--- /dev/null
+#!/bin/bash
+#
+# Copyright (C) 2013 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+### Usage: generate_uapi_headers.sh [<options>]
+###
+### This script is used to get a copy of the uapi kernel headers
+### from an android kernel tree and copies them into an android source
+### tree without any processing. The script also creates all of the
+### generated headers and copies them into the android source tree.
+###
+### Options:
+### --skip-generation
+### Skip the step that generates all of the include files.
+### --download-kernel
+### Automatically create a temporary git repository and check out the
+### Android kernel source code.
+### --use-kernel-dir <DIR>
+### Do not check out the kernel source, use the kernel directory
+### pointed to by <DIR>.
+
+# Terminate the script if any command fails.
+set -eE
+
+TMPDIR=""
+ANDROID_DIR=""
+KERNEL_VERSION="android-3.10"
+KERNEL_DIR=""
+KERNEL_DOWNLOAD=0
+ARCH_LIST=("arm" "arm64" "mips" "x86")
+ANDROID_KERNEL_DIR="external/kernel-headers/original"
+SKIP_GENERATION=0
+
+function cleanup () {
+ if [[ "${TMPDIR}" =~ /tmp ]] && [[ -d "${TMPDIR}" ]]; then
+ echo "Removing temporary directory ${TMPDIR}"
+ rm -rf "${TMPDIR}"
+ TMPDIR=""
+ fi
+}
+
+function usage () {
+ grep '^###' $0 | sed -e 's/^###//'
+}
+
+function copy_hdrs () {
+ local src_dir=$1
+ local tgt_dir=$2
+ local dont_copy_dirs=$3
+
+ mkdir -p ${tgt_dir}
+
+ local search_dirs=()
+
+ # This only works if none of the filenames have spaces.
+ for file in $(ls -d ${src_dir}/* 2> /dev/null); do
+ if [[ -d "${file}" ]]; then
+ search_dirs+=("${file}")
+ elif [[ -f "${file}" ]] && [[ "${file}" =~ .h$ ]]; then
+ cp ${file} ${tgt_dir}
+ fi
+ done
+
+ if [[ "${dont_copy_dirs}" == "" ]]; then
+ for dir in "${search_dirs[@]}"; do
+ copy_hdrs "${dir}" ${tgt_dir}/$(basename ${dir})
+ done
+ fi
+}
+
+trap cleanup EXIT
+# This automatically triggers a call to cleanup.
+trap "exit 1" HUP INT TERM TSTP
+
+while [ $# -gt 0 ]; do
+ case "$1" in
+ "--skip-generation")
+ SKIP_GENERATION=1
+ ;;
+ "--download-kernel")
+ KERNEL_DOWNLOAD=1
+ ;;
+ "--use-kernel-dir")
+ if [[ $# -lt 2 ]]; then
+ echo "--use-kernel-dir requires an argument."
+ exit 1
+ fi
+ shift
+ KERNEL_DIR="$1"
+ KERNEL_DOWNLOAD=0
+ ;;
+ "-h" | "--help")
+ usage
+ exit 1
+ ;;
+ "-"*)
+ echo "Error: Unrecognized option $1"
+ usage
+ exit 1
+ ;;
+ *)
+ echo "Error: Extra arguments on the command-line."
+ usage
+ exit 1
+ ;;
+ esac
+ shift
+done
+
+ANDROID_KERNEL_DIR="${ANDROID_BUILD_TOP}/${ANDROID_KERNEL_DIR}"
+if [[ "${ANDROID_BUILD_TOP}" == "" ]]; then
+ echo "ANDROID_BUILD_TOP is not set, did you run lunch?"
+ exit 1
+elif [[ ! -d "${ANDROID_KERNEL_DIR}" ]]; then
+ echo "${ANDROID_BUILD_TOP} doesn't appear to be the root of an android tree."
+ echo " ${ANDROID_KERNEL_DIR} is not a directory."
+ exit 1
+fi
+
+if [[ ${KERNEL_DOWNLOAD} -eq 1 ]]; then
+ TMPDIR=$(mktemp -d /tmp/android_kernelXXXXXXXX)
+ cd "${TMPDIR}"
+ echo "Fetching android kernel source ${KERNEL_VERSION}"
+ git clone https://android.googlesource.com/kernel/common.git
+ cd common
+ git checkout "${KERNEL_VERSION}"
+ KERNEL_DIR="${TMPDIR}"
+elif [[ "${KERNEL_DIR}" == "" ]]; then
+ echo "Must specify one of --use-kernel-dir or --download-kernel."
+ exit 1
+elif [[ ! -d "${KERNEL_DIR}" ]] || [[ ! -d "${KERNEL_DIR}/common" ]]; then
+ echo "The kernel directory $KERNEL_DIR or $KERNEL_DIR/common does not exist."
+ exit 1
+else
+ cd "${KERNEL_DIR}/common"
+fi
+
+if [[ ${SKIP_GENERATION} -eq 0 ]]; then
+ # Build all of the generated headers.
+ for arch in "${ARCH_LIST[@]}"; do
+ echo "Generating headers for arch ${arch}"
+ make ARCH=${arch} headers_install
+ done
+fi
+
+# Copy all of the include/uapi files to the kernel headers uapi directory.
+copy_hdrs "${KERNEL_DIR}/common/include/uapi" "${ANDROID_KERNEL_DIR}/uapi"
+
+copy_hdrs "${KERNEL_DIR}/common/drivers/staging/android/uapi" \
+ "${ANDROID_KERNEL_DIR}/uapi/linux" "no-copy-dirs"
+
+copy_hdrs "${KERNEL_DIR}/common/include/generated/uapi" \
+ "${ANDROID_KERNEL_DIR}/uapi"
+
+for arch in "${ARCH_LIST[@]}"; do
+ if [[ "$arch" == "arm64" ]]; then
+ # The Android headers use aarch64 as the name of the 64 bit arm headers.
+ tgt_arch="asm-aarch64"
+ else
+ tgt_arch="asm-${arch}"
+ fi
+ # Copy arch headers first.
+ copy_hdrs "${KERNEL_DIR}/common/arch/${arch}/include/uapi" \
+ "${ANDROID_KERNEL_DIR}/uapi/${tgt_arch}"
+ # Copy the generated arch header files.
+ copy_hdrs "${KERNEL_DIR}/common/arch/${arch}/include/generated/uapi" \
+ "${ANDROID_KERNEL_DIR}/uapi/${tgt_arch}"
+done