X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-running-kernel;h=aa6e35bdd0a0514c8bd1ceb6cb6464a10c613067;hb=86052c3ac0fa5cd3efaf39526fe69d6c4a2e1dbb;hp=818288f273d3aa1e586e688bf6a26342ce954e28;hpb=42e99da9d896a33803e763c746e9a103183b6b34;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 818288f..aa6e35b 100755
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -3,7 +3,10 @@
 # Check if the running kernel has the same version string as the on-disk
 # kernel image.
 
-# Copyright 2008 Peter Palfrader
+# Copyright 2008,2009,2011,2012,2013,2014 Peter Palfrader
+# Copyright 2009 Stephen Gran
+# Copyright 2010,2012,2013 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
@@ -34,54 +37,177 @@ get_offset() {
 
 	file="$1"
 	needle="$2"
+
 	perl -e '
 		undef $/;
-		$i = index(<>, "'"$needle"'");
-		if ($i < 0) {
-			exit 1;
-		};
-		print $i,"\n"' < "$file"
+		$i = 0; $k=<>;
+		while (($i = index($k, "'"$needle"'", $i)) >= 0) {
+			print $i++,"\n";
+		}; ' < "$file"
 }
 
-get_image() {
-	local image GZHDR1 GZHDR2 off
+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="$1"; shift
+
+	local kervers=$(uname -r)
+
+	local metavers=''
+
+	# DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
+	# Debian uses versions of the form 2.6.29-2-amd64
+	if [ "${kervers#2}" != "$kervers" ]; then
+		if [ "${kervers//dsa}" != "$kervers" ]; then
+			metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
+		else
+			metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
+		fi
+	else
+		metavers=$(echo $kervers | sed -r -e 's/^[0-9]+\.[0-9]+(\.[0-9])?+-[A-Za-z0-9\.]+-(.*)/\2/')
+	fi
 
-	image="$1"
+	# Attempt to track back to a metapackage failed.  bail
+	if [ "$metavers" = "$kervers" ]; then
+		return 2
+	fi
+
+	# We're just going to give up if we can't find a matching metapackage
+	# I tried being strict once, and it just caused a lot of headaches.  We'll see how
+	# being lax does for us
+
+	local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
+	local metaavailvers=$(echo "$output" | grep '^  Candidate:' | awk '{print $2}')
+	local metainstavers=$(echo "$output" | grep '^  Installed:' | awk '{print $2}')
 
-	GZHDR1="\x1f\x8b\x08\x00"
-	GZHDR2="\x1f\x8b\x08\x08"
+	if [ -z "$metaavailvers" ] || [ "$metaavailvers" = '(none)' ]; then
+		return 2
+	fi
+	if [ -z "$metainstavers" ] || [ "$metainstavers" = '(none)' ]; then
+		return 2
+	fi
+
+	if [ "$metaavailvers" != "$metainstavers" ] ; then
+		echo "${prefix}-image-${metavers} $metaavailvers available but $metainstavers installed"
+		return 1
+	fi
+
+	local imagename=0
+	# --no-all-versions show shows only the candidate
+	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 $1}' | sort -u); do
+		if dpkg --compare-versions "1.$vers" gt "1.$imagename"; then
+			imagename=$vers
+		fi
+	done
 
-	off=`get_offset "$image" $GZHDR1`
-	[ "$?" != "0" ] && off="-1"
-	if [ "$off" -eq "-1" ]; then
-		off=`get_offset "$image" $GZHDR2`
-		[ "$?" != "0" ] && off="-1"
+	if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
+		return 2
 	fi
-	if [ "$off" -eq "0" ]; then
-		zcat < "$image"
-		return
-	elif [ "$off" -ne "-1" ]; then
-		(dd ibs="$off" skip=1 count=0 && dd bs=512k) < "$image"  2>/dev/null | zcat 2>/dev/null
-		return
+
+	if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
+		if dpkg --compare-versions 1."$imagename" lt 1."${prefix}-image-${kervers}"; then
+			return 2
+		fi
+		echo "$imagename" != "${prefix}-image-${kervers}"
+		return 1
 	fi
 
+	local availvrs=$(apt-cache policy ${imagename} 2>/dev/null | grep '^  Candidate' | awk '{print $2}')
+	local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^  Installed:' | awk '{print $2}')
+
+	if [ "$availvrs" = "$kernelversion" ]; then
+		return 0
+	fi
+
+	echo "$kernelversion != $availvrs"
+	return 1
+}
+
+cat_vmlinux() {
+	local image header filter hdroff
+
+	image="$1"
+	header="$2"
+	filter="$3"
+	hdroff="$4"
+
+	get_offset "$image" $header | head -n 5 | while read off; do
+		(if [ "$off" != 0 ]; then
+		   dd ibs="$((off+hdroff))" skip=1 count=0
+		 fi &&
+		 dd bs=512k) < "$image"  2>/dev/null | $filter 2>/dev/null
+	done
+}
+
+get_image_linux() {
+	local image
+
+	image="$1"
+
+	# gzip compressed image
+	cat_vmlinux "$image" "\x1f\x8b\x08\x00"      "zcat"   0
+	cat_vmlinux "$image" "\x1f\x8b\x08\x08"      "zcat"   0
+	# lzma compressed image
+	cat_vmlinux "$image" "\x00\x00\x00\x02\xff"  "xzcat" -1
+	cat_vmlinux "$image" "\x00\x00\x00\x04\xff"  "xzcat" -1
+	# xz compressed image
+	cat_vmlinux "$image" "\xfd\x37\x7a\x58\x5a " "xzcat"  0
+
 	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" | $STRINGS | grep -F -q "$q"; then
+		echo "OK"
+	else
+		echo "not OK"
+	fi
+}
+
+STRINGS="";
+if [ -x "$(which strings)" ]; then
+	STRINGS="$(which strings)"
+elif [ -x "$(which busybox)" -a "$( echo foobar | $(which busybox) strings 2>/dev/null)" = "foobar" ]; then
+	STRINGS="$(which busybox) strings"
+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 $UNKNOWN
+		if [ -z "$STRINGS" ]; then
+			echo "UNKNOWN: 'strings' command missing, perhaps install binutils or busybox?"
+			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 $on_disk"
 done
@@ -91,17 +217,38 @@ if ! [ -e "$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 $WARNING
+	ret="$(get_avail linux)"
+	if [ $? = 1 ]; then
+		echo "WARNING: Kernel needs upgrade [$ret]"
+		exit $WARNING
+	fi
 else
-	echo "OK: Running kernel matches on disk image: [$running_version]"
-	exit $OK
+	image_current=$(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 linux)"
+	if [ $? = 1 ]; then
+		echo "WARNING: Kernel needs upgrade [$ret]"
+		exit $WARNING
+	fi
 fi
+
+echo "OK: Running kernel matches on disk image: [$running_version]"
+exit $OK