Re: [ros-kernel] Disk layout continued

[Aliberti E. <ea...@us...>]

On 23 May 2002 at 1:40, Casper Hornstrup wrote:

> What root are we talking about? The Object Manager root or the Win32
> shell namespace root? System drive? POSIX subsystem root? Other?
> 
> Yes, unix applications expect a certain disk layout. However the POSIX
> subsystem can emulate this layout so the unix applications are happy.
> 
> Now I'm confused. Which special file system object? Symbolic links are
> handled by the object manager in cooperation with it's clients.
> 
> The subsystem translates relative paths into fully qualified paths.
>
> Each subsystem can provide symbolic links to a central location.
>
> Just configure your subsystems to have the same view of your volumes
> then.


I simply reproduce verbatim what Casper wrote. What is apparently 
missing in the original dialog is what Casper tries (desperately;) to 
affirm with his comments. By dropping the dialog text, I hope that 
obscure thing pops up itself.
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What we are talking about is a "name space". Of course there is only 
one name space in every OS. In NT, the name space is the system name 
space, the one generated and maintained by the Ob manager in the 
executive. Whatever you create in NT, unless it is unamed, it has a 
fully qualified name from the root "\" down to its own (relative) 
name. One of the important tasks in Os simulation is name space 
simulation. As I just recalled, every OS has its own name space, 
{directory|folder|library} separator convention, file name convention 
etc. Do you really belive that "A:" really exist in your very new XP 
pro box? It is just what the Win32 subsytem show to you (dear) my 
windows process. Therefore what we really need is not "where do I put 
my files?", but "what is a complete and correct mapping of the system 
name space to project it, in full or partially, in my os name 
space?". Also, keep in mind that Win32 can NOT see the whole system 
name space. Therefore it is NOT required an isomorphism between the 
system name space and your own subsystem's name space.