Best use of mdev?

[Mike Frysinger]

On Friday 02 May 2008, Bernhard Fischer wrote:
> On Fri, May 02, 2008 at 12:49:33AM +1000, Michael D. Setzer II wrote:
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> >I was just contacted by a user that has 11 partitions on a large hard
> > disk. My g4l project currently has the nods setup as being precreated in
> > the /dev directory. It had massive number of these for both the hd and sd
> > going all the way to sdp but only to the 9th option. I was manually able
> > to create a script to create the additional nods, but then started
> > looking at options to have it automaticly create the proper nods. I have
> > found the mdev, and seem to have figured some of it out, but think there
> > might be some additional things to make it work better.
> >
> >I booted from the g4l cd, and did the following manually.
> >
> >created the /etc/mdev.conf with these two lines.
> >
> >hd[a-z][0-9]* 0:3 660
> >sd[a-z][0-9]* 0:3 660
> >
> >Run the commands to create the /dev
> >
> >mkdir /sys
> >mount -t sysfs sysfs /sys
> >mdev -s
> >
> >Below is the original contents of the /dev directory minus all the hd and
> > sd files. Not sure which all of these can also be created with the
> > mdev.conf file and which have to be manually created. Also, some of the
> > directories were for raid systems that users had. Would the mdev create
> > these?
> >Unfortunately, I don't have all the hardware to test.
>
> I usually only have /dev/null and /dev/console and create all the rest
> via mdev.

/dev/console is required to be on the root device before userspace is even 
executed.  after that, if you code things safely, you literally need no other 
nodes (mdev will create console and null for you).  however, people often 
create /dev/null ahead of time so they can redirect into it with impudence.
-mike
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