From owner-freebsd-current  Thu Sep 14  3:28:38 2000
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Date: Thu, 14 Sep 2000 11:27:51 +0100
From: Ben Smithurst <ben@FreeBSD.org>
To: Leif Neland <leifn@neland.dk>
Cc: Paul Herman <pherman@frenchfries.net>,
	Vivek Khera <khera@kciLink.com>, freebsd-current@FreeBSD.ORG
Subject: Re: call for testers: init securelevel patch
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References: <Pine.BSF.4.21.0009081717590.315-100000@bagabeedaboo.security.at12.de> <Pine.BSF.4.21.0009140652020.32667-100000@arnold.neland.dk>
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Leif Neland wrote:

> How is that done?
> Will gdb not attach to init, or will init not let gdb attach?

The kernel won't let GDB attach.  Look at the code for ptrace()...

                /* can't trace init when securelevel > 0 */
                if (securelevel > 0 && p->p_pid == 1)
                        return EPERM;

-- 
Ben Smithurst / ben@FreeBSD.org / PGP: 0x99392F7D


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