Date: Thu, 8 Feb 1996 19:04:02 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: julian@TFS.COM (Julian Elischer) Cc: phk@critter.tfs.com, julian@TFS.COM, hackers@FreeBSD.ORG Subject: Re: CHROOT changes to login. Message-ID: <199602090204.TAA09246@phaeton.artisoft.com> In-Reply-To: <m0tkgLY-0003xJC@TFS.COM> from "Julian Elischer" at Feb 8, 96 04:05:51 pm
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> not a bad idea, but if you ever type your name wrong, you've had it..
> you'll be redirected to the chroot area.. And the nature if that is that you
> can't get back. Actually I DO have a way of doing this I think
> chroot("../../../../../../..");
> should chroot you back to /, as at
> this time the CWD has not been changed yet..
Open the "/" dir and use fchdir on the fd. Then chroot( ".") (relative).
Actually, there are some bogons in the vfs_lookup code relative to
the chrooted directory. The namei really wants a relative root in
the structure instead of pulling the thing from the proc structure
directly. Specifically, if you lookup a / path for a traversed
mountpoint from /... it's grungy code.
But the above should work, for now at least.
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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