gist:70c89069b6ab48c78809c897eb01a9fd

check_running_kernel_mixed_arch · 7.7 KiB · Text Raw

#!/bin/bash # Check if the running kernel has the same version string as the on-disk # kernel image. # Copyright 2008,2009,2011,2012,2013,2014 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" pos="$3" perl -e ' undef $/; $i = index(<>, "'"$needle"'", '"$pos"'); if ($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="$4" nextoff=0 while : ; do off=`get_offset "$image" $header $nextoff` local ret="$?" if [ "$ret" != 0 ]; then # not found, exit return 1 fi (if [ "$off" != 0 ]; then dd ibs="$((off+hdroff))" skip=1 count=0 fi && dd bs=512k) < "$image" 2>/dev/null | $filter 2>/dev/null nextoff=$((off + 1)) done return 0 } get_image_linux() { local image image="$1" # gzip compressed image cat_vmlinux "$image" "\x1f\x8b\x08\x00" "zcat" 0 cat_vmlinux "$image" "\x1f\x8b\x08\x08" "zcat" 0 # lzma compressed image cat_vmlinux "$image" "\x00\x00\x00\x02\xff" "xzcat" -1 cat_vmlinux "$image" "\x00\x00\x00\x04\xff" "xzcat" -1 # xz compressed image cat_vmlinux "$image" "\xfd\x37\x7a\x58\x5a " "xzcat" 0 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="$(uname -v| sed -e 's/^#[0-9]*/&:/' -e 's/\+/\\+/g')" local q='@$#$FreeBSD '"$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 on_disk_version="$(echo $on_disk_version | sed 's/#.*//')" running_version="`cat /proc/version | sed 's/#.*//'`" if [ -z "$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

1	#!/bin/bash
2
3	# Check if the running kernel has the same version string as the on-disk
4	# kernel image.
5
6	# Copyright 2008,2009,2011,2012,2013,2014 Peter Palfrader
7	# Copyright 2009 Stephen Gran
8	# Copyright 2010,2012,2013 Uli Martens
9	# Copyright 2011 Alexander Reichle-Schmehl
10	#
11	# Permission is hereby granted, free of charge, to any person obtaining
12	# a copy of this software and associated documentation files (the
13	# "Software"), to deal in the Software without restriction, including
14	# without limitation the rights to use, copy, modify, merge, publish,
15	# distribute, sublicense, and/or sell copies of the Software, and to
16	# permit persons to whom the Software is furnished to do so, subject to
17	# the following conditions:
18	#
19	# The above copyright notice and this permission notice shall be
20	# included in all copies or substantial portions of the Software.
21	#
22	# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23	# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24	# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25	# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26	# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27	# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28	# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29
30	OK=0;
31	WARNING=1;
32	CRITICAL=2;
33	UNKNOWN=3;
34
35	get_offset() {
36	local file needle
37
38	file="$1"
39	needle="$2"
40	pos="$3"
41
42	perl -e '
43	undef $/;
44	$i = index(<>, "'"$needle"'", '"$pos"');
45	if ($i < 0) {
46	exit 1;
47	};
48	print $i,"\n"' < "$file"
49	}
50
51	get_avail() {
52	# This is wrong, but leaves room for when we have to care for machines running
53	# myfirstunix-image-0.1-dsa-arm
54	local prefix="$1"; shift
55
56	local kervers=$(uname -r)
57
58	local metavers=''
59
60	# DSA uses kernel versions of the form 2.6.29.3-dsa-dl380-oldxeon, where
61	# Debian uses versions of the form 2.6.29-2-amd64
62	if [ "${kervers#3}" != "$kervers" ]; then
63	metavers=$(echo $kervers \| sed -r -e 's/^3\.[0-9].[0-9]+-[A-Za-z0-9\.]+-(.*)/\1/')
64	elif [ "${kervers//dsa}" != "$kervers" ]; then
65	metavers=$(echo $kervers \| sed -r -e 's/^2\.(4\|6)\.[0-9]+([\.0-9]+?)-(.*)/2.\1-\3/')
66	else
67	metavers=$(echo $kervers \| sed -r -e 's/^2\.(4\|6)\.[0-9]+-[A-Za-z0-9\.]+-(.*)/2.\1-\2/')
