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From: Hans Horn <hannes AT 2horns DOT com>
Subject: Re: Resizing a terminal window
Date: Wed, 05 May 2010 08:40:42 -0700
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On 5/5/2010 8:28 AM, J. David Boyd wrote:
> Thomas Wolff<towo AT towo DOT net>  writes:
>
>> Am 04.05.2010 16:03, schrieb J. David Boyd:
>>> ...
>>>
>>> Locally, I can use the mouse to resize a window, and the $COLUMNS and
>>> $LINES variables are automatically filled in.
>>>
>>> On many remote xterm sessions, they aren't.
>>>
>>> Does anyone have any idea where to start figuring out what is wrong, and
>>> what I can do to correct it?
>>>
>> LINES and COLUMNS are legacy mechanisms which may serve as a
>> workaround if the system doesn't otherwise handle screen size changes
>> properly. They should not be needed on modern systems where the tty
>> driver maintains the information.
>> (You may note that mintty has not set them initially but they get set
>> on resize - by whatever means... - while in a cygwin console they are
>> not used at all.)
>> So if you happen to have these variables set on a system which does
>> not maintain them, they don't get changed on resize and confuse your
>> environment. In most cases the best remedy is to just unset them -
>> does that help?
>>
>> ------
>> Thomas
>
> Sadly enough, the system I am connecting to, SUSE Linux, does use them,
> and the checkwinsize shopt BASH function, but, somehow, not
> correctly....

Just for curiosity: are you using 'expect' to log to the remote system?
If so, you'd need you modify your expect script to handle SIGWINCH 
properly. Let me know...
H.



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