X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:in-reply-to:references:date
	:message-id:subject:from:to:content-type; q=dns; s=default; b=Fl
	IxEr11NoMOUtj1NHz/uXkGaaUDA+HBWnJ0HdwQfhUANO4KxA+cbU/XeVj0ctmttV
	IK22VlF9N0EXMGxI+kiSMjo9GCywCsd/HLARSp8l2S101/R4lAGBZ88BgjF8Qgj5
	ju76XhXKBfksH1qt2Ha+iaSTlI5lOBGL6+VDxBqvw=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:in-reply-to:references:date
	:message-id:subject:from:to:content-type; s=default; bh=QcivcAMC
	efU/O1gl1waz4FhZua0=; b=TEHg8hDYGnxmyRnvDSFUlSF71TPLvWZ1WILLnOL3
	ccx23n107TSQ3vfw2HfRfAyjN5DjOzZVZ7wLN5zChyT61tjBrUaSXSJ0PI6DMnuO
	WgTbWHurplSJZzsqtB7Y5oGQjFOcfyr1ORuVphISxUzIFW7+VCMnQ6/cAfXrPVu3
	3pU=
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
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-1.4 required=5.0 tests=AWL,BAYES_05,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=Kenneth, kenneth, H*i:sk:aBJ7Agb, H*f:sk:aBJ7Agb
X-HELO:	mail-lf0-f49.google.com
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=BF0F2ppr0UGE8H3qoq+UDfZGwTiPfqZftU+kc+5eQ4E=; b=TwFLIlqvMihpo3X0PiF1SfpKs9rjuqs/B0YymBMECgU7yEmhCyedWmL79qAGnwKnKR zqlzDeLyL6nT3r13MMHR725WXBQUMb7FIKP7+tcKtx2GHnHde5du0FftoU9IQdSzoqTD FlhcD1UGn0YL+bK3ev7BBnk154AjKol/0GnJinz+EeXkC03+cK5aVzI9X3+mY9D/icFa M3fXl4qGX2Fy+HZxVBUkxke6tSlGnVibc48bF+M1FihO8LKvk8UFpAuyJvhhQ9ZAjPmr plIXb4Jdb+oeIFBvX88ZNx0LI1HRw2iugTP711ouGoQWrXYYBHvYrIJuEX4ohbezbOFr wpKA==
X-Gm-Message-State:	AG10YOTpZPAdx2cR/N4ClsGQg2kU2JUwLcHLTaROeaw0bD7KE8mWN32yve+J/ZmMl9JeJjVhbQede+4Cn3MOVA==
MIME-Version:	1.0
X-Received:	by 10.25.64.9 with SMTP id n9mr2240901lfa.13.1453505669836; Fri, 22 Jan 2016 15:34:29 -0800 (PST)
In-Reply-To:	<CADex0xzfB3=aBJ7AgbTJ0hQKpmD0JSnX6xcjmu4fmqy284j5jw@mail.gmail.com>
References:	<CADex0xzfB3=aBJ7AgbTJ0hQKpmD0JSnX6xcjmu4fmqy284j5jw AT mail DOT gmail DOT com>
Date:	Fri, 22 Jan 2016 18:34:29 -0500
Message-ID:	<CACoZoo3HLq1Zdfstta6_yK6-buy2Sp2GfaMmjp8Ec23bsbcuvA@mail.gmail.com>
Subject:	Re: Using Perl on Cygwin; how to prevent display of unwanted usage/error message?
From:	Erik Soderquist <ErikSoderquist AT gmail DOT com>
To:	cygwin AT cygwin DOT com
X-IsSubscribed:	yes

In cygwin, I use >/dev/null 2>&1 quite frequently and it works as expected.

In windows cmd.exe, I don't know why they would recommend the < part
for dealing with output, but I have used >NUL 2>&1 for the same effect
in Windows command shells.

-- Erik

On Fri, Jan 22, 2016 at 6:21 PM, Kenneth Wolcott
<kennethwolcott AT gmail DOT com> wrote:
> Hi;
>
>   I'm using a qx call to "net user username /DOMAIN" (probably should
> use system instead) to determine whether a person having an active
> account in an application is still an employee.
>
>   I get two messages back (error and/or usage) when a username is not found.
>
> "The user name could not be found."
>
> and
>
> "More help is available by typing NET HELPMSG 2221."
>
> I'd like to hide (not display, not print) these two messages.
>
> Coming from a UNIX/Linux background, I'd do a "2>&1 > /dev/null"
> operation to dispose of STDOUT and STDERR, but "1<&2 > NUL" (suggested
> by
>
> "https://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx?mfr=true"
>
> does not seem to work.
>
>   I tried file descriptor 3, but that resulted in an error regarding
> unsupported file handle,. or something like that.
>
>   I was considering using IPC::Run3, but I don't think that will help
> with suppressing error message and usage message.
>
> Perhaps there is a Perl module that is native to Cygwin that will
> perform this kind of lookup for me?  Maybe a Perl module that is NOT
> native to Cygwin?
>
> Thanks,
> Ken Wolcott
>
> --
> 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 -