#!/bin/busybox sh

# Mount proc and sys
mount -t proc none /proc
mount -t sysfs none /sys

# Create basic device nodes
mknod /dev/null c 1 3
mknod /dev/tty c 5 0

# Functions for parsing command line options with "=" in them
# eg.: get_opt_f2("init=/sbin/init") will return "/sbin/init"
get_opt_f2() {
	echo "$@" | cut -d "=" -f2
}
get_opt_f3() {
	echo "$@" | cut -d "=" -f3-
}

# Set defaults
init="/sbin/init"
root="/dev/hda1"
rootfstype=""
waitForDevices="true"

# Process command line options
for i in $(cat /proc/cmdline); do
	case $i in
		root\=*)
			argRoot="$(get_opt_f2 $i)=$(get_opt_f3 $i)"
			root=$(get_opt_f3 $i)
			;;
		init\=*)
			init=$(get_opt_f2 $i)
			;;
		rootfstype\=*)
			rootfstype=$(get_opt_f2 $i)
			;;
		initrdnosleep)
			waitForDevices="false"
			;;
	esac
done

# Sleep 15s
if [ "$waitForDevices" == "true" ]; then
	echo "initrd: Waiting 15s before mounting root, for slow init devices"
	sleep 15s
fi

# Populate the rest of the /dev
mdev -s

# Translate UUID/LABEL to dev
if [ "$(echo $root | grep /dev/)" -eq "" ]; then
	echo "initrd: Given root is not an /dev, finding the real /dev..."
	root=$(blkid -c /dev/null | grep $root | head -n1 | awk 'BEGIN{FS=":"}{print $1}')
	echo "initrd: Translated '${argRoot}' to '${root}'"
fi

# Mount the root device
if [ "${rootfstype}" != "" ]; then
	mount -t "${rootfstype}" "${root}" /newroot
else
	mount "${root}" /newroot
fi

# Check if $init exists and is executable
if [[ -x "/newroot/${init}" ]] ; then
	umount /proc
	umount /sys
	exec switch_root /newroot "${init}"
fi

# This will only be run if the exec above failed
echo "!!! Failed to switch_root, dropping to a shell"
exec sh