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 <rddunlap@osdl.org>, 2004-AUG-18.
  49
  50 # Set directories from arguments, or use defaults.
  51 sourcedir=${1-/usr/src/linux}
  52 patchdir=${2-.}
  53 stopvers=${3-default}
  54
  55 if [ "$1" == -h -o "$1" == --help -o ! -r "$sourcedir/Makefile" ]; then
  56 cat << USAGE
  57 usage: patch-kernel [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
  58   source directory defaults to /usr/src/linux,
  59   patch directory defaults to the current directory,
  60   stopversion defaults to <all in patchdir>.
  61 USAGE
  62 exit 1
  63 fi
  64
  65 # See if we have any -ac options
  66 for PARM in $*
  67 do
  68   case $PARM in
  69           -ac*)
  70                   gotac=$PARM;
  71
  72         esac;
  73 done
  74
  75 # ---------------------------------------------------------------------------
  76 # Find a file, first parameter is basename of file
  77 # it tries many compression mechanisms and sets variables to say how to get it
  78 findFile () {
  79   filebase=$1;
  80
  81   if [ -r ${filebase}.gz ]; then
  82                 ext=".gz"
  83                 name="gzip"
  84                 uncomp="gunzip -dc"
  85   elif [ -r ${filebase}.bz  ]; then
  86                 ext=".bz"
  87                 name="bzip"
  88                 uncomp="bunzip -dc"
  89   elif [ -r ${filebase}.bz2 ]; then
  90                 ext=".bz2"
  91                 name="bzip2"
  92                 uncomp="bunzip2 -dc"
  93   elif [ -r ${filebase}.zip ]; then
  94                 ext=".zip"
  95                 name="zip"
  96                 uncomp="unzip -d"
  97   elif [ -r ${filebase}.Z ]; then
  98                 ext=".Z"
  99                 name="uncompress"
 100                 uncomp="uncompress -c"
 101   elif [ -r ${filebase} ]; then
 102                 ext=""
 103                 name="plaintext"
 104                 uncomp="cat"
 105   else
 106         return 1;
 107   fi
 108
 109   return 0;
 110 }
 111
 112 # ---------------------------------------------------------------------------
 113 # Apply a patch and check it goes in cleanly
 114 # First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
 115
 116 applyPatch () {
 117   echo -n "Applying $1 (${name})... "
 118   if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
 119   then
 120     echo "done."
 121   else
 122     echo "failed.  Clean up yourself."
 123     return 1;
 124   fi
 125   if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
 126   then
 127     echo "Aborting.  Reject files found."
 128     return 1;
 129   fi
 130   # Remove backup files
 131   find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
 132
 133   return 0;
 134 }
 135
 136 # set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
 137 TMPFILE=`mktemp .tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
 138 grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
 139 tr -d [:blank:] < $TMPFILE > $TMPFILE.1
 140 source $TMPFILE.1
 141 rm -f $TMPFILE*
 142 if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
 143 then
 144     echo "unable to determine current kernel version" >&2
 145     exit 1
 146 fi
 147
 148 NAME=`grep ^NAME $sourcedir/Makefile`
 149 NAME=${NAME##*=}
 150
 151 echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
 152
 153 # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
 154 EXTRAVER=
 155 if [ x$EXTRAVERSION != "x" ]
 156 then
 157         if [ ${EXTRAVERSION:0:1} == "." ]; then
 158                 EXTRAVER=${EXTRAVERSION:1}
 159         else
 160                 EXTRAVER=$EXTRAVERSION
 161         fi
 162         EXTRAVER=${EXTRAVER%%[[:punct:]]*}
 163         #echo "patch-kernel: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
 164 fi
 165
 166 #echo "stopvers=$stopvers"
 167 if [ $stopvers != "default" ]; then
 168         STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
 169         STOPEXTRA=`echo $stopvers | cut -d. -f4`
 170         #echo "STOPSUBLEVEL=$STOPSUBLEVEL, STOPEXTRA=$STOPEXTRA"
 171 else
 172         STOPSUBLEVEL=9999
 173         STOPEXTRA=9999
 174 fi
 175
 176 while :                         # incrementing SUBLEVEL (s in v.p.s)
 177 do
 178     if [ x$EXTRAVER != "x" ]; then
 179         CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
 180     else
 181         CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 182     fi
 183
 184     if [ $stopvers == $CURRENTFULLVERSION ]; then
 185         echo "Stopping at $CURRENTFULLVERSION base as requested."
 186         break
 187     fi
 188
 189     while :                     # incrementing EXTRAVER (x in v.p.s.x)
 190     do
 191         EXTRAVER=$((EXTRAVER + 1))
 192         FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
 193         #echo "... trying $FULLVERSION ..."
 194
 195         patch=patch-$FULLVERSION
 196
 197         # See if the file exists and find extension
 198         findFile $patchdir/${patch} || break
 199
 200         # Apply the patch and check all is OK
 201         applyPatch $patch || break
 202
 203         continue 2
 204     done
 205
 206     EXTRAVER=
 207     SUBLEVEL=$((SUBLEVEL + 1))
 208     FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 209     #echo "___ trying $FULLVERSION ___"
 210
 211     if [ $((SUBLEVEL)) -gt $((STOPSUBLEVEL)) ]; then
 212         echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
 213         exit 1
 214     fi
 215
 216     patch=patch-$FULLVERSION
 217
 218     # See if the file exists and find extension
 219     findFile $patchdir/${patch} || break
 220
 221     # Apply the patch and check all is OK
 222     applyPatch $patch || break
 223 done
 224 #echo "base all done"
 225
 226 if [ x$gotac != x ]; then
 227   # Out great user wants the -ac patches
 228         # They could have done -ac (get latest) or -acxx where xx=version they want
 229         if [ $gotac == "-ac" ]; then
 230           # They want the latest version
 231                 HIGHESTPATCH=0
 232                 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
 233                 do
 234                         ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
 235                         # Check it is actually a recognised patch type
 236                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
 237
 238                   if [ $ACVALUE -gt $HIGHESTPATCH ]; then
 239                           HIGHESTPATCH=$ACVALUE
 240                   fi
 241                 done
 242
 243                 if [ $HIGHESTPATCH -ne 0 ]; then
 244                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
 245                         applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
 246                 else
 247                   echo "No -ac patches found"
 248                 fi
 249         else
 250           # They want an exact version
 251                 findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
 252                   echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION.  Hohum."
 253                         exit 1
 254                 }
 255                 applyPatch patch-${CURRENTFULLVERSION}${gotac}
 256         fi
 257 fi