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Date: Sun, 19 Oct 2014 14:06:49 +0200
From: Thomas Wolff <towo@towo.net>
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To: cygwin@cygwin.com
Subject: Re: mintty: WINCH-signal to child
References: <op.xnx12ju9ofd6j1@nebbiolo.upc.de> <20141019084829.GA7649@dimstar.local.net> <op.xny2kta5ofd6j1@nebbiolo.upc.de>
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Am 19.10.2014 12:11, schrieb Helmut Karlowski:
> Am 19.10.2014, 09:48 Uhr, schrieb Duncan Roe:
>
>> bash at least has "shopt -s checkwinsize" to achieve what you want,
>
> That would be a workaround for bash. Ideally every process should 
> forward the WINCH-signal to its parent, or the terminal should walk 
> through the call-tree. Both not very likely to happen.
>
> xterm does the same as mintty BTW.
There must be something more about it:
Mined does resend a received SIGWINCH to its parent (as an application 
should indeed) and it's actually received by bash as can be confirmed 
with 'trap "echo WINCH" SIGWINCH'. Despite of the received signal bash 
does not adapt its command line width assumption (as can be checked by 
typing a long line and seeing where it wraps) (unless that option is 
enabled).
Probably a bash bug.
Same in mintty as in xterm in all cases.
Same on Linux (bash 3.2.39 on Debian on PowerPC), so not cygwin-specific.
------
Thomas

>
>
> Thanks,
>
> Helmut
>
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>
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