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#! /bin/sh

# Script to apply kernel patches.

#   usage: patch-kernel [ sourcedir [ patchdir ] ]

#     The source directory defaults to /usr/src/linux, and the patch

#     directory defaults to the current directory.

#

# 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 , 2nd January 1995.

# Set directories from arguments, or use defaults.

sourcedir=${1-/usr/src/linux}

patchdir=${2-.}

# set current VERSION, PATCHLEVEL, SUBLEVEL

eval `sed -n 's/^\([A-Z]*\) = \([0-9]*\)$/\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"

while :

do

    SUBLEVEL=`expr $SUBLEVEL + 1`

    patch=patch-$VERSION.$PATCHLEVEL.$SUBLEVEL.gz

    if [ ! -r $patchdir/$patch ]

    then

        break

    fi

    echo -n "Applying $patch... "

    if gunzip -dc $patchdir/$patch | patch -p1 -s -N -E -d $sourcedir

    then

        echo "done."

    else

        echo "failed.  Clean up yourself."

        break

    fi

    if [ "`find $sourcedir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ]

    then

        echo "Aborting.  Reject files found."

        break

    fi

    # Remove backup files

    find $sourcedir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;

done