Root/scripts/patch-kernel

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
1#! /bin/sh
2# Script to apply kernel patches.
3# usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
4# The source directory defaults to /usr/src/linux, and the patch
5# directory defaults to the current directory.
6# e.g.
7# scripts/patch-kernel . ..
8# Update the kernel tree in the current directory using patches in the
9# directory above to the latest Linus kernel
10# scripts/patch-kernel . .. -ac
11# Get the latest Linux kernel and patch it with the latest ac patch
12# scripts/patch-kernel . .. 2.4.9
13# Gets standard kernel 2.4.9
14# scripts/patch-kernel . .. 2.4.9 -ac
15# Gets 2.4.9 with latest ac patches
16# scripts/patch-kernel . .. 2.4.9 -ac11
17# Gets 2.4.9 with ac patch ac11
18# Note: It uses the patches relative to the Linus kernels, not the
19# ac to ac relative patches
20#
21# It determines the current kernel version from the top-level Makefile.
22# It then looks for patches for the next sublevel in the patch directory.
23# This is applied using "patch -p1 -s" from within the kernel directory.
24# A check is then made for "*.rej" files to see if the patch was
25# successful. If it is, then all of the "*.orig" files are removed.
26#
27# Nick Holloway <Nick.Holloway@alfie.demon.co.uk>, 2nd January 1995.
28#
29# Added support for handling multiple types of compression. What includes
30# gzip, bzip, bzip2, zip, compress, and plaintext.
31#
32# Adam Sulmicki <adam@cfar.umd.edu>, 1st January 1997.
33#
34# Added ability to stop at a given version number
35# Put the full version number (i.e. 2.3.31) as the last parameter
36# Dave Gilbert <linux@treblig.org>, 11th December 1999.
37
38# Fixed previous patch so that if we are already at the correct version
39# not to patch up.
40#
41# Added -ac option, use -ac or -ac9 (say) to stop at a particular version
42# Dave Gilbert <linux@treblig.org>, 29th September 2001.
43#
44# Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.);
45# update usage message;
46# fix some whitespace damage;
47# be smarter about stopping when current version is larger than requested;
48# Randy Dunlap <rdunlap@xenotime.net>, 2004-AUG-18.
49#
50# Add better support for (non-incremental) 2.6.x.y patches;
51# If an ending version number if not specified, the script automatically
52# increments the SUBLEVEL (x in 2.6.x.y) until no more patch files are found;
53# however, EXTRAVERSION (y in 2.6.x.y) is never automatically incremented
54# but must be specified fully.
55#
56# patch-kernel does not normally support reverse patching, but does so when
57# applying EXTRAVERSION (x.y) patches, so that moving from 2.6.11.y to 2.6.11.z
58# is easy and handled by the script (reverse 2.6.11.y and apply 2.6.11.z).
59# Randy Dunlap <rdunlap@xenotime.net>, 2005-APR-08.
60
61PNAME=patch-kernel
62
63# Set directories from arguments, or use defaults.
64sourcedir=${1-/usr/src/linux}
65patchdir=${2-.}
66stopvers=${3-default}
67
68if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
69cat << USAGE
70usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
71  source directory defaults to /usr/src/linux,
72  patch directory defaults to the current directory,
73  stopversion defaults to <all in patchdir>.
74USAGE
75exit 1
76fi
77
78# See if we have any -ac options
79for PARM in $*
80do
81  case $PARM in
82      -ac*)
83          gotac=$PARM;
84
85    esac;
86done
87
88# ---------------------------------------------------------------------------
89# arg1 is filename
90noFile () {
91    echo "cannot find patch file: ${patch}"
92    exit 1
93}
94
95# ---------------------------------------------------------------------------
96backwards () {
97    echo "$PNAME does not support reverse patching"
98    exit 1
99}
100
101# ---------------------------------------------------------------------------
102# Find a file, first parameter is basename of file
103# it tries many compression mechanisms and sets variables to say how to get it
104findFile () {
105  filebase=$1;
106
107  if [ -r ${filebase}.gz ]; then
108        ext=".gz"
109        name="gzip"
110        uncomp="gunzip -dc"
111  elif [ -r ${filebase}.bz ]; then
112        ext=".bz"
113        name="bzip"
114        uncomp="bunzip -dc"
115  elif [ -r ${filebase}.bz2 ]; then
116        ext=".bz2"
117        name="bzip2"
118        uncomp="bunzip2 -dc"
119  elif [ -r ${filebase}.xz ]; then
120                ext=".xz"
121                name="xz"
122                uncomp="xz -dc"
123  elif [ -r ${filebase}.zip ]; then
124        ext=".zip"
125        name="zip"
126        uncomp="unzip -d"
127  elif [ -r ${filebase}.Z ]; then
128        ext=".Z"
129        name="uncompress"
130        uncomp="uncompress -c"
131  elif [ -r ${filebase} ]; then
132        ext=""
133        name="plaintext"
134        uncomp="cat"
135  else
136    return 1;
137  fi
138
139  return 0;
140}
141
142# ---------------------------------------------------------------------------
143# Apply a patch and check it goes in cleanly
144# First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
145
146applyPatch () {
147  echo -n "Applying $1 (${name})... "
148  if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
149  then
150    echo "done."
