ti processor sdk linux am335x evm /bin/create-sdcard.sh hacking

#!/bin/bash

#
#   ti processor sdk linux am335x evm /bin/create-sdcard.sh hacking
# 说明：
#     本文主要对TI的sdk中的create-sdcard.sh脚本进行解读，该文件只解读
# 前面一部分，后面一部分未解读，主要是因为后面的代码并不能获取到正确
# 的设备节点，于是不打算深入解读。其中学会到了tar中显示解压进度的写法，
# 以及拷贝文件夹的显示当前拷贝数据的进度的方法。
#
#                                      2016-4-16 深圳 南山平山村 曾剑锋

# Authors:
#    LT Thomas <ltjr@ti.com>
#    Chase Maupin
#    Franklin Cooper Jr.
#
# create-sdcard.sh v0.3

# 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.

# Force locale language to be set to English. This avoids issues when doing
# text and string processing.
export LANG=C

# Determine the absolute path to the executable
# EXE will have the PWD removed so we can concatenate with the PWD safely
PWD=`pwd`
EXE=`echo $0 | sed s=$PWD==`
EXEPATH="$PWD"/"$EXE"
clear
cat << EOM

################################################################################

This script will create a bootable SD card from custom or pre-built binaries.

The script must be run with root permissions and from the bin directory of
the SDK

Example:
 $ sudo ./create-sdcard.sh

Formatting can be skipped if the SD card is already formatted and
partitioned properly.

################################################################################

EOM

# 检查脚本运行用户，也就是检查权限
AMIROOT=`whoami | awk {‘print $1‘}`
if [ "$AMIROOT" != "root" ] ; then

    echo "    **** Error *** must run script with sudo"
    echo ""
    exit
fi

THEPWD=$EXEPATH
PARSEPATH=`echo $THEPWD | grep -o ‘.*ti-processor-sdk-linux-am335x-evm-01.00.00.00/‘`

if [ "$PARSEPATH" != "" ] ; then
PATHVALID=1
else
PATHVALID=0
fi

#Precentage function
# 解压文件，以百分比来显示
untar_progress ()
{
    TARBALL=$1;
    DIRECTPATH=$2;
    # 1. 获取解压后总共是多大：gzip --list ${TARBALL} | sed -n -e "s/.*[[:space:]]\+[0-9]\+[[:space:]]\+\([0-9]\+\)[[:space:]].*$/\1/p")
    # 2. 51200 = 512*100
    # 3. 一共有多少个512：$(gzip --list ${TARBALL} | sed -n -e "s/.*[[:space:]]\+[0-9]\+[[:space:]]\+\([0-9]\+\)[[:space:]].*$/\1/p") / 512
    # 4. 算百分比的时候，一个百分比站多少个块：$(gzip --list ${TARBALL} | sed -n -e "s/.*[[:space:]]\+[0-9]\+[[:space:]]\+\([0-9]\+\)[[:space:]].*$/\1/p") / 51200
    # 5. 有些数据不够512整除，所以多加1，保证最后是100%：$(gzip --list ${TARBALL} | sed -n -e "s/.*[[:space:]]\+[0-9]\+[[:space:]]\+\([0-9]\+\)[[:space:]].*$/\1/p") / 51200 + 1
    BLOCKING_FACTOR=$(($(gzip --list ${TARBALL} | sed -n -e "s/.*[[:space:]]\+[0-9]\+[[:space:]]\+\([0-9]\+\)[[:space:]].*$/\1/p") / 51200 + 1));
    # --block-number                每个信息都显示归档内的块数
    # --checkpoint                  每隔 NUMBER 个记录显示进度信息(默认为 10 个)
    # --checkpoint-action=ACTION    在每个检查点上执行 ACTION 
    tar --blocking-factor=${BLOCKING_FACTOR} --checkpoint=1 --checkpoint-action=‘ttyout=Written %u%  \r‘ -zxf ${TARBALL} -C ${DIRECTPATH}
}

#copy/paste programs
# 拷贝文件，以当前是多少字节，一共有多少字节来显示。
cp_progress ()
{
    CURRENTSIZE=0
    while [ $CURRENTSIZE -lt $TOTALSIZE ]
    do
        TOTALSIZE=$1;
        TOHERE=$2;
        CURRENTSIZE=`sudo du -c $TOHERE | grep total | awk {‘print $1‘}`
        echo -e -n "$CURRENTSIZE /  $TOTALSIZE copied \r"
        sleep 1
    done
}

