#!/bin/sh
# boot from the hard disk partition "$1" (which
# must be given) using options from the rest of
# the command line.

# Use the standard init path (see /etc/init.d/rcS)
export PATH=/sbin:/bin:/usr/sbin:/usr/bin

# Mount required fileystems if necessary
[ -e /proc/cpuinfo ] || mount -t proc  proc  /proc
[ -e /sys/class    ] || mount -t sysfs sysfs /sys

# Load the helper functions
. /etc/default/functions

leds beep -r 2
leds boot system

if test -n "$1"
then
	device="$1"
	shift
	echo "boot: rootfs: mount $* $device"

	# prepare the device.  This uses tmpfs to avoid dependency
	# on non-built-in file systems and because tmpfs can expand
	# to bigger than the 10MByte ram0 partition used before.
	# The 'device' is currently unused.
	if mount -t tmpfs "$@" tmpfs /mnt
	then
		cd /
		# filter out boot (with zimage), linuxrc and anything
		# below /var, keep dev or the boot will fail. Take
		# care that nothing is mounted at this point!
		umount /proc
		umount /sys
		find . -xdev -print |
		sed '\@^./boot/@d;\@^./boot$@d;\@^./linuxrc@d;\@^./var/@d' |
		cpio -p -d -m -u /mnt
		# busybox find with -xdev will not print the name of the
		# mountpoint, so create the empty dir manually if required.
		test -d /mnt/mnt || mkdir /mnt/mnt
		# checkmount checks for sh, chroot, init, /dev
		# and /mnt (i.e. /mnt/mnt in this case).
		# minimaldevnodes checks (and creates if required)
		# a few mandatory /dev nodes we may need.
		if checkmount /mnt && minimaldevnodes /mnt
		then
			# pivot to /mnt
			cd /
			swivel mnt mnt
			# swivel failed
		fi
		# Failure: unmount the partition
		umount /mnt
		# Remount /proc and /sys if necessary
		[ -e /proc/cpuinfo ] || mount -t proc  proc  /proc
		[ -e /sys/class    ] || mount -t sysfs sysfs /sys
	fi
fi

# fallback - use the flash boot
leds beep -f 1000 -r 2
exec /boot/flash