scripts/patch-kernel

   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