# 如下面所述，这一部分是不一定能够获取到SD卡的设备节点的。
check_for_sdcards()
{
        # find the avaible SD cards
        # Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ mount
        # /dev/sda1 on / type ext4 (rw,errors=remount-ro)
        # proc on /proc type proc (rw,noexec,nosuid,nodev)
        # sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
        # none on /sys/fs/fuse/connections type fusectl (rw)
        # none on /sys/kernel/debug type debugfs (rw)
        # none on /sys/kernel/security type securityfs (rw)
        # udev on /dev type devtmpfs (rw,mode=0755)
        # devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
        # tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
        # none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
        # none on /run/shm type tmpfs (rw,nosuid,nodev)
        # rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw)
        # nfsd on /proc/fs/nfsd type nfsd (rw)
        # vmware-vmblock on /run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,default_permissions,allow_other)
        # gvfs-fuse-daemon on /home/Qt/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=Qt)
        # /dev/sdb1 on /media/boot type vfat (rw,nosuid,nodev,uid=1001,gid=1001,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks)
        # Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ mount | grep ‘on / ‘ | awk {‘print $1‘} |  cut -c6-8
sda
        # Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ 
        # 从上面的程序来看，其实下面这行代码是错的，获取到的是sda，硬盘的文件设备节点
        ROOTDRIVE=`mount | grep ‘on / ‘ | awk {‘print $1‘} |  cut -c6-8`
        # Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ cat /proc/partitions | grep -v sda | grep -e ‘\<sd.\>\|\<mmcblk.\>‘ | grep -e -n ‘‘
        # grep: : No such file or directory
        # Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ 
        PARTITION_TEST=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘`
        if [ "$PARTITION_TEST" = "" ]; then
            echo -e "Please insert a SD card to continue\n"
            while [ "$PARTITION_TEST" = "" ]; do
                read -p "Type ‘y‘ to re-detect the SD card or ‘n‘ to exit the script: " REPLY
                if [ "$REPLY" = ‘n‘ ]; then
                    exit 1
                fi
                ROOTDRIVE=`mount | grep ‘on / ‘ | awk {‘print $1‘} |  cut -c6-8`
                PARTITION_TEST=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘`
            done
        fi
}

populate_3_partitions() {
    ENTERCORRECTLY="0"
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -e -p ‘Enter path where SD card tarballs were downloaded : ‘  TARBALLPATH

        echo ""
        ENTERCORRECTLY=1
        if [ -d $TARBALLPATH ]
        then
            echo "Directory exists"
            echo ""
            echo "This directory contains:"
            ls $TARBALLPATH
            echo ""
            read -p ‘Is this correct? [y/n] : ‘ ISRIGHTPATH
                case $ISRIGHTPATH in
                "y" | "Y") ;;
                "n" | "N" ) ENTERCORRECTLY=0;continue;;
                *)  echo "Please enter y or n";ENTERCORRECTLY=0;continue;;
                esac
        else
            echo "Invalid path make sure to include complete path"
            ENTERCORRECTLY=0
            continue
        fi
        # Check that tarballs were found
        if [ ! -e "$TARBALLPATH""/boot_partition.tar.gz" ]
        then
            echo "Could not find boot_partition.tar.gz as expected.  Please"
            echo "point to the directory containing the boot_partition.tar.gz"
            ENTERCORRECTLY=0
            continue
        fi

        if [ ! -e "$TARBALLPATH""/rootfs_partition.tar.gz" ]
        then
            echo "Could not find rootfs_partition.tar.gz as expected.  Please"
            echo "point to the directory containing the rootfs_partition.tar.gz"
            ENTERCORRECTLY=0
            continue
        fi

        if [ ! -e "$TARBALLPATH""/start_here_partition.tar.gz" ]
        then
            echo "Could not find start_here_partition.tar.gz as expected.  Please"
            echo "point to the directory containing the start_here_partition.tar.gz"
            ENTERCORRECTLY=0
            continue
        fi
    done

    # Make temporary directories and untar mount the partitions
    mkdir $PWD/boot
    mkdir $PWD/rootfs
    mkdir $PWD/start_here
    mkdir $PWD/tmp

    mount -t vfat ${DRIVE}${P}1 boot
    mount -t ext3 ${DRIVE}${P}2 rootfs
    mount -t ext3 ${DRIVE}${P}3 start_here

    # Remove any existing content in case the partitions were not
    # recreated
    sudo rm -rf boot/*
    sudo rm -rf rootfs/*
    sudo rm -rf start_here/*

    # Extract the tarball contents.
cat << EOM

################################################################################
        Extracting boot partition tarball

