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 Message-ID: <20000914112751.H77593@strontium.scientia.demon.co.uk> In-Reply-To: <Pine.BSF.4.21.0009140652020.32667-100000@arnold.neland.dk> 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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