On Mon, Jan 12, 2009 at 6:03 PM, James Harper
<james.harper AT bendigoit.com DOT au> wrote:
>> Stefan Sorin Nicolin wrote:
>> > Hi,
>> >
>> > I have yet another exclusive configuration need. I'd like to back up
> a
>> > file _without_ it's contents. I noticed that under Gentoo Linux
> /dev/
>> > tty12 takes a lot of useless space. The terminal output is stored
>> > there - somethig that I can very well live without in case I have to
>> > restore a system from backup.
>> > The only way I can imagine it right now is to exclude the file
>> > completely and create a dedicated restore jobdef where /dev/tty12 is
>> > created per runscript directive. This doesen't feel right though.
>> > Any ideas?
>> >
>> > Thanks much.
>> >
>> > Stefan Sorin Nicolin
>> > http://nicolinux.org
>> >
>> As /dev is populate by udev I always exclude it completely .
>>
>
> Have you tested a restore? If you are restoring to 'baremetal', then you
> might actually need something in /dev before udev starts, which is a bit
> tricky as it's 'under' udev...
>
This should be enough:

[ ! -c /dev/null ] && rm /dev/null
[ ! -c /dev/null ] && mknod /dev/null c 1 3

#These are for builds that require a random number generator
[ ! -c /dev/random ] && mknod /dev/random c 1 8
[ ! -c /dev/urandom ] && mknod /dev/urandom c 1 9

#This is for initially populating the /dev folder. Without this
populated I could not boot the installed system.
[ ! -e /dev/console ] && mknod /dev/console c 5 1
[ ! -e /dev/tty ] && mknod /dev/tty c 5 0
[ ! -e /dev/tty0 ] && mknod /dev/tty0 c 4 0
[ ! -e /dev/tty1 ] && mknod /dev/tty1 c 4 1
[ ! -e /dev/tty2 ] && mknod /dev/tty2 c 4 2
[ ! -e /dev/tty3 ] && mknod /dev/tty3 c 4 3
[ ! -e /dev/tty4 ] && mknod /dev/tty4 c 4 4
[ ! -e /dev/tty5 ] && mknod /dev/tty5 c 4 5
[ ! -e /dev/tty6 ] && mknod /dev/tty6 c 4 6
[ ! -e /dev/tty7 ] && mknod /dev/tty7 c 4 7
[ ! -e /dev/tty8 ] && mknod /dev/tty8 c 4 8
[ ! -e /dev/tty9 ] && mknod /dev/tty9 c 4 9
[ ! -e /dev/tty10 ] && mknod /dev/tty10 c 4 10
[ ! -e /dev/tty11 ] && mknod /dev/tty11 c 4 11
[ ! -e /dev/tty12 ] && mknod /dev/tty12 c 4 12

BTW, this is what I use to generate gentoo systems from stage3 builds
using metro.

http://wiki.github.com/funtoo/metro

or my fork of metro:

http://wiki.github.com/drescherjm/metro


John

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