################################################################################
EOM
        untar_progress $TARBALLPATH/boot_partition.tar.gz tmp/
        if [ -e "./tmp/MLO" ]
        then
            cp ./tmp/MLO boot/          # 这不多此一举。
        fi
        cp -rf ./tmp/* boot/

cat << EOM

################################################################################
        Extracting rootfs partition tarball

################################################################################
EOM
        untar_progress $TARBALLPATH/rootfs_partition.tar.gz rootfs/

cat << EOM

################################################################################
        Extracting start_here partition to temp directory

################################################################################
EOM
        rm -rf tmp/*
        untar_progress $TARBALLPATH/start_here_partition.tar.gz tmp/

cat << EOM

################################################################################
        Extracting CCS tarball

################################################################################
EOM
        mv tmp/CCS-5*.tar.gz .
        untar_progress CCS-5*.tar.gz tmp/
        rm CCS-5*.tar.gz

cat << EOM

################################################################################
        Copying Contents to START_HERE

################################################################################
EOM

        TOTALSIZE=`sudo du -c tmp/* | grep total | awk {‘print $1‘}`
        cp -rf tmp/* start_here/ &
        cp_progress $TOTALSIZE start_here/      # 这里没有使用百分比来显示。
        sync;sync
        # Fix up the START_HERE partitoin permissions
        chown nobody -R start_here
        chgrp nogroup -R start_here
        chmod -R g+r+x,o+r+x start_here/CCS

        umount boot rootfs start_here           # 卸载各个设备节点
        sync;sync

        # Clean up the temp directories
        rm -rf boot rootfs start_here tmp       # 删除各个文件夹，做完了也就没必要了
}


# find the avaible SD cards
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ mount | grep ‘on / ‘ | awk {‘print $1‘} |  cut -c6-9
# sda1
# Qt@aplex:~/ti-processor-sdk-linux-am335x-evm-01.00.00.00$ 
# 这里的ROOTDRIVE会得到sda1，所以这一部分代码应该都不会符合预期
ROOTDRIVE=`mount | grep ‘on / ‘ | awk {‘print $1‘} |  cut -c6-9`
if [ "$ROOTDRIVE" = "root" ]; then
    ROOTDRIVE=`readlink /dev/root | cut -c1-3`
else
    ROOTDRIVE=`echo $ROOTDRIVE | cut -c1-3`
fi

PARTITION_TEST=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘`

# Check for available mounts
check_for_sdcards

echo -e "\nAvailible Drives to write images to: \n"
echo "#  major   minor    size   name "
cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘
echo " "

DEVICEDRIVENUMBER=
while true;
do
    read -p ‘Enter Device Number or ‘n‘ to exit: ‘ DEVICEDRIVENUMBER
    echo " "
        if [ "$DEVICEDRIVENUMBER" = ‘n‘ ]; then
                exit 1
        fi

        if [ "$DEVICEDRIVENUMBER" = "" ]; then
                # Check to see if there are any changes
                check_for_sdcards
                echo -e "These are the Drives available to write images to:"
                echo "#  major   minor    size   name "
                cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘
                echo " "
               continue
        fi

    DEVICEDRIVENAME=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘ | grep "${DEVICEDRIVENUMBER}:" | awk ‘{print $5}‘`
    if [ -n "$DEVICEDRIVENAME" ]
    then
            DRIVE=/dev/$DEVICEDRIVENAME
            DEVICESIZE=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘ | grep "${DEVICEDRIVENUMBER}:" | awk ‘{print $4}‘`
        break
    else
        echo -e "Invalid selection!"
                # Check to see if there are any changes
                check_for_sdcards
                echo -e "These are the only Drives available to write images to: \n"
                echo "#  major   minor    size   name "
                cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<sd.\>\|\<mmcblk.\>‘ | grep -n ‘‘
                echo " "
    fi
done

echo "$DEVICEDRIVENAME was selected"
#Check the size of disk to make sure its under 16GB
if [ $DEVICESIZE -gt 17000000 ] ; then
cat << EOM

################################################################################

        **********WARNING**********

    Selected Device is greater then 16GB
    Continuing past this point will erase data from device
    Double check that this is the correct SD Card

################################################################################

EOM
    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -p ‘Would you like to continue [y/n] : ‘ SIZECHECK
        echo ""
        echo " "
        ENTERCORRECTLY=1
        case $SIZECHECK in
        "y")  ;;
        "n")  exit;;
        *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
        esac
        echo ""
    done

fi
echo ""

