From owner-freebsd-hackers  Thu May 29 17:39:23 1997
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From: Terry Lambert <terry@lambert.org>
Message-Id: <199705300036.RAA05616@phaeton.artisoft.com>
Subject: Re: Correct way to chroot for shell account users?
To: julian@whistle.com (Julian Elischer)
Date: Thu, 29 May 1997 17:36:05 -0700 (MST)
Cc: imp@village.org, terry@lambert.org, dec@phoenix.its.rpi.edu,
        peter@grendel.IAEhv.nl, mrcpu@cdsnet.net, hackers@FreeBSD.ORG
In-Reply-To: <338E1C3B.2781E494@whistle.com> from "Julian Elischer" at May 29, 97 05:15:55 pm
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It won't work for arbitrary depth without modification...

main()
{
	dev_t		d_last;
	ino_t		i_last;
	struct stat	sb;

	mkdir( "xxx");
	chroot("xxx");
        chdir("..");
	stat( ".", &sb);
	do {
		d_last = sb.st_dev;
		i_last = sb.st_ino;
		if (chdir(".."))
			break;
		stat( ".", &sb);
	} while( sb.st_dev != d_last || sb.st_ino != i_last);
	chroot(".");
}

Now *there's* a reliable hack...  8-).


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.