lfmergeqm

#!/bin/sh
# LfMerge Queue Manager

PIDFILE=/tmp/run/lfmerge.pid
HANG_THRESHHOLD_SECONDS=300

if [ -f "$PIDFILE" ]
then
  # When was the last run of the queue manager? Can't trust the PID file's timestamp (it writes local time as UTC), so get it from journalctl
  PID_QM=$(grep -o '"PID":[[:digit:]]*' "$PIDFILE" | grep -o '[[:digit:]]*')
  TIMESTAMP_QM_MICROSECONDS=$(journalctl _PID=$PID_QM -t LfMergeQueueManager -o json | head -n 1 | grep -o '"__REALTIME_TIMESTAMP" : "[[:digit:]]*"' | grep -o '[[:digit:]]*')
  TIMESTAMP_QM_SECONDS=$(echo $TIMESTAMP_QM_MICROSECONDS | rev | cut -c7- | rev)

  # Now find the first run of LfMerge after that queue manager, and check if that run has hung
  PID_LFM=$(journalctl --since="@$TIMESTAMP_QM_SECONDS" -t LfMerge -o json | head -n 1 | grep -o '"_PID" : "[[:digit:]]*"' | grep -o '[[:digit:]]*')
  LAST_TIMESTAMP_LFM_MICROSECONDS=$(journalctl _PID=$PID_LFM -t LfMerge -o json | tail -n 1 | grep -o '"__REALTIME_TIMESTAMP" : "[[:digit:]]*"' | grep -o '[[:digit:]]*')
  LAST_TIMESTAMP_LFM_SECONDS=$(echo $LAST_TIMESTAMP_LFM_MICROSECONDS | rev | cut -c7- | rev)
  LAST_MSG_LFM=$(journalctl _PID=$PID_LFM -t LfMerge -o cat | tail -n 1)

  # In real code, remove the -v because we want to only trigger if this actually *IS* the last message
  echo "$LAST_MSG_LFM" | grep "^About to dispose FW project" > /dev/null
  if [ $? = 0 ]
  then
    # Looks like a hung LfMerge, but make sure we're past the threshhold
    NOW_SECONDS=$(date +%s)
    if (( LAST_TIMESTAMP_LFM_SECONDS + HANG_THRESHHOLD_SECONDS < NOW_SECONDS ))
    then
      # Past the threshhold; kill the old processes (both LfMerge and the queue manager)
      kill $PID_LFM $PID_QM 2>/dev/null
      sleep 1
      rm -f "$PIDFILE"
    fi
  fi
fi

if [ -z "$DBVERSION" ]; then
	DBVERSION=$(basename $(find /usr/lib/lfmerge -maxdepth 1 -type d -name [0-9]\* | sort | tail -n 1))
fi
LIB=/usr/lib/lfmerge/$DBVERSION
SHARE=/usr/share/lfmerge/$DBVERSION

cd "$SHARE"
RUNMODE=INSTALLED
. ./environ
cd "$LIB"

exec "$LIB"/LfMergeQueueManager "$@"