From 9c8f2901403eb3c2e1ace23dbfd6490cd074ca61 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Mon, 15 Feb 2010 17:34:22 +0000
Subject: [PATCH] Added to repository.

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1509 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scripts/generate-patched-kernel | 117 ++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100755 scripts/generate-patched-kernel

diff --git a/scripts/generate-patched-kernel b/scripts/generate-patched-kernel
new file mode 100755
index 000000000..77e3f54cf
--- /dev/null
+++ b/scripts/generate-patched-kernel
@@ -0,0 +1,117 @@
+#!/bin/bash
+
+############################################################################
+#
+# Script for generating a kernel source tree with the SCST patches applied.
+#
+# Copyright (C) 2010 Bart Van Assche <bart.vanassche@gmail.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation, version 2
+# of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+############################################################################
+
+
+########################
+# Function definitions #
+########################
+
+function usage {
+  echo "Usage: $0 <kernel version>"
+}
+
+# First three components of the kernel version number.
+function kernel_version {
+  echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\.[0-9]*\).*$/\1/p'
+}
+
+# Last component of the kernel version, or the empty string if $1 has only
+# three components.
+function patchlevel {
+  echo "$1" | sed -n 's/^\([0-9]*\.[0-9]*\.[0-9]*\)[.-]\(.*\)$/\2/p'
+}
+
+# Download the file from URL $1 and save it in the current directory.
+function download_file {
+  if [ ! -e "$(basename "$1")" ]; then
+    if [ "${quiet_download}" = "false" ]; then
+      echo "Downloading $1 ..."
+    fi
+    if ! wget -q -nc "$1"; then
+      echo "Downloading $1 failed."
+      return 1
+    fi
+  fi
+}
+
+# Make sure the kernel tarball and patch file are present in directory
+# ${kernel_sources}. Download any missing files from ${kernel_mirror}.
+function download_kernel {
+  local kver="$(kernel_version $1)"
+  local plevel="$(patchlevel $1)"
+
+  mkdir -p "${kernel_sources}" || return $?
+  test -w "${kernel_sources}" || return $?
+  (
+    cd "${kernel_sources}" || return $?
+    download_file "${kernel_mirror}/linux-$(kernel_version $1).tar.bz2" \
+      || return $?
+    if [ "${plevel}" != "" ]; then
+      download_file "${kernel_mirror}/patch-$1.bz2" || return $?
+    fi
+  )
+}
+
+
+#########################
+# Argument verification #
+#########################
+
+set -e
+
+if [ "$1" = "" ]; then
+  echo "Error: missing kernel version argument."
+  exit 1
+fi
+
+
+##########################
+# Kernel tree generation #
+##########################
+
+kernel_mirror="ftp://ftp.eu.kernel.org/pub/linux/kernel/v2.6"
+kernel_sources="$HOME/software/downloads"
+
+target="linux-$1"
+kernel_version="$(kernel_version "$1")"
+patchlevel="$(patchlevel "$1")"
+
+download_kernel "$1"
+
+mkdir "${target}" || exit $?
+cd "${target}" || exit $?
+
+tar --strip-components=1 -xjf "${kernel_sources}/linux-${kernel_version}.tar.bz2"
+
+echo "==== ${kernel_sources}/patch-$1.bz2"
+bzip2 -cd < "${kernel_sources}/patch-$1.bz2" | patch -s -p1
+
+# Note: the command below will only work correctly when $0 is an absolute
+# directory, i.e. starts with a slash.
+svn status -v "$(dirname $(dirname $0))" \
+| grep -v '^Performing' \
+| cut -c41- \
+| grep -- "-${kernel_version}.*.patch$" \
+| grep -v /in-tree/ \
+| while read p
+  do
+    echo "==== $p"
+    patch -p1 <$p
+  done