1 #! /bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3 # Script to apply kernel patches.
4 # usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
5 # The source directory defaults to /usr/src/linux, and the patch
6 # directory defaults to the current directory.
7 # e.g.
8 # scripts/patch-kernel . ..
9 # Update the kernel tree in the current directory using patches in the
10 # directory above to the latest Linus kernel
11 # scripts/patch-kernel . .. -ac
12 # Get the latest Linux kernel and patch it with the latest ac patch
13 # scripts/patch-kernel . .. 2.4.9
14 # Gets standard kernel 2.4.9
15 # scripts/patch-kernel . .. 2.4.9 -ac
16 # Gets 2.4.9 with latest ac patches
17 # scripts/patch-kernel . .. 2.4.9 -ac11
18 # Gets 2.4.9 with ac patch ac11
19 # Note: It uses the patches relative to the Linus kernels, not the
20 # ac to ac relative patches
21 #
22 # It determines the current kernel version from the top-level Makefile.
23 # It then looks for patches for the next sublevel in the patch directory.
24 # This is applied using "patch -p1 -s" from within the kernel directory.
25 # A check is then made for "*.rej" files to see if the patch was
26 # successful. If it is, then all of the "*.orig" files are removed.
27 #
28 # Nick Holloway <Nick.Holloway@alfie.demon.co.uk>, 2nd January 1995.
29 #
30 # Added support for handling multiple types of compression. What includes
31 # gzip, bzip, bzip2, zip, compress, and plaintext.
32 #
33 # Adam Sulmicki <adam@cfar.umd.edu>, 1st January 1997.
34 #
35 # Added ability to stop at a given version number
36 # Put the full version number (i.e. 2.3.31) as the last parameter
37 # Dave Gilbert <linux@treblig.org>, 11th December 1999.
38
39 # Fixed previous patch so that if we are already at the correct version
40 # not to patch up.
41 #
42 # Added -ac option, use -ac or -ac9 (say) to stop at a particular version
43 # Dave Gilbert <linux@treblig.org>, 29th September 2001.
44 #
45 # Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.);
46 # update usage message;
47 # fix some whitespace damage;
48 # be smarter about stopping when current version is larger than requested;
49 # Randy Dunlap <rdunlap@xenotime.net>, 2004-AUG-18.
50 #
51 # Add better support for (non-incremental) 2.6.x.y patches;
52 # If an ending version number if not specified, the script automatically
53 # increments the SUBLEVEL (x in 2.6.x.y) until no more patch files are found;
54 # however, EXTRAVERSION (y in 2.6.x.y) is never automatically incremented
55 # but must be specified fully.
56 #
57 # patch-kernel does not normally support reverse patching, but does so when
58 # applying EXTRAVERSION (x.y) patches, so that moving from 2.6.11.y to 2.6.11.z
59 # is easy and handled by the script (reverse 2.6.11.y and apply 2.6.11.z).
60 # Randy Dunlap <rdunlap@xenotime.net>, 2005-APR-08.
61
62 PNAME=patch-kernel
63
64 # Set directories from arguments, or use defaults.
65 sourcedir=${1-/usr/src/linux}
66 patchdir=${2-.}
67 stopvers=${3-default}
68
69 if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
70 cat << USAGE
71 usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
72 source directory defaults to /usr/src/linux,
73 patch directory defaults to the current directory,
74 stopversion defaults to <all in patchdir>.
75 USAGE
76 exit 1
77 fi
78
79 # See if we have any -ac options
80 for PARM in $*
81 do
82 case $PARM in
83 -ac*)
84 gotac=$PARM;
85
86 esac;
87 done
88
89 # ---------------------------------------------------------------------------
90 # arg1 is filename
91 noFile () {
92 echo "cannot find patch file: ${patch}"
93 exit 1
94 }
95
96 # ---------------------------------------------------------------------------
97 backwards () {
98 echo "$PNAME does not support reverse patching"
99 exit 1
100 }
101
102 # ---------------------------------------------------------------------------
103 # Find a file, first parameter is basename of file
104 # it tries many compression mechanisms and sets variables to say how to get it
105 findFile () {
106 filebase=$1;
107
108 if [ -r ${filebase}.gz ]; then
109 ext=".gz"
110 name="gzip"
111 uncomp="gunzip -dc"
112 elif [ -r ${filebase}.bz ]; then
113 ext=".bz"
114 name="bzip"
115 uncomp="bunzip -dc"
116 elif [ -r ${filebase}.bz2 ]; then
117 ext=".bz2"
118 name="bzip2"
119 uncomp="bunzip2 -dc"
120 elif [ -r ${filebase}.xz ]; then
121 ext=".xz"
122 name="xz"
123 uncomp="xz -dc"
124 elif [ -r ${filebase}.zip ]; then
125 ext=".zip"
126 name="zip"
127 uncomp="unzip -d"
128 elif [ -r ${filebase}.Z ]; then
129 ext=".Z"
130 name="uncompress"
131 uncomp="uncompress -c"
132 elif [ -r ${filebase} ]; then
133 ext=""
134 name="plaintext"
135 uncomp="cat"
136 else
137 return 1;
138 fi
139
140 return 0;
141 }
142
143 # ---------------------------------------------------------------------------
144 # Apply a patch and check it goes in cleanly
145 # First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
146
147 applyPatch () {
148 echo -n "Applying $1 (${name})... "
149 if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
150 then
151 echo "done."
