LDM Product-queue Refresh Script

ldm.service

[Unit]

Description=Unidata Local Data Manager

After=network.target remote-fs.target nss-lookup.target



[Service]

Type=forking

ExecStartPre=/home/ldm/scripts/pqrefresh.sh

ExecStartPre=/home/ldm/bin/ldmadmin mkqueue

ExecStart=/home/ldm/bin/ldmadmin start

ExecStop=/home/ldm/bin/ldmadmin stop

PIDFile=/home/ldm/ldmd.pid

Restart=on-failure

SuccessExitStatus=1

User=ldm



[Install]

WantedBy=multi-user.target

pqrefresh.sh

#!/bin/sh

export PATH=/bin:/usr/bin

LDMHOME=/home/ldm
LDMBIN=$LDMHOME/bin
LDMADMIN=$LDMBIN/ldmadmin
PQCHECK=$LDMBIN/pqcheck
PQCAT=$LDMBIN/pqcat
PQ=/dev/shm/ldm.pq

echo 'Inspecting LDM product-queue...'
if [ -x $LDMADMIN ] ; then
    if $LDMADMIN isrunning; then
            echo "LDM system is currently running. Aborting."
    else
        if [ ! -f $PQ ] ; then
        	echo "Product-queue doesn't exist.  Creating..."
        	if ! $LDMADMIN mkqueue; then
        	    echo "Aborting..."
        	    exit 1
        	fi
        else
        	echo "Product-queue exists. Checking..."
        	#
        	# Test the product-queue for corruption.
        	#
        	if ! $PQCHECK -l /dev/null -q $PQ; then
        	    case $? in
        	    0)  echo "The product-queue is okay."
        	        exit 0
              		;;
        	    1)  echo "System error checking product-queue.  Aborting..."
            		exit 1
            		;;
        	    2)  echo "Adding writer-counter to product-queue..."
            		if ! $PQCHECK -F -q $PQ; then
            		    echo "Aborting..."
            		    exit 1
            		fi
            		;;
        	    3)  echo "Product-queue was incorrectly closed.  " \
        		    "Checking..."
            		if $PQCAT -s -l /dev/null; then
            		    echo "Product-queue appears OK. "
            		    echo "Clearing writer-counter..."
            		    if ! $PQCHECK -F -q $PQ; then
            			echo "Couldn't clear counter.  Aborting..."
            			exit 1
            		    fi
            		else
            		    echo "Product-queue appears corrupt.  Deleting."
            		    rm $PQ
            		    if ! "$LDMADMIN mkqueue -f"; then
            			echo "Couldn't make new product-queue.  Aborting..."
            			exit 1
            		    fi
            		fi
        		    ;;
        	    4)  echo "Product-queue is corrupt.  Deleting."
            		rm $PQ
            		if ! "$LDMADMIN mkqueue -f"; then
            		    echo "Couldn't make new product-queue.  Aborting..."
            		    exit 1
            		fi
            		;;
        	    esac
        	fi
        fi
        $LDMADMIN clean
    fi
fi