68	fi
69
70	# Attempt to track back to a metapackage failed. bail
71	if [ "$metavers" = "$kervers" ]; then
72	return 2
73	fi
74
75	# We're just going to give up if we can't find a matching metapackage
76	# I tried being strict once, and it just caused a lot of headaches. We'll see how
77	# being lax does for us
78
79	local output=$(apt-cache policy ${prefix}-image-${metavers} 2>/dev/null)
80	local metaavailvers=$(echo "$output" \| grep '^ Candidate:' \| awk '{print $2}')
81	local metainstavers=$(echo "$output" \| grep '^ Installed:' \| awk '{print $2}')
82
83	if [ -z "$metaavailvers" ] \|\| [ "$metaavailvers" = '(none)' ]; then
84	return 2
85	fi
86	if [ -z "$metainstavers" ] \|\| [ "$metainstavers" = '(none)' ]; then
87	return 2
88	fi
89
90	if [ "$metaavailvers" != "$metainstavers" ] ; then
91	echo "${prefix}-image-${metavers} $metaavailvers available but $metainstavers installed"
92	return 1
93	fi
94
95	local imagename=0
96	# --no-all-versions show shows only the candidate
97	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 $1}' \| sort -u); do
98	if dpkg --compare-versions "1.$vers" gt "1.$imagename"; then
99	imagename=$vers
100	fi
101	done
102
103	if [ -z "$imagename" ] \|\| [ "$imagename" = 0 ]; then
104	return 2
105	fi
106
107	if [ "$imagename" != "${prefix}-image-${kervers}" ]; then
108	if dpkg --compare-versions 1."$imagename" lt 1."${prefix}-image-${kervers}"; then
109	return 2
110	fi
111	echo "$imagename" != "${prefix}-image-${kervers}"
112	return 1
113	fi
114
115	local availvrs=$(apt-cache policy ${imagename} 2>/dev/null \| grep '^ Candidate' \| awk '{print $2}')
116	local kernelversion=$(apt-cache policy ${prefix}-image-${kervers} 2>/dev/null \| grep '^ Installed:' \| awk '{print $2}')
117
118	if [ "$availvrs" = "$kernelversion" ]; then
119	return 0
120	fi
121
122	echo "$kernelversion != $availvrs"
123	return 1
124	}
125
126	cat_vmlinux() {
127	local image header filter hdroff
128
129	image="$1"
130	header="$2"
131	filter="$3"
132	hdroff="$4"
133	nextoff=0
134
135	while : ; do
136	off=`get_offset "$image" $header $nextoff`
137	local ret="$?"
138	if [ "$ret" != 0 ]; then
139	# not found, exit
140	return 1
141	fi
142
143	(if [ "$off" != 0 ]; then
144	dd ibs="$((off+hdroff))" skip=1 count=0
145	fi &&
146	dd bs=512k) < "$image" 2>/dev/null \| $filter 2>/dev/null
147	nextoff=$((off + 1))
148	done
149	return 0
150	}
151
152	get_image_linux() {
153	local image
154
155	image="$1"
156
157	# gzip compressed image
158	cat_vmlinux "$image" "\x1f\x8b\x08\x00" "zcat" 0
159	cat_vmlinux "$image" "\x1f\x8b\x08\x08" "zcat" 0
160	# lzma compressed image
161	cat_vmlinux "$image" "\x00\x00\x00\x02\xff" "xzcat" -1
162	cat_vmlinux "$image" "\x00\x00\x00\x04\xff" "xzcat" -1
163	# xz compressed image
164	cat_vmlinux "$image" "\xfd\x37\x7a\x58\x5a " "xzcat" 0
165
166	echo "ERROR: Unable to extract kernel image." 2>&1
167	exit 1
168	}
169
170
171	freebsd_check_running_version() {
172	local imagefile="$1"; shift
173
174	local r="$(uname -r)"
175	local v="$(uname -v\| sed -e 's/^#[0-9]*/&:/' -e 's/\+/\\+/g')"
176
177	local q='@$#$FreeBSD '"$r $v"
178
179	if zcat "$imagefile" \| $STRINGS \| egrep -q "$q"; then
180	echo "OK"
181	else
182	echo "not OK"
183	fi
184	}
185
186	STRINGS="";
187	if [ -x "$(which strings)" ]; then
188	STRINGS="$(which strings)"
189	elif [ -x "$(which busybox)" -a "$( echo foobar \| $(which busybox) strings 2>/dev/null)" = "foobar" ]; then
190	STRINGS="$(which busybox) strings"
191	fi
192
193	searched=""
194	for on_disk in \
195	"/boot/vmlinuz-`uname -r`"\
196	"/boot/vmlinux-`uname -r`"\
197	"/boot/kfreebsd-`uname -r`.gz"; do
198
199	if [ -e "$on_disk" ]; then
200	if [ -z "$STRINGS" ]; then
201	echo "UNKNOWN: 'strings' command missing, perhaps install binutils or busybox?"
