3 # Check if the running kernel has the same version string as the on-disk
6 # Copyright 2008 Peter Palfrader
7 # Copyright 2009 Stephen Gran
9 # Permission is hereby granted, free of charge, to any person obtaining
10 # a copy of this software and associated documentation files (the
11 # "Software"), to deal in the Software without restriction, including
12 # without limitation the rights to use, copy, modify, merge, publish,
13 # distribute, sublicense, and/or sell copies of the Software, and to
14 # permit persons to whom the Software is furnished to do so, subject to
15 # the following conditions:
17 # The above copyright notice and this permission notice shall be
18 # included in all copies or substantial portions of the Software.
20 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 $i = index(<>, "'"$needle"'");
44 print $i,"\n"' < "$file"
48 # This is wrong, but leaves room for when we have to care for machines running
49 # myfirstunix-image-0.1-dsa-arm
52 local kervers=$(uname -r)
56 # DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
57 # Debian uses versions of the form 2.6.29-2-amd64
58 if [ "${kervers//dsa}" != "$kervers" ]; then
59 metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
61 metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
64 # We're just going to give up if we can't find a matching metapackage
65 # I tried being strict once, and it just caused a lot of headaches. We'll see how
66 # being lax does for us
68 local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
69 local metaavailvers=$(echo "$output" | grep '^ Candidate:' | awk '{print $2}')
70 local metainstavers=$(echo "$output" | grep '^ Installed:' | awk '{print $2}')
72 if [ -z "$metaavailvers" ] || [ "$metaavailvers" = '(none)' ]; then
75 if [ -z "$metainstavers" ] || [ "$metainstavers" = '(none)' ]; then
80 for vers in $(apt-cache --no-all-versions depends ${prefix}-image-${metavers} | grep Depends | awk '{print $2}' | sort -u); do
81 if dpkg --compare-versions $vers gt $imagename; then
86 if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
90 if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
91 echo "$imagename" != "${prefix}-image-${kervers}"
95 local availvrs=$(apt-cache policy ${imagename} 2>/dev/null | grep '^ Candidate' | awk '{print $2}')
96 local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^ Installed:' | awk '{print $2}')
98 if [ "$availvrs" = "$kernelversion" ]; then
102 echo "$kernelversion != $availvrs"
108 local image GZHDR1 GZHDR2 off
112 GZHDR1="\x1f\x8b\x08\x00"
113 GZHDR2="\x1f\x8b\x08\x08"
115 off=`get_offset "$image" $GZHDR1`
116 [ "$?" != "0" ] && off="-1"
117 if [ "$off" -eq "-1" ]; then
118 off=`get_offset "$image" $GZHDR2`
119 [ "$?" != "0" ] && off="-1"
121 if [ "$off" -eq "0" ]; then
124 elif [ "$off" -ne "-1" ]; then
125 (dd ibs="$off" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | zcat 2>/dev/null
129 echo "ERROR: Unable to extract kernel image." 2>&1
135 "/boot/vmlinuz-`uname -r`"\
136 "/boot/vmlinux-`uname -r`"; do
138 if [ -e "$on_disk" ]; then
139 on_disk_version="`get_image "$on_disk" | strings | grep 'Linux version' | head -n1`"
140 [ -z "$on_disk_version" ] || break
141 on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
142 [ -z "$on_disk_version" ] || break
144 echo "UNKNOWN: Failed to get a version string from image $on_disk"
147 searched="$searched $on_disk"
150 if ! [ -e "$on_disk" ]; then
151 echo "WARNING: Did not find a kernel image (checked$searched) - I have no idea which kernel I am running"
156 running_version="`cat /proc/version`"
157 if [ -z "$running_version" ] ; then
158 echo "UNKNOWN: Failed to get a version string from running system"
162 if [ "$running_version" != "$on_disk_version" ]; then
163 echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
169 echo "WARNING: Kernel needs upgrade [$ret]"
173 echo "OK: Running kernel matches on disk image: [$running_version]"