NetBSD Problem Report #45221

From dholland@macaran.localdomain  Sun Aug  7 05:38:40 2011
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Date: Sun,  7 Aug 2011 00:21:27 -0400 (EDT)
Subject: xterm utf-8 mode is (partially) a one-way trip
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>Number:         45221
>Category:       pkg
>Synopsis:       xterm utf-8 mode is (partially) a one-way trip
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Aug 07 05:40:00 +0000 2011
>Originator:     David A. Holland
>Release:        NetBSD 5.99.49 (pkgsrc from 20110730)
System: NetBSD macaran 5.99.49 NetBSD 5.99.49 (MACARAN) #8: Mon Apr 11 19:54:18 EDT 2011 dholland@macaran:/usr/src/sys/arch/amd64/compile/MACARAN amd64
Architecture: x86_64
Machine: amd64

xterm-259 from pkgsrc X has the following problem:

If you
  - start it in non-utf-8 mode
  - switch to utf-8 mode with the ctrl-rightmouse menu
  - do some stuff
  - switch back to normal mode with the ctrl-rightmouse menu

then only output handling and not input handling switches back away
from utf-8. That is, if you print characters 128-255 from programs,
they're displayed as the matching iso-latin-1 glyphs; but if you paste
characters 128-255 into the xterm they are converted to utf-8 on the
way in and programs read them as multibyte sequences. This conversion
is apparently enabled when utf-8 mode is switched on, but not disabled
again when it's switched off.


prepare something suitable in your cut buffer, open a fresh xterm, and
paste into cat as follows:

	% cat | hexdump -C
	<correct glyph>
	00000000  d8 0a                                             |..|

switch on utf-8 mode:

	% cat | hexdump -C
	<correct glyph>
	00000000  c3 98 0a                                          |...|

switch off utf-8 mode:

	% cat | hexdump -C
	<wrong glyph>
	00000000  c3 98 0a                                          |...|


	dunno, probably obvious if you know where to look, which I don't.

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