monitoring-plugins/monitoring-plugins-2.3.1-fixing-shellcheck.patch

From 439b93049ddcfa28d7d3b8dd8085770c613aabc3 Mon Sep 17 00:00:00 2001
From: Jan Wagner <waja@cyconet.org>
Date: Fri, 6 Jan 2017 16:54:29 +0100
Subject: [PATCH 1/6] Fixing shellcheck SC2006

---
 3 files changed, 41 insertions(+), 41 deletions(-)

Index: monitoring-plugins-2.3.1/plugins-scripts/check_oracle.sh
===================================================================
--- monitoring-plugins-2.3.1.orig/plugins-scripts/check_oracle.sh
+++ monitoring-plugins-2.3.1/plugins-scripts/check_oracle.sh
@@ -8,11 +8,11 @@
 
 PATH="@TRUSTED_PATH@"
 export PATH
-PROGNAME=`basename $0`
-PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+PROGNAME=$(basename "$0")
+PROGPATH=$(echo "$0" | sed -e 's,[\\/][^\\/][^\\/]*$,,')
 REVISION="@NP_VERSION@"
 
-. $PROGPATH/utils.sh
+. "$PROGPATH"/utils.sh
 
 
 print_usage() {
@@ -29,7 +29,7 @@ print_usage() {
 }
 
 print_help() {
-  print_revision $PROGNAME $REVISION
+  print_revision "$PROGNAME" "$REVISION"
   echo ""
   print_usage
   echo ""
@@ -87,47 +87,47 @@ esac
 case "$cmd" in
 --help)
 		print_help
-    exit $STATE_OK
+    exit "$STATE_OK"
     ;;
 -h)
 		print_help
-    exit $STATE_OK
+    exit "$STATE_OK"
     ;;
 --version)
-		print_revision $PROGNAME $REVISION
-    exit $STATE_OK
+		print_revision "$PROGNAME" "$REVISION"
+    exit "$STATE_OK"
     ;;
 -V)
-		print_revision $PROGNAME $REVISION
-    exit $STATE_OK
+		print_revision "$PROGNAME" "$REVISION"
+    exit "$STATE_OK"
     ;;
 esac
 
 # Hunt down a reasonable ORACLE_HOME
 if [ -z "$ORACLE_HOME" ] ; then
-	# Adjust to taste
-	for oratab in /var/opt/oracle/oratab /etc/oratab
-	do
-	[ ! -f $oratab ] && continue
-	ORACLE_HOME=`IFS=:
-		while read SID ORACLE_HOME junk;
-		do
-			if [ "$SID" = "$2" -o "$SID" = "*" ] ; then
-				echo $ORACLE_HOME;
-				exit;
-			fi;
-		done < $oratab`
-	[ -n "$ORACLE_HOME" ] && break
-	done
+    # Adjust to taste
+    for oratab in /var/opt/oracle/oratab /etc/oratab
+    do
+    [ ! -f $oratab ] && continue
+    ORACLE_HOME=`IFS=:
+        while read -r SID ORACLE_HOME junk;
+        do
+            if [ "$SID" = "$2" ] || [ "$SID" = "*" ] ; then
+                echo "$ORACLE_HOME";
+                exit;
+            fi;
+        done < $oratab`
+    [ -n "$ORACLE_HOME" ] && break
+    done
 fi
 # Last resort
-[ -z "$ORACLE_HOME" -a -d $PROGPATH/oracle ] && ORACLE_HOME=$PROGPATH/oracle
+[ -z "$ORACLE_HOME" ] && [ -d "$PROGPATH"/oracle ] && ORACLE_HOME=$PROGPATH/oracle
 
