if test $# = 0; then
    exec "$THIS_SH" "$0" abc "d e"
fi

echo TEST1 >"$1.out"
echo TEST2 >"$2.out"
# bash says: "$@.out": ambiguous redirect
# ash handles it as if it is '$*' - we do the same
echo TEST3 >"$@.out"

cat abc.out "d e.out" "abc d e.out"

rm abc.out "d e.out" "abc d e.out"