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