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Path: utzoo!utgpu!utcsri!utegc!rayan
From: rayan@utegc.UUCP
Newsgroups: comp.unix.wizards
Subject: Re: shell stderr in popen()
Message-ID: <8708100615.AA06203@ephemeral.ai.toronto.edu>
Date: Mon, 10-Aug-87 02:15:53 EDT
Article-I.D.: ephemera.8708100615.AA06203
Posted: Mon Aug 10 02:15:53 1987
Date-Received: Mon, 10-Aug-87 04:54:15 EDT
References: <4511@sunybcs.UUCP>
Distribution: na
Organization: University of Toronto, AI group
Lines: 25
Checksum: 33829

In article <7928@mimsy.UUCP> chris@mimsy.UUCP (Chris Torek) writes:
# >In article <124@foobar.UUCP> tw@foobar.UUCP (Tom Walsh) writes:
# >> ... i would like to dispose quietly of the shell's complaint:
# >>  sh: command: not found
#
# In article <4511@sunybcs.UUCP> ugbinns@sunybcs.uucp (Leonard Binns) writes:
# >	popen("/usr/bin/mynewcommand -flags 2>& /dev/null", "r");
# 
# This will not do it. ... [try:]
# 
# 	(void) sprintf(expandcmd, "sh -c '%s' 2>/dev/null", command);
# 	iop = popen(expandcmd, "r");

Seems too expensive. Try

	popen("exec 2> /dev/null ; /usr/bin/mynewcommand -flags", "r");

exec with no command does wonderful things to your shell. It is documented
too, on BSD flavours at least. Also, it is built-in (obviously) so there
is very little overhead involved.

rayan
-- 
Rayan Zachariassen
AI group, University of Toronto