#!/bin/bash -ex

ROOT="$PWD/demo"

# Clean up on EXIT
function cleanup {
    umount "$ROOT"/{dev/pts,dev,sys,proc} 2>/dev/null || true
}
trap cleanup EXIT

# mount binds
mount --bind /dev "$ROOT/dev/"
mount --bind /sys "$ROOT/sys/"
mount --bind /proc "$ROOT/proc/"
mount --bind /dev/pts "$ROOT/dev/pts"

chroot "$ROOT" "$@"