DRIVE=/dev/$DEVICEDRIVENAME
NUM_OF_DRIVES=`df | grep -c $DEVICEDRIVENAME`

# This if statement will determine if we have a mounted sdX or mmcblkX device.
# If it is mmcblkX, then we need to set an extra char in the partition names, ‘p‘,
# to account for /dev/mmcblkXpY labled partitions.
if [[ ${DEVICEDRIVENAME} =~ ^sd. ]]; then
    echo "$DRIVE is an sdx device"
    P=‘‘
else
    echo "$DRIVE is an mmcblkx device"
    P=‘p‘
fi

if [ "$NUM_OF_DRIVES" != "0" ]; then
    echo "Unmounting the $DEVICEDRIVENAME drives"
    for ((c=1; c<="$NUM_OF_DRIVES"; c++ ))
    do
            unmounted=`df | grep ‘\<‘$DEVICEDRIVENAME$P$c‘\>‘ | awk ‘{print $1}‘`
            if [ -n "$unmounted" ]
            then
                 echo " unmounted ${DRIVE}$P$c"
                 sudo umount -f ${DRIVE}$P$c
            fi

    done
fi

# Refresh this variable as the device may not be mounted at script instantiation time
# This will always return one more then needed
NUM_OF_PARTS=`cat /proc/partitions | grep -v $ROOTDRIVE | grep -c $DEVICEDRIVENAME`
for ((c=1; c<"$NUM_OF_PARTS"; c++ ))
do
        SIZE=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<‘$DEVICEDRIVENAME$P$c‘\>‘  | awk ‘{print $3}‘`
        echo "Current size of $DEVICEDRIVENAME$P$c $SIZE bytes"
done

# check to see if the device is already partitioned
for ((  c=1; c<5; c++ ))
do
    eval "SIZE$c=`cat /proc/partitions | grep -v $ROOTDRIVE | grep ‘\<‘$DEVICEDRIVENAME$P$c‘\>‘  | awk ‘{print $3}‘`"
done

PARTITION="0"
if [ -n "$SIZE1" -a -n "$SIZE2" ] ; then
    if  [ "$SIZE1" -gt "72000" -a "$SIZE2" -gt "700000" ]
    then
        PARTITION=1

        if [ -z "$SIZE3" -a -z "$SIZE4" ]
        then
            #Detected 2 partitions
            PARTS=2

        elif [ "$SIZE3" -gt "1000" -a -z "$SIZE4" ]
        then
            #Detected 3 partitions
            PARTS=3

        else
            echo "SD Card is not correctly partitioned"
            PARTITION=0
        fi
    fi
else
    echo "SD Card is not correctly partitioned"
    PARTITION=0
    PARTS=0
fi


#Partition is found
if [ "$PARTITION" -eq "1" ]
then
cat << EOM

################################################################################

   Detected device has $PARTS partitions already

   Re-partitioning will allow the choice of 2 or 3 partitions

################################################################################

EOM

    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -p ‘Would you like to re-partition the drive anyways [y/n] : ‘ CASEPARTITION
        echo ""
        echo " "
        ENTERCORRECTLY=1
        case $CASEPARTITION in
        "y")  echo "Now partitioning $DEVICEDRIVENAME ...";PARTITION=0;;
        "n")  echo "Skipping partitioning";;
        *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
        esac
        echo ""
    done

fi

#Partition is not found, choose to partition 2 or 3 segments
if [ "$PARTITION" -eq "0" ]
then
cat << EOM

################################################################################

    Select 2 partitions if only need boot and rootfs (most users)
    Select 3 partitions if need SDK & CCS on SD card.  This is usually used
        by device manufacturers with access to partition tarballs.

    ****WARNING**** continuing will erase all data on $DEVICEDRIVENAME

################################################################################

EOM
    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do

        read -p ‘Number of partitions needed [2/3] : ‘ CASEPARTITIONNUMBER
        echo ""
        echo " "
        ENTERCORRECTLY=1
        case $CASEPARTITIONNUMBER in
        "2")  echo "Now partitioning $DEVICEDRIVENAME with 2 partitions...";PARTITION=2;;
        "3")  echo "Now partitioning $DEVICEDRIVENAME with 3 partitions...";PARTITION=3;;
        "n")  exit;;
        *)  echo "Please enter 2 or 3";ENTERCORRECTLY=0;;
        esac
        echo " "
    done
fi



