CHECKUPDATES_DB="${TMPDIR:-/tmp}/checkup-db-${USER}/"
DBPath="$(pacman-conf DBPath)"
mkdir -p "$CHECKUPDATES_DB"
ln -sf "${DBPath}/local" "$CHECKUPDATES_DB" > /dev/null 2>&1
fakeroot pacman -Sy --dbpath "$CHECKUPDATES_DB" --logfile /dev/null >/dev/null || return $?
pacman -Qu --dbpath "$CHECKUPDATES_DB/" 2> /dev/null | grep -v '\[.*\]'
exit 0