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Re: DevFS and "c00lness" (Re: Grub)

On Wed, 7 Nov 2001 22:31, Hamish Moffatt wrote:
> On Tue, Nov 06, 2001 at 02:42:03PM +0100, Russell Coker wrote:
> > In normal operation you don't need to do "ls -l /usr/bin".
> Nor "ls -l /dev". What's your point?

Actually you often need to do "ls -l /dev" to see what devices exist and what 
names they have been given (see the discussion on this thread regarding 
moving /dev/input nodes to /dev).  Then there's the issue of device nodes 
disappearing and being replaced by files.  How often have you seen a system 
with no disk space and a huge file named /dev/st or similar?  How about the 
file /dev/nul that you get when DOS weenies are allowed access to the root 
account?  One of the benefits of devfs in this regard is that regular files 
are not supported on /dev!

Running "ls -l /dev" is not something I need to do often on machines I own 
and run, but most of the machines I work with are owned by other people who 
do all sorts of strange things.

Then there's the issue of file system corruption.  If you have atime enabled 
then the old style /dev use results in regular updates to the inodes for /dev 
which puts them at risk of corruption if something bad happens.  I don't 
recall seeing a device node missing from /dev after a fsck, but as there's a 
few thousand I wouldn't notice unless it was a critical one.

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