#Section for partitioning the drive

#create 3 partitions
if [ "$PARTITION" -eq "3" ]
then

# set the PARTS value as well
PARTS=3

cat << EOM

################################################################################

        Now making 3 partitions

################################################################################

EOM

dd if=/dev/zero of=$DRIVE bs=1024 count=1024

SIZE=`fdisk -l $DRIVE | grep Disk | awk ‘{print $5}‘`

echo DISK SIZE - $SIZE bytes

CYLINDERS=`echo $SIZE/255/63/512 | bc`

sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE << EOF
,9,0x0C,*
10,90,,-
100,,,-
EOF

cat << EOM

################################################################################

        Partitioning Boot

################################################################################
EOM
    mkfs.vfat -F 32 -n "boot" ${DRIVE}${P}1
cat << EOM

################################################################################

        Partitioning Rootfs

################################################################################
EOM
    mkfs.ext3 -L "rootfs" ${DRIVE}${P}2
cat << EOM

################################################################################

        Partitioning START_HERE

################################################################################
EOM
    mkfs.ext3 -L "START_HERE" ${DRIVE}${P}3
    sync
    sync

#create only 2 partitions
elif [ "$PARTITION" -eq "2" ]
then

# Set the PARTS value as well
PARTS=2
cat << EOM

################################################################################

        Now making 2 partitions

################################################################################

EOM
dd if=/dev/zero of=$DRIVE bs=1024 count=1024

SIZE=`fdisk -l $DRIVE | grep Disk | awk ‘{print $5}‘`

echo DISK SIZE - $SIZE bytes

CYLINDERS=`echo $SIZE/255/63/512 | bc`

sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE << EOF
,9,0x0C,*
10,,,-
EOF

cat << EOM

################################################################################

        Partitioning Boot

################################################################################
EOM
    mkfs.vfat -F 32 -n "boot" ${DRIVE}${P}1
cat << EOM

################################################################################

        Partitioning rootfs

################################################################################
EOM
    mkfs.ext3 -L "rootfs" ${DRIVE}${P}2
    sync
    sync
    INSTALLSTARTHERE=n
fi



#Break between partitioning and installing file system
cat << EOM


################################################################################

   Partitioning is now done
   Continue to install filesystem or select ‘n‘ to safe exit

   **Warning** Continuing will erase files any files in the partitions

################################################################################


EOM
ENTERCORRECTLY=0
while [ $ENTERCORRECTLY -ne 1 ]
do
    read -p ‘Would you like to continue? [y/n] : ‘ EXITQ
    echo ""
    echo " "
    ENTERCORRECTLY=1
    case $EXITQ in
    "y") ;;
    "n") exit;;
    *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
    esac
done

# If this is a three partition card then we will jump to a function to
# populate the three partitions and then exit the script.  If not we
# go on to prompt the user for input on the two partitions
if [ "$PARTS" -eq "3" ]
then
    populate_3_partitions
    exit 0
fi

#Add directories for images
export START_DIR=$PWD
mkdir $START_DIR/tmp
export PATH_TO_SDBOOT=boot
export PATH_TO_SDROOTFS=rootfs
export PATH_TO_TMP_DIR=$START_DIR/tmp


echo " "
echo "Mount the partitions "
mkdir $PATH_TO_SDBOOT
mkdir $PATH_TO_SDROOTFS

sudo mount -t vfat ${DRIVE}${P}1 boot/
sudo mount -t ext3 ${DRIVE}${P}2 rootfs/



echo " "
echo "Emptying partitions "
echo " "
sudo rm -rf  $PATH_TO_SDBOOT/*
sudo rm -rf  $PATH_TO_SDROOTFS/*

echo ""
echo "Syncing...."
echo ""
sync
sync
sync

cat << EOM
################################################################################

    Choose file path to install from

    1 ) Install pre-built images from SDK
    2 ) Enter in custom boot and rootfs file paths

################################################################################

EOM
ENTERCORRECTLY=0
while [ $ENTERCORRECTLY -ne 1 ]
do
    read -p ‘Choose now [1/2] : ‘ FILEPATHOPTION
    echo ""
    echo " "
    ENTERCORRECTLY=1
    case $FILEPATHOPTION in
    "1") echo "Will now install from SDK pre-built images";;
    "2") echo "";;
    *)  echo "Please enter 1 or 2";ENTERCORRECTLY=0;;
    esac
done

