Re: cmd.exe bug in win2k sp4 in "for" loop ... erratum

["Maxime Ducharme" <mducharme () cybergeneration com>]

Hi again

made a mistake in my explanation, part

" When you redirect a program's output, you may
specifiy which output you want (stdin or stderr)."

should read

" When you redirect a program's output, you may
specifiy which output you want (STDOUT or stderr)."


stdin is used for inputs, i.e. file reads & keyboard
strokes.

Have nice day

Maxime Ducharme
Programmeur / Spécialiste en sécurité réseau

----- Original Message ----- 
From: "Maxime Ducharme" <mducharme () cybergeneration com>
To: <ald2003 () users sourceforge net>; "Full-Disclosure@Lists. Netsys. Com"
<full-disclosure () lists netsys com>
Sent: Tuesday, August 17, 2004 10:54 AM
Subject: Re: [Full-disclosure] cmd.exe bug in win2k sp4 in "for" loop


> Hi Aditya,
>     this is not a bug, but normal operation of
> msdos command interpreter.
>
> There is a concept of different outputs for
> normal output and errors.
>
> They are called "stdout" and "stderr".
>
> stdout = 1
> stderr = 2
>
> When you redirect a program's output, you may
> specifiy which output you want (stdin or stderr).
>
> By default stdout is used, so a "1" is added before
> the redirections ">" or ">>".
>
> If you want to catch errors, you need to specify
> stderr output like this :
>
> echo "ello" 2>>stderr.log
>
> You may also catch each of them like this :
>
> echo "ello" 1>>stdout.log 2>>stderr.log
>
> You may find more details here :
> www.microsoft.com/windowsxp/home/using/productdoc/en/redirection.asp
>
> This is XP details, but I think it is the same behavior on NT, 2K and
2003.
> Have a nice day
>
> Maxime Ducharme
> Programmeur / Spécialiste en sécurité réseau
>
> ----- Original Message ----- 
> From: Aditya, ALD [Aditya Lalit Deshmukh]
> To: Full-Disclosure@Lists. Netsys. Com
> Sent: Tuesday, August 17, 2004 1:31 AM
> Subject: [Full-disclosure] cmd.exe bug in win2k sp4 in "for" loop
>
>
> On windows 2000 SP4 the command processor cmd.exe has a small bug in the
for
> loop see the attached image, this is making all the bat file go crazy with
> the output see the selected potions....
>
> is this a known bug, with a patch ? can it be reproduced on other
NT/2k/XP/3
> versions of windows ?
>
> -aditya
>
> _______________________________________________
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