3 # Copyright 2016 Peter Palfrader
5 # Permission is hereby granted, free of charge, to any person obtaining
6 # a copy of this software and associated documentation files (the
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8 # without limitation the rights to use, copy, modify, merge, publish,
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10 # permit persons to whom the Software is furnished to do so, subject to
11 # the following conditions:
13 # The above copyright notice and this permission notice shall be
14 # included in all copies or substantial portions of the Software.
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38 Check NTP sync status (per timedatectl's output) and offset to RTC clock.
39 The latter is particularly interesting for VMs.
41 -o <secs> Maximum offset to tolerate (Default: $MAX)
42 -s Check sync status only, do not diff against RTC.
48 while getopts o:sh opt ; do
51 s) SYNSTATUSONLY="1";;
55 shift $(($OPTIND - 1))
56 if [ "$#" -gt 0 ]; then
62 trap "rm -f '$temp'" EXIT
65 ut=$(sed '/Universal time:/ { s/^[^:]*: *//; p}; d' "$temp")
66 rtc=$(sed '/RTC time:/ { s/^[^:]*: *//; p}; d' "$temp")
67 ntpenabled=$(sed '/\(NTP enabled\|Network time on\):/ { s/^[^:]*: *//; p}; d' "$temp")
68 ntpsynced=$(sed '/NTP synchronized:/ { s/^[^:]*: *//; p}; d' "$temp")
70 uts=$(TZ=UTC date -d "$ut" +%s)
71 rtcs=$(TZ=UTC date -d "$rtc" +%s)
74 if [ "$SYNSTATUSONLY" -ge 1 ]; then
75 if [ "$ntpsynced" != "yes" ]; then
76 echo "Warning: not synced with NTP."
80 if [ "$delta" -lt "-$MAX" ] ||
81 [ "$delta" -gt "$MAX" ]; then
82 echo "Warning: time desync $delta: RTC vs. system time: $rtc vs. $ut"
86 if [ "$ntpenabled" != "yes" ]; then
87 echo "Warning: NTP not enabled!"
91 if [ "$ntpsynced" != "yes" ]; then
92 echo "Warning: not synced with NTP (but clock is OK for now)."
97 echo "OK: synced at $ut."