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Subject-ac option for scripts/patch-kernel
Hi,
Please find attached a replacement for linux/scripts/patch-kernel
(The diff was larger than the file)

It adds a -ac option, so you can do

patch-kernel . .. 2.4.9 -ac

For example on a 2.4.x source tree and upgrade it to 2.4.9 and apply the
latest ac patch in the patch directory.

or

patch-kernel . .. 2.4.9 -ac14

To use the -ac14 patch instead of the latest

or

patch-kernel . .. -ac

To upgrade to the latest Linus kernel and then apply the latest -ac patch
for it.

I've given it a reasonably heavy test, but would welcome suggestions/comments.

One known issue is that:

patch-kernel . .. -ac 2.4.9

Is invalid and is not warned about (the base kernel version must be $3)

I also fixed a case where the stop version was checked too late.

Enjoy,

Dave

---------------- Have a happy GNU millennium! ----------------------
/ Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \
\ gro.gilbert @ treblig.org | MIPS,x86,ARM, SPARC and HP-PA | In Hex /
\ _________________________|_____ http://www.treblig.org |_______/
#! /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 options
for 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 it
function 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 extension

function 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, EXTERVERSION
eval `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 1
fi

echo "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;
fi

while :
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 || break
done

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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