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kernel add
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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" ]; then
cat << USAGE
usage: $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>.
USAGE
exit 1
fi
# See if we have any -ac options
for PARM in $*
do
case $PARM in
-ac*)
gotac=$PARM;
esac;
done
# ---------------------------------------------------------------------------
# arg1 is filename
noFile () {
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 it
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}.xz ]; then
ext=".xz"
name="xz"
uncomp="xz -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 filename
reversePatch () {
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 > $TMPFILE
tr -d [:blank:] < $TMPFILE > $TMPFILE.1
. $TMPFILE.1
rm -f $TMPFILE*
if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
then
echo "unable to determine current kernel version" >&2
exit 1
fi
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=9999
fi
# This all assumes a 2.6.x[.y] kernel tree.
# Don't allow backwards/reverse patching.
if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
backwards
fi
if [ x$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 1
fi
# 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 $SUBLEVEL ]; then
while : # incrementing SUBLEVEL (s in v.p.s)
do
CURRENTFULLVERSION="$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 $patch || break
done
#echo "#___sublevel all done"
fi
# There is no incremental searching for extraversion...
if [ "$STOPEXTRA" != "" ]; then
while : # just to allow break
do
# 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 $patch || break
#echo "#___extraver all done"
break
done
fi
if [ x$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}
fi
fi
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