From owner-freebsd-arch  Fri Jun  8  5:27: 1 2001
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To: "Patrick W. Penzias Dirks" <pwd@apple.com>
Cc: FreeBSD-FS@FreeBSD.ORG, FreeBSD-Arch@FreeBSD.ORG
Subject: Re: Support for pivot_root-like system call?
References: <200106072103.f57L37l26327@scv2.apple.com>
From: Assar Westerlund <assar@FreeBSD.ORG>
Date: 08 Jun 2001 14:26:53 +0200
In-Reply-To: "Patrick W. Penzias Dirks"'s message of "Thu, 7 Jun 2001 14:03:06 -0700"
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"Patrick W. Penzias Dirks" <pwd@apple.com> writes:
> I'm the filesystems tech lead in Apple's Mac OS X Core OS group.  
> Prompted by the needs of, among others, virus protection software 
> developers who want to be able to mount "on" the root directory to 
> intercept ALL filesystem calls in the system, I'm contemplating 
> implementation of a new system call in Mac OS X to do something like 
> Linux's pivot_root system call:
> 
> 	int pivot_root(const char *new_root, const char *put_old);

Could you explain to me/us how you would implement virus protection
software (or something similiar), based on pivot_root?

Is there any such stuff for linux that uses pivot_root?

/assar

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