int main(int argc, char **argv) {
int opt, only_query, timeout;
struct timeval timeout_tv;
in_addr_t addr;
only_query = 0;
timeout = MODOPS_TIMEOUT;
getopt_init();
while (-1 != (opt = getopt(argc, argv, "hqt:"))) {
switch (opt) {
default:
return -EINVAL;
case 'h':
printf("Usage: %s [-q] server", argv[0]);
return 0;
case 'q': /* Query only - don't set the clock */
only_query = 1;
break;
case 't': /* Maximum time waiting for a server response */
if (1 != sscanf(optarg, "%d", &timeout)) {
printf("%s: error: wrong -t argument %s\n",
argv[0], optarg);
return -EINVAL;
}
break;
}
}
if (optind >= argc) {
printf("%s: error: no server specified\n", argv[0]);
return -EINVAL;
}
else if (!inet_aton(argv[optind], (struct in_addr *)&addr)) {
printf("%s: error: invalid address %s\n", argv[0],
argv[optind]);
return -EINVAL;
}
timeout_tv.tv_sec = timeout / MSEC_PER_SEC;
timeout_tv.tv_usec = (timeout % MSEC_PER_SEC) * USEC_PER_MSEC;
return ntpdate(addr, &timeout_tv, only_query);
}
int main() {
ntpdate();
return 0;
}