 if [ "$cmd" != "--db" ]; then
-	if [ -z "$ORACLE_HOME" -o ! -d "$ORACLE_HOME" ] ; then
-		echo "Cannot determine ORACLE_HOME for sid $2"
-		exit $STATE_UNKNOWN
-	fi
+    if [ -z "$ORACLE_HOME" ] || [ ! -d "$ORACLE_HOME" ] ; then
+	echo "Cannot determine ORACLE_HOME for sid $2"
+        exit "$STATE_UNKNOWN"
+    fi
 fi
 PATH=$PATH:$ORACLE_HOME/bin
 LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib
@@ -135,81 +135,81 @@ export ORACLE_HOME PATH LD_LIBRARY_PATH
 
 case "$cmd" in
 --tns)
-    tnschk=` tnsping $2`
-    tnschk2=` echo  $tnschk | grep -c OK`
-    if [ ${tnschk2} -eq 1 ] ; then 
-	tnschk3=${tnschk##*(}; tnschk3=${tnschk3%)*}
-	echo "OK - reply time ${tnschk3} from $2"
-	exit $STATE_OK
+    tnschk=$(tnsping "$2")
+    tnschk2=$(echo  "$tnschk" | grep -c OK)
+    if [ "${tnschk2}" -eq 1 ] ; then
+        tnschk3=${tnschk##*(}; tnschk3=${tnschk3%)*}
+        echo "OK - reply time ${tnschk3} from $2"
+        exit "$STATE_OK"
     else
-	echo "No TNS Listener on $2"
-	exit $STATE_CRITICAL
+        echo "No TNS Listener on $2"
+        exit "$STATE_CRITICAL"
     fi
     ;;
 --oranames)
-    namesctl status $2 | awk '
+    namesctl status "$2" | awk '
     /Server has been running for:/ {
-	msg = "OK: Up"
-	for (i = 6; i <= NF; i++) {
-	    msg = msg " " $i
-	}
-	status = '$STATE_OK'
+    msg = "OK: Up"
+    for (i = 6; i <= NF; i++) {
+        msg = msg " " $i
+    }
+	status = '"$STATE_OK"'
     }
     /error/ {
-	msg = "CRITICAL: " $0
-	status = '$STATE_CRITICAL'
+        msg = "CRITICAL: " $0
+        status = '"$STATE_CRITICAL"'
     }
     END {
-	print msg
-	exit status
+        print msg
+        exit status
     }'
     ;;
 --db)
-    pmonchk=`ps -ef | grep -v grep | grep -E -c "(asm|ora)_pmon_${2}$"`
-    if [ ${pmonchk} -ge 1 ] ; then
-	echo "${2} OK - ${pmonchk} PMON process(es) running"
-	exit $STATE_OK
+    pmonchk=$(pgrep -f "(asm|ora)_pmon_${2}$")
+    if [ "${pmonchk}" -ge 1 ] ; then
+        echo "${2} OK - ${pmonchk} PMON process(es) running"
+        exit "$STATE_OK"
     #if [ -f $ORACLE_HOME/dbs/sga*${2}* ] ; then
-	#if [ ${pmonchk} -eq 1 ] ; then
+         #if [ ${pmonchk} -eq 1 ] ; then
     #utime=`ls -la $ORACLE_HOME/dbs/sga*$2* | cut -c 43-55`
-	    #echo "${2} OK - running since ${utime}"
-	    #exit $STATE_OK
-	#fi
+            #echo "${2} OK - running since ${utime}"
+            #exit $STATE_OK
+         #fi
     else
-	echo "${2} Database is DOWN"
-	exit $STATE_CRITICAL
+        echo "${2} Database is DOWN"
+        exit "$STATE_CRITICAL"
     fi
     ;;
 --login)
-    loginchk=`sqlplus dummy/user@$2 < /dev/null`
-    loginchk2=` echo  $loginchk | grep -c ORA-01017`
-    if [ ${loginchk2} -eq 1 ] ; then 
-	echo "OK - dummy login connected"
-	exit $STATE_OK
+    loginchk=$(sqlplus dummy/user@"$2" < /dev/null)
+    loginchk2=$(echo "$loginchk" | grep -c ORA-01017)
+    if [ "${loginchk2}" -eq 1 ] ; then
+        echo "OK - dummy login connected"
+        exit "$STATE_OK"
     else
-	loginchk3=` echo "$loginchk" | grep "ORA-" | head -1`
-	echo "CRITICAL - $loginchk3"
-	exit $STATE_CRITICAL
+        loginchk3=$(echo "$loginchk" | grep "ORA-" | head -1)
+        echo "CRITICAL - $loginchk3"
+        exit "$STATE_CRITICAL"
     fi
     ;;
 --connect)
-    connectchk=`sqlplus $2 < /dev/null`
-    connectchk2=` echo  $connectchk | grep -c ORA-`
-    if [ ${connectchk2} -eq 0 ] ; then
-	echo "OK - login successful"
-	exit $STATE_OK
+    connectchk=$(sqlplus "$2" < /dev/null)
+    connectchk2=$(echo "$connectchk" | grep -c ORA-)
+    if [ "${connectchk2}" -eq 0 ] ; then
+        echo "OK - login successful"
+        exit "$STATE_OK"
     else
-	connectchk3=` echo "$connectchk" | grep "ORA-" | head -1`
-	echo "CRITICAL - $connectchk3"
-	exit $STATE_CRITICAL
+        connectchk3=$(echo "$connectchk" | grep "ORA-" | head -1)
+        echo "CRITICAL - $connectchk3"
+        exit "$STATE_CRITICAL"
     fi
     ;;
 --cache)
-    if [ ${5} -gt ${6} ] ; then
-	echo "UNKNOWN - Warning level is less then Crit"
-	exit $STATE_UNKNOWN
+    if [ "${5}" -gt "${6}" ] ; then
+        echo "UNKNOWN - Warning level is less then Crit"
+        exit "$STATE_UNKNOWN"
     fi
-    result=`sqlplus -s ${3}/${4}@${2} << EOF
+    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
 set pagesize 0
 set numf '9999999.99'
 select (1-(pr.value/(dbg.value+cg.value)))*100
@@ -219,48 +219,48 @@ and dbg.name='db block gets'
 and cg.name='consistent gets';
 EOF`
 
