#!/bin/sh

# Redirect stdout to stderr
exec 1>&2

case "${1}" in
	-h|--help|-u|--usage)
		echo "live-system - determine if running system is a live system"
		echo
		echo "Usage: ${0} [-v|--verbose]"

		exit 2
		;;

	-v|--verbose)
		_VERBOSE="true"
		;;
esac

[ "${_VERBOSE}" ] && echo -n "Checking for live-system... "

if [ ! -e /proc/cmdline ]
then
	echo "E: /proc/cmdline - No such file."
	exit 2
fi

if grep -qs boot=live /proc/cmdline
then
	[ "${_VERBOSE}" ] && echo -n " yes, this is a live system"

	if [ -d /live/image/install ]
	then
		if ls /live/image/install/pool/main/l/live-installer/live-installer_*.udeb > /dev/null 2>&1
		then
			[ "${_VERBOSE}" ] && echo " with live-installer support."
		else
			[ "${_VERBOSE}" ] && echo " without live-installer support."
		fi
	else
		[ "${_VERBOSE}" ] && echo "without installer support."
	fi

	exit 0
else
	[ "${_VERBOSE}" ] && echo " no, this is not a live system."

	exit 1
fi