Ctrl-C issue for Windows program

Ctrl-C issue for Windows program

[Wm. David Bentlage]

Hello,

I run locally-developed Windows console program via mintty/cygwin.
I've noticed a problem with Ctrl-C in mintty 1.0.3 not terminating my
app.  The problem came about with my switching to "CYGWIN_NT-5.1 pc
1.7.10(0.259/5/3) 2012-02-05 12:36 i686 Cygwin".  Ctrl-C just makes
the window hang.  /bin/kill -f cannot kill the task either.  I can
kill my Windows program via task manager.

mintty 1.0.3 and Ctrl-C on "CYGWIN_NT-5.2 server 1.7.9(0.237/5/3)
2011-03-29 10:10 i686 Cygwin" works fine.  On 1.7.10 or "CYGWIN_NT-5.2
server 1.7.13(0.260/5/3) 2012-04-05 12:43 i686 Cygwin" Ctrl-C does
not.  In addition, rxvt has the same change in Ctrl-C behavior with
the introduction of 1.7.10.

Can the functionality of Ctrl-C please be restored?

Thanks,
David

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RE: Ctrl-C issue for Windows program

[Thrall, Bryan]

Wm. David Bentlage wrote on 2012-04-13: 
> Hello,
> 
> I run locally-developed Windows console program via mintty/cygwin.
> I've noticed a problem with Ctrl-C in mintty 1.0.3 not terminating my
> app.  The problem came about with my switching to "CYGWIN_NT-5.1 pc
> 1.7.10(0.259/5/3) 2012-02-05 12:36 i686 Cygwin".  Ctrl-C just makes
> the window hang.  /bin/kill -f cannot kill the task either.  I can
> kill my Windows program via task manager.
> 
> mintty 1.0.3 and Ctrl-C on "CYGWIN_NT-5.2 server 1.7.9(0.237/5/3)
> 2011-03-29 10:10 i686 Cygwin" works fine.  On 1.7.10 or "CYGWIN_NT-5.2
> server 1.7.13(0.260/5/3) 2012-04-05 12:43 i686 Cygwin" Ctrl-C does
> not.  In addition, rxvt has the same change in Ctrl-C behavior with
> the introduction of 1.7.10.
> 
> Can the functionality of Ctrl-C please be restored?

Cygwin 1.7.12 has a fix for Ctrl-C handling:

http://cygwin.com/ml/cygwin-announce/2012-04/msg00016.html

Hope this helps!
--
Bryan Thrall
Principal Software Engineer
FlightSafety International
bryan.thrall@flightsafety.com



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Re: Ctrl-C issue for Windows program

[Wm. David Bentlage]

Bryan,

> Cygwin 1.7.12 has a fix for Ctrl-C handling:
>
> http://cygwin.com/ml/cygwin-announce/2012-04/msg00016.html

Thanks, but 1.7.13 doesn't work either.  That was a little buried in my message.

> > On 1.7.10 or "CYGWIN_NT-5.2
> > server 1.7.13(0.260/5/3) 2012-04-05 12:43 i686 Cygwin" Ctrl-C does
> > not.

My issue started with 1.7.10 and remains the same in 1.7.13.

David

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Re: Ctrl-C issue for Windows program

[Christopher Faylor]

On Fri, Apr 13, 2012 at 02:59:18PM -0500, Wm. David Bentlage wrote:
>On Fri, Apr 13, 2012 at 02:49:07PM -0500, Thrall, Bryan wrote:
>>Cygwin 1.7.12 has a fix for Ctrl-C handling:
>>
>>http://cygwin.com/ml/cygwin-announce/2012-04/msg00016.html
>
>Thanks, but 1.7.13 doesn't work either.  That was a little buried in my
>message.
>
>>>On 1.7.10 or "CYGWIN_NT-5.2 server 1.7.13(0.260/5/3) 2012-04-05 12:43
>>>i686 Cygwin" Ctrl-C does not.
>
>My issue started with 1.7.10 and remains the same in 1.7.13.

Does today's snapshot (when it shows up) work any better?

http://cygwin.com/snapshots/

cgf

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Re: Ctrl-C issue for Windows program

[Wm. David Bentlage]

Christopher,

>>My issue started with 1.7.10 and remains the same in 1.7.13.
>
> Does today's snapshot (when it shows up) work any better?

I tried cygwin-inst-20120415.tar.bz2.

$ uname -a
CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3) 20120415 17:52:03 i686 Cygwin

The issue remains the same.