# SDK DEFAULTS
if [ $FILEPATHOPTION -eq 1 ] ; then

    #check that in the right directory

    THEEVMSDK=`echo $PARSEPATH | grep -o ‘ti-processor-sdk-linux-am335x-evm-01.00.00.00‘`

    if [ $PATHVALID -eq 1 ]; then
    echo "now installing:  $THEEVMSDK"
    else
    echo "no SDK PATH found"
    ENTERCORRECTLY=0
        while [ $ENTERCORRECTLY -ne 1 ]
        do
            read -e -p ‘Enter path to SDK : ‘  SDKFILEPATH

            echo ""
            ENTERCORRECTLY=1
            if [ -d $SDKFILEPATH ]
            then
                echo "Directory exists"
                echo ""
                PARSEPATH=`echo $SDKFILEPATH | grep -o ‘.*ti-processor-sdk-linux-am335x-evm-01.00.00.00/‘`
                #echo $PARSEPATH

                if [ "$PARSEPATH" != "" ] ; then
                PATHVALID=1
                else
                PATHVALID=0
                fi
                #echo $PATHVALID
                if [ $PATHVALID -eq 1 ] ; then

                THEEVMSDK=`echo $SDKFILEPATH | grep -o ‘ti-processor-sdk-linux-am335x-evm-01.00.00.00‘`
                echo "Is this the correct SDK: $THEEVMSDK"
                echo ""
                read -p ‘Is this correct? [y/n] : ‘ ISRIGHTPATH
                    case $ISRIGHTPATH in
                    "y") ;;
                    "n") ENTERCORRECTLY=0;;
                    *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
                    esac
                else
                echo "Invalid SDK path make sure to include ti-sdk-xxxx"
                ENTERCORRECTLY=0
                fi

            else
                echo "Invalid path make sure to include complete path"

                ENTERCORRECTLY=0
            fi
        done
    fi



    #check that files are in SDK
    BOOTFILEPATH="$PARSEPATH/board-support/prebuilt-images"
    MLO=`ls $BOOTFILEPATH | grep MLO | awk {‘print $1‘}`
    KERNELIMAGE=`ls $BOOTFILEPATH | grep [uz]Image | awk {‘print $1‘}`
    BOOTIMG=`ls $BOOTFILEPATH | grep u-boot | grep .img | awk {‘print $1‘}`
    BOOTBIN=`ls $BOOTFILEPATH | grep u-boot | grep .bin | awk {‘print $1‘}`
    BOOTUENV=`ls $BOOTFILEPATH | grep uEnv.txt | awk {‘print $1‘}`
    #rootfs
    ROOTFILEPARTH="$PARSEPATH/filesystem"
    #ROOTFSTAR=`ls  $ROOTFILEPARTH | grep tisdk-rootfs | awk {‘print $1‘}`

    #Make sure there is only 1 tar
    CHECKNUMOFTAR=`ls $ROOTFILEPARTH | grep "tisdk-rootfs" | grep ‘tar.gz‘ | grep -n ‘‘ | grep ‘2:‘ | awk {‘print $1‘}`
    if [ -n "$CHECKNUMOFTAR" ]
    then
cat << EOM

################################################################################

   Multiple rootfs Tarballs found

################################################################################

EOM
        ls $ROOTFILEPARTH | grep "tisdk-rootfs" | grep ‘tar.gz‘ | grep -n ‘‘ | awk {‘print "    " , $1‘}
        echo ""
        read -p "Enter Number of rootfs Tarball: " TARNUMBER
        echo " "
        FOUNDTARFILENAME=`ls $ROOTFILEPARTH | grep "rootfs" | grep ‘tar.gz‘ | grep -n ‘‘ | grep "${TARNUMBER}:" | cut -c3- | awk {‘print$1‘}`
        ROOTFSTAR=$FOUNDTARFILENAME

    else
        ROOTFSTAR=`ls  $ROOTFILEPARTH | grep "tisdk-rootfs" | grep ‘tar.gz‘ | awk {‘print $1‘}`
    fi

    ROOTFSUSERFILEPATH=$ROOTFILEPARTH/$ROOTFSTAR
    BOOTPATHOPTION=1
    ROOTFSPATHOPTION=2

elif [ $FILEPATHOPTION -eq 2  ] ; then
cat << EOM
################################################################################

  For U-boot and MLO

  If files are located in Tarball write complete path including the file name.
      e.x. $:  /home/user/MyCustomTars/boot.tar.gz

  If files are located in a directory write the directory path
      e.x. $: /ti-sdk/board-support/prebuilt-images/

  NOTE: Not all platforms will have an MLO file and this file can
        be ignored for platforms that do not support an MLO.

  Update: The proper location for the kernel image and device tree
          files have moved from the boot partition to the root filesystem.