152 else
153 echo "failed. Clean up yourself."
154 return 1;
155 fi
156 if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
157 then
158 echo "Aborting. Reject files found."
159 return 1;
160 fi
161 # Remove backup files
162 find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
163
164 return 0;
165 }
166
167 # ---------------------------------------------------------------------------
168 # arg1 is patch filename
169 reversePatch () {
170 echo -n "Reversing $1 (${name}) ... "
171 if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir
172 then
173 echo "done."
174 else
175 echo "failed. Clean it up."
176 exit 1
177 fi
178 if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
179 then
180 echo "Aborting. Reject files found."
181 return 1
182 fi
183 # Remove backup files
184 find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
185
186 return 0
187 }
188
189 # set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
190 # force $TMPFILEs below to be in local directory: a slash character prevents
191 # the dot command from using the search path.
192 TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
193 grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
194 tr -d [:blank:] < $TMPFILE > $TMPFILE.1
195 . $TMPFILE.1
196 rm -f $TMPFILE*
197 if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
198 then
199 echo "unable to determine current kernel version" >&2
200 exit 1
201 fi
202
203 NAME=`grep ^NAME $sourcedir/Makefile`
204 NAME=${NAME##*=}
205
206 echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
207
208 # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
209 EXTRAVER=
210 if [ x$EXTRAVERSION != "x" ]
211 then
212 EXTRAVER=${EXTRAVERSION#.}
213 EXTRAVER=${EXTRAVER%%[[:punct:]]*}
214 #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
215 fi
216
217 #echo "stopvers=$stopvers"
218 if [ $stopvers != "default" ]; then
219 STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
220 STOPEXTRA=`echo $stopvers | cut -d. -f4`
221 STOPFULLVERSION=${stopvers%%.$STOPEXTRA}
222 #echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
223 else
224 STOPSUBLEVEL=9999
225 STOPEXTRA=9999
226 fi
227
228 # This all assumes a 2.6.x[.y] kernel tree.
229 # Don't allow backwards/reverse patching.
230 if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
231 backwards
232 fi
233
234 if [ x$EXTRAVER != "x" ]; then
235 CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
236 else
237 CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
238 fi
239
240 if [ x$EXTRAVER != "x" ]; then
241 echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"
242 patch="patch-${CURRENTFULLVERSION}"
243 findFile $patchdir/${patch} || noFile ${patch}
244 reversePatch ${patch} || exit 1
245 fi
246
247 # now current is 2.6.x, with no EXTRA applied,
248 # so update to target SUBLEVEL (2.6.SUBLEVEL)
249 # and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.
250 # If not ending sublevel is specified, it is incremented until
251 # no further sublevels are found.
252
253 if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then
254 while : # incrementing SUBLEVEL (s in v.p.s)
255 do
256 CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
257 EXTRAVER=
258 if [ x$STOPFULLVERSION = x$CURRENTFULLVERSION ]; then
259 echo "Stopping at $CURRENTFULLVERSION base as requested."
260 break
261 fi
262
263 SUBLEVEL=$(($SUBLEVEL + 1))
264 FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
265 #echo "#___ trying $FULLVERSION ___"
266
267 if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
268 echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
269 exit 1
270 fi
271
272 patch=patch-$FULLVERSION
273 # See if the file exists and find extension
274 findFile $patchdir/${patch} || noFile ${patch}
275
276 # Apply the patch and check all is OK
277 applyPatch $patch || break
278 done
279 #echo "#___sublevel all done"
280 fi
281
282 # There is no incremental searching for extraversion...
283 if [ "$STOPEXTRA" != "" ]; then
284 while : # just to allow break
285 do
286 # apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)
287 FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"
288 #echo "#... trying $FULLVERSION ..."
289 patch=patch-$FULLVERSION
290
291 # See if the file exists and find extension
292 findFile $patchdir/${patch} || noFile ${patch}
293
294 # Apply the patch and check all is OK
295 applyPatch $patch || break
296 #echo "#___extraver all done"
297 break
298 done
299 fi
300
301 if [ x$gotac != x ]; then
302 # Out great user wants the -ac patches
303 # They could have done -ac (get latest) or -acxx where xx=version they want
304 if [ $gotac = "-ac" ]; then
305 # They want the latest version
306 HIGHESTPATCH=0
307 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
308 do
309 ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
310 # Check it is actually a recognised patch type
311 findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
312
313 if [ $ACVALUE -gt $HIGHESTPATCH ]; then
314 HIGHESTPATCH=$ACVALUE
315 fi
316 done
317
318 if [ $HIGHESTPATCH -ne 0 ]; then
319 findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
320 applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
321 else
322 echo "No -ac patches found"
323 fi
324 else
325 # They want an exact version
326 findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
327 echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION. Hohum."
328 exit 1
329 }
330 applyPatch patch-${CURRENTFULLVERSION}${gotac}
331 fi
332 fi
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