X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
To: cygwin AT cygwin DOT com
From: Jared <jkstill AT gmail DOT com>
Subject:  Redirecting standard output problem
Date: Tue, 10 Jun 2008 19:16:26 +0000 (UTC)
Lines: 21
Message-ID:  <loom.20080610T191205-689@post.gmane.org>
Mime-Version:  1.0
Content-Type:  text/plain; charset=us-ascii
Content-Transfer-Encoding:  7bit
User-Agent: Loom/3.14 (http://gmane.org/)
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


I've run into something using Cygwin that was rather unexpected.

When redirecting stdout to a file with a program such as vmstat, 
the output is buffered in 64k chunks.

No output appears until 64k of output has been produced.

This was verified with a Perl script to see at what point output appears 
in a file.

So a command such as this:  vmstat 20 > vmstat.log

is going to take a very long time to put anything in the output file.

Unlike unix or linux, CTL-C does not flush the buffer to disk, 
the output just disappears.

Is there some way to change this behavior?




--
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/