Date: Sat, 03 Feb 2001 11:36:45 +0100 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Jordan Hubbard <jkh@winston.osd.bsdi.com> Cc: Warner Losh <imp@harmony.village.org>, John Indra <john@naver.co.id>, freebsd-current@FreeBSD.ORG Subject: Re: DEVFS newbie... Message-ID: <12371.981196605@critter> In-Reply-To: Your message of "Sat, 03 Feb 2001 01:18:08 PST." <82167.981191888@winston.osd.bsdi.com>
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In message <82167.981191888@winston.osd.bsdi.com>, Jordan Hubbard writes: >> Once we have an extensible facility for mount options, you will be >> able to say: >> >> mount -t devfs devfs /home/jail/dev >> ( cd /home/jail/dev ; rm $devices_i_dont_want_in_my_jails ) >> mount -u -o nonewdev /home/jail/dev > >Couldn't you also do "mount -t devfs -o nonewdev devfs /home/jail/dev" >and then cd /home/jail/dev ; rm $devices_i_dont_want_in_my_jails ? It >seems that "read my lips: no new devices" should be an option you can >set from the very initial mount so that people can't also figure out >how to get root, remove a /dev entry and replace it with one of their >own. Come to think of it, there should also be a -o staticdev option >to disallow *any* changes after the initial mount. That would make >some of our more paranoid sysadmins happy. That's called "mount -o ro" :-) I have not finalized the workings of the options, right now we have a 32-bit bitmap of mountoptions and they're all used up, and I don't have the time and bikeshedcarpenter hours to design a new mount option implementation. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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