Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <40CFD6E5.1070709@luukku.com>
Date: Wed, 16 Jun 2004 08:13:09 +0300
From: Jani tiainen <redetin AT luukku DOT com>
User-Agent: Mozilla Thunderbird 0.7a (Windows/20040612)
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: Ctrl-Z fails to suspend Windows programs
References: <87n035b3kn DOT fsf AT eu DOT citrix DOT com> <20040615120142 DOT GA30776 AT trixie DOT casa DOT cgf DOT cx> <40CEED71 DOT 7020407 AT luukku DOT com> <20040615131311 DOT GB30776 AT trixie DOT casa DOT cgf DOT cx>
In-Reply-To: <20040615131311.GB30776@trixie.casa.cgf.cx>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes

Christopher Faylor wrote:
> On Tue, Jun 15, 2004 at 03:37:05PM +0300, Jani tiainen wrote:
> 
>>Christopher Faylor wrote:
>>
>>>On Tue, Jun 15, 2004 at 09:58:16AM +0100, John Cooper wrote:
>>>
>>>>Is it a known limitation that "native" Windows programs cannot be
>>>>suspended?
>>>
>>>Yes.  Window programs do not understand cygwin signals.
>>
>>Thats true for cygwin part.  Native programs still can be
>>suspended/resumed but not by cygwin (or shell that is running and
>>waiting finishing of active process).
> 
> 
> It is true for any part that Windows programs do not understand cygwin
> signals.
> 
> There is no way to reliably suspend a Windows programs.

Yes there is ( piece of pseudo code):

For Each Thread THREAD_Y in Process PROCESS_X
	Call_Win32API SuspendThread(THREAD_Y.Handle)
Next

NOTE: In Win2k and later you need THREAD_SUSPEND_RESUME rights for 
particular thread.

-- 

Jani Tiainen

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/