Provided by: ntpsec_1.1.0+dfsg1-1_amd64
ntpwait - wait for ntpd to stabilize the system clock
ntpwait [-v] [-n number] [-s secs]
The ntpwait program blocks until ntpd is in synchronized state. This can be useful at boot time, to delay the boot sequence until after "ntpd -g" has set the time. ntpwait will send at most number queries to ntpd(8), sleeping for secs seconds after each status return that says ntpd(8) has not yet produced a synchronized and stable system clock. ntpwait will do this quietly, unless the -v flag is provided.
-n number, --tries=number Number of times to check ntpd. This option takes an integer number as its argument. The default number for this option is: 100. The maximum number of times we will check ntpd to see if it has been able to synchronize and stabilize the system clock. -s secs-between-tries, --sleep=secs-between-tries How long to sleep between tries. This option takes an integer number as its argument. The default secs-between-tries for this option is: 6. We will sleep for secs-between-tries after each query of ntpd that returns "the time is not yet stable". -v, --verbose Be verbose. By default, ntpwait is silent. With this option, ntpwait will provide status information, including time to synchronization in seconds.
If you are running Python at a version older than 3.3, the report on time to synchronization may be thrown off by NTP clock stepping.
One of the following exit values will be returned: 0 Successful program execution. 1 The operation failed or the command syntax was not valid. 2 Operation was interrupted by signal.