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Date: Mon, 03 Oct 2011 18:58:59 -0400
From: Ken Brown <kbrown AT cornell DOT edu>
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Subject: Re: error while running shell in emacs
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On 10/2/2011 5:56 PM, Ken Brown wrote:
> On 10/2/2011 5:35 PM, Ken Brown wrote:
>> On 9/30/2011 3:04 PM, Ken Brown wrote:
>>> On 9/30/2011 10:27 AM, Markus Hoenicka wrote:
>>>> Hi,
>>>>
>>>> after moving to a new position I have set up a fresh Cygwin
>>>> installation:
>>>>
>>>> CYGWIN_NT-5.1 sbhc123 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
>>>>
>>>> I use some Emacs extensions which execute external programs using
>>>> (call-process). This used to work on my previous setup, but it fails on
>>>> my current box. The following command run in Emacs reproduces what
>>>> seems
>>>> to be the problem:
>>>>
>>>> (call-process "bash" nil '(t t) nil "-ic" "ls -al")
>>>> bash: Kann die Prozessgruppe des Terminals nicht setzen (-1).:
>>>> Inappropriate ioctl for device
>>>> bash: Keine Job Steuerung in dieser Shell.
>>>>
>>>> As you can see, my Cygwin also started speaking German, but I didn't
>>>> get
>>>> round to fix that yet. The messages loosely translate to: "cannot set
>>>> terminal process group" and "no job control in this shell".
>>>>
>>>> Is this an incorrect setup of either Cygwin or Emacs, or is this indeed
>>>> a problem that crept into Cygwin recently?
>>>
>>> I can reproduce this problem. It reminds me of a problem that I
>>> reported in
>>>
>>> http://cygwin.com/ml/cygwin/2011-06/msg00174.html ,
>>>
>>> but that started with the 2011-05-05 snapshot and was fixed in the
>>> 2011-06-16 snapshot. The problem you're reporting exists in Cygwin 1.7.9
>>> and persists in the latest snapshot, but with different symptoms:
>>> Instead of printing error messages, emacs hangs and has to be killed.
>>>
>>> If one of the Cygwin developers wants to look at this, here are the
>>> steps to reproduce it:
>>>
>>> 1. Start emacs.
>>> 2. Type <Ctrl-x>b<Enter>
>>>
>>> [This should put you in the *scratch* buffer.]
>>>
>>> 3. Type (or copy and paste) the following text into the *scratch*
>>> buffer:
>>>
>>> (call-process "bash" nil '(t t) nil "-ic" "ls -al")
>>>
>>> 4. With the cursor positioned immediately after the closing parenthesis,
>>> type <Ctrl-j>
>>
>> FWIW, the change in behavior (i.e., emacs hanging instead of giving an
>> error message) starts with the 2006-06-13 snapshot. And it may be
>
> Ignore the statement that it starts with the 2006-06-13 snapshot. I made
> a mistake and didn't test enough snapshots. I'll have to continue
> bisecting. All I know at the moment is that there's an error message in
> the 2011-05-10 snapshot and that the "hang" occurs in the 2011-06-13
> snapshot. There are still a lot of snapshots in between that need
> testing. Sorry for the noise.

I've finished testing snapshots.  Up through the 2011-05-20 snapshot, I 
get the error messages reported by the OP:

bash: cannot set terminal process group (-1): Inappropriate ioctl for device
bash: no job control in this shell

Starting with the 2011-05-28 snapshot, I instead get the message 
"Aborted".  Starting with the 2011-06-01 snapshot, I get the "hanging" 
behavior that I reported previously (with a stopped bash process).

There was a similar pattern in the problem I reported in

   http://cygwin.com/ml/cygwin/2011-06/msg00174.html

Ken

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