-    if [ -n "`echo $result | grep ORA-`" ] ; then
-      error=` echo "$result" | grep "ORA-" | head -1`
-      echo "CRITICAL - $error"
-      exit $STATE_CRITICAL
+    if echo "$result" | grep -q 'ORA-' ; then
+        error=$(echo "$result" | grep "ORA-" | head -1)
+        echo "CRITICAL - $error"
+        exit "$STATE_CRITICAL"
     fi
 
-    buf_hr=`echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}'` 
-    buf_hrx=`echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}'` 
-    result=`sqlplus -s ${3}/${4}@${2} << EOF
+    buf_hr=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}')
+    buf_hrx=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}')
+    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
 set pagesize 0
 set numf '9999999.99'
 select sum(lc.pins)/(sum(lc.pins)+sum(lc.reloads))*100
 from v\\$librarycache lc;
 EOF`
-	
-    if [ -n "`echo $result | grep ORA-`" ] ; then
-      error=` echo "$result" | grep "ORA-" | head -1`
-      echo "CRITICAL - $error"
-      exit $STATE_CRITICAL
-    fi
-
-    lib_hr=`echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}'`
-    lib_hrx=`echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}'`
-
-    if [ $buf_hr -le ${5} -o $lib_hr -le ${5} ] ; then
-  	echo "${2} CRITICAL - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
-	exit $STATE_CRITICAL
-    fi
-    if [ $buf_hr -le ${6} -o $lib_hr -le ${6} ] ; then
-  	echo "${2} WARNING  - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
-	exit $STATE_WARNING
+
+    if echo "$result" | grep -q 'ORA-' ; then
+        error=$(echo "$result" | grep "ORA-" | head -1)
+        echo "CRITICAL - $error"
+        exit "$STATE_CRITICAL"
+    fi
+
+    lib_hr=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print int($1)}')
+    lib_hrx=$(echo "$result" | awk '/^[0-9\. \t]+$/ {print $1}')
+
+    if [ "$buf_hr" -le "${5}" ] || [ "$lib_hr" -le "${5}" ] ; then
+        echo "${2} CRITICAL - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
+        exit "$STATE_CRITICAL"
+    fi
+    if [ "$buf_hr" -le "${6}" ] || [ "$lib_hr" -le "${6}" ] ; then
+        echo "${2} WARNING  - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
+        exit "$STATE_WARNING"
     fi
     echo "${2} OK - Cache Hit Rates: $lib_hrx% Lib -- $buf_hrx% Buff|lib=$lib_hrx%;${6};${5};0;100 buffer=$buf_hrx%;${6};${5};0;100"
 
