333 lines
9.9 KiB
Bash
Executable File
333 lines
9.9 KiB
Bash
Executable File
#! /bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# Script to apply kernel patches.
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# usage: patch-kernel [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
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# The source directory defaults to /usr/src/linux, and the patch
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# directory defaults to the current directory.
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# e.g.
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# scripts/patch-kernel . ..
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# Update the kernel tree in the current directory using patches in the
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# directory above to the latest Linus kernel
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# scripts/patch-kernel . .. -ac
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# Get the latest Linux kernel and patch it with the latest ac patch
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# scripts/patch-kernel . .. 2.4.9
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# Gets standard kernel 2.4.9
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# scripts/patch-kernel . .. 2.4.9 -ac
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# Gets 2.4.9 with latest ac patches
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# scripts/patch-kernel . .. 2.4.9 -ac11
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# Gets 2.4.9 with ac patch ac11
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# Note: It uses the patches relative to the Linus kernels, not the
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# ac to ac relative patches
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#
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# It determines the current kernel version from the top-level Makefile.
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# It then looks for patches for the next sublevel in the patch directory.
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# This is applied using "patch -p1 -s" from within the kernel directory.
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# A check is then made for "*.rej" files to see if the patch was
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# successful. If it is, then all of the "*.orig" files are removed.
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#
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# Nick Holloway <Nick.Holloway@alfie.demon.co.uk>, 2nd January 1995.
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#
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# Added support for handling multiple types of compression. What includes
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# gzip, bzip, bzip2, zip, compress, and plaintext.
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#
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# Adam Sulmicki <adam@cfar.umd.edu>, 1st January 1997.
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#
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# Added ability to stop at a given version number
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# Put the full version number (i.e. 2.3.31) as the last parameter
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# Dave Gilbert <linux@treblig.org>, 11th December 1999.
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# Fixed previous patch so that if we are already at the correct version
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# not to patch up.
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#
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# Added -ac option, use -ac or -ac9 (say) to stop at a particular version
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# Dave Gilbert <linux@treblig.org>, 29th September 2001.
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#
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# Add support for (use of) EXTRAVERSION (to support 2.6.8.x, e.g.);
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# update usage message;
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# fix some whitespace damage;
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# be smarter about stopping when current version is larger than requested;
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# Randy Dunlap <rdunlap@xenotime.net>, 2004-AUG-18.
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#
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# Add better support for (non-incremental) 2.6.x.y patches;
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# If an ending version number if not specified, the script automatically
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# increments the SUBLEVEL (x in 2.6.x.y) until no more patch files are found;
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# however, EXTRAVERSION (y in 2.6.x.y) is never automatically incremented
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# but must be specified fully.
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#
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# patch-kernel does not normally support reverse patching, but does so when
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# applying EXTRAVERSION (x.y) patches, so that moving from 2.6.11.y to 2.6.11.z
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# is easy and handled by the script (reverse 2.6.11.y and apply 2.6.11.z).
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# Randy Dunlap <rdunlap@xenotime.net>, 2005-APR-08.
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PNAME=patch-kernel
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# Set directories from arguments, or use defaults.
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sourcedir=${1-/usr/src/linux}
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patchdir=${2-.}
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stopvers=${3-default}
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if [ "$1" = -h -o "$1" = --help -o ! -r "$sourcedir/Makefile" ]; then
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cat << USAGE
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usage: $PNAME [-h] [ sourcedir [ patchdir [ stopversion ] [ -acxx ] ] ]
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source directory defaults to /usr/src/linux,
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patch directory defaults to the current directory,
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stopversion defaults to <all in patchdir>.
