hash.c:1398
static VALUE
env_values_at(argc, argv)
    int argc;
    VALUE *argv;
{
    VALUE result = rb_ary_new();
    long i;

    for (i=0; i<argc; i++) {
	rb_ary_push(result, rb_f_getenv(Qnil, argv[i]));
    }
    return result;
}
