#!/bin/sh
 
POINT="/arch64"
ID=`id -u`
 
function quit {
	exit 1
}
 
function usage {
	echo "usage: $0 -m/-u"
	quit
}
 
function mount_point {
	cd $POINT
	mount -t proc proc proc/
	mount -t sysfs sys sys/
	mount -o bind /dev dev/
	mount -t devpts pts dev/pts/
	chroot . /bin/bash
}
 
function umount_point {
	cd $POINT
	umount proc/
	umount sys/
	umount dev/pts/
	umount dev/
}
 
function check {
	if [ "$1" == "-m" ]; then
		mount_point $POINT
	elif [ "$1" == "-u" ]; then
		umount_point $POINT
	else
		usage	
	fi
}
 
# Check root
if [ "${ID}" -ne "0" ]; then
	echo "Plz run this as root or via sudo. Thank you"
	quit
fi
 
# Main 
if [ $# -eq 1 ]; then
	check $1
else
	usage
fi