From 3828a94a3e765c1457b9b7d0de766e41b4dbbb49 Mon Sep 17 00:00:00 2001
From: Tomas Edwardsson <tommi@tommi.org>
Date: Wed, 22 May 2013 21:23:50 +0000
Subject: [PATCH] Emit unknown if unable to open the logfile and detect
 location

Issue #1
---
 check_nagios/check_nagios_ghostservices | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/check_nagios/check_nagios_ghostservices b/check_nagios/check_nagios_ghostservices
index f1a67cb..4e2352e 100755
--- a/check_nagios/check_nagios_ghostservices
+++ b/check_nagios/check_nagios_ghostservices
@@ -3,7 +3,29 @@ TMP=`mktemp`
 LAST_HOUR=`date "+%b %e %H:" -d "1 hour ago"`
 CURRENT_HOUR=`date "+%b %e %H:"`
 
-tail -n 2000 /var/log/messages | \
+exit_unknown() {
+	msg="$1"
+
+	echo "${msg}"
+	exit 3
+}
+
+find_nagios_log() {
+	# Try to locate the nagios log, fallback to messages log
+	for log in /var/log/nagios/nagios.log /var/log/nagios3/nagios.log /var/log/messages
+	do
+		if [ -e "${log}" ]; then
+			echo ${log}
+			return 0
+		fi
+	done
+	return 3
+}
+
+LOG=$(find_nagios_log) || exit_unknown "Unable to locate logfile for parsing"
+
+tail -n 1 ${LOG} &> ${TMP} || exit_unknown "Unable to parse logfile: $(cat ${TMP})"
+tail -n 2000 ${LOG} | \
 grep -E "$CURRENT_HOUR|$LAST_HOUR" | \
 grep "Passive check result was received" | \
 grep -i "could not be found"  | \