#!/bin/sh

#

#   ti processor sdk linux am335x evm /bin/setup-targetfs-nfs.sh hacking

# 说明：

#     本文主要对TI的sdk中的setup-targetfs-nfs.sh脚本进行解读，是为了了解

# 其工作机制。

#

#                                      -- 深圳 南山平山村 曾剑锋

# This distribution contains contributions or derivatives under copyright

# as follows:

#

# Copyright (c) , Texas Instruments Incorporated

# All rights reserved.

#

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# 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

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# - 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.

#

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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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cwd=`dirname $`

. $cwd/common.sh

#

# #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.-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=

# TI_SDK_PATH=/home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00

SDKinstall=`grep TI_SDK_PATH= $cwd/../Rules.make | cut -d= -f2`

# dstdefault=/home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00/targetNFS

dstdefault=$SDKinstall/targetNFS

echo "--------------------------------------------------------------------------------"

# 配置NFS目录

echo "In which directory do you want to install the target filesystem?(if this directory does not exist it will be created)"

read -p "[ $dstdefault ] " dst

if [ ! -n "$dst" ]; then

    dst=$dstdefault

fi

echo "--------------------------------------------------------------------------------"

echo

echo "--------------------------------------------------------------------------------"

echo "This step will extract the target filesystem to $dst"

echo

# 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

extract_fs() {

    # 文件系统的tar包位置

    fstar=`ls - $cwd/../filesystem/??sdk*rootfs*.tar.gz`

    me=`whoami`                     # 获取用户名

    sudo mkdir -p $                # 创建指定目录

    check_status

    sudo tar xzf $fstar -C $       # 将文件系统解压到指定的目录

    check_status

    sudo chown $me:$me $           # 改变指定目录的用户和群组

    check_status

    sudo chown -R $me:$me $/home $/usr $/etc $/lib $/boot  # 改变指定目录下的属性

    check_status

    # Opt isn't a standard Linux directory. First make sure it exist.

    if [ -d $/opt ];

    then

            sudo chown -R $me:$me $/opt

            check_status

    fi

    echo

    # 显示提取文件成功

    echo "Successfully extracted `basename $fstar` to $1"

}

# 检查目录是否存在，根据是否存在做对应的事：备份、拷贝等。

if [ -d $dst ]; then

    echo "$dst already exists"

    echo "(r) rename existing filesystem (o) overwrite existing filesystem (s) skip filesystem extraction"

    read -p "[r] " exists

    case "$exists" in

      s) echo "Skipping filesystem extraction"

         echo "WARNING! Keeping the previous filesystem may cause compatibility problems if you are upgrading the SDK"

         ;;

      o) sudo rm -rf $dst

         echo "Old $dst removed"

         extract_fs $dst

         ;;

      *) dte="`date +%m%d%Y`_`date +%H`.`date +%M`"

         echo "Path for old filesystem:"

         read -p "[ $dst.$dte ]" old

         if [ ! -n "$old" ]; then

             old="$dst.$dte"

         fi

         sudo mv $dst $old

         check_status

         echo

         echo "Successfully moved old $dst to $old"

         extract_fs $dst

         ;;

    esac

else

    extract_fs $dst

fi

# . 查看

#     Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ ls -al

#     total

#     -rwxr-xr-x   Qt   Qt         Aug    Rules.make

#     -rwxr-xr-x   Qt   Qt         Apr    setup.sh

#     -rw-rw-r--   Qt   Qt           Aug    .gdbinit

#     -rw-rw-r--   Qt   Qt           Aug    .targetfs

#     drwxr-xr-x  root root       Aug    targetNFS

#     Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ cat .targetfs

#     /home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00/targetNFS

#     Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$

#     Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ cat .gdbinit

#     set sysroot /home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00/targetNFS

# . 如上可知，.targetfs确实生成了。

echo $dst > $cwd/../.targetfs

echo "set sysroot $dst" > $cwd/../.gdbinit

echo "--------------------------------------------------------------------------------"

# platform=am335x-evm

platform=`grep PLATFORM= $cwd/../Rules.make | cut -d= -f2`

echo

echo "--------------------------------------------------------------------------------"

echo "This step will set up the SDK to install binaries in to:"

echo "    $dst/home/root/$platform"

echo

echo "The files will be available from /home/root/$platform on the target."

echo

echo "This setting can be changed later by editing Rules.make and changing the"

echo "EXEC_DIR or DESTDIR variable (depending on your SDK)."

echo

read -p "Press return to continue" REPLY

sed -i "s=EXEC_DIR\=.*$=EXEC_DIR\=$dst/home/root/$platform=g" $cwd/../Rules.make

check_status

#  DESTDIR=/home/Qt/ti-processor-sdk-linux-am335x-evm-01.00.00.00/targetNFS

sed -i "s=DESTDIR\=.*$=DESTDIR\=$dst=g" $cwd/../Rules.make

check_status

echo "Rules.make edited successfully.."

echo "--------------------------------------------------------------------------------"

echo

echo "--------------------------------------------------------------------------------"

echo "This step will export your target filesystem for NFS access."

echo

echo "Note! This command requires you to have administrator priviliges (sudo access) "

echo "on your host."

read -p "Press return to continue" REPLY

# 检查NFS的路径是否已经设置了，如果设置了，那么就调过，如果没有设置，那么重新设置。

grep $dst /etc/exports > /dev/null

if [ "$?" -eq "" ]; then

    echo "$dst already NFS exported, skipping.."

else

    sudo chmod  /etc/exports

    check_status

    sudo echo "$dst *(rw,nohide,insecure,no_subtree_check,async,no_root_squash)" >> /etc/exports

    check_status

    sudo chmod  /etc/exports

    check_status

fi

echo

sudo /etc/init.d/nfs-kernel-server stop     # 关闭nfs服务器

check_status

sleep

sudo /etc/init.d/nfs-kernel-server start    # 打开nfs服务为，是配置有效

check_status

echo "--------------------------------------------------------------------------------"