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#! /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.## Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.);# update usage message;# fix some whitespace damage;# be smarter about stopping when current version is larger than requested;#	Randy Dunlap <rdunlap@xenotime.net>, 2004-AUG-18.## Add better support for (non-incremental) 2.6.x.y patches;# If an ending version number if not specified, the script automatically# increments the SUBLEVEL (x in 2.6.x.y) until no more patch files are found;# however, EXTRAVERSION (y in 2.6.x.y) is never automatically incremented# but must be specified fully.## patch-kernel does not normally support reverse patching, but does so when# applying EXTRAVERSION (x.y) patches, so that moving from 2.6.11.y to 2.6.11.z# is easy and handled by the script (reverse 2.6.11.y and apply 2.6.11.z).#	Randy Dunlap <rdunlap@xenotime.net>, 2005-APR-08. PNAME=patch-kernel # Set directories from arguments, or use defaults.sourcedir=${1-/usr/src/linux}patchdir=${2-.}stopvers=${3-default} if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; thencat << USAGEusage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]  source directory defaults to /usr/src/linux,  patch directory defaults to the current directory,  stopversion defaults to <all in patchdir>.USAGEexit 1fi # See if we have any -ac optionsfor PARM in $*do  case $PARM in	  -ac*)		  gotac=$PARM; 	esac;done # ---------------------------------------------------------------------------# arg1 is filenamenoFile () {	echo "cannot find patch file: ${patch}"	exit 1} # ---------------------------------------------------------------------------backwards () {	echo "$PNAME does not support reverse patching"	exit 1} # ---------------------------------------------------------------------------# Find a file, first parameter is basename of file# it tries many compression mechanisms and sets variables to say how to get itfindFile () {  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 extension 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;} # ---------------------------------------------------------------------------# arg1 is patch filenamereversePatch () {	echo -n "Reversing $1 (${name}) ... "	if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir	then		echo "done."	else		echo "failed.  Clean it up."		exit 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, EXTRAVERSION# force $TMPFILEs below to be in local directory: a slash character prevents# the dot command from using the search path.TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILEtr -d [:blank:] < $TMPFILE > $TMPFILE.1. $TMPFILE.1rm -f $TMPFILE*if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]then    echo "unable to determine current kernel version" >&2    exit 1fi NAME=`grep ^NAME $sourcedir/Makefile`NAME=${NAME##*=} echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)" # strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)EXTRAVER=if [ x$EXTRAVERSION != "x" ]then	EXTRAVER=${EXTRAVERSION#.}	EXTRAVER=${EXTRAVER%%[[:punct:]]*}	#echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"fi #echo "stopvers=$stopvers"if [ $stopvers != "default" ]; then	STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`	STOPEXTRA=`echo $stopvers | cut -d. -f4`	STOPFULLVERSION=${stopvers%%.$STOPEXTRA}	#echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"else	STOPSUBLEVEL=9999	STOPEXTRA=9999fi # This all assumes a 2.6.x[.y] kernel tree.# Don't allow backwards/reverse patching.if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then	backwardsfi if [ x$EXTRAVER != "x" ]; then	CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"else	CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"fi if [ x$EXTRAVER != "x" ]; then	echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"	patch="patch-${CURRENTFULLVERSION}"	findFile $patchdir/${patch} || noFile ${patch}	reversePatch ${patch} || exit 1fi # now current is 2.6.x, with no EXTRA applied,# so update to target SUBLEVEL (2.6.SUBLEVEL)# and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.# If not ending sublevel is specified, it is incremented until# no further sublevels are found. if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; thenwhile :				# incrementing SUBLEVEL (s in v.p.s)do    CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"    EXTRAVER=    if [ x$STOPFULLVERSION = x$CURRENTFULLVERSION ]; then        echo "Stopping at $CURRENTFULLVERSION base as requested."        break    fi     SUBLEVEL=$(($SUBLEVEL + 1))    FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"    #echo "#___ trying $FULLVERSION ___"     if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then	echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"	exit 1    fi     patch=patch-$FULLVERSION    # See if the file exists and find extension    findFile $patchdir/${patch} || noFile ${patch}     # Apply the patch and check all is OK    applyPatch $patch || breakdone#echo "#___sublevel all done"fi # There is no incremental searching for extraversion...if [ "$STOPEXTRA" != "" ]; thenwhile :				# just to allow breakdo# apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)	FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"	#echo "#... trying $FULLVERSION ..."	patch=patch-$FULLVERSION 	# See if the file exists and find extension	findFile $patchdir/${patch} || noFile ${patch} 	# Apply the patch and check all is OK	applyPatch $patch || break	#echo "#___extraver all done"	breakdonefi if [ x$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