-    exit $STATE_OK
+    exit "$STATE_OK"
     ;;
 --tablespace)
-    if [ ${6} -lt ${7} ] ; then
-	echo "UNKNOWN - Warning level is more then Crit"
-	exit $STATE_UNKNOWN
+    if [ "${6}" -lt "${7}" ] ; then
+        echo "UNKNOWN - Warning level is more then Crit"
+        exit "$STATE_UNKNOWN"
     fi
-    result=`sqlplus -s ${3}/${4}@${2} << EOF
+    result=`sqlplus -s "${3}"/"${4}"@"${2}" << EOF
 set pagesize 0
 set numf '9999999.99'
 select NVL(b.free,0.0),a.total,100 - trunc(NVL(b.free,0.0)/a.total * 1000) / 10 prc
@@ -273,32 +273,32 @@ from dba_free_space group by tablespace_
 ON a.tablespace_name=b.tablespace_name WHERE a.tablespace_name='${5}';
 EOF`
 
-    if [ -n "`echo $result | grep ORA-`" ] ; then
-      error=` echo "$result" | grep "ORA-" | head -1`
-      echo "CRITICAL - $error"
-      exit $STATE_CRITICAL
+    if echo "$result" | grep -q 'ORA-' ; then
+        error=$(echo "$result" | grep "ORA-" | head -1)
+        echo "CRITICAL - $error"
+        exit "$STATE_CRITICAL"
     fi
 
-    ts_free=`echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($1)}'` 
-    ts_total=`echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($2)}'` 
-    ts_pct=`echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($3)}'` 
-    ts_pctx=`echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print $3}'` 
-    if [ "$ts_free" -eq 0 -a "$ts_total" -eq 0 -a "$ts_pct" -eq 0 ] ; then
+    ts_free=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($1)}')
+    ts_total=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($2)}')
+    ts_pct=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print int($3)}')
+    ts_pctx=$(echo "$result" | awk '/^[ 0-9\.\t ]+$/ {print $3}')
+    if [ "$ts_free" -eq 0 ] && [ "$ts_total" -eq 0 ] && [ "$ts_pct" -eq 0 ] ; then
         echo "No data returned by Oracle - tablespace $5 not found?"
-        exit $STATE_UNKNOWN
+        exit "$STATE_UNKNOWN"
     fi
-    if [ "$ts_pct" -ge ${6} ] ; then
-  	echo "${2} : ${5} CRITICAL - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
-	exit $STATE_CRITICAL
-    fi
-    if [ "$ts_pct" -ge ${7} ] ; then
-  	echo "${2} : ${5} WARNING  - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
-	exit $STATE_WARNING
+    if [ "$ts_pct" -ge "${6}" ] ; then
+        echo "${2} : ${5} CRITICAL - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
+        exit "$STATE_CRITICAL"
+    fi
+    if [ "$ts_pct" -ge "${7}" ] ; then
+        echo "${2} : ${5} WARNING  - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
+        exit "$STATE_WARNING"
     fi
     echo "${2} : ${5} OK - $ts_pctx% used [ $ts_free / $ts_total MB available ]|${5}=$ts_pctx%;${7};${6};0;100"
-    exit $STATE_OK
+    exit "$STATE_OK"
     ;;
 *)
     print_usage
-		exit $STATE_UNKNOWN
+		exit "$STATE_UNKNOWN"
 esac
Index: monitoring-plugins-2.3.1/plugins-scripts/check_sensors.sh
===================================================================
--- monitoring-plugins-2.3.1.orig/plugins-scripts/check_sensors.sh
+++ monitoring-plugins-2.3.1/plugins-scripts/check_sensors.sh
@@ -2,46 +2,46 @@
 
