X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=1.5 required=5.0 tests=AWL,BAYES_50,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS
X-Spam-Check-By:	sourceware.org
Date:	Wed, 05 Oct 2011 09:03:10 +0200
Message-ID:	<20111005090310.Horde.bg2SZ1NNcXdOjAEuFfWCqTA@webmail.df.eu>
From:	Markus Hoenicka <markus DOT hoenicka AT mhoenicka DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: error while running shell in emacs
References:	<20110930162705 DOT Horde DOT SEW3ZruWis5OhdG5y5EHB8A AT webmail DOT df DOT eu> <4E8BBCD6 DOT 8030904 AT cornell DOT edu>
In-Reply-To:	<4E8BBCD6.8030904@cornell.edu>
User-Agent:	Internet Messaging Program (IMP) H4 (5.0.10)
MIME-Version:	1.0
X-Df-Sender:	bWFya3VzLmhvZW5pY2thQG1ob2VuaWNrYS5kZQ==
X-IsSubscribed:	yes
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
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

Ken Brown <kbrown AT cornell DOT edu> was heard to say:

> On 9/30/2011 10:27 AM, Markus Hoenicka wrote:
>> 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.
>
> Markus,
>
> Why are you calling bash with the -i option in this context?  Your  
> first `nil' causes bash's input to come from /dev/null.  Does it  
> make sense to have an interactive shell with input coming from  
> /dev/null?  If you remove -i and just run
>
> (call-process "bash" nil '(t t) nil "-c" "ls -al") ,
>
> it works fine with both cygwin 1.7.9 and the latest snapshot.
>
> Maybe there's still a Cygwin bug here; I tested your original  
> command in Linux, and it worked.  But omitting -i might at least be  
> a workaround for you.
>

You're asking the right question here. I tried to trace back where the  
"-ic" came from. I could find traces of this switch as early as 2004.  
It was part of a setup which allowed to use Cygwin bash as a shell in  
NTEmacs (the native GNU Emacs port, and back then the only way to have  
a GNU Emacs GUI on Windows). I'm pretty sure that I copied the switch  
from other sources, so I can't tell whether it was necessary back then  
or if the "-i" part of it simply didn't hurt. Well, it didn't hurt  
with Cygwin Emacs either until I set up my new box. But as you say,  
both "-c" and "-lc" work without a problem. Thus omitting the "-i" is  
probably not a workaround, but simply the proper way of doing things.

Thanks a lot for looking into this.

regards,
Markus


-- 
Markus Hoenicka
http://www.mhoenicka.de
AQ score 38



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

- Raw text -