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 # Set directories from arguments, or use defaults.
  45 sourcedir=${1-/usr/src/linux}
  46 patchdir=${2-.}
  47 stopvers=${3-imnotaversion}
  48
  49 if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
  50 cat << USAGE
  51 usage: patch-kernel [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
  52   The source directory defaults to /usr/src/linux, and
  53   the patch directory defaults to the current directory.
  54 USAGE
  55 exit 1
  56 fi
  57
  58 # See if we have any -ac options
  59 for PARM in $*
  60 do
  61   case $PARM in
  62           -ac*)
  63                   gotac=$PARM;
  64
  65         esac;
  66 done
  67
  68 # ---------------------------------------------------------------------------
  69 # Find a file, first parameter is basename of file
  70 # it tries many compression mechanisms and sets variables to say how to get it
  71 findFile () {
  72   filebase=$1;
  73
  74   if [ -r ${filebase}.gz ]; then
  75                 ext=".gz"
  76                 name="gzip"
  77                 uncomp="gunzip -dc"
  78   elif [ -r ${filebase}.bz  ]; then
  79                 ext=".bz"
  80     name="bzip"
  81                 uncomp="bunzip -dc"
  82   elif [ -r ${filebase}.bz2 ]; then
  83                 ext=".bz2"
  84                 name="bzip2"
  85                 uncomp="bunzip2 -dc"
  86   elif [ -r ${filebase}.zip ]; then
  87                 ext=".zip"
  88                 name="zip"
  89                 uncomp="unzip -d"
  90   elif [ -r ${filebase}.Z ]; then
  91                 ext=".Z"
  92                 name="uncompress"
  93                 uncomp="uncompress -c"
  94   elif [ -r ${filebase} ]; then
  95                 ext=""
  96                 name="plaintext"
  97                 uncomp="cat"
  98   else
  99           return 1;
 100         fi
 101
 102   return 0;
 103 }
 104
 105 # ---------------------------------------------------------------------------
 106 # Apply a patch and check it goes in cleanly
 107 # First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
 108
 109 applyPatch () {
 110   echo -n "Applying $1 (${name})... "
 111   if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
 112   then
 113     echo "done."
 114   else
 115     echo "failed.  Clean up yourself."
 116     return 1;
 117   fi
 118   if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
 119   then
 120     echo "Aborting.  Reject files found."
 121     return 1;
 122   fi
 123   # Remove backup files
 124   find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
 125
 126   return 0;
 127 }
 128
 129 # set current VERSION, PATCHLEVEL, SUBLEVEL, EXTERVERSION
 130 eval `sed -n -e 's/^\([A-Z]*\) = \([0-9]*\)$/\1=\2/p' -e 's/^\([A-Z]*\) = \(-[-a-z0-9]*\)$/\1=\2/p' $sourcedir/Makefile`
 131 if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
 132 then
 133     echo "unable to determine current kernel version" >&2
 134     exit 1
 135 fi
 136
 137 echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION}"
 138
 139 if [ x$EXTRAVERSION != "x" ]
 140 then
 141   echo "I'm sorry but patch-kernel can't work with a kernel source tree that is not a base version"
 142         exit 1;
 143 fi
 144
 145 while :
 146 do
 147     CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 148     if [ $stopvers = $CURRENTFULLVERSION ]
 149     then
 150         echo "Stoping at $CURRENTFULLVERSION base as requested."
 151         break
 152     fi
 153
 154     SUBLEVEL=`expr $SUBLEVEL + 1`
 155     FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
 156
 157     patch=patch-$FULLVERSION
 158
 159                 # See if the file exists and find extension
 160                 findFile $patchdir/${patch} || break
 161
 162     # Apply the patch and check all is OK
 163     applyPatch $patch || break
 164 done
 165
 166 if [ x$gotac != x ]; then
 167   # Out great user wants the -ac patches
 168         # They could have done -ac (get latest) or -acxx where xx=version they want
 169         if [ $gotac == "-ac" ]
 170         then
 171           # They want the latest version
 172                 HIGHESTPATCH=0
 173                 for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
 174                 do
 175                         ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
 176                         # Check it is actually a recognised patch type
 177                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
 178
 179                   if [ $ACVALUE -gt $HIGHESTPATCH ]
 180                         then
 181                           HIGHESTPATCH=$ACVALUE
 182                   fi
 183                 done
 184
 185                 if [ $HIGHESTPATCH -ne 0 ]
 186                 then
 187                         findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
 188                         applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
 189                 else
 190                   echo "No ac patches found"
 191                 fi
 192         else
 193           # They want an exact version
 194                 findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
 195                   echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION.  Hohum."
 196                         exit 1
 197                 }
 198                 applyPatch patch-${CURRENTFULLVERSION}${gotac}
 199         fi
 200 fi
 201
 202