Just regular mount

init

 #!/bin/sh -x
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # /init script for use in factory install shim.  Requires busybox in
 # /bin/busybox, and a symlink from /bin/sh -> busybox.
 
 # USB card partition and mount point.
@@ skipping 289 matching lines @@
   log "Copying usb->tmpfs..."
   (cd "${USB_MNT}" ; tar cf - . | (cd "${NEWROOT_MNT}" && tar xf  -))
   RES=$?
   log "Copy returned with result $RES"
   return $RES
 }
 
 copy_lsb() {
   STATEFUL_LSB="dev_image/etc/lsb-factory"
   mkdir -p "${NEWROOT_MNT}/mnt/stateful_partition/dev_image/etc"
   # Mounting ext3 as ext2 since the journal is unneeded in ro.

[jglasgow, 2011/03/07 17:02:59]

This comment is no longer relevant

-  if ! mount -n -o ro -t ext2 "${STATE_DEV}" "${STATEFUL_MNT}"; then
+  if ! mount -n "${STATE_DEV}" "${STATEFUL_MNT}"; then
     log "Failed to mount ${STATE_DEV}!! Failing."
     return 1
   fi
   if [ -f "${STATEFUL_MNT}/${STATEFUL_LSB}" ]; then
     log "Found ${STATEFUL_MNT}/${STATEFUL_LSB}"
     cp -a "${STATEFUL_MNT}/${STATEFUL_LSB}" \
         "${NEWROOT_MNT}/mnt/stateful_partition/${STATEFUL_LSB}"
   else
     log "Failed to find ${STATEFUL_MNT}/${STATEFUL_LSB}!! Failing."
     umount "$STATEFUL_MNT"
@@ skipping 491 matching lines @@
   exit 0
 }
 
 # Make this source-able for testing.
 if [ "$0" = "/init" ]; then
   main "$@"
   # Should never reach here.
   exit 1
 fi