#!/bin/sh
#
# ti processor sdk linux am335x evm /bin/setup-tftp.sh hacking
# 说明：
# 本文主要对TI的sdk中的setup-tftp.sh脚本进行解读，是为了了解其工作机制。
#
# 2016-4-16 深圳 南山平山村 曾剑锋
# This distribution contains contributions or derivatives under copyright
# as follows:
#
# Copyright (c) 2010, Texas Instruments Incorporated
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# - Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# - Neither the name of Texas Instruments nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# 获取当前工作路径，并执行common.sh，是为了使用里面的函数
cwd=`dirname $0`
. $cwd/common.sh
# tftp配置文件路径
tftpcfg=/etc/xinetd.d/tftp
# tftp根目录路径
tftprootdefault=/tftpboot
# 创建tftpcfg文件，并将设定好的配置放入里面；
tftp() {
echo "
service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = $tftproot
disable = no
}
" | sudo tee $tftpcfg > /dev/null
check_status
echo
echo "$tftpcfg successfully created"
}
echo "--------------------------------------------------------------------------------"
echo "Which directory do you want to be your tftp root directory?(if this directory does not exist it will be created for you)"
# 采用默认的tftproot还是自定义路径，有这部分决定。
read -p "[ $tftprootdefault ] " tftproot
if [ ! -n "$tftproot" ]; then
tftproot=$tftprootdefault
fi
#
# 1. 查看结果：
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ls -al
# total 294792
# ......
# -rw-rw-r-- 1 Qt Qt 10 Aug 14 2015 .tftproot
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ cat .tftproot
# /tftpboot
# 2. 由上面可知，确实生成了.tftproot文件，里面确实也是/tftpboot
echo $tftproot > $cwd/../.tftproot
echo "--------------------------------------------------------------------------------"
echo
echo "--------------------------------------------------------------------------------"
echo "This step will set up the tftp server in the $tftproot directory."
echo
# 接下来需要设定tftp服务器，需要root权限。
echo "Note! This command requires you to have administrator priviliges (sudo access) "
echo "on your host."
read -p "Press return to continue" REPLY
# 查看目录是否存在，如果存在，那么不用创建，如果不存在，那么就创建。
if [ -d $tftproot ]; then
echo
echo "$tftproot already exists, not creating.."
else
sudo mkdir -p $tftproot
check_status
sudo chmod 777 $tftproot
check_status
sudo chown nobody $tftproot
check_status
fi
#
# #platform
# PLATFORM=am335x-evm
# #defconfig
# DEFCONFIG=singlecore-omap2plus_defconfig
# #Architecture
# ARCH=armv7-a
# #u-boot machine
# UBOOT_MACHINE=am335x_evm_config
# #Points to the root of the TI SDK
# export TI_SDK_PATH=/home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00
# #root of the target file system for installing applications
# DESTDIR=/home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00/targetNFS
# #Points to the root of the Linux libraries and headers matching the
# #demo file system.
# export LINUX_DEVKIT_PATH=$(TI_SDK_PATH)/linux-devkit
# #Cross compiler prefix
# export CROSS_COMPILE=$(LINUX_DEVKIT_PATH)/sysroots/i686-arago-linux/usr/bin/arm-linux-gnueabihf-
# #Default CC value to be used when cross compiling. This is so that the
# #GNU Make default of "cc" is not used to point to the host compiler
# export CC=$(CROSS_COMPILE)gcc
# #Location of environment-setup file
# export ENV_SETUP=$(LINUX_DEVKIT_PATH)/environment-setup
# #The directory that points to the SDK kernel source tree
# LINUXKERNEL_INSTALL_DIR=$(TI_SDK_PATH)/board-support/linux-3.14.26-g2489c02
# CFLAGS= -march=armv7-a -marm -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a8
# SDK_PATH_TARGET=$(TI_SDK_PATH)/linux-devkit/sysroots/cortexa8t2hf-vfp-neon-linux-gnueabi/
# MAKE_JOBS=4
#
platform=`cat $cwd/../Rules.make | grep -e "^PLATFORM=" | cut -d= -f2`
kernelimage="zImage-""$platform"".bin"
# 之前编译好的文件
kernelimagesrc=`ls -1 $cwd/../board-support/prebuilt-images/$kernelimage`
# 如果tftp根目录下存在了对应的内核文件
if [ -f $tftproot/$kernelimage ]; then
echo
echo "$tftproot/$kernelimage already exists. The existing installed file can be renamed and saved under the new name."
