#! /bin/bash -u
# nut-journal Display NUT activity recorded by journald for
# previous complete boot and current (unfinished) boot.
# RP 2015-10-05
# 2019-07-10 RP Remove heartbeat activity from journal

# Set to -x to trace this fine piece of software
set +x

TEMPFILE=$( mktemp ); : > $TEMPFILE   # Temporary file initally empty
JOURNALCTL=journalctl
NUT_ACTIVITY="upsd|upsmon|upssched|upsdrvctl"
NOT_NUT_ACTIVITY="cupsd"
# Things we don't want to see
NOISE="CRON|heartbeat-failure-timer|created\ slice|removed\ slice|postfix"
NOISE="$NOISE|started\ session|session\ opened|session\ closed|NUT\ heartbeat|heartbeat-watcher"

WHEREIS=$( whereis -b $JOURNALCTL )
if [[ "$WHEREIS" == "$JOURNALCTL:" ]]
then echo "Sorry, I cannot find the program $JOURNALCTL needed to run this script."
     exit 1
fi

# Does user have access to journalctl for upsd?
$JOURNALCTL -b 0 -n 10 --no-pager > /dev/null
if [ $? -eq 0 ]; then : 
   else echo "        Welcome to nut-journal"
        echo "You do not seem to have access to the journal"
        echo "for system commands such as those of NUT."
        echo "Ask your system administrator to add your"
        echo "account to the systemd-journal group."
        echo "When this is done, log out and then log in"
        echo "and try again."  
        exit 1
fi

echo "        Previous complete boot through shutdown" > $TEMPFILE
$JOURNALCTL -b -1 --no-pager 2>>$TEMPFILE | grep -E "$NUT_ACTIVITY" | grep -v "$NOT_NUT_ACTIVITY" >> $TEMPFILE
# Include Journal stopped message
$JOURNALCTL -b -1 -n 1 --no-pager 2>>$TEMPFILE | tail -n 1 >> $TEMPFILE
echo "        Current boot" >> $TEMPFILE
$JOURNALCTL -b  0 --no-pager 2>>$TEMPFILE | grep -E "$NUT_ACTIVITY" | grep -v "$NOT_NUT_ACTIVITY" >> $TEMPFILE
# Send report to stdout
grep -i -v -E "$NOISE" $TEMPFILE
rm $TEMPFILE