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=$(uname -r)
53 local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null | grep '^ Installed:' | awk '{print $2}')
57 # DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
58 # Debian uses versions of the form 2.6.29-2-amd64
59 if [ "${kervers//dsa}" != "$kervers" ]; then
60 metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
62 metavers=$(echo $kervers | sed -r -e 's/^2\.(4|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
65 # We're just going to give up if we can't find a matching metapackage
66 # I tried being strict once, and it just caused a lot of headaches. We'll see how
67 # being lax does for us
69 local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
70 local metaavailvers=$(echo "$output" | grep '^ Candidate:' | awk '{print $2}')
71 local metainstavers=$(echo "$output" | grep '^ Installed:' | awk '{print $2}')
73 if [ -z "$metaavailvers" ] || [ "$metaavailvers" = '(none)' ]; then
76 if [ -z "$metainstavers" ] || [ "$metainstavers" = '(none)' ]; then
81 for vers in $(apt-cache --no-all-versions depends ${prefix}-image-${metavers} | grep Depends | awk '{print $2}' | sort -u); do
82 if dpkg --compare-versions $vers gt $last; then
88 if [ -z "$imagename" ] || [ "$imagename" = 0 ]; then
92 if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
93 echo "$imagename" != "${prefix}-image-${kervers}"
97 local availvrs=$(apt-cache policy ${imagename} 2>/dev/null | grep '^ Candidate' | awk '{print $2}')
99 if [ "$availvrs" = "$kernelversion" ]; then
103 echo "$kernelversion != $availvrs"
109 local image GZHDR1 GZHDR2 off
113 GZHDR1="\x1f\x8b\x08\x00"
114 GZHDR2="\x1f\x8b\x08\x08"
116 off=`get_offset "$image" $GZHDR1`
117 [ "$?" != "0" ] && off="-1"
118 if [ "$off" -eq "-1" ]; then
119 off=`get_offset "$image" $GZHDR2`
120 [ "$?" != "0" ] && off="-1"
122 if [ "$off" -eq "0" ]; then
125 elif [ "$off" -ne "-1" ]; then
126 (dd ibs="$off" skip=1 count=0 && dd bs=512k) < "$image" 2>/dev/null | zcat 2>/dev/null
130 echo "ERROR: Unable to extract kernel image." 2>&1
136 "/boot/vmlinuz-`uname -r`"\
137 "/boot/vmlinux-`uname -r`"; do
139 if [ -e "$on_disk" ]; then
140 on_disk_version="`get_image "$on_disk" | strings | grep 'Linux version' | head -n1`"
141 [ -z "$on_disk_version" ] || break
142 on_disk_version="`cat "$on_disk" | strings | grep 'Linux version' | head -n1`"
143 [ -z "$on_disk_version" ] || break
145 echo "UNKNOWN: Failed to get a version string from image $on_disk"
148 searched="$searched $on_disk"
151 if ! [ -e "$on_disk" ]; then
152 echo "WARNING: Did not find a kernel image (checked$searched) - I have no idea which kernel I am running"
157 running_version="`cat /proc/version`"
158 if [ -z "$running_version" ] ; then
159 echo "UNKNOWN: Failed to get a version string from running system"
163 if [ "$running_version" != "$on_disk_version" ]; then
164 echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
170 echo "WARNING: Kernel needs upgrade [$ret]"
174 echo "OK: Running kernel matches on disk image: [$running_version]"