utimeの実験

unsigned long read_value_at_address(unsigned long int address) {
	unsigned long value = 0;
	int fd;
	int ret;
	char dummy[] = "/data/local/tmp/dummy.txt";
	struct stat buf;

	fd = open(dummy, O_CREAT, 0666);
	if (fd < 0) {
		fprintf(stderr, "open %s failed: %s.\n", dummy, strerror(errno));
	} else {
		close(fd);
	}

	ret = utime(dummy, (struct utimbuf *)address);
	/* ↑これはSegmentation faultが発生する */
	if (ret < 0) {
		fprintf(stderr, "utime failed: %s.\n", strerror(errno));
	}

	stat(dummy, &buf);
	value = (unsigned long)buf.st_atime;

	return value;
}