From owner-freebsd-questions  Mon Oct 22  0: 2:41 2001
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To: Joe Clarke <marcus@marcuscom.com>,
	Matthew Blacklow <matthew.blacklow@ticca.com>,
	freebsd-questions@FreeBSD.ORG
From: Cliff Sarginson <cliff@raggedclown.net>
Subject: Re: C clue on FreeBSD
Date: Mon, 22 Oct 2001 07:02:33 GMT
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> 
> 
> On Mon, 22 Oct 2001, Matthew Blacklow wrote:
> 
> > Hi all,
> > 	I am running FreeBSD and am trying to learn C. I have a program at the
> > moment which using C's "system" function launches a FreeBSD application. The
> > problem is that it outputs to the screen all the output of the spawned
> > process. I need to know how to supress the output of this process. I have
> > looked through many C programming books and on the web and cant seem to find
> > what i am looking for.
> 
> Try:
> 
> system("/my/app 2>&1 >/dev/null");

Wrong. Stderr will still end up on his terminal.

  system("/my/app >/dev/null 2>&1");

The order is significant :)

> That will redirect all stdout and stderr to /dev/null, thus making your
> program silent.
> 
> Joe
> 
> >
> > All help appreciated
> >
> >
> > Thanks,
> > Matthew
> >
> >
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> >
> 
> 
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-- 

Regards
Cliff


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