What's the easiest way to make Busybox keep correct time?

[Denys Vlasenko]

$ busybox ntpd --help
BusyBox v1.22.1 (2014-02-01 19:25:19 CET) multi-call binary.

Usage: ntpd [-dnqNwl] [-S PROG] [-p PEER]...

NTP client/server

    -d    Verbose
    -n    Do not daemonize
    -q    Quit after clock is set
    -N    Run at high priority
    -w    Do not set time (only query peers), implies -n
    -l    Run as server on port 123
    -p PEER    Obtain time from PEER (may be repeated)
    -S PROG    Run PROG after stepping time, stratum change, and every 11 mins
^^^^^^^^^^^^^^^^^^
    use this to periodically set the hw clock