On Sat, Nov 15, 2008 at 12:40 PM, Nicholas Mc Guire <hofrat@hofr.at> wrote:

> >
> > did you check that it is actually a valid character device (c 5 1) ?
> > it can easaly happend during copying of a tree into your image that
> > they become regular files.
> >
> > hofrat
> >
> I think that you are right, butr how can I test this validity??
>

just check with ls -l that the device file is actually still a character
device with the right major/minor number.

crw--w--w- 1 root tty 5, 1 Nov 13 22:18 /mnt/dev/console

modes and date of course may be diferent.

hofrat

I mount my ext2.img and run ls -l and I get

crw-r----- 1 root root 5, 1 2008-11-15 02:24 console

I think is not ok ?!

Now regarding some steps in the creation of the rootfs:

use "tmpfs" for cases where a writable file system is needed and add the following lines to the /etc/rc.sh script:

# mount TMPFS because root-fs is readonly
/bin/mount -t tmpfs -o size=2M tmpfs /tmpfs

create the same symbolic links for device files that must be placed in a writable filesystem:

dev/ptyp0	→	/tmpfs/dev/ptyp0	dev/ttyp0	→	/tmpfs/dev/ttyp0
dev/ptyp1	→	/tmpfs/dev/ptyp1	dev/ttyp1	→	/tmpfs/dev/ttyp1
dev/ptyp2	→	/tmpfs/dev/ptyp2	dev/ttyp2	→	/tmpfs/dev/ttyp2
dev/ptyp3	→	/tmpfs/dev/ptyp3	dev/ttyp3	→	/tmpfs/dev/ttyp3
dev/ptyp4	→	/tmpfs/dev/ptyp4	dev/ttyp4	→	/tmpfs/dev/ttyp4
dev/ptyp5	→	/tmpfs/dev/ptyp5	dev/ttyp5	→	/tmpfs/dev/ttyp5
dev/ptyp6	→	/tmpfs/dev/ptyp6	dev/ttyp6	→	/tmpfs/dev/ttyp6
dev/ptyp7	→	/tmpfs/dev/ptyp7	dev/ttyp7	→	/tmpfs/dev/ttyp7
dev/ptyp8	→	/tmpfs/dev/ptyp8	dev/ttyp8	→	/tmpfs/dev/ttyp8
dev/ptyp9	→	/tmpfs/dev/ptyp9	dev/ttyp9	→	/tmpfs/dev/ttyp9
dev/ptypa	→	/tmpfs/dev/ptypa	dev/ttypa	→	/tmpfs/dev/ttypa
dev/ptypb	→	/tmpfs/dev/ptypb	dev/ttypb	→	/tmpfs/dev/ttypb
dev/ptypc	→	/tmpfs/dev/ptypc	dev/ttypc	→	/tmpfs/dev/ttypc
dev/ptypd	→	/tmpfs/dev/ptypd	dev/ttypd	→	/tmpfs/dev/ttypd
dev/ptype	→	/tmpfs/dev/ptype	dev/ttype	→	/tmpfs/dev/ttype
dev/ptypf	→	/tmpfs/dev/ptypf	dev/ttypf	→	/tmpfs/dev/ttypf
tmp	→	/tmpfs/tmp	var	→	/tmpfs/var
dev/log	→	/var/log/log
In case you use dhclient also:
etc/dhclient.conf	→	/tmpfs/var/lib/dhclient.conf	etc/resolv.conf	→	/tmpfs/var/lib/resolv.conf

Shall I create the symlinks manually?
Is rc.sh executed ??

I,ve created a tmpfs directory in my rootfs directory and even if I mount it on my host it's not populateed.
place the corresponding directories and device files in the tmpfs file system, the following code is added to the /etc/rc.sh script:

mkdir -p /tmpfs/tmp /tmpfs/dev \
         /tmpfs/var/lib/dhcp /tmpfs/var/lock /tmpfs/var/run

while read name minor
do      
        mknod /tmpfs/dev/ptyp$name c 2 $minor
        mknod /tmpfs/dev/ttyp$name c 3 $minor

done <<__EOD__
0  0    
1  1    
2  2    
3  3    
4  4    
5  5    
6  6    
7  7    
8  8    
9  9    
a 10    
b 11    
c 12    
d 13    
e 14    
f 15    
__EOD__ 

chmod 0666 /tmpfs/dev/*

Cristian