202	exit $UNKNOWN
203	fi
204	if [ "${on_disk/vmlinu}" != "$on_disk" ]; then
205	on_disk_version="`get_image_linux "$on_disk" \| $STRINGS \| grep 'Linux version' \| head -n1`"
206	if [ -x /usr/bin/lsb_release ] ; then
207	vendor=$(lsb_release -i -s)
208	if [ -n "$vendor" ] && [ "xDebian" != "x$vendor" ] ; then
209	on_disk_version=$( echo $on_disk_version\|sed -e "s/ ($vendor [[:alnum:]\.-]\+ [[:alnum:]\.]\+)//")
210	fi
211	fi
212	[ -z "$on_disk_version" ] \|\| break
213	on_disk_version="`cat "$on_disk" \| $STRINGS \| grep 'Linux version' \| head -n1`"
214	[ -z "$on_disk_version" ] \|\| break
215
216	echo "UNKNOWN: Failed to get a version string from image $on_disk"
217	exit $UNKNOWN
218	else
219	on_disk_version="$(zcat $on_disk \| $STRINGS \| grep Debian \| head -n 1 \| sed -e 's/Debian [[:alnum:]]\+ ($.*$)/\1/')"
220	fi
221	fi
222	searched="$searched $on_disk"
223	done
224
225	if ! [ -e "$on_disk" ]; then
226	echo "WARNING: Did not find a kernel image (checked$searched) - I have no idea which kernel I am running"
227	exit $WARNING
228	fi
229
230	if [ "$(uname -s)" = "Linux" ]; then
231	on_disk_version="$(echo $on_disk_version \| sed 's/#.*//')"
232	running_version="`cat /proc/version \| sed 's/#.*//'`"
233	if [ -z "$running_version" ] ; then
234	echo "UNKNOWN: Failed to get a version string from running system"
235	exit $UNKNOWN
236	fi
237
238	if [ "$running_version" != "$on_disk_version" ]; then
239	echo "WARNING: Running kernel does not match on-disk kernel image: [$running_version != $on_disk_version]"
240	exit $WARNING
241	fi
242
243	ret="$(get_avail linux)"
244	if [ $? = 1 ]; then
245	echo "WARNING: Kernel needs upgrade [$ret]"
246	exit $WARNING
247	fi
248	else
249	image_current=$(freebsd_check_running_version $on_disk)
250	running_version="`uname -s` `uname -r` `uname -v`"
251	if [ "$image_current" != "OK" ]; then
252	approx_time="$(date -d "@`stat -c '%Y' "$on_disk"`" +"%Y-%m-%d %H:%M:%S")"
253	echo "WARNING: Currently running kernel ($running_version) does not match on disk image (~ $approx_time)"
254	exit $WARNING;
255	fi
256
257	ret="$(get_avail linux)"
258	if [ $? = 1 ]; then
259	echo "WARNING: Kernel needs upgrade [$ret]"
260	exit $WARNING
261	fi
262	fi
263
264	echo "OK: Running kernel matches on disk image: [$running_version]"
265	exit $OK