Add first-cut Linux kernel patch-in mechanism

[yaffs/.git] / linux-kernel / patch-ker.sh

diff --git a/linux-kernel/patch-ker.sh b/linux-kernel/patch-ker.sh
new file mode 100755 (executable)
index 0000000..0db4cae
--- /dev/null
+++ b/linux-kernel/patch-ker.sh
@@ -0,0 +1,99 @@
+#!/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=0
+PATCHLEVEL=0
+SUBLEVEL=0
+LINUXDIR=$1
+
+# To be a Linux directory, it must have a Makefile
+
+
+# Display usage of this script
+usage () {
+       echo "usage:  $0  kernelpath"
+       exit 1
+}
+
+
+
+if [ -z $LINUXDIR ]
+then
+    usage;
+fi
+
+# Check if kerneldir contains a Makefile
+if [ ! -f $LINUXDIR/Makefile ] 
+then 
+       echo "Directory $LINUXDIR does not exist or is not a kernel source directory";
+       exit 1;
+fi
+
+# Get kernel version
+VERSION=`grep -s VERSION <$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.$SUBLEVEL, must be 2.6.x or higher"
+       exit 1;
+fi
+
+
+KCONFIG=$LINUXDIR/fs/Kconfig
+KCONFIGOLD=$LINUXDIR/fs/Kconfig.pre.yaffs
+YAFFS_PATCHED_STRING=`grep -s yaffs <$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" $KCONFIGOLD >>$KCONFIG
+
+fi    
+
+
+YAFFSDIR=$LINUXDIR/fs/yaffs
+
+if [ -e $YAFFSDIR ]
+then
+   echo "$YAFFSDIR exists, not patching"
+else
+    ln -fs `pwd`/fs/yaffs $LINUXDIR/fs/yaffs
+fi
+