Thanks,
David

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Re: Ctrl-C issue for Windows program

[Christopher Faylor]

On Mon, Apr 16, 2012 at 12:57:09PM -0500, Wm. David Bentlage wrote:
>Christopher,
>
>>>My issue started with 1.7.10 and remains the same in 1.7.13.
>>
>> Does today's snapshot (when it shows up) work any better?
>
>I tried cygwin-inst-20120415.tar.bz2.
>
>$ uname -a
>CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3) 20120415 17:52:03 i686 Cygwin
>
>The issue remains the same.

Could you recount the actual issue then using off-the-shelf Windows
commands as found in windows\system32 ?

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Re: Ctrl-C issue for Windows program

[Wm. David Bentlage]

On Tue, Apr 17, 2012 at 9:48 AM, Christopher Faylor wrote:
> On Mon, Apr 16, 2012 at 12:57:09PM -0500, Wm. David Bentlage wrote:
>>Christopher,
>>
>>>>My issue started with 1.7.10 and remains the same in 1.7.13.
>>>
>>> Does today's snapshot (when it shows up) work any better?
>>
>>I tried cygwin-inst-20120415.tar.bz2.
>>
>>$ uname -a
>>CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3) 20120415 17:52:03 i686 Cygwin
>>
>>The issue remains the same.
>
> Could you recount the actual issue then using off-the-shelf
> Windows commands as found in windows\system32 ?

Here are a couple approaches.

1) On my Windows server 2003 system:

CYGWIN_NT-5.2 server 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin

Execute the following in a mintty window at a bash prompt:

$ C:/winnt/system32/help sc

This prompts with "Would you like to see help for the QUERY and
QUERYEX commands? [ y | n ]:"

Pressing Ctrl-C terminates the query and returns to the bash prompt.
On the same server using CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3)
20120415 17:52:03 i686 Cygwin, Ctrl-C leaves me with a hung window.

2) I can achieve a similar effect by the following process.

In an mintty window at a bash prompt:

$ cmd
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\>date
date
The current date is: Tue 04/17/2012
Enter the new date: (mm-dd-yy)

Pressing Ctrl-C using 1.7.9 returns me to a bash prompt, using 1.7.14s
leaves me with a hung window.

I can repeat 2) on XP with 1.7.9 and 1.7.10.  Specifically, these versions:

CYGWIN_NT-5.1 pc 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
CYGWIN_NT-5.1 pc 1.7.10(0.259/5/3) 2012-02-05 12:36 i686 Cygwin

David

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Re: Ctrl-C issue for Windows program

[Christopher Faylor]

On Tue, Apr 17, 2012 at 04:24:31PM -0500, Wm. David Bentlage wrote:
>On Tue, Apr 17, 2012 at 9:48 AM, Christopher Faylor wrote:
>> On Mon, Apr 16, 2012 at 12:57:09PM -0500, Wm. David Bentlage wrote:
>>>Christopher,
>>>
>>>>>My issue started with 1.7.10 and remains the same in 1.7.13.
>>>>
>>>> Does today's snapshot (when it shows up) work any better?
>>>
>>>I tried cygwin-inst-20120415.tar.bz2.
>>>
>>>$ uname -a
>>>CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3) 20120415 17:52:03 i686 Cygwin
>>>
>>>The issue remains the same.
>>
>> Could you recount the actual issue then using off-the-shelf
>> Windows commands as found in windows\system32 ?
>
>Here are a couple approaches.
>
>1) On my Windows server 2003 system:
>
>CYGWIN_NT-5.2 server 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
>
>Execute the following in a mintty window at a bash prompt:
>
>$ C:/winnt/system32/help sc
>
>This prompts with "Would you like to see help for the QUERY and
>QUERYEX commands? [ y | n ]:"
>
>Pressing Ctrl-C terminates the query and returns to the bash prompt.
>On the same server using CYGWIN_NT-5.2 server 1.7.14s(0.260/5/3)
>20120415 17:52:03 i686 Cygwin, Ctrl-C leaves me with a hung window.
>
>2) I can achieve a similar effect by the following process.
>
>In an mintty window at a bash prompt:
>
>$ cmd
>Microsoft Windows [Version 5.2.3790]
>(C) Copyright 1985-2003 Microsoft Corp.
>
>C:\>date
>date
>The current date is: Tue 04/17/2012
>Enter the new date: (mm-dd-yy)
>
>Pressing Ctrl-C using 1.7.9 returns me to a bash prompt, using 1.7.14s
>leaves me with a hung window.
>
>I can repeat 2) on XP with 1.7.9 and 1.7.10.  Specifically, these versions:
>
>CYGWIN_NT-5.1 pc 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
>CYGWIN_NT-5.1 pc 1.7.10(0.259/5/3) 2012-02-05 12:36 i686 Cygwin

Thanks for the test case.  Yes, I got the fact that it worked better in
older versions.  No need to keep stressing that.

cgf

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