#!/bin/sh

KERNELDIR=/lib/modules/$(uname -r)/build
PREPARSER="./preparser"
UNIQUE=false
VERBOSE=false
NOTEST=true
DODIFF=false
DIFFREV=false
ALLOW_ANY_DIR=true

docp() {

    SRCNAME=$1;
    if $VERBOSE; then
	echo -n "$SRCNAME... "
    fi

    # special cases
    
    TMPNAME=/tmp/`basename $1`.$$
    
    # Makefiles
    BASENAME=`basename $2`; 
    if [ "$BASENAME" = "Makefile" ]; then
	if [ $VERSION -gt 3 -o \( $VERSION -eq 2 -a $PATCHLEVEL -gt 3 \) ]; then
	    sed -e "s/drivers\/isdn\/Rules\.make/Rules\.make/" < $SRCNAME > $TMPNAME
	    if $VERBOSE ; then
		echo -n "processing... modified..."
	    fi
	    SRCNAME=$TMPNAME
	fi
    fi

    # Rules.make
    if [ "$BASENAME" = "Rules.make" ]; then
	if ! [ $VERSION -gt 3 -o \( $VERSION -eq 2 -a $PATCHLEVEL -gt 3 \) ]; then
	    if $VERBOSE; then
		echo "skipped"
	    fi
	    return
	fi
    fi

    # *.[hc] : preparse if selected
    if $UNIQUE ; then
        if echo $SRCNAME | egrep -q '.[hc]$'; then
	    # only copy isdn_compat.h if we don't have a
	    # delete #include <linux/isdn_compat.h> in the ctrlfile
	    if [ "$1" = "include/linux/isdn_compat.h" ]; then
		if grep -q isdn_compat.h $CTRLNAME; then
		    if $VERBOSE; then
			echo "skipped"
		    fi
		    return
		fi;
	    fi
	    if $VERBOSE; then
		echo -n "processing... "
	    fi
	    $PREPARSER -c $CTRLNAME $SRCNAME $TMPNAME
	    RETVAL=$?
	    if [ $RETVAL -ne 2 -a $RETVAL -ne 0 ] ; then 
		echo "Problem with preparser retval $RETVAL"
		exit 1
	    fi
	    if [ $RETVAL -eq 2 ] ; then
		if $VERBOSE; then
		    echo -n "modified... "
		fi
		SRCNAME=$TMPNAME
	    fi
	fi
    fi

    if $DODIFF; then
	if $VERBOSE; then
	    echo
	fi
	if $DIFFREV; then
	    diff -u $2 $SRCNAME
        else
	    diff -u $SRCNAME $2
	fi
    else
	# do the actual copy, if necessary
	if ! cmp -s $SRCNAME $2 ; then
	    if $VERBOSE; then
		echo "copying"
	    else
		echo "$1... copying"
	    fi
	    if $NOTEST ; then
		    mkdir -p `dirname $2`
		    rm -f $2 # unlink first
		    cp $SRCNAME $2
	    fi
	else
	    if $VERBOSE; then
		echo "up to date"
	    fi
	fi
    fi
	
    if [ -f $TMPNAME ]; then
	rm -f $TMPNAME
    fi
}

#
# Print usage and exit
#
usage() {
	cat<<EOM

	std2kern is used for updating your kernel-tree from within
	this directory.

	std2kern [-h] [-k DIR] [-v] [-u] [-c FILE] [files ...]

	Options:

	-h	This Text.
	-k DIR	Kerneltree is in DIR instead of /usr/src/linux
        -v      More mesages about processing
	-u      preprocessing with $PREPARSER
	-d      don't copy but do a unified diff instead
	-r      reverse directions of diff
	-c FILE	Use FILE as control file for $PREPARSER (only with -u)
	-t      Test, don't really copy files
	-p PREFIX use PREFIX to install mISDNif.h in the system in the path $PREFIX/usr/include/linux

	Without any files given, within the whole tree, the "right"
	files are copied. When any files are given in the commandline,
	only those are copied.

EOM
	exit
}

#
# Check, if argument is a linux kernel dir
#
checkkernel() {
	if [ -f $1/Makefile ] ; then
		if [ "`grep ^vmlinux: $1/Makefile | grep vmlinux`" != "" ] ; then
			return 0
		fi
	fi
	echo "The given argument does not look like a kernel dir"
	if ! $ALLOW_ANY_DIR; then
	    exit 1
	fi
}

#
# Determine a control file name
#
calc_ctrl_file() {
	if [ -z "$CTRLNAME" ] ; then
		CTRLNAME=v$VERSION.$PATCHLEVEL.$SUBLEVEL.ctrl
		if [ -f $CTRLNAME ] ; then
			return 0
		fi
		CTRLNAME=v$VERSION.$PATCHLEVEL.ctrl
		if [ -f $CTRLNAME ] ; then
			return 0
		fi
		CTRLNAME=default.ctrl
	fi
	if [ -f $CTRLNAME ] ; then
		return 0
	fi
	echo "No control file found"
	exit 1
}

