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Re: bug in 'cs' value of Xterm termcap (was: Updated: screen 4.1.0-20130513-1)
- From: Andrew Schulman <schulman dot andrew at epa dot gov>
- To: cygwin at cygwin dot com
- Date: Thu, 28 Nov 2013 19:25:49 -0500
- Subject: Re: bug in 'cs' value of Xterm termcap (was: Updated: screen 4.1.0-20130513-1)
- Authentication-results: sourceware.org; auth=none
- References: <1385590460 dot 84148 dot YahooMailBasic at web181501 dot mail dot ne1 dot yahoo dot com>
> For whatever reason I set my newly installed environment to use 'xterm' mode and ran across this bug.
> The archives led me to
> and specifically
> # Set the hardstatus prop on gui terms to set the titlebar/icon title
> > termcapinfo xterm*|rxvt*|kterm*|Eterm*|cygwin hs:ts=\E]0;:fs=\007:ds=\E]0;\007
> and wanted to mention that with both the -1 and -2 releases, even with the 'termcapinfo' override in the above post the hardstatus and caption lines end up 1 line off the bottom IFF $TERM=xterm be it in an honest to goodness X11 xterm or the windows terminal. This causes everything to fail to properly scroll. Once a single screen worth of output is sent, everything just gets put on the last line. This obviously is not a good thing.
> However if $TERM is any of 'cygwin', 'xterm-vt220', 'xterm-256color', 'vt100', or 'vt220' it works just fine since the offending 'cs' stanza is never set like below.
> termcap xterm|fptwist hs@:cs=\E[%i%d;%dr:im=\E[4h:ei=\E[4l
> terminfo xterm|fptwist hs@:cs=\E[%i%p1%d;%p2%dr:im=\E[4h:ei=\E[4l
> In my ~/.screenrc it was sufficient to use
> termcapinfo xterm* cs
> to restore correct behavior. Unfortunately I haven't a clue what the various escape sequences mean.
Matthew, thanks for reporting that. So far I'm not able to reproduce it.
Normally I have TERM=xterm-256color outside of screen. I reset it to
TERM=xterm and started a new instance of screen, and although I set the
hardstatus line, I can't find any problems with scrolling.
Does anyone else observe this problem? What's the proposed solution?
Remove the two lines you cited above?
See http://cygwin.com/ml/cygwin/2013-10/msg00369.html for another recent
screen scrolling issue that I couldn't reproduce.
> As a side note I think it would be a good idea to wrap all termcap|info lines with single quotes at least for consistency.
I also mostly don't have a clue what the escape sequences mean, although
I've looked up a few of them when I had to. Mostly that's deep terminal
magic, and I don't mess with it, just pass on what comes from upstream or
I'm otherwise told is needed.
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