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Date: Fri, 22 Sep 2006 14:43:22 +0200
From: Jilles Tjoelker <jilles@stack.nl>
To: Gleb Smirnoff <glebius@FreeBSD.org>
Message-ID: <20060922124322.GB2871@stack.nl>
References: <20060919142739.GM27667@cell.sick.ru>
	<200609191539.aa46619@walton.maths.tcd.ie>
	<20060920095012.GS27667@cell.sick.ru>
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X-Operating-System: FreeBSD 5.5-RELEASE-p1 i386
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Cc: David Malone <dwmalone@maths.tcd.ie>, current@FreeBSD.org
Subject: Re: VFS(?) weirdness
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On Wed, Sep 20, 2006 at 01:50:12PM +0400, Gleb Smirnoff wrote:
> Oops. Well, going up the directory tree, I've found that the '..'
> entry is unaccessible in the /usr and /var directories:

> glebius@jujik:/var:|>ls -la
> ls: ..: Permission denied
> total 1120
> drwxr-xr-x  25 root    wheel         512 20 ??? 17:39 .
> drwxrwxr-x   2 root    operator      512 19 ??? 12:14 .snap
> drwxr-xr-x   2 root    wheel         512 21 ???  2004 account
> drwxr-xr-x   4 root    wheel         512 28 ???  2004 at
> drwxr-x---   2 root    audit         512 21 ???  2006 audit
> <skip>

Check the permissions of the original mount point (you need to umount
/usr and /var to do so).

 From mount(1):
] CAVEATS
]      After a successful mount, the permissions on the original mount point
]      determine if .. is accessible from the mounted file system.  The minimum
]      permissions for the mount point for traversal across the mount point in
]      both directions to be possible for all users is 0111 (execute for all).

-- 
Jilles Tjoelker