151  else
152    echo "failed. Clean up yourself."
153    return 1;
154  fi
155  if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
156  then
157    echo "Aborting. Reject files found."
158    return 1;
159  fi
160  # Remove backup files
161  find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
162 
163  return 0;
164}
165
166# ---------------------------------------------------------------------------
167# arg1 is patch filename
168reversePatch () {
169    echo -n "Reversing $1 (${name}) ... "
170    if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir
171    then
172        echo "done."
173    else
174        echo "failed. Clean it up."
175        exit 1
176    fi
177    if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
178    then
179        echo "Aborting. Reject files found."
180        return 1
181    fi
182    # Remove backup files
183    find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
184
185    return 0
186}
187
188# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
189# force $TMPFILEs below to be in local directory: a slash character prevents
190# the dot command from using the search path.
191TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
192grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
193tr -d [:blank:] < $TMPFILE > $TMPFILE.1
194. $TMPFILE.1
195rm -f $TMPFILE*
196if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
197then
198    echo "unable to determine current kernel version" >&2
199    exit 1
200fi
201
202NAME=`grep ^NAME $sourcedir/Makefile`
203NAME=${NAME##*=}
204
205echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
206
207# strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
208EXTRAVER=
209if [ x$EXTRAVERSION != "x" ]
210then
211    EXTRAVER=${EXTRAVERSION#.}
212    EXTRAVER=${EXTRAVER%%[[:punct:]]*}
213    #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
214fi
215
216#echo "stopvers=$stopvers"
217if [ $stopvers != "default" ]; then
218    STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
219    STOPEXTRA=`echo $stopvers | cut -d. -f4`
220    STOPFULLVERSION=${stopvers%%.$STOPEXTRA}
221    #echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
222else
223    STOPSUBLEVEL=9999
224    STOPEXTRA=9999
225fi
226
227# This all assumes a 2.6.x[.y] kernel tree.
228# Don't allow backwards/reverse patching.
229if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
230    backwards
231fi
232
233if [ x$EXTRAVER != "x" ]; then
234    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
235else
236    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
237fi
238
239if [ x$EXTRAVER != "x" ]; then
240    echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"
241    patch="patch-${CURRENTFULLVERSION}"
242    findFile $patchdir/${patch} || noFile ${patch}
243    reversePatch ${patch} || exit 1
244fi
245
246# now current is 2.6.x, with no EXTRA applied,
247# so update to target SUBLEVEL (2.6.SUBLEVEL)
248# and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.
249# If not ending sublevel is specified, it is incremented until
250# no further sublevels are found.
251
252if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then
253while : # incrementing SUBLEVEL (s in v.p.s)
254do
255    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
256    EXTRAVER=
257    if [ x$STOPFULLVERSION = x$CURRENTFULLVERSION ]; then
258        echo "Stopping at $CURRENTFULLVERSION base as requested."
259        break
260    fi
261
262    SUBLEVEL=$(($SUBLEVEL + 1))
263    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
264    #echo "#___ trying $FULLVERSION ___"
265
266    if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
267    echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
268    exit 1
269    fi
270
271    patch=patch-$FULLVERSION
272    # See if the file exists and find extension
273    findFile $patchdir/${patch} || noFile ${patch}
274
275    # Apply the patch and check all is OK
276    applyPatch $patch || break
277done
278#echo "#___sublevel all done"
279fi
280
281# There is no incremental searching for extraversion...
282if [ "$STOPEXTRA" != "" ]; then
283while : # just to allow break
284do
285# apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)
286    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"
287    #echo "#... trying $FULLVERSION ..."
288    patch=patch-$FULLVERSION
289
290    # See if the file exists and find extension
291    findFile $patchdir/${patch} || noFile ${patch}
292
293    # Apply the patch and check all is OK
294    applyPatch $patch || break
295    #echo "#___extraver all done"
296    break
297done
298fi
299
300if [ x$gotac != x ]; then
301  # Out great user wants the -ac patches
302    # They could have done -ac (get latest) or -acxx where xx=version they want
303    if [ $gotac = "-ac" ]; then
304      # They want the latest version
305        HIGHESTPATCH=0
306        for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
307        do
308            ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
309            # Check it is actually a recognised patch type
310            findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
311
312          if [ $ACVALUE -gt $HIGHESTPATCH ]; then
313              HIGHESTPATCH=$ACVALUE
314          fi
315        done
316
317        if [ $HIGHESTPATCH -ne 0 ]; then
318            findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
319            applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
320        else
321          echo "No -ac patches found"
322        fi
323    else
324      # They want an exact version
325        findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
326          echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION. Hohum."
327            exit 1
328        }
329        applyPatch patch-${CURRENTFULLVERSION}${gotac}
330    fi
331fi
332

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