Update factory installer, factory test

src/platform/init/chromeos_startup

 #!/bin/sh
 
 # 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.
 
 HAS_INITRAMFS=0
 if [ -d /dev/.initramfs ]
 then
   # The initrd will have mounted /sys, /proc, and /dev for us.
   HAS_INITRAMFS=1
 else
   mount -n -t sysfs -onodev,noexec,nosuid sysfs /sys
   mount -n -t proc -onodev,noexec,nosuid proc /proc
   mount -n -t tmpfs -omode=0755 udev /dev
 fi
 
 PRE_UPTIME_STAT=$(cat /proc/uptime)
 PRE_DISK_STAT=$(cat /sys/block/sda/stat)
 
-# Moblin trick: Disable blinking cursor. Without this a splash screen
-# will show a distinct cursor shape even when the cursor is set to none.
-echo 0 > /sys/devices/virtual/graphics/fbcon/cursor_blink
-
 # Since we defer udev until later in the boot process, we pre-populate /dev
 # with the set of devices needed for X and other early services to run.
 cp -a -f /lib/chromiumos/devices/* /dev
 
-# Splash screen!
-if [ -x /usr/bin/ply-image ]
-then
-  /usr/bin/ply-image /usr/share/chromeos-assets/images/login_splash.png &
+# Splash screen! Unless we are in noninteractive mode.
+# TODO(sosa@chromium.org) - Use kernel flag
+if [ -x /usr/bin/ply-image ]; then
+  if [ ! -f /root/.factory_test ] && [ ! -f /root/.factory_installer ]; then
+    # Moblin trick: Disable blinking cursor. Without this a splash screen
+    # will show a distinct cursor shape even when the cursor is set to none.
+    echo 0 > /sys/devices/virtual/graphics/fbcon/cursor_blink
+
+    /usr/bin/ply-image /usr/share/chromeos-assets/images/login_splash.png &
+  fi
 fi
 
 mount -n -t tmpfs tmp /tmp
 mount -n -t tmpfs -onosuid,nodev shmfs /dev/shm
 mount -n -t devpts -onoexec,nosuid,gid=5,mode=0620 devpts /dev/pts
 
 # Mount our stateful partition. It's always partition 1.
 ROOT_DEV=$(rootdev)
 STATE_DEV=${ROOT_DEV%[0-9]*}1
-mount -n -t ext3 "$STATE_DEV" /mnt/stateful_partition
+
+# For factory install shim, we never want to write to the SDCard.
+if [ -f /root/.factory_installer ]; then
+  mount -n -t tmpfs tmp /mnt/stateful_partition
+else
+  mount -n -t ext3 "$STATE_DEV" /mnt/stateful_partition
+fi
 
 # Check if the stateful partition has requested self-destruction
 # This is used for the factory install process
 RESET_FILE="/mnt/stateful_partition/factory_install_reset"
 if [ -f "$RESET_FILE" ]; then
   if [ $(stat -c%u "$RESET_FILE") -eq 0 ]; then
     echo "Erasing stateful partition..."
     exec /sbin/clobber-state
   fi
 fi
@@ skipping 56 matching lines @@
 (test -f "$SALT" || head -c 16 /dev/urandom > "$SALT") &
 
 # Write out uptime and disk stats pre/post startup
 cat /proc/uptime > /tmp/uptime-post-startup
 ! cat /sys/block/sda/stat > /tmp/disk-post-startup
 echo "$PRE_UPTIME_STAT" > /tmp/uptime-pre-startup
 echo "$PRE_DISK_STAT" > /tmp/disk-pre-startup
 
 # Always return success to avoid killing init
 exit 0