Date: Mon, 2 Mar 2009 14:45:41 -0500
From: Christopher Faylor <cgf-use-the-mailinglist-please@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: job control: "set CYGWIN=tty" but ^Z doesn't work
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On Mon, Mar 02, 2009 at 07:31:54PM +0000, Andy Koppe wrote:
>2009/3/2 Daniel S.:
>>What setup is need to get ^Z to suspend the current process?
>>
>>The CygWin manual Environment Variables section at
>>http://cygwin.com/cygwin-ug-net/setup-env.html says:
>>
>>?The CYGWIN variable is used ...  [Y]ou can ...  set it to tty (e.g.
>>to support ?job control with ^Z etc...) using a syntax like this in the
>>DOS shell, before ?launching bash.
>
>You have to make sure that the CYGWIN variable is set before any Cygwin
>programs are run, because it is read when the Cygwin DLL is first
>loaded.  Exiting all Cygwin processes before invoking cygwin.bat again
>should do the trick.

That shouldn't be necessary.  The CYGWIN=tty is inherited by just one
process.  It isn't shared.

>> for (( i = 1 ; i '<' 100000 ; i = i + 1 )) ; do : ; done

Cygwin's CTRL-Z emulation isn't perfect.  It may not work well in a
scenario where you're in a tight loop in user space code which is
what the above bash loop would be.

cgf

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