rem: return EINVAL;
add: return FS_EINVAL;
context: do_copytest(int argc, char **argv){    char *fromPath = "/boot/apps/internet/mozilla";	if (argc > 2) {		printf("usage: copytest <path>");		return EINVAL;	} else if (argc == 2)		fromPath = argv[1];	else		printf("copying from: %s\n", fromPath);	return copydir(fromPath, "/myfs");}