Root/scripts/patch-kernel

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}.zip ]; then
120        ext=".zip"
121        name="zip"
122        uncomp="unzip -d"
123  elif [ -r ${filebase}.Z ]; then
124        ext=".Z"
125        name="uncompress"
126        uncomp="uncompress -c"
127  elif [ -r ${filebase} ]; then
128        ext=""
129        name="plaintext"
130        uncomp="cat"
131  else
132    return 1;
133  fi
134
135  return 0;
136}
137
138# ---------------------------------------------------------------------------
139# Apply a patch and check it goes in cleanly
140# First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
141
142applyPatch () {
143  echo -n "Applying $1 (${name})... "
144  if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
145  then
146    echo "done."
147  else
148    echo "failed. Clean up yourself."
149    return 1;
150  fi
151  if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
152  then
153    echo "Aborting. Reject files found."
154    return 1;
155  fi
156  # Remove backup files
157  find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
158 
159  return 0;
160}
161
162# ---------------------------------------------------------------------------
163# arg1 is patch filename
164reversePatch () {
165    echo -n "Reversing $1 (${name}) ... "
166    if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir
167    then
168        echo "done."
169    else
170        echo "failed. Clean it up."
171        exit 1
172    fi
173    if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
174    then
175        echo "Aborting. Reject files found."
176        return 1
177    fi
178    # Remove backup files
179    find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
180
181    return 0
182}
183
184# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
185# force $TMPFILEs below to be in local directory: a slash character prevents
186# the dot command from using the search path.
187TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
188grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
189tr -d [:blank:] < $TMPFILE > $TMPFILE.1
190. $TMPFILE.1
191rm -f $TMPFILE*
192if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
193then
194    echo "unable to determine current kernel version" >&2
195    exit 1
196fi
197
198NAME=`grep ^NAME $sourcedir/Makefile`
199NAME=${NAME##*=}
200
201echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
202
203# strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
204EXTRAVER=
205if [ x$EXTRAVERSION != "x" ]
206then
207    EXTRAVER=${EXTRAVERSION#.}
208    EXTRAVER=${EXTRAVER%%[[:punct:]]*}
209    #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
210fi
211
212#echo "stopvers=$stopvers"
213if [ $stopvers != "default" ]; then
214    STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
215    STOPEXTRA=`echo $stopvers | cut -d. -f4`
216    STOPFULLVERSION=${stopvers%%.$STOPEXTRA}
217    #echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
218else
219    STOPSUBLEVEL=9999
220    STOPEXTRA=9999
221fi
222
223# This all assumes a 2.6.x[.y] kernel tree.
224# Don't allow backwards/reverse patching.
225if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
226    backwards
227fi
228
229if [ x$EXTRAVER != "x" ]; then
230    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
231else
232    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
233fi
234
235if [ x$EXTRAVER != "x" ]; then
236    echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"
237    patch="patch-${CURRENTFULLVERSION}"
238    findFile $patchdir/${patch} || noFile ${patch}
239    reversePatch ${patch} || exit 1
240fi
241
242# now current is 2.6.x, with no EXTRA applied,
243# so update to target SUBLEVEL (2.6.SUBLEVEL)
244# and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.
245# If not ending sublevel is specified, it is incremented until
246# no further sublevels are found.
247
248if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then
249while : # incrementing SUBLEVEL (s in v.p.s)
250do
251    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
252    EXTRAVER=
253    if [ $STOPFULLVERSION = $CURRENTFULLVERSION ]; then
254        echo "Stopping at $CURRENTFULLVERSION base as requested."
255        break
256    fi
257
258    SUBLEVEL=$(($SUBLEVEL + 1))
259    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
260    #echo "#___ trying $FULLVERSION ___"
261
262    if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
263    echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
264    exit 1
265    fi
266
267    patch=patch-$FULLVERSION
268    # See if the file exists and find extension
269    findFile $patchdir/${patch} || noFile ${patch}
270
271    # Apply the patch and check all is OK
272    applyPatch $patch || break
273done
274#echo "#___sublevel all done"
275fi
276
277# There is no incremental searching for extraversion...
278if [ "$STOPEXTRA" != "" ]; then
279while : # just to allow break
280do
281# apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)
282    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"
283    #echo "#... trying $FULLVERSION ..."
284    patch=patch-$FULLVERSION
285
286    # See if the file exists and find extension
287    findFile $patchdir/${patch} || noFile ${patch}
288
289    # Apply the patch and check all is OK
290    applyPatch $patch || break
291    #echo "#___extraver all done"
292    break
293done
294fi
295
296if [ x$gotac != x ]; then
297  # Out great user wants the -ac patches
298    # They could have done -ac (get latest) or -acxx where xx=version they want
299    if [ $gotac = "-ac" ]; then
300      # They want the latest version
301        HIGHESTPATCH=0
302        for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
303        do
304            ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
305            # Check it is actually a recognised patch type
306            findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
307
308          if [ $ACVALUE -gt $HIGHESTPATCH ]; then
309              HIGHESTPATCH=$ACVALUE
310          fi
311        done
312
313        if [ $HIGHESTPATCH -ne 0 ]; then
314            findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
315            applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
316        else
317          echo "No -ac patches found"
318        fi
319    else
320      # They want an exact version
321        findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
322          echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION. Hohum."
323            exit 1
324        }
325        applyPatch patch-${CURRENTFULLVERSION}${gotac}
326    fi
327fi
328

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