Re: flushing HFS cache to disk

Subject: Re: flushing HFS cache to disk

From: Mike Smith <email@hidden>

Date: Thu, 1 Dec 2005 12:23:29 -0800

Delivered-to: email@hidden

On Nov 29, 2005, at 12:03 PM, email@hidden wrote:

In order to read _current_ HFS data from a mounted disk we need to
flush the HFS cache to disk before we start to read.

You're not permitted to do this; while the volume is mounted the HFS filesystem

instance is the sole owner of that range of disk blocks.

You cannot legally read or write these blocks; the filesystem is under no

obligation to ensure that the physical device contains data meaningful to

you, and it (rightfully) expects that data on disk remains as it was written.

I need to get a list of all files with related information.

This must be obtained via the standard system call interfaces; the system

knows far more about the state of the filesystem than you do, and it presents

this information to you in a standardised format.

As others have noted, there are efficient, legal, authenticated interfaces

for obtaining this information. You should use one.

= Mike

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