################################################################################

EOM
    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -e -p ‘Enter path for Boot Partition : ‘  BOOTUSERFILEPATH

        echo ""
        ENTERCORRECTLY=1
        if [ -f $BOOTUSERFILEPATH ]
        then
            echo "File exists"
            echo ""
        elif [ -d $BOOTUSERFILEPATH ]
        then
            echo "Directory exists"
            echo ""
            echo "This directory contains:"
            ls $BOOTUSERFILEPATH
            echo ""
            read -p ‘Is this correct? [y/n] : ‘ ISRIGHTPATH
                case $ISRIGHTPATH in
                "y") ;;
                "n") ENTERCORRECTLY=0;;
                *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
                esac
        else
            echo "Invalid path make sure to include complete path"

            ENTERCORRECTLY=0
        fi
    done


cat << EOM


################################################################################

   For Kernel Image and Device Trees files

    What would you like to do?
     1) Reuse kernel image and device tree files found in the selected rootfs.
     2) Provide a directory that contains the kernel image and device tree files
        to be used.

################################################################################

EOM

ENTERCORRECTLY=0
while [ $ENTERCORRECTLY -ne 1 ]
do

    read -p ‘Choose option 1 or 2 : ‘ CASEOPTION
    echo ""
    echo " "
    ENTERCORRECTLY=1
    case $CASEOPTION in
        "1")  echo "Reusing kernel and dt files from the rootfs‘s boot directory";KERNELFILESOPTION=1;;
        "2")  echo "Choosing a directory that contains the kernel files to be used";KERNELFILESOPTION=2;;
        "n")  exit;;
        *)  echo "Please enter 1 or 2";ENTERCORRECTLY=0;;
    esac
    echo " "
done

if [ $KERNELFILESOPTION == 2 ]
then

cat << EOM
################################################################################

  For Kernel Image and Device Trees files

  The kernel image name should contain the image type uImage or zImage depending
  on which format is used.

  The device tree files must end with .dtb
      e.g    am335x-evm.dtb am43x-gp-evm.dtb


################################################################################

EOM
    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -e -p ‘Enter path for kernel image and device tree files : ‘  KERNELUSERFILEPATH

        echo ""
        ENTERCORRECTLY=1

        if [ -d $KERNELUSERFILEPATH ]
        then
            echo "Directory exists"
            echo ""
            echo "This directory contains:"
            ls $KERNELUSERFILEPATH
            echo ""
            read -p ‘Is this correct? [y/n] : ‘ ISRIGHTPATH
            case $ISRIGHTPATH in
                "y") ;;
                "n") ENTERCORRECTLY=0;;
                *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
                esac
        else
            echo "Invalid path make sure to include complete path"
            ENTERCORRECTLY=0
        fi
    done
fi

cat << EOM


################################################################################

   For Rootfs partition

   If files are located in Tarball write complete path including the file name.
      e.x. $:  /home/user/MyCustomTars/rootfs.tar.gz

  If files are located in a directory write the directory path
      e.x. $: /ti-sdk/targetNFS/

################################################################################

EOM
    ENTERCORRECTLY=0
    while [ $ENTERCORRECTLY -ne 1 ]
    do
        read -e -p ‘Enter path for Rootfs Partition : ‘ ROOTFSUSERFILEPATH
        echo ""
        ENTERCORRECTLY=1
        if [ -f $ROOTFSUSERFILEPATH ]
        then
            echo "File exists"
            echo ""
        elif [ -d $ROOTFSUSERFILEPATH ]
        then
            echo "This directory contains:"
            ls $ROOTFSUSERFILEPATH
            echo ""
            read -p ‘Is this correct? [y/n] : ‘ ISRIGHTPATH
                case $ISRIGHTPATH in
                "y") ;;
                "n") ENTERCORRECTLY=0;;
                *)  echo "Please enter y or n";ENTERCORRECTLY=0;;
                esac

        else
            echo "Invalid path make sure to include complete path"

            ENTERCORRECTLY=0
        fi
    done
    echo ""


    # Check if user entered a tar or not for Boot
    ISBOOTTAR=`ls $BOOTUSERFILEPATH | grep .tar.gz | awk {‘print $1‘}`
    if [ -n "$ISBOOTTAR" ]
    then
        BOOTPATHOPTION=2
    else
        BOOTPATHOPTION=1
        BOOTFILEPATH=$BOOTUSERFILEPATH
        MLO=`ls $BOOTFILEPATH | grep MLO | awk {‘print $1‘}`
        BOOTIMG=`ls $BOOTFILEPATH | grep u-boot | grep .img | awk {‘print $1‘}`
        BOOTBIN=`ls $BOOTFILEPATH | grep u-boot | grep .bin | awk {‘print $1‘}`
        BOOTUENV=`ls $BOOTFILEPATH | grep uEnv.txt | awk {‘print $1‘}`
    fi


    if [ "$KERNELFILESOPTION" == "2" ]
    then
        KERNELIMAGE=`ls $KERNELUSERFILEPATH | grep [uz]Image | awk {‘print $1‘}`
        DTFILES=`ls $KERNELUSERFILEPATH | grep .dtb$ | awk {‘print $1‘}`
    fi


