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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2015-03-31 22:00:55 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2015-03-31 22:00:55 +0200 |
| commit | 1186894f773e13ab9ca2b3e05a194e9b88796fbe (patch) | |
| tree | 0921c07594ad42f0ab7cf147de97539fa64d92d7 /examples | |
| parent | 9472e8a86fa1837bccec9e25dd18fd3c88c5e209 (diff) | |
| download | busybox-1186894f773e13ab9ca2b3e05a194e9b88796fbe.tar.gz | |
update example ntp.script
Handle an interesting corner case when NTP server is reachable...
but on a different IP now.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'examples')
| -rwxr-xr-x | examples/var_service/ntpd/ntp.script | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/examples/var_service/ntpd/ntp.script b/examples/var_service/ntpd/ntp.script index 76c34bf74..8542181eb 100755 --- a/examples/var_service/ntpd/ntp.script +++ b/examples/var_service/ntpd/ntp.script @@ -10,12 +10,30 @@ dt=`date '+%Y-%m-%d %H:%M:%S'` +echo "`tail -n 199 -- "$0.log" 2>/dev/null`" >"$0.log.$$" + +if test x"$1" = x"unsync" \ +; then + # No replies for our NTP requests were seen for some time. + # + # Among more mundate cases like network outages, this happens + # if we ran for a LONG time (days) and ntp server's IP has changed. + # ntpd has no code to re-resolve peers' addresses to IPs, + # we need to help it: + # + echo "$dt: $1"\ + "syncronization lost, restarting ntpd"\ + >>"$0.log.$$" + mv -- "$0.log.$$" "$0.log" + kill $PPID + exit +fi + if test x"$stratum" != x"" \ && test x"$poll_interval" != x"" \ && test 4 -ge "$stratum" \ && test 128 -le "$poll_interval" \ ; then - echo "`tail -n 199 -- "$0.log" 2>/dev/null`" >"$0.log.$$" echo "$dt: $1"\ "freq_drift_ppm=$freq_drift_ppm"\ "offset=$offset"\ @@ -27,7 +45,6 @@ if test x"$stratum" != x"" \ exec hwclock --systohc fi -echo "`tail -n 199 -- "$0.log" 2>/dev/null`" >"$0.log.$$" echo "$dt: $1"\ "freq_drift_ppm=$freq_drift_ppm"\ "offset=$offset"\ |