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ntpquery: Add a -s flag to make it adjust the time

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This commit is contained in:
Nico Weber 2020-09-06 10:02:45 -04:00 committed by Andreas Kling
parent 0fff4e11a6
commit f1a6884a51
1 changed files with 20 additions and 2 deletions
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22
Userland/ntpquery.cpp
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@ -100,24 +100,33 @@ static String format_ntp_timestamp(NtpTimestamp ntp_timestamp)
int main(int argc, char** argv)
{
if (pledge("stdio inet dns", nullptr) < 0) {
if (pledge("stdio inet dns settime", nullptr) < 0) {
perror("pledge");
return 1;
}
bool set_time = false;
// FIXME: Change to serenityos.pool.ntp.org once https://manage.ntppool.org/manage/vendor/zone?a=km5a8h&id=vz-14154g is approved.
const char* host = "time.google.com";
Core::ArgsParser args_parser;
args_parser.add_option(set_time, "Adjust system time (requires root)", "set", 's');
args_parser.add_positional_argument(host, "NTP server", "host", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
if (!set_time) {
if (pledge("stdio inet dns", nullptr) < 0) {
perror("pledge");
return 1;
}
}
auto* hostent = gethostbyname(host);
if (!hostent) {
fprintf(stderr, "Lookup failed for '%s'\n", host);
return 1;
}
if (pledge("stdio inet", nullptr) < 0) {
if (pledge(set_time ? "stdio inet settime" : "stdio inet", nullptr) < 0) {
perror("pledge");
return 1;
}
@ -180,6 +189,15 @@ int main(int argc, char** argv)
NtpTimestamp transmit_timestamp = be64toh(packet.transmit_timestamp);
NtpTimestamp destination_timestamp = ntp_timestamp_from_timeval(t);
if (set_time) {
// FIXME: Do all the time filtering described in 5905, or at least correct for time of flight.
timeval t = timeval_from_ntp_timestamp(transmit_timestamp);
if (settimeofday(&t, nullptr) < 0) {
perror("settimeofday");
return 1;
}
}
printf("NTP response from %s:\n", inet_ntoa(peer_address.sin_addr));
printf("Leap Information: %d\n", packet.li_vn_mode >> 6);
printf("Version Number: %d\n", (packet.li_vn_mode >> 3) & 7);