#! /bin/sh# Script to apply kernel patches.#   usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]#     The source directory defaults to /usr/src/linux, and the patch#     directory defaults to the current directory.# e.g.#   scripts/patch-kernel . ..#      Update the kernel tree in the current directory using patches in the#      directory above to the latest Linus kernel#   scripts/patch-kernel . .. -ac#      Get the latest Linux kernel and patch it with the latest ac patch#   scripts/patch-kernel . .. 2.4.9#      Gets standard kernel 2.4.9#   scripts/patch-kernel . .. 2.4.9 -ac#      Gets 2.4.9 with latest ac patches#   scripts/patch-kernel . .. 2.4.9 -ac11#      Gets 2.4.9 with ac patch ac11#   Note: It uses the patches relative to the Linus kernels, not the#   ac to ac relative patches## It determines the current kernel version from the top-level Makefile.# It then looks for patches for the next sublevel in the patch directory.# This is applied using "patch -p1 -s" from within the kernel directory.# A check is then made for "*.rej" files to see if the patch was# successful.  If it is, then all of the "*.orig" files are removed.##       Nick Holloway <Nick.Holloway@alfie.demon.co.uk>, 2nd January 1995.## Added support for handling multiple types of compression. What includes# gzip, bzip, bzip2, zip, compress, and plaintext. ##       Adam Sulmicki <adam@cfar.umd.edu>, 1st January 1997.## Added ability to stop at a given version number# Put the full version number (i.e. 2.3.31) as the last parameter#       Dave Gilbert <linux@treblig.org>, 11th December 1999.# Fixed previous patch so that if we are already at the correct version# not to patch up.## Added -ac option, use -ac or -ac9 (say) to stop at a particular version#       Dave Gilbert <linux@treblig.org>, 29th September 2001.# Set directories from arguments, or use defaults.sourcedir=${1-/usr/src/linux}patchdir=${2-.}stopvers=${3-imnotaversion}# See if we have any -ac optionsfor PARM in $*do  case $PARM in	  -ac*)		  gotac=$PARM;	esac;done# ---------------------------------------------------------------------------# Find a file, first parameter is basename of file# it tries many compression mechanisms and sets variables to say how to get itfunction findFile {  filebase=$1;  if [ -r ${filebase}.gz ]; then		ext=".gz"		name="gzip"		uncomp="gunzip -dc"  elif [ -r ${filebase}.bz  ]; then		ext=".bz"    name="bzip"		uncomp="bunzip -dc"  elif [ -r ${filebase}.bz2 ]; then		ext=".bz2"		name="bzip2"		uncomp="bunzip2 -dc"  elif [ -r ${filebase}.zip ]; then		ext=".zip"		name="zip"		uncomp="unzip -d"  elif [ -r ${filebase}.Z ]; then		ext=".Z"		name="uncompress"		uncomp="uncompress -c"  elif [ -r ${filebase} ]; then		ext=""		name="plaintext"		uncomp="cat"  else	  return 1;	fi  return 0;}# ---------------------------------------------------------------------------# Apply a patch and check it goes in cleanly# First param is patch name (e.g. patch-2.4.9-ac5) - without path or extensionfunction applyPatch {  echo -n "Applying $1 (${name})... "  if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir  then    echo "done."  else    echo "failed.  Clean up yourself."    return 1;  fi  if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]  then    echo "Aborting.  Reject files found."    return 1;  fi  # Remove backup files  find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;   return 0;}# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTERVERSIONeval `sed -n -e 's/^\([A-Z]*\) = \([0-9]*\)$/\1=\2/p' -e 's/^\([A-Z]*\) = \(-[-a-z0-9]*\)$/\1=\2/p' $sourcedir/Makefile`if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]then    echo "unable to determine current kernel version" >&2    exit 1fiecho "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION}"if [ x$EXTRAVERSION != "x" ]then  echo "I'm sorry but patch-kernel can't work with a kernel source tree that is not a base version"	exit 1;fiwhile :do    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"    if [ $stopvers = $CURRENTFULLVERSION ]    then        echo "Stoping at $CURRENTFULLVERSION base as requested."        break    fi    SUBLEVEL=`expr $SUBLEVEL + 1`    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"    patch=patch-$FULLVERSION		# See if the file exists and find extension		findFile $patchdir/${patch} || break    # Apply the patch and check all is OK    applyPatch $patch || breakdoneif [ x$gotac != x ]; then  # Out great user wants the -ac patches	# They could have done -ac (get latest) or -acxx where xx=version they want	if [ $gotac == "-ac" ]	then	  # They want the latest version		HIGHESTPATCH=0		for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*		do			ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`			# Check it is actually a recognised patch type			findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break		  if [ $ACVALUE -gt $HIGHESTPATCH ]			then			  HIGHESTPATCH=$ACVALUE		  fi		done		if [ $HIGHESTPATCH -ne 0 ]		then			findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break			applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}		else		  echo "No ac patches found"		fi	else	  # They want an exact version		findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {		  echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION.  Hohum."			exit 1		}		applyPatch patch-${CURRENTFULLVERSION}${gotac}	fifi