Re: Suggested dual human/binary interface for proc/devfs

From: Horst von Brand (vonbrand@inf.utfsm.cl')
Date: Thu Apr 13 2000 - 09:03:27 EST


Linus Torvalds <torvalds@transmeta.com> said:
> On Wed, 12 Apr 2000, Richard Gooch wrote:

[...]

> > How? And just doing it at bootup isn't enough. Sometime later the
> > sysadmin does chmod(2) on /dev/floppy/0. That change has to be pushed
> > through to the underlying FS.

> "underlying FS"?

> There doesn't _need_ to be anything underlying.

For a RAMFS which starts clean each time it is mounted you are right. For a
filesystem that manages devices persistence of permissions and ownership is
vital, as is managing those with the standard tools (chown(1), chmod(1),
ls(1), find(1), ...).

[...]

> What do you buy by having a separate backing store (aka "underlying FS")?
> Not much.

Only the difference between "utterly broken" and "working" for devfs

-- 
Dr. Horst H. von Brand                       mailto:vonbrand@inf.utfsm.cl
Departamento de Informatica                     Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria              +56 32 654239
Casilla 110-V, Valparaiso, Chile                Fax:  +56 32 797513

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