#!/bin/bash
#remaster lib
[ -d "<LIBDIR>" ] || { echo "LIBDIR not exist"; exit 1; }

#iso_extract [iso_source] [iso_extr_dir]
function iso_extract() {
	echo -n "extract iso ... "

	#$1 = iso_source
	#$2 = iso_extr_dir

	#check root
	[ "`whoami`" == "root" ] || {
		echo "### ERROR ### iso_extract: need root permision!"
		return 10
	}

	iso_extr_dir="$2"
	[ -d "$iso_extr_dir" ] || {
		echo "### ERROR ### iso_extract: aim directory not exist!"
		return 12
	}

	iso_source_is_url=false
	iso_source="$1"
	[ -f "$iso_source" ] || {
		#if it is an url...
		if [ url-exist ]; then
			iso_source_is_url=true
			#dl to tmp + set iso_source
		else
			echo "### ERROR ### iso_extract: ISO \"$iso_source\" not exist!"
			return 11
		fi
	}


	#mace tmp mountpoint
	tmpdir="`mktemp -d`"
	[ -d "$iso_extr_dir" ] && {
		rm -r "$iso_extr_dir/"
		mkdir "$iso_extr_dir"
	}

	#copy files ...
	mount -o loop,ro "$iso_source" "$tmpdir"
	cp -f -r "$tmpdir/"* "$iso_extr_dir"

	#clear tmp mountpoint
	umount "$iso_source"
	rm -r "$tmpdir"
	[ "$iso_source_is_url" == "true" ] && rm "$iso_source"
	tmpdir=

	echo "done"
}

#this func is standalone executable
[ -n "$1" ] && {
  iso_extract $@
}