X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-running-kernel;h=bb0fc9628f4c2480d1ea6032ede82220c168ab04;hb=e3108042c5f76acd268b02c59b52435591ede554;hp=a82774c892aca8c421883fe0e1c40708c8ba5f84;hpb=7b55505b43fe011f320960027856bbcd7a663908;p=mirror%2Fdsa-nagios.git

diff --git a/dsa-nagios-checks/checks/dsa-check-running-kernel b/dsa-nagios-checks/checks/dsa-check-running-kernel
index a82774c..bb0fc96 100755
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -3,8 +3,10 @@
 # Check if the running kernel has the same version string as the on-disk
 # kernel image.
 
-# Copyright 2008,2009 Peter Palfrader
+# Copyright 2008,2009,2011 Peter Palfrader
 # Copyright 2009 Stephen Gran
+# Copyright 2010 Uli Martens
+# Copyright 2011 Alexander Reichle-Schmehl
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -47,7 +49,7 @@ get_offset() {
 get_avail() {
 	# This is wrong, but leaves room for when we have to care for machines running
 	# myfirstunix-image-0.1-dsa-arm
-	local prefix=linux
+	local prefix="$1"; shift
 
 	local kervers=$(uname -r)
 
@@ -88,7 +90,7 @@ get_avail() {
 
 	local imagename=0
 	# --no-all-versions show shows only the candidate
-	for vers in $(apt-cache --no-all-versions show ${prefix}-image-${metavers} | grep Depends | awk '{print $2}' | sort -u); do
+	for vers in $(apt-cache --no-all-versions show ${prefix}-image-${metavers} | sed -n 's/^Depends: //p' | tr ',' '\n' | tr -d ' ' | grep ${prefix}-image | awk '{print $1}' | sort -u); do
 		if dpkg --compare-versions $vers gt $imagename; then
 			imagename=$vers
 		fi
@@ -117,13 +119,14 @@ get_avail() {
 	return 1
 }
 
-get_image() {
-	local image GZHDR1 GZHDR2 off
+get_image_linux() {
+	local image GZHDR1 GZHDR2 LZHDR off
 
 	image="$1"
 
 	GZHDR1="\x1f\x8b\x08\x00"
 	GZHDR2="\x1f\x8b\x08\x08"
+	LZHDR="\x00\x00\x00\x02\xff"
 
 	off=`get_offset "$image" $GZHDR1`
 	[ "$?" != "0" ] && off="-1"
@@ -139,23 +142,61 @@ get_image() {
 		return
 	fi
 
+	off=`get_offset "$image" $LZHDR`
+	[ "$?" != "0" ] && off="-1"
+	if [ "$off" -ne "-1" ]; then
+		(dd ibs="$[off-1]" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | lzcat 2>/dev/null
+		return
+	fi
+
 	echo "ERROR: Unable to extract kernel image." 2>&1
 	exit 1
 }
 
+
+freebsd_check_running_version() {
+	local imagefile="$1"; shift
+
+	local r="$(uname -r)"
+	local v="$(uname -v| sed -e 's/^#[0-9]*/&:/')"
+
+	local q='@\(#\)FreeBSD '"$r $v"
+
+	if zcat "$imagefile" | strings | egrep -q "$q"; then
+		echo "OK"
+	else
+		echo "not OK"
+	fi
+}
+
 searched=""
 for on_disk in \
 	"/boot/vmlinuz-`uname -r`"\
-	"/boot/vmlinux-`uname -r`"; do
+	"/boot/vmlinux-`uname -r`"\
+	"/boot/kfreebsd-`uname -r`.gz"; do
 
 	if [ -e "$on_disk" ]; then
-		on_disk_version="`get_image "$on_disk" | strings | grep 'Linux version' | head -n1`"
-		[ -z "$on_disk_version" ] || break
-		on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
-		[ -z "$on_disk_version" ] || break
-
-		echo "UNKNOWN: Failed to get a version string from image $on_disk"
-		exit $UNKNOWN
+		if [ ! -x "$(which strings)" ]; then
+			echo "UNKNOWN: 'strings' command missing, perhaps install binutils?"
+			exit $UNKNOWN
+		fi
+		if [ "${on_disk/vmlinu}" != "$on_disk" ]; then
+			on_disk_version="`get_image_linux "$on_disk" | strings | grep 'Linux version' | head -n1`"
+			if [ -x /usr/bin/lsb_release ] ; then
+				vendor=$(lsb_release -i -s)
+				if [ -n "$vendor" ] && [ "xDebian" != "x$vendor" ] ; then
+					on_disk_version=$( echo $on_disk_version|sed -e "s/ ($vendor [[:alnum:]\.-]\+ [[:alnum:]\.]\+)//")
+				fi
+			fi
+			[ -z "$on_disk_version" ] || break
+			on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
+			[ -z "$on_disk_version" ] || break
+
+			echo "UNKNOWN: Failed to get a version string from image $on_disk"
+			exit $UNKNOWN
+		else
+			on_disk_version="$(zcat $on_disk | strings | grep Debian | head -n 1 | sed -e 's/Debian [[:alnum:]]\+ (\(.*\))/\1/')"
+		fi
 	fi
 	searched="$searched $on_disk"
 done
@@ -165,22 +206,37 @@ if ! [ -e "$on_disk" ]; then
 	exit $WARNING
 fi
 
+if [ "$(uname -s)" = "Linux" ]; then
+	running_version="`cat /proc/version`"
+	if [ -z "$running_version" ] ; then
+		echo "UNKNOWN: Failed to get a version string from running system"
+		exit $UNKNOWN
+	fi
 
-running_version="`cat /proc/version`"
-if [ -z "$running_version" ] ; then
-	echo "UNKNOWN: Failed to get a version string from running system"
-	exit $UNKNOWN
-fi
+	if [ "$running_version" != "$on_disk_version" ]; then
+		echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
+		exit $WARNING
+	fi
 
-if [ "$running_version" != "$on_disk_version" ]; then
-	echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
-	exit $WARNING
-fi
+	ret="$(get_avail linux)"
+	if [ $? = 1 ]; then
+		echo "WARNING: Kernel needs upgrade [$ret]"
+		exit $WARNING
+	fi
+else
+	image_current=$(freebsd_check_running_version $on_disk)
+	running_version="`uname -s` `uname -r` `uname -v`"
+	if [ "$image_current" != "OK" ]; then
+		approx_time="$(date -d "@`stat -c '%Y' "$on_disk"`" +"%Y-%m-%d %H:%M:%S")"
+		echo "WARNING: Currently running kernel ($running_version) does not match on disk image (~ $approx_time)"
+		exit $WARNING;
+	fi
 
-ret="$(get_avail)"
-if [ $? = 1 ]; then
-	echo "WARNING: Kernel needs upgrade [$ret]"
-	exit $WARNING
+	ret="$(get_avail linux)"
+	if [ $? = 1 ]; then
+		echo "WARNING: Kernel needs upgrade [$ret]"
+		exit $WARNING
+	fi
 fi
 
 echo "OK: Running kernel matches on disk image: [$running_version]"