 PATH="@TRUSTED_PATH@"
 export PATH
-PROGNAME=`basename $0`
-PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+PROGNAME=$(basename "$0")
+PROGPATH=$(echo "$0" | sed -e 's,[\\/][^\\/][^\\/]*$,,')
 REVISION="@NP_VERSION@"
 
-. $PROGPATH/utils.sh
+. "$PROGPATH"/utils.sh
 
 print_usage() {
 	echo "Usage: $PROGNAME" [--ignore-fault]
 }
 
 print_help() {
-	print_revision $PROGNAME $REVISION
+	print_revision "$PROGNAME" "$REVISION"
 	echo ""
 	print_usage
 	echo ""
 	echo "This plugin checks hardware status using the lm_sensors package."
 	echo ""
 	support
-	exit $STATE_OK
+	exit "$STATE_OK"
 }
 
 case "$1" in
 	--help)
 		print_help
-		exit $STATE_OK
+		exit "$STATE_OK"
 		;;
 	-h)
 		print_help
-		exit $STATE_OK
+		exit "$STATE_OK"
 		;;
 	--version)
-		print_revision $PROGNAME $REVISION
-		exit $STATE_OK
+		print_revision "$PROGNAME" "$REVISION"
+		exit "$STATE_OK"
 		;;
 	-V)
-		print_revision $PROGNAME $REVISION
-		exit $STATE_OK
+		print_revision "$PROGNAME" "$REVISION"
+		exit "$STATE_OK"
 		;;
 	*)
-		sensordata=`sensors 2>&1`
+		sensordata=$(sensors 2>&1)
 		status=$?
 		if test ${status} -eq 127; then
 			text="SENSORS UNKNOWN - command not found (did you install lmsensors?)"
@@ -49,10 +49,10 @@ case "$1" in
 		elif test ${status} -ne 0; then
 			text="WARNING - sensors returned state $status"
 			exit=$STATE_WARNING
-		elif echo ${sensordata} | egrep ALARM > /dev/null; then
+		elif echo "${sensordata}" | egrep ALARM > /dev/null; then
 			text="SENSOR CRITICAL - Sensor alarm detected!"
 			exit=$STATE_CRITICAL
-		elif echo ${sensordata} | egrep FAULT > /dev/null \
+		elif echo "${sensordata}" | egrep FAULT > /dev/null \
 		    && test "$1" != "-i" -a "$1" != "--ignore-fault"; then
 			text="SENSOR UNKNOWN - Sensor reported fault"
 			exit=$STATE_UNKNOWN
@@ -63,8 +63,8 @@ case "$1" in
 
 		echo "$text"
 		if test "$1" = "-v" -o "$1" = "--verbose"; then
-			echo ${sensordata}
+			echo "${sensordata}"
 		fi
-		exit $exit
+		exit "$exit"
 		;;
 esac
Index: monitoring-plugins-2.3.1/plugins-scripts/check_log.sh
===================================================================
--- monitoring-plugins-2.3.1.orig/plugins-scripts/check_log.sh
+++ monitoring-plugins-2.3.1/plugins-scripts/check_log.sh
@@ -60,11 +60,11 @@
 
 PATH="@TRUSTED_PATH@"
 export PATH
-PROGNAME=`basename $0`
-PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+PROGNAME=$(basename $0)
+PROGPATH=$(echo "$0" | sed -e 's,[\\/][^\\/][^\\/]*$,,')
 REVISION="@NP_VERSION@"
 
