From owner-freebsd-questions@FreeBSD.ORG  Mon Mar 26 06:40:46 2007
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Date: Mon, 26 Mar 2007 02:40:45 -0400
From: Kris Kennaway <kris@obsecurity.org>
To: Mikhail Teterin <mi+kde@aldan.algebra.com>
Message-ID: <20070326064045.GA10259@xor.obsecurity.org>
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Cc: robert+freebsd.inbox@cyrus.watson.org, kaeru@pd.jaring.my,
	FreeBSD-Questions@FreeBSD.org
Subject: Re: jail vs. nice
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On Mon, Mar 26, 2007 at 01:28:51AM -0400, Mikhail Teterin wrote:
> Hello!
> 
> A program (a TclX' self-test script) works fine in a normal environment, but 
> fails to renice itself, when running in jail (as root):
> 
> 	==== nice-1.8 nice tests FAILED
> 	==== Contents of test case:
> 
> 	    list [nice -1] [nice]
> 
> 	---- Test generated error; Return code was: 1
> 	---- Return code should have been one of: 0 2
> 	---- errorInfo: failed to increment priority: permission denied
> 	    while executing
> 	"nice -1"
> 	    invoked from within
> 	"list [nice -1] [nice]"
> 	    ("uplevel" body line 2)
> 	    invoked from within
> 	"uplevel 1 $script"
> 
> This is new -- just a few months ago the same script was working fine, but it 
> is failing now in both 7.0 and 6.2.

And 5.x.  Or it could just be a changed behaviour of the 7.0 kernel,
which is common to all builds.

Kris