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Re: winch trap delayed until keypress


From: Pierre Gaston
Subject: Re: winch trap delayed until keypress
Date: Thu, 22 May 2014 16:12:24 +0300

On Thu, May 22, 2014 at 4:02 PM, Linda Walsh <address@hidden> wrote:

>
>
> Pierre Gaston wrote:
>
>>
>>     As I understand it, this is now broken in 4.3?:
>>     ----
>>     # display new size of terminal when resized
>>     function showsize () {\
>>       local s=$(stty size); local o="(${s% *}x${s#* })"; s="${#o}";\
>>       echo -n $o; while ((s-- > 0));do echo -ne "\b"; done; \
>>     }
>>
>>     trap showsize SIGWINCH
>>     ----
>>
>>  As I understand it, it only affects the interactive behaviour of bash,
>> and doesn't change anything for your use case, the trap will be executed
>> when the foreground command exits.
>>
>
> ---
> If I wanted to "see" the size interactively, I wouldn't resize it unless
> I'm at the command prompt.  I.e. it will be waiting for input.
> Each time I move the corner of a tty window it displays the size
> at the point of the cursor (where the command prompt is).
>
> This allows me to dynamically see what I'm doing when I resize a window
> if I am going for a specific size (which happens usually after I've
> expanded it for some reason, and am now trying to size it back down


I don't really understand what you are saying, but if you use this trap in
a script it will work as before, if you use it in your interactive shell
and your shell is at the prompt, it will  on only be called if you press a
key.


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