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
  61 PNAME=patch-kernel
  62
  63 # Set directories from arguments, or use defaults.
  64 sourcedir=${1-/usr/src/linux}
  65 patchdir=${2-.}
  66 stopvers=${3-default}
  67
  68 if [ "$1" == -h -o "$1" == --help -o ! -r "$sourcedir/Makefile" ]; then
  69 cat << USAGE
  70 usage: $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>.
  74 USAGE
  75 exit 1
  76 fi
  77
  78 # See if we have any -ac options
  79 for PARM in $*
  80 do
  81   case $PARM in
  82           -ac*)
  83                   gotac=$PARM;
  84
  85         esac;
  86 done
  87
  88 # ---------------------------------------------------------------------------
  89 # arg1 is filename
  90 noFile () {
  91         echo "cannot find patch file: ${patch}"
  92         exit 1
  93 }
  94
  95 # ---------------------------------------------------------------------------
  96 backwards () {
  97         echo "$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
 104 findFile () {
 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
 142 applyPatch () {
 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
 164 reversePatch () {
 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 TMPFILE=`mktemp .tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
 186 grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
 187 tr -d [:blank:] < $TMPFILE > $TMPFILE.1
 188 source $TMPFILE.1
 189 rm -f $TMPFILE*
 190 if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
 191 then
 192     echo "unable to determine current kernel version" >&2
 193     exit 1
 194 fi
 195
 196 NAME=`grep ^NAME $sourcedir/Makefile`
 197 NAME=${NAME##*=}
 198
 199 echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
 200
 201 # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
 202 EXTRAVER=
 203 if [ x$EXTRAVERSION != "x" ]
 204 then
 205         if [ ${EXTRAVERSION:0:1} == "." ]; then
 206                 EXTRAVER=${EXTRAVERSION:1}
 207         else
 208                 EXTRAVER=$EXTRAVERSION
 209         fi
 210         EXTRAVER=${EXTRAVER%%[[:punct:]]*}
 211         #echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
 212 fi
 213
 214 #echo "stopvers=$stopvers"
 215 if [ $stopvers != "default" ]; then
 216         STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
 217         STOPEXTRA=`echo $stopvers | cut -d. -f4`
 218         #echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
 219 else
 220         STOPSUBLEVEL=9999
 221         STOPEXTRA=9999
 222 fi
 223
 224 # This all assumes a 2.6.x[.y] kernel tree.
 225 # Don't allow backwards/reverse patching.
 226 if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
 227         backwards
 228 fi
 229
 230 if [ x$EXTRAVER != "x" ]; then
 231         CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
 232 else
 233         CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 234 fi
 235
 236 if [ x$EXTRAVER != "x" ]; then
 237         echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"
 238         patch="patch-${CURRENTFULLVERSION}"
 239         findFile $patchdir/${patch} || noFile ${patch}
 240         reversePatch ${patch} || exit 1
 241 fi
 242
 243 # now current is 2.6.x, with no EXTRA applied,
 244 # so update to target SUBLEVEL (2.6.SUBLEVEL)
 245 # and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.
 246 # If not ending sublevel is specified, it is incremented until
 247 # no further sublevels are found.
 248
 249 if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then
 250 while :                         # incrementing SUBLEVEL (s in v.p.s)
 251 do
 252     CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 253     EXTRAVER=
 254     if [ $stopvers == $CURRENTFULLVERSION ]; then
 255         echo "Stopping at $CURRENTFULLVERSION base as requested."
 256         break
 257     fi
 258
 259     SUBLEVEL=$((SUBLEVEL + 1))
 260     FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 261     #echo "#___ trying $FULLVERSION ___"
 262
 263     if [ $((SUBLEVEL)) -gt $((STOPSUBLEVEL)) ]; then
 264         echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
 265         exit 1
 266     fi
 267
 268     patch=patch-$FULLVERSION
 269     # See if the file exists and find extension
 270     findFile $patchdir/${patch} || noFile ${patch}
 271
 272     # Apply the patch and check all is OK
 273     applyPatch $patch || break
 274 done
 275 #echo "#___sublevel all done"
 276 fi
 277
 278 # There is no incremental searching for extraversion...
 279 if [ "$STOPEXTRA" != "" ]; then
 280 while :                         # just to allow break
 281 do
 282 # apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)
 283         FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"
 284         #echo "#... trying $FULLVERSION ..."
 285         patch=patch-$FULLVERSION
 286
 287         # See if the file exists and find extension
 288         findFile $patchdir/${patch} || noFile ${patch}
 289
 290         # Apply the patch and check all is OK
 291         applyPatch $patch || break
 292         #echo "#___extraver all done"
 293         break
 294 done
 295 fi
 296
 297 if [ x$gotac != x ]; then
 298   # Out great user wants the -ac patches
 299         # They could have done -ac (get latest) or -acxx where xx=version they want
 300         if [ $gotac == "-ac" ]; then
 301           # They want the latest version
 302                 HIGHESTPATCH=0
 303                 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
 304                 do
 305                         ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
 306                         # Check it is actually a recognised patch type
 307                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
 308
 309                   if [ $ACVALUE -gt $HIGHESTPATCH ]; then
 310                           HIGHESTPATCH=$ACVALUE
 311                   fi
 312                 done
 313
 314                 if [ $HIGHESTPATCH -ne 0 ]; then
 315                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
 316                         applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
 317                 else
 318                   echo "No -ac patches found"
 319                 fi
 320         else
 321           # They want an exact version
 322                 findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
 323                   echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION.  Hohum."
 324                         exit 1
 325                 }
 326                 applyPatch patch-${CURRENTFULLVERSION}${gotac}
 327         fi
 328 fi