Bob Chiodini wrote:
A couple of questions: Is your mount command coming from busybox?
Nash, I think, so it might be busybox.
Can
you mount -o remount,ro the file system? noatime,ro in fstab is how it
was done on one of the embedded systems I was working on, but it was not
CF based. ?
s
If I put it in right before the switchroot command, it "seems" to lock
it. (This is what I was doing when I was trying to debug it; I started
with the fstab, and then moved further in).
aph what is
Presuming busybox: Are you mounting the file system with the --ro
option in your linuxrc file? This is the linuxrc file I used, but I
cannot verify that it worked correctly, WRT mounting the root file
system ro, I thought so:
Yes. The command is mount -o defaults --ro -t ext2 /dev/hda3 /sysroot
#!/bin/nash
echo Mounting /proc filesystem
mount -t proc /proc /proc
echo Creating root device
mkrootdev /dev/root
echo 0x0100 > /proc/sys/kernel/real-root-dev
echo Mounting root filesystem
mount --ro -t ext3 /dev/root /sysroot
umount /proc
pivot_root /sysroot /sysroot/initrd
This was a 2.4 kernel, based system. It started out from RH7. Nash was
probably the only piece that was kept.
Basically, what I would *like* is this.
I have a 256mb CF device. I want to slice 10mb or so off, format it
ext2, and put grub in it.
The rest of the flash has a vfat filesystem on it, so that I can muck
with kernel installs/etc from most any machine, rather than tying myself
to Linux/BSD.
In my initrd, I have the file init (I basically created the sucker with
mkinitrd, and tailored this file to suit my needs):
echo Mounting Root filesystem
mkdir /dos
mount -o defaults --ro -t vfat /dev/hda2 /dos # I have tried this with
and without the ro flag
find / -name system.vhd # from the boot screen, this reports
//dos/system.vhd
losetup /dev/loop0 /dos/system.vhd
mount -o defaults --ro -t ext2 /dev/loop /sysroot # also, with and
without the ro flag
echo Switching to new root
switchroot --movedev /sysroot
When the system starts, it ends up dying during the losetup phase with
"bio too big device loop0".
Steve
