umlauts (with codes >= 0x80) don't appear anymore. The reason
is that while the console now expects UCS2, the keyboard still emits
single-byte Latin-1 codes, which are invalid in UCS2, so nothing is displayed.
OTOH if you enter these characters using Alt-keypad, this works, because the
piece of code responsible for this (in function do_shift) respects the
VC_UNICODE setting.
The critical code is in drivers/char/keyboard.c, function "do_self". The last
line
put_queue(value);
should probably read (copied from the numberpad handling routine in do_shift):
if (kbd->kbdmode == VC_UNICODE)
to_utf8(value);
else
put_queue(value);
(data type of "value" is unsigned char)
I've actually tried that patch with 2.1.127, and it works as expected.
I realize that if the translation tables contain values < 0xf000, they are
sent using the UCS2 encoding (always...), even though I haven't found out how
to set them so with loadkeys.
(This is on an i586 PC with german keyboard layout loaded)
I don't want to send a patch because the ``bug'' is so obvious (to me ;-) that
the current behaviour could actually be the correct one.
Any opinions?
My earlier post about the elevator algorithm: I have to admit that I didn't
grok the algorithm, and that of course it works just fine... Thanks to Ben
Kosse and Stephen Tweedie for telling me that w/o flames!
HTH,
Wolfgang Oertl
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