X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=3.5 required=5.0 tests=AWL,BAYES_00,BOTNET,RCVD_IN_DNSWL_NONE
X-Spam-Check-By:	sourceware.org
Message-id:	<4EE2B978.8080702@cygwin.com>
Date:	Fri, 09 Dec 2011 20:44:24 -0500
From:	"Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
Reply-to:	cygwin AT cygwin DOT com
User-Agent:	Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0
MIME-version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: stdout output missing, but redirecting works
References:	<CAGVbXL7pXn5BZSNXNJKMTbGUOQzAhGBOZwxdsPGa-bucQf6dBg AT mail DOT gmail DOT com> <4EE27335 DOT 9070106 AT cygwin DOT com> <CAGVbXL5_rPrPGK8Z8Yfr0yKyqCOSOgoXX6keNEG_7igKh_Y6eA AT mail DOT gmail DOT com>
In-reply-to:	<CAGVbXL5_rPrPGK8Z8Yfr0yKyqCOSOgoXX6keNEG_7igKh_Y6eA@mail.gmail.com>
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

On 12/9/2011 7:12 PM, Brian Craft wrote:
> On Fri, Dec 9, 2011 at 12:44 PM, Larry Hall (Cygwin) wrote:
>> On 12/9/2011 2:47 PM, Brian Craft wrote:
>>>
>>> I compiled a program yesterday which output some lines to stdout. It
>>> appeared to be working. Running it today, I get nothing on stdout.
>>> However, if I redirect stdout to a file, the correct output appears in
>>> the file. E.g.
>>>
>>> # no output
>>> ./foo
>>> # "hello world" in bar
>>> ./foo>    bar
>>>
>>>
>>> In between yesterday and today, I've rebooted and run rebaseall, so
>>> perhaps one of those is responsible for the change.
>>>
>>> Any suggestions?
>>
>>
>> Sounds like buffering to me.  Is this program compiled with Cygwin's gcc
>> or something else?  What kind of terminal are you running it in?  Same one
>> as yesterday?
>
> Cygwin's g++. The default cygwin terminal.
>
> Another bit of data: if I explicitly redirect the output to /dev/tty0,
> I also get no output. E.g.
>
> # outputs "hello"
> echo hello>  /dev/tty0
> # no output
> ./foo>  /dev/tty0

Then my next WAG is BLODA - <http://cygwin.com/acronyms/#BLODA>.  If that's
not it, I recommend a full report - <http://cygwin.com/problems.html>.

-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

--
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 -