#
# Determine a version depend file name
#
calc_version_file() {
	VERSION_NAME=$1.v$VERSION.$PATCHLEVEL.$SUBLEVEL
	if [ -f $VERSION_NAME ] ; then
		return 0
	fi
	VERSION_NAME=$1.v$VERSION.$PATCHLEVEL
	if [ -f $VERSION_NAME ] ; then
		return 0
	fi
	VERSION_NAME=""
	return 1
}

while getopts :p:dhk:uc:vtidr a ; do
	case $a in
		\?)	case $OPTARG in
				k)	echo "-k requires Kernel directory parameter"
					;;
				*)  echo "Unknown option: -$OPTARG"
					echo "Try std2kern -h"
					;;
			esac
			exit 1
			;;
		k)	checkkernel $OPTARG
			KERNELDIR=$OPTARG
			;;
		c)	CTRLNAME=$OPTARG
			;;
		u)	UNIQUE=true
			;;
		v)	VERBOSE=true
			;;
		t)	NOTEST=false
			;;
		i)      ALLOW_ANY_DIR=true;
			;;
		d)      DODIFF=true;
			;;
		r)      DIFFREV=true;
			;;
		p)      PREFIX=$OPTARG;
			;;
		h)	usage
			;;
	esac
done
shift `expr $OPTIND - 1`

echo 
echo "BE AWARE!!"
echo 
echo "You are just attempting to overwrite your Kernel mISDN Sources"
echo "and to install mISDNif.h in your /usr/include/linux directory"
echo "you probably prefer to use make install."
echo
echo "KERNELDIR=$KERNELDIR"
ls -ld $KERNELDIR
echo 
echo "If you still want to patch this Kernel just answer yes:"
read i

if [ ! $i == "yes" ] ; then
	echo "OK exiting"
	exit 1
fi

#copy mISDNif.h to allow userspace apps to compile againt mISDN
echo "Installing mISDNif.h in $PREFIX/usr/include/linux/mISDNif.h"
mkdir -p $PREFIX/usr/include/linux/
cp include/linux/mISDNif.h $PREFIX/usr/include/linux/

if [ -z "$VERSION" -o -z "$PATCHLEVEL" ] ; then
    if ! [ -f $KERNELDIR/Makefile ] ; then
	echo "VERSION/PATCHLEVEL not set and no Makefile to read from"
	exit 1
    fi
    eval `sed -n 's/^\([A-Z]*\) = \([0-9]*\)$/\1=\2/p' $KERNELDIR/Makefile`
fi
echo "Current kernel version is $VERSION.$PATCHLEVEL.$SUBLEVEL"

if $UNIQUE ; then
    calc_ctrl_file
    echo "Controlfile $CTRLNAME"
fi

if [ $# != 0 ]; then
    for i in $* ; do
	docp $i $KERNELDIR/$i
    done
else
    for i in `find drivers -type f -name '*.[hc]'`; do
	docp $i $KERNELDIR/$i
    done
    for i in `find include -type f -name '*.h'`; do
	docp $i $KERNELDIR/$i
    done
    for i in drivers/isdn/hardware/Makefile \
	drivers/isdn/hardware/Kconfig \
	drivers/isdn/hardware/mISDN/Makefile \
	drivers/isdn/hardware/mISDN/Rules.mISDN \
	drivers/isdn/hardware/mISDN/Kconfig \
	drivers/isdn/Config.in \
	drivers/isdn/Makefile; do
	calc_version_file $i 
	if [ -n "$VERSION_NAME" ] ; then
	    docp $VERSION_NAME $KERNELDIR/$i
	else
	    if [ -f $i ] ; then
		echo "use version independ $i for version v$VERSION.$PATCHLEVEL.$SUBLEVEL"
		docp $i $KERNELDIR/$i
	    else
		echo "no $i for version v$VERSION.$PATCHLEVEL.$SUBLEVEL found -- skipped"
	    fi
	fi
    done
#    for i in `find Documentation -type f | grep -v CVS`; do
#	docp $i $KERNELDIR/$i
#    done
fi
exit 0

  if [ -f $KERNELDIR/Documentation/Configure.help ] ; then
    grep -q CONFIG_ISDN_DIVERSION $KERNELDIR/Documentation/Configure.help
    if [ $? != 0 ] ; then
      patch -d $KERNELDIR/Documentation < Documentation/Configure.help.divert.diff
    fi
  fi
  if [ -f $KERNELDIR/Documentation/Configure.help ] ; then
    grep -q CONFIG_ISDN_DRV_EICON $KERNELDIR/Documentation/Configure.help
    if [ $? != 0 ] ; then
      patch -d $KERNELDIR/Documentation < Documentation/Configure.help.eicon.diff
    fi
  fi
  if $NOTEST ; then
    if [ -f $KERNELDIR/Documentation/Configure.help ] ; then
      grep -q CONFIG_ISDN_WITH_ABC $KERNELDIR/Documentation/Configure.help
      if [ $? != 0 ] ; then
	  if [ -f  Documentation/Configure.help.dwabc.diff ] ; then
            patch -d $KERNELDIR/Documentation < Documentation/Configure.help.dwabc.diff
	  fi
      fi
    fi
  fi
fi