X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-2.4 required=5.0 tests=AWL,BAYES_00
X-Spam-Check-By:	sourceware.org
Message-ID:	<4B976EB6.3030704@towo.net>
Date:	Wed, 10 Mar 2010 11:04:38 +0100
From:	Thomas Wolff <towo AT towo DOT net>
User-Agent:	Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.8) Gecko/20100227 Lightning/1.0b1 Thunderbird/3.0.3
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: redirect-append (>>) creates garbage-y file
References:	<01499D518A9B6F4493FC5A2D32F7A4FC51B519F1C9 AT MB-EXBX01 DOT north DOT pf DOT com> <01499D518A9B6F4493FC5A2D32F7A4FC51B52C97B2 AT MB-EXBX01 DOT north DOT pf DOT com>
In-Reply-To:	<01499D518A9B6F4493FC5A2D32F7A4FC51B52C97B2@MB-EXBX01.north.pf.com>
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

On 09.03.2010 20:41, William Lebow wrote:
> I've diagnosed this problem further. It is an interaction between cygwin and a security package called "Credant Guardian Shield" that my company installs on all of its laptops. I can't say specifically that it is a cygwin bug, but this bad behavior is not present in earlier versions.
>
> As described below, the problem is a command like "echo foo>>  foo.txt" creates a file that starts with a bunch of garbage, and ends with the expected text.
>    
It would be interesting to check whether it only occurs if you append to 
a file from the command line or also if an application opens a file in 
append mode,
in which case the issue would be much more critical I think.
In any case, I would also submit a bug report to that security package.
------
Thomas
>   -- Bill
>
>
>
> -----Original Message-----
> From: William Lebow [mailto:William DOT Lebow AT phaseforward DOT com]
> Sent: Sunday, March 07, 2010 2:58 PM
> To: cygwin AT cygwin DOT com
> Cc: blebow AT alum DOT mit DOT edu
> Subject: redirect-append (>>) creates garbage-y file
>
> I'm a long time cygwin user, but I am having the weirdest problem after installing on my new Dell laptop running Windows XP professional. I'd be grateful for any advice or hints from this group.
>
> I am doing a simple redirect-append (>>, that is) to create a new file. When I do this the new file has twice as many characters as I expect and the first bunch of characters are seemingly garbage.
>
> This only happens with ">>" and only if I am creating a new file.
> Using ">>" to append to a file is no problem.
> Using ">" to create a new file is not problem
>
> So far this has not been reproducable on any other PC.
>
> I am using the bash version 3.2.49(23)-release (i686-pc-wygwin) , with the 1007.1.0.0 cygwin1 dll-- see attached output from cygcheck.
>
> Some examples follow::
>
> #################################
> #### Example 1
> #### I expect 4 characters (including the terminator); I get 7 #### The first 3 characters are unwanted
>    $ echo abc>>  test1.txt
>    $ wc test1.txt
>    1 1 7 test1.txt
>    $ cat test1.txt
>    0‘‘abc
>
> $ hexedit test1.txt
> 00000000   30 B5 A2 61  62 63 0A                                            0..abc.
>
> #################################
> #### Example 2
> #### I expect 8 characters (including the terminator); I get 15 #### The first 7 characters are unwanted
>    $ echo abcdefg>>  test2.txt
>    $ wc test2.txt
>     1  1 15 test2.txt
>    $ cat test2.txt
>    ‘‘\zB‘‘abcdefg
>
> hexedit test2.txt
> 00000000   AD EB 5C 7A  42 B6 C5 61  62 63 64 65  66 67 0A                  ..\zB..abcdefg.
>
>
> #################################
> #### Example 3
> #### Use>  instead of>>  and I get exactly what I should get
>    $ echo abc>  test3.txt
>    $ wc test3.txt
>    1 1 4 test3.txt
>    $ cat test3.txt
>    abc
>
>
>
> Many thanks for any help
>
>   -- Bill
>
> --
> 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
>
>    


--
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 -