patch-kernel

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    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

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