kernelpatch_ubuntu

#!/bin/bash

# Define where to build and from what dir to build

    BUILD_DIR="/lib/modules/`uname -r`/build"
    TEMPDIR="tmp"

die(){
    echo $1
    exit 1
}

confirmyes(){
    # call with a prompt string or use a default
    read -r -p "${1:-Are you sure? [Y/n]} " response
    case $response in
        [yY][eE][sS]|[yY]) 
            true
            ;;
        [nN][oO]|[nN])
            false
            ;;
        *)
            true
            ;;
    esac
}

confirmno(){
    # call with a prompt string or use a default
    read -r -p "${1:-Are you sure? [y/N]} " response
    case $response in
        [yY][eE][sS]|[yY]) 
            true
            ;;
        *)
            false
            ;;
    esac
}

success(){
depmod -a
echo -en "

####################################################################
\E[1;33;44mYour kernel is properly patched. You should reboot your machine now.\E[0m
####################################################################
"
cd ../.. && rm -rf $TEMPDIR
}

fail(){
echo -en "
##########################################################
\E[1;33;44mError(s) encountered. Your kernel is NOT properly patched.\E[0m
##########################################################
"
cd ../.. && rm -rf $TEMPDIR
exit 1
}

# Get OS and release info

if [ -f /usr/bin/lsb_release ]; then
    OS=$( lsb_release -si )
    RELEASE=$( lsb_release -sc )
fi

if [ "$OS" = "Ubuntu" ]; then

# Make sure that we are running as root

  if ! echo "$(whoami)" | grep "root" > /dev/null 2>&1; then
    echo -en "
\E[1;33;44m
You should run as root.

Do \"sudo su\" and run me again.

Aborting...
\E[0m
"
    make clean > /dev/null 2>&1
    exit 0
  fi

# Get kernel version numbers

    SHORT_KERNEL="$( echo `uname -r` | grep -o '[[:digit:]]\+\.[[:digit:]]\+' )"
    FIRST_DIGIT="$( echo `uname -r` | grep -o '[[:digit:]]\+' | head -n1 )"
    SECOND_DIGIT="$( echo `uname -r` | grep -o '[[:digit:]]\+' | head -n2 | awk 'NR==2' )"
    PATCHLEVEL="$( echo `uname -r` | grep -o '[[:digit:]]\+' | head -n3 | awk 'NR==3' )"
    UBUNTU_KERNEL="$SHORT_KERNEL.0"

# Abort if running kernel is < 3.x

  if [ "$FIRST_DIGIT" -lt 3 ]; then
    echo -en "
\E[1;33;44m
The kernel you are running is not supported anymore.

Minimum supported version is 3.x

Aborting...
\E[0m
"
    exit 1
  fi

  if test "x$GCC" = "x"; then
    GCC=gcc
  fi

# When using FFdecsawrapper, the kernel has to be patched.
# Let's do it.

  echo -en "
FFdecsawrapper needs a patched dvb-core.ko kernel module.

If you are running a \E[1;33;44m!UNMODIFIED!\E[0m Debian/Ubuntu kernel
I can do that for you if your sources.list is ok and the source
for your kernel is available from the repo's.

This will (re)install the source for your running kernel
along with any missing build deps.
Having done that, your running Debian/Ubuntu kernel
will be patched for use with ffdecsawrapper.

\E[1;33;44mIf you recompiled a stock kernel, you should\E[0m
\E[1;33;44mhave patched it. So answer 'No' in that case\E[0m

"

  confirmyes "Do you want me to patch your running Debian/Ubuntu kernel?[Y/n]"

# Install dependencies for patching the kernel

  if [ "$?" -eq 0 ]; then
    apt-get build-dep linux --no-install-recommends -y || die "Error installing \"build-dep linux\""
    rm -rf $TEMPDIR && mkdir $TEMPDIR && cd $TEMPDIR &&   apt-get source linux -y || die "Error(s) while fetching Debian Linux source"
    cd linux-*
    CWD=$(pwd)
    if  [ "$FIRST_DIGIT" -eq 3 ]; then
      if [ "$SECOND_DIGIT" -lt 7 ]; then
        patch -p0 < ../../linux-3.0-dvb-mutex.patch
        if ! [ "$?" -eq 0 ]; then
          fail
        fi
        CC="$GCC" make -C $BUILD_DIR M=$CWD/drivers/media/dvb/dvb-core modules
        mkdir -p /lib/modules/`uname -r`/updates/ffdecsawrapper > /dev/null 2>&1
        /usr/bin/install $CWD/drivers/media/dvb/dvb-core/dvb-core.ko /lib/modules/`uname -r`/updates/ffdecsawrapper
        if [ "$?" -eq 0 ]; then
          success
        else
          fail
        fi
      elif [ "$SECOND_DIGIT" -lt 13 ]; then
        patch -p0 < ../../linux-3.7-dvb-mutex.patch
        if ! [ "$?" -eq 0 ]; then
          fail
        fi
        CC="$GCC" make -C $BUILD_DIR M=$CWD/drivers/media/dvb-core modules
        mkdir -p /lib/modules/`uname -r`/updates/ffdecsawrapper > /dev/null 2>&1
        /usr/bin/install $CWD/drivers/media/dvb-core/dvb-core.ko /lib/modules/`uname -r`/updates/ffdecsawrapper
        if [ "$?" -eq 0 ]; then
          success
        else
          fail
        fi
      else
        patch -p0 < ../../linux-3.13-dvb-mutex.patch
        if ! [ "$?" -eq 0 ]; then
          fail
        fi
        CC="$GCC" make -C $BUILD_DIR M=$CWD/drivers/media/dvb-core modules
        mkdir -p /lib/modules/`uname -r`/updates/ffdecsawrapper > /dev/null 2>&1
        /usr/bin/install $CWD/drivers/media/dvb-core/dvb-core.ko /lib/modules/`uname -r`/updates/ffdecsawrapper
        if [ "$?" -eq 0 ]; then
          success
        else
          fail
        fi
      fi
    else
      patch -p0 < ../../linux-3.13-dvb-mutex.patch
      if ! [ "$?" -eq 0 ]; then
        fail
      fi
      CC="$GCC" make -C $BUILD_DIR M=$CWD/drivers/media/dvb-core modules
      mkdir -p /lib/modules/`uname -r`/updates/ffdecsawrapper > /dev/null 2>&1
      /usr/bin/install $CWD/drivers/media/dvb-core/dvb-core.ko /lib/modules/`uname -r`/updates/ffdecsawrapper
      if [ "$?" -eq 0 ]; then
        success
      else
        fail
      fi
    fi
  else
    echo "
Not patching any kernel.
"
  fi
fi