#!/bin/sh
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DAEMON="sntp"
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# sntp uses all the IPs resolved for the hostname (i.e. pool.ntp.org has 4).
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# It will try each until they either all timeout or time has been set. Thus
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# default to only providing one NTP pool host.
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SNTP_SERVERS="pool.ntp.org"
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# Step if time delta is greater then 128ms, otherwise slew
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SNTP_ARGS="-Ss -M 128"
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SNTP_KEY_CACHE="/tmp/kod"
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# shellcheck source=/dev/null
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[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
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start() {
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printf 'Starting %s: ' "$DAEMON"
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# Create key cache file to prevents warning that file is missing
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touch $SNTP_KEY_CACHE
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# shellcheck disable=SC2086 # we need the word splitting
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/usr/bin/$DAEMON $SNTP_ARGS -K $SNTP_KEY_CACHE $SNTP_SERVERS
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# sntp behavior
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# - Does not background
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# - Does not infinitely block
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# - Time-out w/o network = ~2 sec
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# - Time-out w/ network = ~5sec * # of servers
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status=$?
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if [ "$status" -eq 0 ]; then
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echo "OK"
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else
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echo "FAIL"
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fi
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return "$status"
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}
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stop() {
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echo "Nothing to do, $DAEMON is not a daemon."
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}
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restart() {
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stop
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sleep 1
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start
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}
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reload() {
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echo "Nothing to do, $DAEMON does not support reload."
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}
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case "$1" in
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start|stop|restart|reload)
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"$1";;
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*)
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echo "Usage: $0 {start|stop|restart|reload}"
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exit 1
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esac
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