-. $PROGPATH/utils.sh
+. "$PROGPATH"/utils.sh
 
 print_usage() {
     echo "Usage: $PROGNAME -F logfile -O oldlog -q query"
@@ -73,7 +73,7 @@ print_usage() {
 }
 
 print_help() {
-    print_revision $PROGNAME $REVISION
+    print_revision "$PROGNAME" "$REVISION"
     echo ""
     print_usage
     echo ""
@@ -87,7 +87,7 @@ print_help() {
 
 if [ $# -lt 1 ]; then
     print_usage
-    exit $STATE_UNKNOWN
+    exit "$STATE_UNKNOWN"
 fi
 
 # Grab the command line arguments
@@ -100,19 +100,19 @@ while test -n "$1"; do
     case "$1" in
         --help)
             print_help
-            exit $STATE_OK
+            exit "$STATE_OK"
             ;;
         -h)
             print_help
-            exit $STATE_OK
+            exit "$STATE_OK"
             ;;
         --version)
-            print_revision $PROGNAME $REVISION
-            exit $STATE_OK
+            print_revision "$PROGNAME" "$REVISION"
+            exit "$STATE_OK"
             ;;
         -V)
-            print_revision $PROGNAME $REVISION
-            exit $STATE_OK
+            print_revision "$PROGNAME" "$REVISION"
+            exit "$STATE_OK"
             ;;
         --filename)
             logfile="$2"
@@ -149,7 +149,7 @@ while test -n "$1"; do
         *)
             echo "Unknown argument: $1"
             print_usage
-            exit $STATE_UNKNOWN
+            exit "$STATE_UNKNOWN"
             ;;
     esac
     shift
@@ -159,10 +159,10 @@ done
 
 if [ ! -e "$logfile" ]; then
     echo "Log check error: Log file $logfile does not exist!"
-    exit $STATE_UNKNOWN
+    exit "$STATE_UNKNOWN"
 elif [ ! -r "$logfile" ] ; then
     echo "Log check error: Log file $logfile is not readable!"
-    exit $STATE_UNKNOWN
+    exit "$STATE_UNKNOWN"
 fi
 
 # If the old log file doesn't exist, this must be the first time
@@ -172,7 +172,7 @@ fi
 if [ ! -e "$oldlog" ]; then
     cat "$logfile" > "$oldlog"
     echo "Log check data initialized..."
-    exit $STATE_OK
+    exit "$STATE_OK"
 fi
 
 # The old log file exists, so compare it to the original log now
@@ -180,9 +180,9 @@ fi
 # The temporary file that the script should use while
 # processing the log file.
 if [ -x /bin/mktemp ]; then
-    tempdiff=`/bin/mktemp /tmp/check_log.XXXXXXXXXX`
+    tempdiff=$(/bin/mktemp /tmp/check_log.XXXXXXXXXX)
 else
-    tempdiff=`/bin/date '+%H%M%S'`
+    tempdiff=$(/bin/date '+%H%M%S')
     tempdiff="/tmp/check_log.${tempdiff}"
     touch "$tempdiff"
     chmod 600 "$tempdiff"
@@ -191,20 +191,20 @@ fi
 diff "$logfile" "$oldlog" | grep -v "^>" > "$tempdiff"
 
 # Count the number of matching log entries we have
-count=`grep -c "$query" "$tempdiff"`
+count=$(grep -c "$query" "$tempdiff")
 
 # Get the last matching entry in the diff file
-lastentry=`grep "$query" "$tempdiff" | tail -1`
+lastentry=$(grep "$query" "$tempdiff" | tail -1)
 
 rm -f "$tempdiff"
 cat "$logfile" > "$oldlog"
 
 if [ "$count" = "0" ]; then # no matches, exit with no error
     echo "Log check ok - 0 pattern matches found"
-    exitstatus=$STATE_OK
+    exitstatus="$STATE_OK"
 else # Print total matche count and the last entry we found
     echo "($count) $lastentry"
-    exitstatus=$STATE_CRITICAL
+    exitstatus="$STATE_CRITICAL"
 fi
 
-exit $exitstatus
+exit "$exitstatus"