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 62PNAME=patch-kernel 63 64# Set directories from arguments, or use defaults. 65sourcedir=${1-/usr/src/linux} 66patchdir=${2-.} 67stopvers=${3-default} 68 69if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then 70cat << USAGE 71usage: $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>. 75USAGE 76exit 1 77fi 78 79# See if we have any -ac options 80for PARM in $* 81do 82 case $PARM in 83 -ac*) 84 gotac=$PARM; 85 86 esac; 87done 88 89# --------------------------------------------------------------------------- 90# arg1 is filename 91noFile () { 92 echo "cannot find patch file: ${patch}" 93 exit 1 94} 95 96# --------------------------------------------------------------------------- 97backwards () { 98 echo "$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 105findFile () { 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 147applyPatch () { 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 169reversePatch () { 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. 192TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; } 193grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE 194tr -d [:blank:] < $TMPFILE > $TMPFILE.1 195. $TMPFILE.1 196rm -f $TMPFILE* 197if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ] 198then 199 echo "unable to determine current kernel version" >&2 200 exit 1 201fi 202 203NAME=`grep ^NAME $sourcedir/Makefile` 204NAME=${NAME##*=} 205 206echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)" 207 208# strip EXTRAVERSION to just a number (drop leading '.' and trailing additions) 209EXTRAVER= 210if [ x$EXTRAVERSION != "x" ] 211then 212 EXTRAVER=${EXTRAVERSION#.} 213 EXTRAVER=${EXTRAVER%%[[:punct:]]*} 214 #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER" 215fi 216 217#echo "stopvers=$stopvers" 218if [ $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/" 223else 224 STOPSUBLEVEL=9999 225 STOPEXTRA=9999 226fi 227 228# This all assumes a 2.6.x[.y] kernel tree. 229# Don't allow backwards/reverse patching. 230if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then 231 backwards 232fi 233 234if [ x$EXTRAVER != "x" ]; then 235 CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER" 236else 237 CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL" 238fi 239 240if [ x$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 245fi 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 253if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then 254while : # incrementing SUBLEVEL (s in v.p.s) 255do 256 CURRENTFULLVERSION="$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 $patch || break 278done 279#echo "#___sublevel all done" 280fi 281 282# There is no incremental searching for extraversion... 283if [ "$STOPEXTRA" != "" ]; then 284while : # just to allow break 285do 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 $patch || break 296 #echo "#___extraver all done" 297 break 298done 299fi 300 301if [ x$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 332fi 333