linux-kernel - Re: Variant symlink filesystem

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Message-ID: <20160311215106.GU17997@ZenIV.linux.org.uk>
Date:	Fri, 11 Mar 2016 21:51:06 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Cole <cole@...eqint.net>
Cc:	"Austin S. Hemmelgarn" <ahferroin7@...il.com>,
	Richard Weinberger <richard@....at>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Variant symlink filesystem

On Fri, Mar 11, 2016 at 10:52:52PM +0200, Cole wrote:

> The implementation doesn't necessarily have to continue to work with
> env variables. On FreeBSD, the variant symlinks function by using
> variables stored in kernel memory, and have a hierarchical lookup,
> starting with user defined values and terminating with global entries.
> I am not aware of such functionality existing on linux, but if someone
> could point me at something similar to that, I would much prefer to
> use that, as there are issues with variables that are exported or
> modified during process execution.

Put your processes into a separate namespace and use mount --bind in it...