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USAGE
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exit 1
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fi
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# See if we have any -ac options
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for PARM in $*
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do
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case $PARM in
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-ac*)
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gotac=$PARM;
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esac;
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done
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# ---------------------------------------------------------------------------
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# arg1 is filename
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noFile () {
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echo "cannot find patch file: ${patch}"
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exit 1
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}
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# ---------------------------------------------------------------------------
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backwards () {
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echo "$PNAME does not support reverse patching"
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exit 1
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}
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# ---------------------------------------------------------------------------
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# Find a file, first parameter is basename of file
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# it tries many compression mechanisms and sets variables to say how to get it
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findFile () {
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filebase=$1;
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if [ -r ${filebase}.gz ]; then
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ext=".gz"
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name="gzip"
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uncomp="gunzip -dc"
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elif [ -r ${filebase}.bz ]; then
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ext=".bz"
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name="bzip"
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uncomp="bunzip -dc"
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elif [ -r ${filebase}.bz2 ]; then
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ext=".bz2"
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name="bzip2"
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uncomp="bunzip2 -dc"
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elif [ -r ${filebase}.xz ]; then
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ext=".xz"
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name="xz"
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uncomp="xz -dc"
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elif [ -r ${filebase}.zip ]; then
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ext=".zip"
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name="zip"
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uncomp="unzip -d"
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elif [ -r ${filebase}.Z ]; then
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ext=".Z"
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name="uncompress"
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uncomp="uncompress -c"
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elif [ -r ${filebase} ]; then
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ext=""
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name="plaintext"
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uncomp="cat"
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else
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return 1;
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fi
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return 0;
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}
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# ---------------------------------------------------------------------------
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# Apply a patch and check it goes in cleanly
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# First param is patch name (e.g. patch-2.4.9-ac5) - without path or extension
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applyPatch () {
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echo -n "Applying $1 (${name})... "
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if $uncomp ${patchdir}/$1${ext} | patch -p1 -s -N -E -d $sourcedir
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then
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echo "done."
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else
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echo "failed. Clean up yourself."
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return 1;
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fi
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if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
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then
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echo "Aborting. Reject files found."
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return 1;
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fi
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# Remove backup files
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find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
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return 0;
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}
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# ---------------------------------------------------------------------------
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# arg1 is patch filename
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reversePatch () {
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echo -n "Reversing $1 (${name}) ... "
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if $uncomp ${patchdir}/"$1"${ext} | patch -p1 -Rs -N -E -d $sourcedir
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then
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echo "done."
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else
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echo "failed. Clean it up."
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exit 1
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fi
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if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]
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then
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echo "Aborting. Reject files found."
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return 1
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fi
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# Remove backup files
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find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
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return 0
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}
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# set current VERSION, PATCHLEVEL, SUBLEVEL, EXTRAVERSION
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# force $TMPFILEs below to be in local directory: a slash character prevents
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# the dot command from using the search path.
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TMPFILE=`mktemp ./.tmpver.XXXXXX` || { echo "cannot make temp file" ; exit 1; }
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grep -E "^(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)" $sourcedir/Makefile > $TMPFILE
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tr -d [:blank:] < $TMPFILE > $TMPFILE.1
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. $TMPFILE.1
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rm -f $TMPFILE*
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if [ -z "$VERSION" -o -z "$PATCHLEVEL" -o -z "$SUBLEVEL" ]
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then
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echo "unable to determine current kernel version" >&2
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exit 1
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fi
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NAME=`grep ^NAME $sourcedir/Makefile`
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NAME=${NAME##*=}
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echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL${EXTRAVERSION} ($NAME)"
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# strip EXTRAVERSION to just a number (drop leading '.' and trailing additions)
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EXTRAVER=
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if [ x$EXTRAVERSION != "x" ]
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then
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EXTRAVER=${EXTRAVERSION#.}
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EXTRAVER=${EXTRAVER%%[[:punct:]]*}
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#echo "$PNAME: changing EXTRAVERSION from $EXTRAVERSION to $EXTRAVER"
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fi
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#echo "stopvers=$stopvers"
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if [ $stopvers != "default" ]; then
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STOPSUBLEVEL=`echo $stopvers | cut -d. -f3`
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STOPEXTRA=`echo $stopvers | cut -d. -f4`
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STOPFULLVERSION=${stopvers%%.$STOPEXTRA}
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#echo "#___STOPSUBLEVEL=/$STOPSUBLEVEL/, STOPEXTRA=/$STOPEXTRA/"
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else
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STOPSUBLEVEL=9999
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STOPEXTRA=9999
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fi
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# This all assumes a 2.6.x[.y] kernel tree.
