From owner-svn-src-head@FreeBSD.ORG  Thu Jan  6 21:10:17 2011
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Date: Thu, 6 Jan 2011 21:10:17 +0000
From: Alexander Best <arundel@freebsd.org>
To: Garrett Cooper <gcooper@FreeBSD.org>
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References: <201101041413.p04EDA4f038360@svn.freebsd.org>
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Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org,
	src-committers@freebsd.org, Konstantin Belousov <kib@freebsd.org>
Subject: Re: svn commit: r216955 - head/usr.sbin/rtprio
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On Thu Jan  6 11, Garrett Cooper wrote:
> On Thu, Jan 6, 2011 at 12:41 PM, Alexander Best <arundel@freebsd.org> wrote:
> 
> ...
> 
> > this causes problems when pid is -0:
> >
> > [id|rt]prio -t -0 and [id|rt]prio 10 -0 will try to run "0" via execvp().
> > beforehand however this will also trigger rtprio().
> >
> > a better solution would be to do:
> >
> >                if (argv[2][0] == '-') {
> >                        proc = parseint(argv[2] + 1, "pid");
> >                        if (rtprio(RTP_SET, proc, &rtp) != 0)
> >                                err(1, "RTP_SET");
> >                } else {
> >                        execvp(argv[2], &argv[2]);
> >                                err(1, "%s", argv[2]);
> >                }
> 
> How did you get a pid of -0?

pid 0 stands for the current process. see rptio(2).

cheers.
alex

> Thanks,
> -Garrett

-- 
a13x