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Date: Wed, 04 Apr 2007 16:28:38 -0700
From: Maxim Sobolev <sobomax@FreeBSD.org>
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To: Chuck Swiger <cswiger@mac.com>
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Cc: Andrew Pantyukhin <infofarmer@FreeBSD.org>,
	FreeBSD Current <current@FreeBSD.org>
Subject: Re: Surviving /dev/null disappearance
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Chuck Swiger wrote:
> Andrew Pantyukhin wrote:
>> On 4/3/07, Maxim Sobolev <sobomax@freebsd.org> wrote:
>>> Patch ld(1) to detect the condition and don't unlink the device node?
>>
>> Yes, but there has to be a generic solution, so that
>> we don't reinvent the wheel for every one of the
>> thousands apps that may do this.
>>
>> Isn't there some safety-net wrapper function that
>> refuses to remove device nodes and maybe some other
>> types of files?
> 
> Why not set a filesystem flag like schg on device nodes under a devfs 
> tree...?

Well, I suspect that it may cause ld(1) fail instead. What we want it to 
do is to not perform unlink(2) before open(2) when -o argument is device 
node.

-Maxim