diff options
Diffstat (limited to 'hosts/wbq0-armhf-rb/usr/local/bin/dsa-check-running-kernel')
| -rwxr-xr-x | hosts/wbq0-armhf-rb/usr/local/bin/dsa-check-running-kernel | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/hosts/wbq0-armhf-rb/usr/local/bin/dsa-check-running-kernel b/hosts/wbq0-armhf-rb/usr/local/bin/dsa-check-running-kernel new file mode 100755 index 00000000..11574804 --- /dev/null +++ b/hosts/wbq0-armhf-rb/usr/local/bin/dsa-check-running-kernel @@ -0,0 +1,253 @@ +#!/bin/bash + +# Check if the running kernel has the same version string as the on-disk +# kernel image. + +# Copyright 2008,2009,2011 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 +# "Software"), to deal in the Software without restriction, including +# without limitation the rights to use, copy, modify, merge, publish, +# distribute, sublicense, and/or sell copies of the Software, and to +# permit persons to whom the Software is furnished to do so, subject to +# the following conditions: +# +# The above copyright notice and this permission notice shall be +# included in all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +OK=0; +WARNING=1; +CRITICAL=2; +UNKNOWN=3; + +get_offset() { + local file needle + + file="$1" + needle="$2" + perl -e ' + undef $/; + $i = index(<>, "'"$needle"'"); + if ($i < 0) { + exit 1; + }; + print $i,"\n"' < "$file" +} + +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 [ "${kervers#3}" != "$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 $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/') + fi + + # Attempt to track back to a metapackage failed. bail + if [ "$metavers" = "$kervers" ]; then + return 2 + fi + + # We're just going to give up if we can't find a matching metapackage + # I tried being strict once, and it just caused a lot of headaches. We'll see how + # being lax does for us + + local output=$(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 $2}') + + if [ -z "$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 + + if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then + return 2 + fi + + 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="$4" + + off=`get_offset "$image" $header` + if [ "$?" != 0 ]; then + # not found, exit + return 1 + fi + + (dd ibs="$((off+$hdroff))" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | $filter 2>/dev/null +} + +get_image_linux() { + local image + + 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`"\ + "/boot/kfreebsd-`uname -r`.gz"; do + + if [ -e "$on_disk" ]; then + if [ -z "$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 $on_disk" +done + +if ! [ -e "$on_disk" ]; then + echo "WARNING: Did not find a kernel image (checked$searched) - I have no idea which kernel I am running" + 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 $UNKNOWN + fi + + if [ "$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 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 |