utime

static VALUE
rb_file_s_utime(int argc, VALUE *argv)
{
    struct utime_args args;
    struct timespec tss[2], *tsp = NULL;

    apply2args(2);
    args.atime = *argv++;
    args.mtime = *argv++;

    if (!NIL_P(args.atime) || !NIL_P(args.mtime)) {
        tsp = tss;
        tsp[0] = rb_time_timespec(args.atime);
        if (args.atime == args.mtime)
            tsp[1] = tsp[0];
        else
            tsp[1] = rb_time_timespec(args.mtime);
    }
    args.tsp = tsp;

    return apply2files(utime_internal, argc, argv, &args);
}