#!/bin/bash
#
# /linuxrc:  init script to load initrd kernel modules
#
#
# 02-Nov-04 amo Create a minimal initrd.gz to load the rootfs.gz as /
#
#
# Define  the path
#
export PATH="/sbin:/bin:/usr/sbin:/usr/bin"
#
#
function docmd
{
  cmd="$1"
  #
  echo ""
  echo "$cmd"
  $cmd
  #
  stat=$?
  if [ $stat != 0 ];
  then
    echo ""
    echo "ERROR: Failed: $cmd "
    echo ""
    #
    exit 1
  fi
  #
} # docmd
#
#
# Remove for "chroot xxx /linuxrc" testing 
# ----------------------------------
mount -n proc /proc -t proc
#
#
# Load the kernel modules if any
#
# for module in /lib/modules/`uname -r`/*.*o ; do
#   insmod $module
# done
#
#
# Mount the compact flash ( CF:/boot/rootfs.gz )
# -----------------------------------------------
docmd "mount /dev/hda1 /mnt/hda"
#
#
# for debugging
#
# docmd "df"
# docmd "ls -laR /dev /mnt"
#
#
# Just mount the previously formatted rootfs
# ------------------------------------------
#	modprobe loop  - easier to put loop into the kernel
# docmd "insmod /lib/modules/2.4.27-ow1/kernel/drivers/block/loop.o"
#
echo "Might want: losetup /dev/loop0 /mnt/hda/boot/rootfs"
#
docmd "mount -o rw,loop /mnt/hda/boot/rootfs /mnt/loop0"
#
docmd "df"
#
#
# unmount the compact flash
docmd "umount /dev/hda1"
#
# Now we're up and running
echo "chroot /mnt/loop0 /bin/bash"
#
exit 1
#
#
#
#xx # Use pivot_root instead of chroot
#xx # --------------------------------
#xx echo 0x0100 > /proc/sys/kernel/real-root-dev
#xx #
#
#	mount -o defaults --ro -t ext3 /dev/root /sysroot
#	pivot_root /sysroot /sysroot/initrd
#
#xx docmd "mount -n -o remount,ro /dev/ram1 /mnt/rootfs"
#xx #
#xx docmd "pivot_root /mnt/rootfs /mnt/rootfs/initrd"
#
#
#
# we're up 
# ------------
# docmd "chroot /mnt/rootfs /sbin/init 1 "
# docmd "chroot /mnt/rootfs  /bin/bash "
#
#
# docmd "mount -o remount,rw /dev/ram1 /"
#
#
#
# Use dd to create a rootfs ( / ) in memory
# -------------------------
#
#xx docmd "dd if=/mnt/hda/boot/rootfs of=/dev/ram0 bs=1k"
#xx #
#xx # unmount the compact flash
#xx docmd "umount /dev/hda1"
#xx #
#xx #
#xx # Run linux in /dev/ram
#xx # ---------------------
#xx #
#xx docmd "mount -o rw,remount /dev/ram0 /"
#xx #
#xx #
#xx # Execute from ramdisk ( memory )
#xx # --------------------
#xx #
#xx docmd "chroot /"
#
#
# End of file