    #Check if user entered a tar or not for Rootfs
    ISROOTFSTAR=`ls $ROOTFSUSERFILEPATH | grep .tar.gz | awk {‘print $1‘}`
    if [ -n "$ISROOTFSTAR" ]
    then
        ROOTFSPATHOPTION=2
    else
        ROOTFSPATHOPTION=1
        ROOTFSFILEPATH=$ROOTFSUSERFILEPATH
    fi
fi

cat << EOM
################################################################################

    Copying files now... will take minutes

################################################################################

Copying boot partition
EOM


if [ $BOOTPATHOPTION -eq 1 ] ; then

    echo ""
    #copy boot files out of board support
    if [ "$MLO" != "" ] ; then
        cp $BOOTFILEPATH/$MLO $PATH_TO_SDBOOT/MLO
        echo "MLO copied"
    else
        echo "MLO file not found"
    fi

    echo ""

    echo ""

    if [ "$BOOTIMG" != "" ] ; then
        cp $BOOTFILEPATH/$BOOTIMG $PATH_TO_SDBOOT/u-boot.img
        echo "u-boot.img copied"
    elif [ "$BOOTBIN" != "" ] ; then
        cp $BOOTFILEPATH/$BOOTBIN $PATH_TO_SDBOOT/u-boot.bin
        echo "u-boot.bin copied"
    else
        echo "No U-Boot file found"
    fi

    echo ""

    if [ "$BOOTUENV" != "" ] ; then
        cp $BOOTFILEPATH/$BOOTUENV $PATH_TO_SDBOOT/uEnv.txt
        echo "uEnv.txt copied"
    fi

elif [ $BOOTPATHOPTION -eq 2  ] ; then
    untar_progress $BOOTUSERFILEPATH $PATH_TO_TMP_DIR
    cp -rf $PATH_TO_TMP_DIR/* $PATH_TO_SDBOOT
    echo ""

fi

echo ""
sync

echo "Copying rootfs System partition"
if [ $ROOTFSPATHOPTION -eq 1 ] ; then
    TOTALSIZE=`sudo du -c $ROOTFSUSERFILEPATH/* | grep total | awk {‘print $1‘}`
    sudo cp -r $ROOTFSUSERFILEPATH/* $PATH_TO_SDROOTFS & cp_progress $TOTALSIZE $PATH_TO_SDROOTFS

elif [ $ROOTFSPATHOPTION -eq 2  ] ; then
    untar_progress $ROOTFSUSERFILEPATH $PATH_TO_SDROOTFS
fi

echo ""
echo ""
echo "Syncing..."
sync
sync
sync
sync
sync
sync
sync
sync

if [ "$KERNELFILESOPTION" == "2" ]
then

    mkdir -p $PATH_TO_SDROOTFS/boot

    if [ "$KERNELIMAGE" != "" ] ; then

        CLEANKERNELNAME=`ls "$BOOTFILEPATH/$KERNELIMAGE" | grep -o [uz]Image`
        cp -f $KERNELUSERFILEPATH/$KERNELIMAGE $PATH_TO_SDROOTFS/boot/$CLEANKERNELNAME
        echo "Kernel image copied"
    else
        echo "$KERNELIMAGE file not found"
    fi

    COPYINGDTB="false"
    for dtb in $DTFILES
    do
        if [ -f "$KERNELUSERFILEPATH/$dtb" ] ; then
            cp -f $KERNELUSERFILEPATH/$dtb $PATH_TO_SDROOTFS/boot
            echo "$dtb copied"
            COPYINGDTB="true"
        fi
    done

    if [ "$COPYINGDTB" == "false" ]
    then
        echo "No device tree files found"
    fi

fi

echo " "
echo "Un-mount the partitions "
sudo umount -f $PATH_TO_SDBOOT
sudo umount -f $PATH_TO_SDROOTFS


echo " "
echo "Remove created temp directories "
sudo rm -rf $PATH_TO_TMP_DIR
sudo rm -rf $PATH_TO_SDROOTFS
sudo rm -rf $PATH_TO_SDBOOT


echo " "
echo "Operation Finished"
echo " "