X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-running-kernel;h=ccdfd809d12501346b2131b79ef0e0f4d55d2b0d;hb=b1377ef7037a2ca597f830df3b5c993be560e842;hp=0d50b7650734f9c15d2318cb2f8a521cab26b6c3;hpb=30154ac2af96c282e8e4397aea0312ceeaf3f896;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 0d50b76..ccdfd80 100755 --- a/dsa-nagios-checks/checks/dsa-check-running-kernel +++ b/dsa-nagios-checks/checks/dsa-check-running-kernel @@ -3,9 +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 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 @@ -48,7 +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) @@ -56,7 +57,9 @@ get_avail() { # 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 [ "${kervers//dsa}" != "$kervers" ]; then + if [ "${kervers#3}" != "$kervers" ]; then + metavers=$(echo $kervers | sed -r -e 's/^3\.[0-9].[0-9]+-[A-Za-z0-9\.]+-(.*)/\1/') + elif [ "${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/') @@ -90,7 +93,7 @@ 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} | sed -n 's/^Depends: //p' | tr ',' '\n' | tr -d ' ' | grep ${prefix}-image | awk '{print $1}' | sort -u); do - if dpkg --compare-versions $vers gt $imagename; then + if dpkg --compare-versions "1.$vers" gt "1.$imagename"; then imagename=$vers fi done @@ -100,7 +103,7 @@ get_avail() { fi if [ "$imagename" != "${prefix}-image-${kervers}" ]; then - if dpkg --compare-versions "$imagename" lt "${prefix}-image-${kervers}"; then + if dpkg --compare-versions 1."$imagename" lt 1."${prefix}-image-${kervers}"; then return 2 fi echo "$imagename" != "${prefix}-image-${kervers}" @@ -118,53 +121,97 @@ get_avail() { return 1 } -get_image() { - local image GZHDR1 GZHDR2 LZHDR off +cat_vmlinux() { + local image header filter hdroff image="$1" + header="$2" + filter="$3" + hdroff="$4" + + off=`get_offset "$image" $header` + local ret="$?" + if [ "$ret" != 0 ]; then + # not found, exit + return 1 + fi - GZHDR1="\x1f\x8b\x08\x00" - GZHDR2="\x1f\x8b\x08\x08" - LZHDR="\x00\x00\x00\x02\xff" + (if [ "$off" != 0 ]; then + dd ibs="$((off+hdroff))" skip=1 count=0 + fi && + dd bs=512k) < "$image" 2>/dev/null | $filter 2>/dev/null + return 0 +} - off=`get_offset "$image" $GZHDR1` - [ "$?" != "0" ] && off="-1" - if [ "$off" -eq "-1" ]; then - off=`get_offset "$image" $GZHDR2` - [ "$?" != "0" ] && off="-1" - fi - if [ "$off" -eq "0" ]; then - zcat < "$image" - return - elif [ "$off" -ne "-1" ]; then - (dd ibs="$off" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | zcat 2>/dev/null - return - fi +get_image_linux() { + local image - off=`get_offset "$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 + image="$1" + + # gzip compressed image + if cat_vmlinux "$image" "\x1f\x8b\x08\x00" "zcat" 0; then return; fi + if cat_vmlinux "$image" "\x1f\x8b\x08\x08" "zcat" 0; then return; fi + # lzma compressed image + if cat_vmlinux "$image" "\x00\x00\x00\x02\xff" "xzcat" -1; then return; fi + if cat_vmlinux "$image" "\x00\x00\x00\x04\xff" "xzcat" -1; then return; fi + # xz compressed image + if cat_vmlinux "$image" "\xfd\x37\x7a\x58\x5a " "xzcat" 0; then 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 +} + +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 $on_disk" done @@ -174,22 +221,37 @@ if ! [ -e "$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]"