# 由用户决定是使用哪种方式，重命名还是重写。
echo "(r) rename (o) overwrite (s) skip copy "
read -p "[r] " exists
case "$exists" in
s) echo "Skipping copy of $kernelimage, existing version will be used"
;;
o) sudo cp $kernelimagesrc $tftproot
check_status
echo
echo "Successfully overwritten $kernelimage in tftp root directory $tftproot"
;;
*) dte="`date +%m%d%Y`_`date +%H`.`date +%M`"
echo "New name for existing kernelimage: "
# 默认用kernelimage名加上日期来代表老版本的文件名
read -p "[ $kernelimage.$dte ]" newname
if [ ! -n "$newname" ]; then
newname="$kernelimage.$dte"
fi
sudo mv "$tftproot/$kernelimage" "$tftproot/$newname"
check_status
sudo cp $kernelimagesrc $tftproot
check_status
echo
echo "Successfully copied $kernelimage to tftp root directory $tftproot as $newname"
;;
esac
else
# 当然如果文件本身就不存在，那么直接cp就行了。
sudo cp $kernelimagesrc $tftproot
check_status
echo
echo "Successfully copied $kernelimage to tftp root directory $tftproot"
fi
dtbfiles=`cd $cwd/../board-support/prebuilt-images/;ls -1 *.dtb`
prebuiltimagesdir=`cd $cwd/../board-support/prebuilt-images/ ; echo $PWD`
# 这里跟前面的kernel操作差不多。
for dtbfile in $dtbfiles
do
if [ -f $tftproot/$dtbfile ]; then
echo
echo "$tftproot/$dtbfile already exists. The existing installed file can be renamed and saved under the new name."
echo "(o) overwrite (s) skip copy "
read -p "[o] " exists
case "$exists" in
s) echo "Skipping copy of $dtbfile, existing version will be used"
;;
*) sudo cp "$prebuiltimagesdir/$dtbfile" $tftproot
check_status
echo
echo "Successfully overwritten $$dtbfile in tftp root directory $tftproot"
;;
esac
else
sudo cp "$prebuiltimagesdir/$dtbfile" $tftproot
check_status
echo
echo "Successfully copied $dtbfile to tftp root directory $tftproot"
fi
done
echo
# 如果tftpcfg文件已经存在，需要查看tftp配置中的tftp根目录是否在我们需要的位置，
# 如果不在，那么还是需要另外配置。
if [ -f $tftpcfg ]; then
echo "$tftpcfg already exists.."
#Use = instead of == for POSIX and dash shell compliance
if [ "`cat $tftpcfg | grep server_args | cut -d= -f2 | sed 's/^[ ]*//'`" \
= "$tftproot" ]; then
echo "$tftproot already exported for TFTP, skipping.."
else
echo "Copying old $tftpcfg to $tftpcfg.old"
sudo cp $tftpcfg $tftpcfg.old
check_status
tftp
fi
else
# 如果tftpcfg文件不存在，那么就创建tftp配置文件。
tftp
fi
echo
echo "Restarting tftp server"
sudo /etc/init.d/xinetd stop # stop tftp服务
check_status
sleep 1
sudo /etc/init.d/xinetd start # start tftp服务使tftpcfg有效。
check_status
echo "--------------------------------------------------------------------------------"
