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
7 # "Software"), to deal in the Software without restriction, including
8 # without limitation the rights to use, copy, modify, merge, publish,
9 # distribute, sublicense, and/or sell copies of the Software, and to
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.
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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18 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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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
64 LC_ALL=C timedatectl > "$temp"
65 ut=$(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 "$rtc" +%s 2>/dev/null || echo "N/A")
72 if [ "$rtcs" != "N/A" ]; then
76 if [ "$SYNSTATUSONLY" -ge 1 ]; then
77 if [ "$ntpsynced" != "yes" ]; then
78 echo "Warning: not synced with NTP."
82 if [ "$rtcs" = "N/A" ]; then
83 echo "Warning: Cannot parse RTC $rtc."
87 if [ "$delta" -lt "-$MAX" ] ||
88 [ "$delta" -gt "$MAX" ]; then
89 echo "Warning: time desync $delta: RTC vs. system time: $rtc vs. $ut"
93 if [ "$ntpenabled" != "yes" ]; then
94 echo "Warning: NTP not enabled!"
98 if [ "$ntpsynced" != "yes" ]; then
99 echo "Warning: not synced with NTP (but clock is OK for now)."
104 echo "OK: synced at $ut."