Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-Id: <200201301613.g0UGDhJ13915@phobos.space.swri.edu>
Date: Wed, 30 Jan 2002 10:10:45 -0600 (CST)
From: Joey Mukherjee <joey AT phobos DOT space DOT swri DOT edu>
Reply-To: Joey Mukherjee <joey AT phobos DOT space DOT swri DOT edu>
Subject: Problem with pipes, Cygwin 1.3.9, Win98
To: cygwin AT cygwin DOT com
MIME-Version: 1.0
Content-Type: TEXT/plain; charset=us-ascii
Content-MD5: HckSnDbfUF7KXxtKrI67BA==
X-Mailer: dtmail 1.3.0 @(#)CDE Version 1.3.5 SunOS 5.7 sun4u sparc 

Hello!

Something changed between Cygwin 1.3.6 and 1.3.9 on handling of pipes on the 
Windows 98 platform.

Here's a small Tcl code snippet:

    set pipe [open "| db_create $fileName >> $null_device" w]
    foreach value $cmds {
        puts $pipe $value
    }   
    close $pipe

$null_device is in the case of Windows, "NUL".  "db_create" is a program which 
takes its input from stdin and using Tcl, I am opening a pipe to that program.  
I will write all the cmds (which is a list of tokens) into the pipe and then 
close the pipe.  This all works on Windows 2000.  

In Windows 98, however, the pipe can not be closed and my program will hang on 
the "close $pipe" line.  This used to work on Cygwin 1.3.6.  I am not sure which 
revision broke it, but it does not work on 1.3.9.

Any suggestions?

Thanks,
Joey

+--------------------------------------------------------------------------+
+                                                                          +
+     Joey Mukherjee                 "The price of freedom is eternal      +
+     joey AT swri DOT org                   vigilance, or $12.50 as seen on      +
+                                     E-Bay...                             +
+                                                                          +
+--------------------------------------------------------------------------+



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/