busybox/examples/var_service/ntpd/ntp.script

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#!/bin/sh
exec 2>/dev/null
echo "`tail -n 99 "$0.log"`" >"$0.log"
exec >>"$0.log"
exec 2>&1
dt=`date '+%Y-%m-%d %H:%M:%S'`
if test x"$stratum" != x"" \
&& test x"$poll_interval" != x"" \
&& test 4 -ge "$stratum" \
&& test 128 -le "$poll_interval" \
; then
echo "$dt: $1"\
"freq_drift_ppm=$freq_drift_ppm"\
"offset=$offset"\
"stratum=$stratum"\
"poll_interval=$poll_interval,"\
"setting hardware clock"
exec hwclock --systohc
fi
echo "$dt: $1"\
"freq_drift_ppm=$freq_drift_ppm"\
"offset=$offset"\
"stratum=$stratum"\
"poll_interval=$poll_interval"\