Merge branch 'master' of /srv/db.debian.org/git/dsa-nagios

[mirror/dsa-nagios.git] / dsa-nagios-checks / checks / dsa-check-running-kernel

diff --git a/dsa-nagios-checks/checks/dsa-check-running-kernel b/dsa-nagios-checks/checks/dsa-check-running-kernel
index 757459b..0d50b76 100755 (executable)
--- a/dsa-nagios-checks/checks/dsa-check-running-kernel
+++ b/dsa-nagios-checks/checks/dsa-check-running-kernel
@@ -3,8 +3,9 @@
 # Check if the running kernel has the same version string as the on-disk
 # kernel image.
 
-# Copyright 2008 Peter Palfrader
+# Copyright 2008,2009 Peter Palfrader
 # Copyright 2009 Stephen Gran
+# Copyright 2010 Uli Martens
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -50,7 +51,6 @@ get_avail() {
        local prefix=linux
 
        local kervers=$(uname -r)
-       local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^  Installed:' | awk '{print $2}')
 
        local metavers=''
 
@@ -62,6 +62,11 @@ get_avail() {
                metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
        fi
 
+       # 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
@@ -77,24 +82,33 @@ get_avail() {
                return 2
        fi
 
-       local last=0
-       for vers in $(apt-cache --no-all-versions depends ${prefix}-image-${metavers} | grep Depends | awk '{print $2}' | sort -u); do
-               if dpkg --compare-versions $vers gt $last; then
-                       last=$vers
+       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 $vers gt $imagename; then
+                       imagename=$vers
                fi
        done
-       local imagename=$last
 
        if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
                return 2
        fi
 
-        if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
-               echo "$imagename" != "${prefix}-image-${kervers}"
+       if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
+               if dpkg --compare-versions "$imagename" lt "${prefix}-image-${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
@@ -104,14 +118,14 @@ get_avail() {
        return 1
 }
 
-
 get_image() {
-       local image GZHDR1 GZHDR2 off
+       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"
@@ -127,6 +141,13 @@ 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
 }