#!/bin/sh## YAFFS: Yet another FFS. A NAND-flash specific file system.## Copyright (C) 2002 Aleph One Ltd.# # Created by Charles Manning <charles@aleph1.co.uk># # This program is free software; you can redistribute it and/or modify# it under the terms of the GNU General Public License version 2 as# published by the Free Software Foundation.## Patch YAFFS into the kernel##  args:  kpath  : Full path to kernel sources to be patched##  Somewhat "inspired by" the mtd patchin script##  $Id: patch-ker.sh,v 1.1 2005/04/06 01:03:46 charles Exp $VERSION=0PATCHLEVEL=0SUBLEVEL=0LINUXDIR=$1# To be a Linux directory, it must have a Makefile# Display usage of this scriptusage () {	echo "usage:  $0  kernelpath"	exit 1}if [ -z $LINUXDIR ]then    usage;fi# Check if kerneldir contains a Makefileif [ ! -f $LINUXDIR/Makefile ] then 	echo "Directory $LINUXDIR does not exist or is not a kernel source directory";	exit 1;fi# Get kernel versionVERSION=`grep -s VERSION <$LINUXDIR/Makefile | head -n 1 | sed s/'VERSION = '//`PATCHLEVEL=`grep -s PATCHLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'PATCHLEVEL = '//`SUBLEVEL=`grep -s SUBLEVEL <$LINUXDIR/Makefile | head -n 1 | sed s/'SUBLEVEL = '//`# Can we handle this version?if [ $VERSION -ne 2  -o $PATCHLEVEL -lt 6  ]then 	echo "Cannot patch kernel version $VERSION.$PATCHLEVEL.$SUBLEVEL, must be 2.6.x or higher"	exit 1;fiKCONFIG=$LINUXDIR/fs/KconfigKCONFIGOLD=$LINUXDIR/fs/Kconfig.pre.yaffsYAFFS_PATCHED_STRING=`grep -s yaffs <$KCONFIG | head -n 1`if [ ! -z "$YAFFS_PATCHED_STRING" ]then    YAFFS_PATCHED=0    echo "$KCONFIG already mentions YAFFS, so we will not change it"else   # Change the fs/Kconfig file   # Save the old Kconfig   # Copy all stuff up to JFFS   # Insert some YAFFS stuff   # Copy all the rest of the stuff    YAFFS_PATCHED=1    echo "Updating $KCONFIG"    mv -f $KCONFIG  $KCONFIGOLD    sed -n -e "/JFFS/,99999 ! p" $KCONFIGOLD >$KCONFIG    echo "">>$KCONFIG    echo "# Patched by YAFFS" >>$KCONFIG    echo "source \"fs/yaffs/Kconfig\"">>$KCONFIG    echo "">>$KCONFIG    sed -n -e "/JFFS/,99999 p" $KCONFIGOLD >>$KCONFIGfi    YAFFSDIR=$LINUXDIR/fs/yaffsif [ -e $YAFFSDIR ]then   echo "$YAFFSDIR exists, not patching"else    ln -fs `pwd`/fs/yaffs $LINUXDIR/fs/yaffsfi