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# Don't allow backwards/reverse patching.
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if [ $STOPSUBLEVEL -lt $SUBLEVEL ]; then
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backwards
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fi
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if [ x$EXTRAVER != "x" ]; then
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CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$EXTRAVER"
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else
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CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
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fi
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if [ x$EXTRAVER != "x" ]; then
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echo "backing up to: $VERSION.$PATCHLEVEL.$SUBLEVEL"
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patch="patch-${CURRENTFULLVERSION}"
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findFile $patchdir/${patch} || noFile ${patch}
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reversePatch ${patch} || exit 1
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fi
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# now current is 2.6.x, with no EXTRA applied,
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# so update to target SUBLEVEL (2.6.SUBLEVEL)
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# and then to target EXTRAVER (2.6.SUB.EXTRAVER) if requested.
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# If not ending sublevel is specified, it is incremented until
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# no further sublevels are found.
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if [ $STOPSUBLEVEL -gt $SUBLEVEL ]; then
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while : # incrementing SUBLEVEL (s in v.p.s)
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do
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CURRENTFULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
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EXTRAVER=
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if [ x$STOPFULLVERSION = x$CURRENTFULLVERSION ]; then
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echo "Stopping at $CURRENTFULLVERSION base as requested."
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break
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fi
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SUBLEVEL=$(($SUBLEVEL + 1))
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FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL"
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#echo "#___ trying $FULLVERSION ___"
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if [ $(($SUBLEVEL)) -gt $(($STOPSUBLEVEL)) ]; then
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echo "Stopping since sublevel ($SUBLEVEL) is beyond stop-sublevel ($STOPSUBLEVEL)"
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exit 1
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fi
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patch=patch-$FULLVERSION
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# See if the file exists and find extension
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findFile $patchdir/${patch} || noFile ${patch}
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# Apply the patch and check all is OK
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applyPatch $patch || break
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done
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#echo "#___sublevel all done"
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fi
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# There is no incremental searching for extraversion...
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if [ "$STOPEXTRA" != "" ]; then
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while : # just to allow break
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do
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# apply STOPEXTRA directly (not incrementally) (x in v.p.s.x)
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FULLVERSION="$VERSION.$PATCHLEVEL.$SUBLEVEL.$STOPEXTRA"
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#echo "#... trying $FULLVERSION ..."
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patch=patch-$FULLVERSION
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# See if the file exists and find extension
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findFile $patchdir/${patch} || noFile ${patch}
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# Apply the patch and check all is OK
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applyPatch $patch || break
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#echo "#___extraver all done"
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break
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done
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fi
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if [ x$gotac != x ]; then
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# Out great user wants the -ac patches
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# They could have done -ac (get latest) or -acxx where xx=version they want
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if [ $gotac = "-ac" ]; then
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# They want the latest version
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HIGHESTPATCH=0
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for PATCHNAMES in $patchdir/patch-${CURRENTFULLVERSION}-ac*\.*
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do
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ACVALUE=`echo $PATCHNAMES | sed -e 's/^.*patch-[0-9.]*-ac\([0-9]*\).*/\1/'`
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# Check it is actually a recognised patch type
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findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${ACVALUE} || break
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if [ $ACVALUE -gt $HIGHESTPATCH ]; then
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HIGHESTPATCH=$ACVALUE
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fi
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done
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if [ $HIGHESTPATCH -ne 0 ]; then
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findFile $patchdir/patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH} || break
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applyPatch patch-${CURRENTFULLVERSION}-ac${HIGHESTPATCH}
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else
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echo "No -ac patches found"
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fi
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else
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# They want an exact version
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findFile $patchdir/patch-${CURRENTFULLVERSION}${gotac} || {
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echo "Sorry, I couldn't find the $gotac patch for $CURRENTFULLVERSION. Hohum."
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exit 1
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}
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applyPatch patch-${CURRENTFULLVERSION}${gotac}
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fi
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fi
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