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From: jgy@hropus.UUCP (John Young)
Newsgroups: comp.unix.wizards
Subject: Re: shell stderr in popen()
Message-ID: <1233@hropus.UUCP>
Date: Tue, 11-Aug-87 11:12:06 EDT
Article-I.D.: hropus.1233
Posted: Tue Aug 11 11:12:06 1987
Date-Received: Thu, 13-Aug-87 03:45:25 EDT
References: <4511@sunybcs.UUCP> <8708100615.AA06203@ephemeral.ai.toronto.edu> <7932@mimsy.UUCP>
Distribution: na
Organization: Bell Labs, Holmdel, NJ
Lines: 19

> >In article <7928@mimsy.UUCP> I suggest:
> ># 	(void) sprintf(expandcmd, "sh -c '%s' 2>/dev/null", command);
> ># 	iop = popen(expandcmd, "r");
> 
> In article <8708100615.AA06203@ephemeral.ai.toronto.edu> rayan@utegc.UUCP
> writes:
> >Seems too expensive. Try
> >
> >	popen("exec 2> /dev/null ; /usr/bin/mynewcommand -flags", "r");
> 
> This is a good idea.  Unfortunately, it does not work; the shell has
> already set its own standard error to another descriptor, so that it
> can still print errors.
> -- 
> In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7690)
> Domain:	chris@mimsy.umd.edu	Path:	seismo!mimsy!chris
> 

It has always worked for me on System V systems.